Struvite separation from wastewater and its use with sulfur-oxidizing bacteria improves phosphorus utilization in alkaline soil

文献类型： 外文期刊

第一作者： Rehman, Sana ur

作者： Rehman, Sana ur;Raza, Muhammad Ali;Hussain, Sajad;Ijaz, Shahzada Sohail;Fatima, Shroz;Javed, Nabeeha;Irfan, Muhammad;Raza, Muhammad Ali;Siddiqa, Ayesha;Lateef, Muhammad;Khan, Atta ur Rehman;Khan, Rameez Akram;Ahmad, Touqeer

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关键词： alkaline soil; phosphatic fertilizer; slow release; stirring speed; struvite; wastewater

期刊名称：WATER SCIENCE AND TECHNOLOGY （ 影响因子：2.7； 五年影响因子：2.6 ）

ISSN： 0273-1223

年卷期： 2023 年

页码：

收录情况： SCI

摘要： A major portion of phosphatic fertilizer comes from the limiting natural resource, rock phosphate which demands a timely alternative. Struvite, a crystalline mineral of low solubility, is a worthwhile alternative. Evaluation of the local wastewater streams for their ability to precipitate struvite and its capability as phosphatic fertilizer under an alkaline soil environment was studied. Two stirring speeds, a pH range of 8.0-11.0, and a constant molar ratio were used to optimize local wastewater streams for struvite precipitation. Struvite was used in five different combinations to assess the release of phosphorus (P), including control (no P source), single superphosphate, struvite, struvite + sulfur, and rock phosphate with and without inoculation of sulfur-oxidizing bacteria (SOB). For struvite precipitation, low stirring speeds are ideal because the precipitates readily sink to the bottom once they form. Furthermore, the amalgamation of SOB with sulfur significantly improved P use efficiency under alkaline soils through increased phosphorus sources solubility and enabled optimum wheat production due to its low solubility in an alkaline soil condition. Due to its capacity to recycle phosphorus from wastewater, struvite is poised to emerge as a sustainable fertilizer and had an opportunity to capture a share of this expanding market.

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