1,829 results match your criteria Struvite and Staghorn Calculi


A new thermodynamic approach for struvite product quality prediction.

Environ Sci Pollut Res Int 2018 Dec 13. Epub 2018 Dec 13.

Department of Chemical & Materials Engineering, University of Auckland, 2-6 Park Avenue - Bldg 529, Grafton, Auckland, 1023, New Zealand.

Struvite precipitation has drawn much attention in the last decade as a green chemical process for phosphorus removal and recovery. Product purity affects the usefulness, and thus price, of the product when recovered struvite is sold as fertilizer. However, there is currently little research on struvite quality, as well as on models for accurately predicting. Read More

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December 2018

Predictors of Symptomatic Kidney Stone Recurrence After the First and Subsequent Episodes.

Mayo Clin Proc 2018 Nov 29. Epub 2018 Nov 29.

Division of Nephrology and Hypertension, Mayo Clinic, Rochester, MN; Division of Epidemiology, Mayo Clinic, Rochester, MN. Electronic address:

Objective: To predict symptomatic recurrence among community stone formers with one or more previous stone episodes.

Patients And Methods: A random sample of incident symptomatic kidney stone formers in Olmsted County, Minnesota, was followed for all symptomatic stone episodes resulting in clinical care from January 1, 1984, through January 31, 2017. Clinical and radiographic characteristics at each stone episode predictive of subsequent episodes were identified. Read More

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November 2018

Comparison of the performance of the IDEXX SediVue Dx® with manual microscopy for the detection of cells and 2 crystal types in canine and feline urine.

J Vet Intern Med 2018 Dec 3. Epub 2018 Dec 3.

Department of Veterinary Pathobiology, Texas A&M University College of Veterinary Medicine and Biomedical Sciences, College Station, Texas.

Background: Microscopic evaluation of urine is inconsistently performed in veterinary clinics. The IDEXX SediVue Dx® Urine Sediment Analyzer (SediVue) recently was introduced for automated analysis of canine and feline urine and may facilitate performance of urinalyses in practice.

Objective: Compare the performance of the SediVue with manual microscopy for detecting clinically relevant numbers of cells and 2 crystal types. Read More

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December 2018
1 Read

Techno-economic feasibility of recovering phosphorus, nitrogen and water from dilute human urine via forward osmosis.

Water Res 2018 Nov 22;150:47-55. Epub 2018 Nov 22.

School of Civil and Environmental Engineering, University of Technology, Sydney (UTS), City Campus, Broadway, NSW, 2007, Australia. Electronic address:

Due to high phosphorus (P) and nitrogen (N) content, human urine has often proven to suitable raw material for fertiliser production. However, most of the urine diverting toilets or male urinals dilute the urine 2 to 10 times. This decreases the efficiency in the precipitation of P and stripping of N. Read More

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November 2018
3 Reads

Comparative study of heavy metal residues in struvite products recovered from swine wastewater using fluidised bed and stirred reactors.

Water Sci Technol 2018 Nov;78(8):1642-1651

College of the Environment & Ecology, Xiamen University, No. 422 Siming South Road, Xiamen City, Fujian 361005, China.

Struvite (MgNHPO·6HO) crystallisation is a promising approach for phosphorus recovery from swine wastewater. Currently, intensive pig feeding has made heavy metals (HMs) extensive in swine wastewater; therefore, significant amounts of HMs have been detected in struvite recovery products. In this study, the HM residues in the struvite products recovered from stirred and fluidised bed reactors were investigated. Read More

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November 2018

Influence of process parameters on the heavy metal (Zn, Cu and Cr) content of struvite obtained from synthetic swine wastewater.

Environ Pollut 2018 Nov 16;245:658-665. Epub 2018 Nov 16.

Department of Chemical & Materials Engineering, University of Auckland, New Zealand.

Struvite recovered from swine wastewater can be used as a good slow release fertilizer. Nevertheless, the presence of heavy metals would be easily precipitated with struvite and increase the ecological risk for its agricultural use. This paper investigated the possibility of using process variables for heavy metal (Cu, Zn and Cr) minimization during struvite crystallization in swine wastewater. Read More

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November 2018
1 Read

Cofermenting Algal Biomass with Municipal Primary Solids to Enhance Carboxylate Production.

Water Environ Res 2018 Nov;90(11):1997-2007

As water resource recovery facilities (WRRFs) implement biological nutrient removal (BNR) processes to remove excess wastewater nutrients, carboxylic acid demands increase; resource recovery processes (e.g., struvite, polyhydroxyalkanoate production) also demand carboxylates. Read More

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November 2018

The correlation of crystalline and elemental composition of urinary stones with a history of bacterial infections: TXRF, XRPD and PCR-DGGE studies.

Eur Biophys J 2018 Nov 27. Epub 2018 Nov 27.

2nd Department of Urology, Medical University of Lodz, Pabianicka St. 62, 93-513, Łódź, Poland.

The aim of this study was to analyze the correlation between past bacterial infections and the type and chemical composition of urinary stones experienced by human patients. Bacteria have been recognized to contribute to urinary stones; however, the role of uropathogens in the development of specific stones has not been extensively investigated. The detection of past bacterial infection (eleven different bacterial species) in urinary stones from 83 patients was made on a DNA level using polymerase chain reaction (PCR) and denaturing gradient gel electrophoresis (DGGE) and correlated with the chemical composition of urinary stones measured using X-ray powder diffraction (XPRD) technique and their elemental composition by total reflection X-ray fluorescence (TXRF). Read More

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November 2018
3 Reads

Response to Comment on "Application of Struvite Alters the Antibiotic Resistome in Soil, Rhizosphere, and Phyllosphere".

Environ Sci Technol 2018 Nov 27. Epub 2018 Nov 27.

Key Laboratory of Urban Environment and Health , Institute of Urban Environment, Chinese Academy of Sciences , 1799 Jimei Road , Xiamen 361021 , China.

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November 2018

Integrated process for anaerobically digested swine manure treatment.

Bioresour Technol 2018 Nov 14;273:506-514. Epub 2018 Nov 14.

Center for Biorefining and Department of Bioproducts and Biosystems Engineering, University of Minnesota, St. Paul, MN 55108, USA; The Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang, Jiangxi 330047, China. Electronic address:

An integrated three-step process was proposed for the treatment of the anaerobically digested swine manure (ADSM). The flocculation and struvite precipitation were used as the pre-treatment to remove the particles and reduce phosphorus to balance the condition for the algae growth. In the biological step, the 40% group (2. Read More

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November 2018
5 Reads

Alleviating Na effect on phosphate and potassium recovery from synthetic urine by K-struvite crystallization using different magnesium sources.

Sci Total Environ 2018 Nov 19;655:211-219. Epub 2018 Nov 19.

Center for Environmental Engineering Design, Chinese Academy of Environmental Sciences, Beijing 100012, China.

Human urine is characterized by high concentrations of nitrogen (N), phosphorus (P) and potassium (K), of which the P and K can be recovered as K-struvite crystals. This study first investigated the formation of Na-struvite because of the high Na present in the urine. From the results, the optimal pH for the Na-struvite crystallization was observed to be 12, and the rise in the Na concentration distinctly favored the Na-struvite formation. Read More

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November 2018
10 Reads

An integrated process for struvite electrochemical precipitation and ammonia oxidation of sludge alkaline hydrolysis supernatant.

Environ Sci Pollut Res Int 2018 Nov 23. Epub 2018 Nov 23.

Ministry of Education Key Laboratory of Pollution Control and Ecological Remediation for Industrial Agglomeration Area, School of Environment and Energy, State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510006, Guangdong, People's Republic of China.

This study reported two-phase electrochemical processes, including struvite electrochemical precipitation and ammonia electrooxidation, for the treatment of supernatant from the hydrolysis sludge. The results showed that in phase I, the removal efficiencies of 92.3% PO-P and 50. Read More

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November 2018

Comment on "Application of Struvite Alters the Antibiotic Resistome in Soil, Rhizosphere, and Phyllosphere".

Environ Sci Technol 2018 Nov 21. Epub 2018 Nov 21.

Van 't Hoff Institute for Molecular Sciences , University of Amsterdam , Science Park 904 , PO Box 94157, 1090 GD Amsterdam , The Netherlands.

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November 2018
4 Reads

Adsorption of micronutrient metal ion onto struvite to prepare slow release multielement fertilizer: Copper(II) doped-struvite.

Authors:
Hasan Arslanoglu

Chemosphere 2018 Nov 2;217:393-401. Epub 2018 Nov 2.

Department of Chemical Engineering, Firat University, 23200, Elazig, Turkey. Electronic address:

In this study, struvite (MgNHPO.6HO) sample was prepared by precipitation. Synthetic struvite was used as an adsorbent to remove Cu(II) from aqueous solution. Read More

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November 2018
4 Reads

Factors associated with hematuric struvite crystalluria in cats.

J Feline Med Surg 2018 Nov 5:1098612X18809176. Epub 2018 Nov 5.

2 Department of Population Medicine, Ontario Veterinary College, Guelph, ON, Canada.

Objectives: The aim of the study was to identify any dietary, signalment, geographic and clinical factors associated with hematuric struvite crystalluria (HSC) in a population of cats that visit general care veterinary hospitals in the USA.

Methods: In total, 4032 cats that had a first-time diagnosis of HSC and 8064 control cats with no history of hematuria or crystalluria were identified from medical records of all cats examined between 2007 and 2011 at 790 US veterinary hospitals. Extracted variables included age, sex, neuter status, breed, diet, urinalysis results and history of cystitis. Read More

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November 2018

Biochar seeding promotes struvite formation, but accelerates heavy metal accumulation.

Sci Total Environ 2018 Oct 23;652:623-632. Epub 2018 Oct 23.

Aarhus Institute of Advanced Studies, Aarhus University, Høegh-Guldbergs Gade 6B, DK-8000 Aarhus C, Denmark; Department of Bioscience, Aarhus University, Aarhus 8000C, Denmark. Electronic address:

This study investigated the effects of biochar seeding (wheat straw biochar and rice husk biochar) on nutrient recovery via struvite formation, and improvements in the particle size of precipitated struvite from anaerobic digestate supernatant. Simultaneously, the influence of biochar seeding on heavy metal accumulation and elimination of pathogens (total coliforms and Escherichia coli) was evaluated under various operational factors, e.g. Read More

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October 2018
6 Reads

Sustainable bio-hydrothermal sequencing treatment for asbestos-cement wastes.

J Hazard Mater 2019 Feb 15;364:256-263. Epub 2018 Oct 15.

Dipartimento di Ingegneria Civile, Ambientale, Edile, del Territorio e di Chimica, Politecnico di Bari, Via E. Orabona, 4, 70125, Bari, Italy.

In this paper, the treatment of asbestos-cement waste (ACW) has been attempted by a dark fermentation (DF) pre-treatment followed by hydrothermal and anaerobic digestion (AD) treatments. During DF, glucose, employed as a biodegradable substrate, was mainly converted to H-rich biogas and organic acids (OAs). The latter caused the dissolution of the cement matrix and the partial structural collapse of chrysotile (white asbestos). Read More

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February 2019

Epidemiology of urolithiasis in Asia.

Asian J Urol 2018 Oct 6;5(4):205-214. Epub 2018 Sep 6.

Department of Urology, Minimally Invasive Surgery Center, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.

In Asia, about 1%-19.1% of the population suffer from urolithiasis. However, due to variations in socio-economic status and geographic locations, the prevalence and incidence have changed in different countries or regions over the years. Read More

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October 2018
4 Reads

Resource recovery from pig manure via an integrated approach: A technical and economic assessment for full-scale applications.

Bioresour Technol 2019 Jan 11;272:582-593. Epub 2018 Oct 11.

Center for Microbial Ecology and Technology (CMET), Ghent University, Coupure Links 653, 9000 Gent, Belgium; Research Group of Sustainable Energy, Air and Water Technology, Department of Bioscience Engineering, Faculty of Science, University of Antwerp, Antwerpen, Belgium. Electronic address:

Intensive livestock farming cannot be uncoupled from the massive production of manure, requiring adequate management to avoid environmental damage. The high carbon, nitrogen and phosphorus content of pig manure enables targeted resource recovery. Here, fifteen integrated scenarios for recovery of water, nutrients and energy are compared in terms of technical feasibility and economic viability. Read More

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January 2019
7 Reads

Recovery of Phosphorus From Swine Manure by Ultrasound/HO Digestion, Struvite Crystallization, and Ferric Oxide Hydrate/Biochar Adsorption.

Front Chem 2018 8;6:464. Epub 2018 Oct 8.

Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of Ministry of Education, Biomass Engineering Center, College of Resources and Environmental Sciences, China Agricultural University, Beijing, China.

Swine manure is potentially harmful to the environment but is also a readily accessible local source of phosphorus (P) for agricultural use. Decreasing the environmental impact of swine manure and recovering P from swine manure have been a challenge for a long time. In this study, an integrated process involving ultrasound/HO digestion, struvite crystallization, and ferric oxide hydrate (HFO)/biochar adsorption was used to recover P from swine manure. Read More

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October 2018
2 Reads

Phosphorous recovery through struvite crystallization: Challenges for future design.

Sci Total Environ 2019 Jan 5;648:1244-1256. Epub 2018 Aug 5.

Department of Chemical & Materials Engineering, The University of Auckland, New Zealand.

Phosphorous (P) is an essential element for living organisms and is predicted to be depleted within the next 100 years. Across the world, significant phosphorous losses due to its low utilization efficiency become one of the main reasons for water pollution. Struvite crystallization has been found to be a promising recovery technique to mitigate these problems, as the recovered precipitate can be used as a slow release fertilizer or raw material for chemical industry. Read More

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January 2019
4 Reads

Staghorn calculus.

J Med Imaging Radiat Oncol 2018 Oct;62 Suppl 1:111

Department of Radiology, Concord Repatriation General Hospital, Concord, New South Wales, Australia.

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October 2018

Composition and spatial distribution of elements and isotopes of a giant human bladder stone and environmental implications.

Sci Total Environ 2019 Feb 8;650(Pt 1):835-846. Epub 2018 Sep 8.

School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China; School of Life Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China. Electronic address:

The composition and spatial distribution of minerals, trace elements, as well as carbon and nitrogen isotopes from the outer crust to inner nucleus of a 20-year old giant human bladder stone comprising thirteen layers were intensively investigated. Calcium oxalate monohydrate (COM) was found to concentrate in the inner and middle layers, struvite was concentrated in middle and outer layers, and fluorapatite occurred in almost all layers. The spatial distribution of minerals has the potential to provide preliminary knowledge regarding the long-term urine composition, or even the physiological condition of the patient. Read More

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February 2019
3 Reads

Quantified water intake in laboratory cats from still, free-falling and circulating water bowls, and its effects on selected urinary parameters.

J Feline Med Surg 2018 Oct 10:1098612X18803753. Epub 2018 Oct 10.

1 Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Tennessee, Knoxville, TN, USA.

Objectives The study objectives were to determine if method of water presentation (still [S], circulating [C] or free-falling [FF] bowl systems) influences daily water consumption in cats in a controlled environment, and whether differences in water intake affect urine relative super saturation (RSS) for calcium oxalate and struvite, urine specific gravity (USG), urine osmolality (Uosmol) and urine volume. Methods Sixteen healthy laboratory cats fed a dry diet were individually housed with urine collection systems. Each cat underwent a randomized 2 week crossover period with all bowl systems allowing a 1 week acclimation period between each crossover. Read More

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October 2018
4 Reads

Recovery of phosphorus and nitrogen from human urine by struvite precipitation, air stripping and acid scrubbing: A pilot study.

Chemosphere 2018 Dec 31;212:1030-1037. Epub 2018 Aug 31.

University of Washington, Department of Civil & Environmental Engineering, 616 NE Northlake Place, Seattle, WA 98195, USA; GMB, Dalwagenseweg 51, 4043 MT Opheusden, The Netherlands. Electronic address:

Sustainable and closed-loop nutrient cycling require the recovery of valuable resources from wastewater. Resource recovery from diluted wastewater streams is limited by diluted concentrations and unfavorable reaction kinetics. In comparison, source separated urine allows resource recovery from a highly concentrated nutrient stream, resulting in a more sustainable and efficient recovery practice. Read More

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December 2018
8 Reads

Comparing the effects of three in situ methods on nitrogen loss control, temperature dynamics and maturity during composting of agricultural wastes with a stage of temperatures over 70 °C.

J Environ Manage 2019 Jan 29;230:119-127. Epub 2018 Sep 29.

College of Resource and Environmental Science, China Agricultural University, Beijing, China; Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Beijing, China.

The study investigated the effects of three in situ methods for controlling nitrogen loss and maturity with different mechanisms: struvite-based addition (KHPO and MgO, MP), woody peat addition (WP) and intermittent aeration (IA), during composting of vegetable waste (cucumber vine) with temperature over 70 °C to inactivate potential viral pathogens. The experiment was conducted in a 200 L pilot-scale composting system, with which temperature and ammonia emission were recorded in real time, and solid samples were collected and analyzed during the process. The results indicated that the methods of MP and IA reduced the total nitrogen loss by 27. Read More

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January 2019
1 Read

Formation of struvite from agricultural wastewaters and its reuse on farmlands: Status and hindrances to closing the nutrient loop.

J Environ Manage 2019 Jan 24;230:1-13. Epub 2018 Sep 24.

Aarhus Institute of Advanced Studies, Aarhus University, Høegh-Guldbergs, Gade 6B, DK-8000, Aarhus C, Denmark; Department of Bioscience, Aarhus University, Aarhus, 8000C, Denmark. Electronic address:

To meet the needs of a fast growing global population, agriculture and livestock production have been intensified, resulting in environmental pollution, climate change, and soil health declining. Closing the nutrient circular loop is one of the most important sustainability factors that affect these issues. Apart from being a serious environmental issue, the discharge of N and P via agricultural wastewater is also a major factor that disturbs nutrient cycling in agriculture. Read More

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January 2019
5 Reads

Quantitative Evaluation of an Integrated System for Valorization of Wastewater Algae as Bio-oil, Fuel Gas, and Fertilizer Products.

Environ Sci Technol 2018 Sep 26. Epub 2018 Sep 26.

Algal systems have emerged as a promising strategy for simultaneous treatment and valorization of wastewater. However, further advancement and real-world implementation are hindered by the limited knowledge on the full energetic and nutrient product potentials of such systems and the corresponding value of these products. In this work, an aqueous-based system for the conversion of wastewater-derived algae and upgrading of crude products was designed and demonstrated. Read More

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September 2018
2 Reads

Long-term outcomes of ultrasound-guided percutaneous nephrolithotomy in patients with solitary kidneys: a single-center experience.

World J Urol 2018 Sep 25. Epub 2018 Sep 25.

Department of Urology, School of Clinical Medicine, Beijing Tsinghua Changgung Hospital, Tsinghua University, No. 168 Litang Road, Changping District, Beijing, 102218, China.

Purpose: To report our experience with total ultrasound-guided percutaneous nephrolithotomy (PCNL) in the management of patients with solitary kidney, and evaluate the safety and feasibility of this technique.

Materials And Methods: Between October 2014 and December 2016, 48 patients with solitary kidneys underwent total ultrasound-guided PCNL at our institution. Stone-free rate (SFR), auxiliary procedures, and complications were recorded. Read More

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September 2018
11 Reads

Comparison of different K-struvite crystallization processes for simultaneous potassium and phosphate recovery from source-separated urine.

Sci Total Environ 2019 Feb 19;651(Pt 1):787-795. Epub 2018 Sep 19.

Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, PR China.

Controlled K-struvite crystallization is an attractive technology to simultaneously recover phosphate and potassium from urine. This study investigated the recovery of phosphate and potassium from source-separated urine by K-struvite crystallization using different use models of low-grade MgO (LG-MgO): LG-MgO alone (model 1, M1), LG-MgO plus phosphorus acid (model 2, M2), and a pre-formed stabilizing agent by adding LG-MgO plus phosphorus acid (model 3, M3). Results showed that 100% phosphate and 25% K could be recovered from urine by M1. Read More

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February 2019
3 Reads

Size, shape, and identity of surface crystals and their relationship to sensory perception of grittiness in soft smear-ripened cheeses.

J Dairy Sci 2018 Dec 20;101(12):10720-10732. Epub 2018 Sep 20.

Department of Geology, University of Vermont, Burlington 05405.

Soft smear-ripened cheeses undergo extensive surface crystallization and radial demineralization of calcium, magnesium, and phosphorus, which likely contributes to radial softening during ripening. Furthermore, anecdotal evidence suggests that grittiness is a common characteristic of smear-ripened cheeses. The primary aims of the present study were to evaluate the intensity of perceived grittiness while assessing other key sensory attributes in US artisanal and European protected designation of origin smear-ripened cheeses, and to relate perceived grittiness to the size, shape, and identity of crystals present in the cheese surface smears. Read More

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December 2018

Phosphorus recovery through adsorption by layered double hydroxide nano-composites and transfer into a struvite-like fertilizer.

Water Res 2018 Nov 4;145:721-730. Epub 2018 Sep 4.

Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong. Electronic address:

Phosphorus (P) recovery from waste streams is attracting more attention due to the twin problems of aquatic eutrophication and global phosphorus scarcity. Layered double hydroxide mineral materials are promising phosphate adsorbents due to their excellent anion-exchange abilities and large surface area. In this study, the adsorption isotherms estimated the saturation capacity of calcined layered double hydroxide (LDH) nano-composites for phosphate as 100. Read More

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November 2018
9 Reads

Phosphorus Recovery by Methods Beyond Struvite Precipitation.

Water Environ Res 2018 Sep;90(9):840-850

  Unintentional phosphate precipitation at water resource recovery facilities (WRRFs) causes operation and maintenance challenges. With global phosphorus (P) scarcity looming and receiving water eutrophication caused by excess discharges of P, intentional P recovery at WRRFs has been gaining traction. To date, struvite recovery as slow release fertilizer has been the focus of P recovery. Read More

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September 2018

Fractionating magnesium ion from seawater for struvite recovery using electrodialysis with monovalent selective membranes.

Chemosphere 2018 Nov 19;210:867-876. Epub 2018 Jul 19.

Cluster for Bio-engineering, Department of Microbial and Molecular Systems, Faculty of Engineering Technology, KU Leuven Campus Bruges, Spoorwegstraat 12, 8200 Brugge, Belgium. Electronic address:

As the consumption of global phosphorus reserves accelerates, recovering phosphorus as struvite (MgNHPO·6HO) from wastewater is an important option for phosphorus recycling. However, magnesium source is one of the major limiting factors for struvite recovery. In this work, different from previous studies where seawater was used directly as magnesium source in struvite precipitation, an electrodialysis stack equipped with monovalent selective cation-exchange membranes was designed to fractionate Mg from seawater for struvite recovery. Read More

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November 2018
4 Reads

Enhancing soluble phosphate concentration in sludge liquor by pressurised anaerobic digestion.

Water Res 2018 Nov 31;145:660-666. Epub 2018 Aug 31.

Advanced Water Management Centre (AWMC), Level 4, Gehrmann Bldg. (60), Research Road, University of Queensland, Brisbane, Queensland, 4072, Australia. Electronic address:

Recovery of phosphate from wastewater is challenging, with one of the best opportunities being recovery from sludge anaerobic digestion liquor, as struvite. However, this is limited by the proportion of total phosphorous which is soluble, due to in-digester metal ion precipitation. High-pressure anaerobic digestion may enable enhanced phosphate solubility (and hence recovery potential), without the use of added acid, due to an increased liquid phase CO concentration. Read More

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November 2018
8 Reads

Optimizing the configuration of integrated nutrient and energy recovery treatment trains: A new application of global sensitivity analysis to the generic nutrient recovery model (NRM) library.

Bioresour Technol 2018 Dec 28;269:375-383. Epub 2018 Aug 28.

modelEAU, Département de génie civil et de génie des eaux, Université Laval, 1065, avenue de la Médecine, Québec G1V 0A6, QC, Canada; CentrEau, Centre de recherche sur l'eau, Université Laval, 1065 Avenue de la Médecine, Québec, QC G1V 0A6, Canada.

This paper describes the use of global sensitivity analysis (GSA) for factor prioritization in nutrient recovery model (NRM) applications. The aim was to select the most important factors influencing important NRM model outputs such as biogas production, digestate composition and pH, ammonium sulfate recovery, struvite production, product purity, particle size and density, air and chemical requirements, scaling potential, among others. Factors considered for GSA involve: 1) input waste stream characteristics, 2) process operational factors, and 3) kinetic parameters incorporated in the NRMs. Read More

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December 2018

[Etiological factors for calculus-associated seminal vesiculitis: Analysis of calculus composition in 6 cases].

Zhonghua Nan Ke Xue 2018 Feb;24(2):128-132

Center of Urology and Nephrology, Ningbo First Hospital, Zhejiang University, Ningbo, Zhejiang 315010, China.

Objective: To explore the etiological factors for calculus-associated seminal vesiculitis by analyzing the composition of seminal vesicle calculus samples.

Methods: This retrospective study included 6 cases of recurrent hematospermia diagnosed with seminal vesicle calculus by non-contrast pelvic CT. The patients were aged 28 to 69 years, with persistent or recurrent hematospermia for 3 months to 6 years, and 5 of them with a history of acute urethritis. Read More

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February 2018
5 Reads

Biochemical composition of salivary stones in relation to stone- and patient-related factors.

Med Oral Patol Oral Cir Bucal 2018 Sep 1;23(5):e540-e544. Epub 2018 Sep 1.

Department of Periodontology and Oral Biochemistry, Academic Centre for Dentistry, Amsterdam (ACTA), room 12N-37, Gustav Mahlerlaan 3004, 1081 LA Amsterdam, The Netherlands,

Background: Salivary stones are calcified structures most often found in the main duct of the submandibular or parotid salivary gland. They contain of a core surrounded by laminated layers of organic and inorganic material.

Material And Methods: Submandibular and parotid sialoliths (n=155) were collected at the department of Oral and Maxillofacial surgery of a general hospital between February 1982 and September 2012. Read More

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September 2018

Morphological and micro-tomographic study on evolution of struvite in synthetic urine infected with bacteria and investigation of its pathological biomineralization.

PLoS One 2018 14;13(8):e0202306. Epub 2018 Aug 14.

Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, Karnataka, India.

Pathological biomineralization in the urinary system leads to urolithiasis. Formation of kidney stones involves a series of events during which they undergo morphological and mineralogical changes. We investigated the mineralization of biogenic struvite (in vitro) and examined the transformation of distinct interior and exterior structure of struvite. Read More

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Review of global sanitation development.

Environ Int 2018 Nov 10;120:246-261. Epub 2018 Aug 10.

Department of Geography, Faculty of Social Sciences, University of Victoria, PO Box 1700 STN CSC, Victoria, BC V8W 2Y2, Canada.

The implementation of the United Nations (UN) Millennium Development Goals (MDGs) and Sustainable Development Goals (SDGs) has resulted in an increased focus on developing innovative, sustainable sanitation techniques to address the demand for adequate and equitable sanitation in low-income areas. We examined the background, current situation, challenges, and perspectives of global sanitation. We used bibliometric analysis and word cluster analysis to evaluate sanitation research from 1992 to 2016 based on the Science Citation Index EXPANDED (SCI-EXPANDED) and Social Sciences Citation Index (SSCI) databases. Read More

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November 2018

A rare reason in a child with feeding intolerance: Intravaginal struvite stone.

Turk J Pediatr 2018 ;60(1):86-88

Departments of Pediatrics, Adnan Menderes University Faculty of Medicine, Aydın, Turkey.

Tokgöz Y, Erdem AO, Özbey BC, Terlemez S. A rare reason in a child with feeding intolerance: Intravaginal struvite stone. Turk J Pediatr 2018; 60: 86-88. Read More

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January 2018
9 Reads

Simultaneous removal of nitrogen and phosphorus by magnesium-modified calcium silicate core-shell material in water.

Ecotoxicol Environ Saf 2018 Nov 8;163:656-664. Epub 2018 Aug 8.

School of Chemistry and Materials Science, Heilongjiang University, Key Laboratory of Chemical Engineering Process & Technology for High-efficiency Conversion, Harbin 150080, China. Electronic address:

In this study, a new core-shell material (CMCS) is prepared with magnesium oxide (MgO) around calcium silicate hydrate (CSH), and CSH is prepared by SiO from the red mud. The CMCS simultaneously removes ammonia nitrogen (NH) and phosphate (PO) by chemical precipitation and it can achieve recovery of nitrogen and phosphorus. The removal process of NH and PO is as follows. Read More

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November 2018
7 Reads

A first Mn member in the struvite morphotropic series, CsMn(HO)(PO): hydrothermal synthesis, crystal structure and interconnections within the family of related phosphates.

Acta Crystallogr C Struct Chem 2018 08 19;74(Pt 8):936-943. Epub 2018 Jul 19.

M. V. Lomonosov Moscow State University, Leninskye Gory 1, Moscow 119991, Russian Federation.

Caesium manganese hexahydrate phosphate, CsMn(HO)(PO), was synthesized under hydrothermal conditions. Its crystal structure was determined from single-crystal X-ray diffraction data. The novel phase crystallizes in the hexagonal space group P6mc and represents the first manganese member in the struvite morphotropic series, AM(HO)(TO). Read More

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August 2018
2 Reads

A critical review on ammonium recovery from wastewater for sustainable wastewater management.

Bioresour Technol 2018 Nov 25;268:749-758. Epub 2018 Jul 25.

School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China.

The growing global population's demand for ammonium has triggered an increase in its supply, given that ammonium plays a crucial role in fertilizer production for the purpose of food security. Currently, ammonia used in fertilizer production is put through what is known as the industrial Haber Bosch process, but this approach is substantially expensive and requires much energy. For this reason, looking for effective methods to recover ammonium is important for environmental sustainability. Read More

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November 2018
14 Reads

Raman chemical imaging, a new tool in kidney stone structure analysis: Case-study and comparison to Fourier Transform Infrared spectroscopy.

PLoS One 2018 3;13(8):e0201460. Epub 2018 Aug 3.

University of Liege (ULiege), CIRM, VibraSante Hub, Laboratory of Pharmaceutical Analytical Chemistry, Liège, Belgium.

Background And Objectives: The kidney stone's structure might provide clinical information in addition to the stone composition. The Raman chemical imaging is a technology used for the production of two-dimension maps of the constituents' distribution in samples. We aimed at determining the use of Raman chemical imaging in urinary stone analysis. Read More

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August 2018
2 Reads

Vivianite as the main phosphate mineral in digested sewage sludge and its role for phosphate recovery.

Water Res 2018 11 20;144:312-321. Epub 2018 Jul 20.

Dept. Biotechnology, Delft University of Technology, Van der Maasweg 9, 2629, HZ, Delft, The Netherlands.

Phosphate recovery from sewage sludge is essential in a circular economy. Currently, the main focus in centralized municipal wastewater treatment plants (MWTPs) lies on struvite recovery routes, land application of sludge or on technologies that rely on sludge incineration. These routes have several disadvantages. Read More

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November 2018
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Antibacterial and in vitro growth inhibition study of struvite urinary stones using Oxalis corniculata Linn. leaf extract and its biofabricated silver nanoparticles.

Recent Pat Drug Deliv Formul 2018 Jul 23. Epub 2018 Jul 23.

Department of Chemistry, School of Advanced Sciences, VIT University, Vellore-632014. India.

Background: Herbal drugs are gaining exponential scientific recognition due to their distinct advantages. In the last 2-3 decades, a gradual increase in worldwide patents on herbal nano-formulations has been noted to address the solubility and bioavailability issues of phytoceuticals. Struvite or ammonium magnesium phosphate hexahydrate (NH4MgPO4. Read More

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July 2018
4 Reads

Urinary tract infection's etiopathogenic role in nephrolithiasis formation.

Med Hypotheses 2018 Sep 5;118:34-35. Epub 2018 Jun 5.

Urology Department of Son Espases University Hospital, Palma de Mallorca, Spain.

Urolithiasis has a high prevalence and recurrence rate, especially in developed countries, and is a major public health issue with a high socioeconomic cost. There are multiple causes of urolithiasis, including urinary tract infection (UTI). Infection stones (mainly composed of struvite) are associated with renal infections by urease-producing bacteria. Read More

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September 2018
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Selection of cost-effective magnesium sources for fluidized struvite crystallization.

J Environ Sci (China) 2018 Aug 11;70:144-153. Epub 2017 Dec 11.

Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China. Electronic address:

Struvite crystallization has been considered a promising approach to recover phosphorus from wastewater. However, its practical application is limited, probably because of the high cost of magnesium (Mg). In this study, a comprehensive economic analysis was conducted using five Mg sources (MgCl, MgSO, MgO, Mg(OH), and bittern) during the operation of a pilot-scale fluidized bed reactor (FBR), using swine wastewater as the case matrix. Read More

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August 2018
7 Reads