Struvite recovery from anaerobically digested waste-activated sludge: A short review

IF 0.7 4区材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING International Journal of Materials Research Pub Date : 2023-07-31 DOI:10.1557/s43578-023-01108-4

Benton Onyango Otieno, Charmaine Kgomotso Funani, Selebogo Mervyn Khune, J. Kabuba, P. Osifo

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引用次数: 2

Abstract

Effective treatment of waste streams such as municipal waste-activated sludge (WAS) presents an opportunity for energy and nutrient recovery, water reclamation, and mitigation of climate change. WAS is a waste product of the activated sludge treatment (AST) process widely used for municipal wastewater. Currently, WAS treatment and disposal account for up to 50% of the total operation cost and 40% of the total greenhouse gas emissions from wastewater treatment plants. Anaerobic digestion (AD) is usually preferred for WAS treatment since it is more economical compared to other existing technologies. The decomposition of sludge during AD releases nutrients, which are then discharged in the anaerobic effluent, polluting recipient water bodies and increasing the nutrient burden. The nutrients, mainly nitrogen (N), phosphorus (P), and potassium (K), can be crystallised into struvite (magnesium ammonium phosphate, NH4MgPO4.6H2O) with numerous agricultural applications as fertilisers. The present review focusses on struvite recovery from anaerobically digested WAS and its potential application for crop production.

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厌氧消化废物活性污泥中鸟粪石的回收研究进展

城市垃圾活性污泥(WAS)等废物流的有效处理为能源和养分回收、水回收和减缓气候变化提供了机会。WAS是广泛应用于城市污水的活性污泥处理(AST)工艺的废弃物。目前，污水处理厂的处理和处置成本占总运营成本的50%，占温室气体排放总量的40%。厌氧消化(AD)通常是WAS处理的首选方法，因为与其他现有技术相比，厌氧消化更经济。AD过程中污泥的分解释放出营养物质，这些营养物质随后在厌氧废水中排放，污染了接收水体，增加了营养负担。营养物质，主要是氮(N)，磷(P)和钾(K)，可以结晶成鸟粪石(磷酸铵镁，NH4MgPO4.6H2O)，作为肥料在许多农业应用中。本文综述了从WAS厌氧消化中回收鸟粪石及其在作物生产中的潜在应用。

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来源期刊

International Journal of Materials Research 工程技术-冶金工程

CiteScore

1.30

自引率

12.50%

发文量

119

审稿时长

6.4 months

期刊介绍： The International Journal of Materials Research (IJMR) publishes original high quality experimental and theoretical papers and reviews on basic and applied research in the field of materials science and engineering, with focus on synthesis, processing, constitution, and properties of all classes of materials. Particular emphasis is placed on microstructural design, phase relations, computational thermodynamics, and kinetics at the nano to macro scale. Contributions may also focus on progress in advanced characterization techniques. All articles are subject to thorough, independent peer review.