Article
Engineering, Environmental
Xiongjian Chen, Yanchao Jin, Zijing Zhou, Peiwen Huang, Xiao Chen, Rui Ding, Riyao Chen
Summary: In this study, nutrient recovery and wastewater disinfection were successfully achieved using Mg-coconut shell carbon (Mg-CSC). The results showed effective removal of E.coli and high recovery rates under different conditions. Mg-CSC composites demonstrated satisfactory performances in real aquaculture wastewater treatment.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Aleksandra Bogdan, Ciaran O' Donnell, Ana Alejandra Robles Aguilar, Ivona Sigurnjak, Niamh Power, Evi Michels, Joe Harrington, Erik Meers
Summary: The study evaluated the impact of five fertilizers recovered from municipal wastewater on perennial ryegrass dry matter (DM) and phosphorus concentration. Results showed significant differences among the fertilizers at the lowest P dose, but less variation at higher doses. Struvite, ash, and iron phosphate exhibited steady P release patterns, while one type of ash showed delayed release followed by an increase. Monitoring P uptake for at least four months during perennial ryegrass growth was found to be necessary, with seven months being the optimal period for reaching the full capacity of slow-release P fertilizers.
Article
Crystallography
Atef Korchef, Salwa Abouda, Imen Souid
Summary: The goal of this study was to optimize the crystallization of struvite, a compound that can recover phosphorus and ammonium in the presence of magnesium, under turbulent solution flow conditions. The experiments showed that increasing the stirring rate to 500 rpm from 200 rpm accelerated the precipitation of struvite, improved the phosphorus removal efficiency, and obtained larger crystals.
Article
Engineering, Environmental
Pengfei Qin, Helong Hui, Wenli Song, Hao Wu, Songgeng Li
Summary: A high P-availability glass phosphate fertilizer was manufactured from municipal sewage sludge ash (SSA) using a conventional method for fused calcium magnesium phosphate fertilizer (FCMP). The P-availability of the SSA-made FCMP was examined by varying the amount of alkali earth metals (MO, CaO and MgO) added. Various techniques were used to analyze the structure of the SSA-made FCMP, and it was found that the depolymerization of the silicate glass network due to MO addition was the main factor contributing to the improvement of P-availability.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Plant Sciences
Aleksandra Bogdan, Ana Alejandra Robles Aguilar, Olivier Nys, Evi Michels, Erik Meers
Summary: This study investigated the P availability of recycled phosphorus fertilizers through eleven different chemical P extractions. The results showed that STRSL and STRLQ had higher P concentrations extracted, while ASH2 and FeP had highly variable P concentrations. The plant P uptake efficiency followed the order: STRSL > STRLQ > ASH1 > FeP > ASH2.
JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION
(2023)
Article
Engineering, Environmental
Xiaolong Yu, Yousuke Nakamura, Masanari Otsuka, Daisuke Omori, Shinsuke Haruta
Summary: A new system for recovering phosphorus from incinerated sewage sludge ash (ISSA) was proposed in this study, with laboratory tests showing high recovery rates and product purity. The system proved to meet fertilizer standards and be cost-effective, providing a practical alternative for phosphorus recovery.
Article
Green & Sustainable Science & Technology
Shuaishuai Li, Wei Zeng, Ziyan Ren, Ziyue Jia, Xiaojing Peng, Yongzhen Peng
Summary: Phosphorus recovery from sewage sludge ash was successfully achieved through acid extraction and adsorption by acid-resistant adsorbent, resulting in 6.7 times enrichment of phosphorus after 8 cycles. The recovered phosphorus as struvite met the utili
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Environmental
Moh Moh Thant Zin, Dong-Jin Kim
Summary: This study explores the use of designed biochar for nutrient recovery from nutrient-rich wastewater as struvite, with high recovery rates of both P and N achieved. Mg-biochars demonstrate higher struvite selectivity and utilize adsorption, precipitation, and cation-exchange mechanisms for nutrient recovery.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Agronomy
Ciaran O'Donnell, Denise Barnett, Joe Harrington, Niamh Power
Summary: Phosphorus (P) is an essential nutrient for crop growth and food production. However, the use of mineral P fertilisers derived from finite phosphate ore raises concerns about long-term sustainability. To address this issue, technologies have been developed to recover P from municipal wastewater treatment plants, one of which is struvite. Field trials on perennial ryegrass were conducted to analyse the fertilisation value of recovered struvite, and the research found that it not only increased soil P levels but also provided additional benefits.
Article
Engineering, Chemical
Zenah Bradford-Hartke, Amir Razmjou, Leslie Gregory
Summary: The depletion of phosphorus globally has led to it being a critical element for sustainable agriculture, prompting significant research into recovering and recycling this non-renewable resource. Cheaper alternatives to commercial magnesium sources, such as seawater and concentrates from RO desalination plants, are being sought for phosphorus recovery. The use of alternative magnesium sources can affect the efficiency of phosphorus removal, particle size, rate constant, morphology, and purity of struvite precipitated from synthetic solutions.
Article
Soil Science
Chunhao Gu, Qiuhong Zhou, Roland D. Cusick, Andrew J. Margenot
Summary: The study evaluated the potential effects of STP methods and soil properties on STP values for soils with residual struvite, finding significantly higher dissolution of struvite in acidic soils with low clay content compared to high clay content. This indicates the need to account for the impacts of residual struvite on measured STP values.
Review
Environmental Sciences
Asamin Yesigat, Abebe Worku, Addisu Mekonnen, Wookeun Bae, Gudina Legese Feyisa, Shetie Gatew, Jing-Long Han, Wenzong Liu, Aijie Wang, Awoke Guadie
Summary: Currently, there is a need to shift towards resource recycling and reuse due to the depletion of natural resources and contamination of the surrounding environment. Phosphorus (P) is a model nutrient that is facing depletion and causing environmental degradation, prompting the search for solutions. One viable option is the recovery of P as struvite from wastewater, with K-struvite being a promising approach. However, there is a lack of information regarding the crystallization of K-struvite. This study provides insights into the recovery of K-struvite from wastewater as a slow-release fertilizer.
ENVIRONMENTAL RESEARCH
(2022)
Article
Horticulture
Carolina Mancho, Sergio Diez-Pascual, Juan Alonso, Mar Gil-Diaz, Pilar Garcia-Gonzalo, M. Carmen Lobo
Summary: The global rise in population has led to an increased demand for high-quality food production. Phosphorus (P) is an essential element for plant growth, but its supply from phosphate rock is becoming scarce and expensive. Alternative sources of P, such as struvite (MgNH4PO4·6H2O) from wastewater, are being studied. This research evaluated the efficiency of struvite as a fertilizer for lettuce production and found that it had similar biomass results to conventional P fertilizers.
Article
Engineering, Environmental
Halyna Kominko, Katarzyna Gorazda, Zbigniew Wzorek
Summary: This study evaluates the potential of using dried sewage sludge in the manufacture of organo-mineral fertilizers, which were developed for maize and sunflower crops with optimized compositions. The fertilizers contained over 20% total nutrient content and met the requirements for heavy metal content, offering a sustainable waste management solution in line with the circular economy.
Article
Environmental Sciences
Javier Canas, Silvia alvarez-Torrellas, Blanca Hermana, Juan Garcia
Summary: Environmental legislation and potential nutrient recovery drive the adoption of advanced treatment technologies for biosolids waste management. This study focused on phosphorus recovery from sewage sludge using wet oxidation. The wet oxidation process achieved high removal of organic matter (up to 85% COD) and total solids (up to 75%) at elevated temperature and pressure. Both liquid and solid fractions contained high amounts of phosphorus that can be recovered. Phosphorus was successfully recovered from the liquid effluent through chemical precipitation as struvite, with a recovery rate exceeding 95%. Acid leaching of the solid fraction resulted in a phosphorus recovery rate of up to 60%, with all extracted phosphorus in the form of orthophosphate.