Phosphorus recovery from biogas fermentation liquid by Ca-Mg loaded biochar

Journal of Environmental Sciences (China)
Ci FangYing-cai Wang

Abstract

Shortage in phosphorus (P) resources and P wastewater pollution is considered as a serious problem worldwide. The application of modified biochar for P recovery from wastewater and reuse of recovered P as agricultural fertilizer is a preferred process. This work aims to develop a calcium and magnesium loaded biochar (Ca-Mg/biochar) application for P recovery from biogas fermentation liquid. The physico-chemical characterization, adsorption efficiency, adsorption selectivity, and postsorption availability of Ca-Mg/biochar were investigated. The synthesized Ca-Mg/biochar was rich in organic functional groups and in CaO and MgO nanoparticles. With the increase in synthesis temperature, the yield decreased, C content increased, H content decreased, N content remained the same basically, and BET surface area increased. The P adsorption of Ca-Mg/biochar could be accelerated by nano-CaO and nano-MgO particles and reached equilibrium after 360min. The process was endothermic, spontaneous, and showed an increase in the disorder of the solid-liquid interface. Moreover, it could be fitted by the Freundlich model. The maximum P adsorption amounts were 294.22, 315.33, and 326.63mg/g. The P adsorption selectivity of Ca-Mg/biochar could not b...Continue Reading

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Citations

May 2, 2016·Bioresource Technology·Xiao-Fei TanJiang Li
Oct 27, 2016·The Science of the Total Environment·Yuanyao YeHui Jia
May 31, 2017·Environmental Technology·Hanjiang XuYudong Zhang
Nov 29, 2017·Environmental Science and Pollution Research International·Qianqian YinZhenghui Zhao
Nov 2, 2017·Environmental Science and Pollution Research International·Lulu ZhaoYing Zhang
Apr 6, 2019·Journal of Environmental Quality·Ying-Heng FeiTangfu Xiao
Aug 14, 2020·Environmental Science and Pollution Research International·Guiwei LiangJing Zhao
Mar 22, 2021·The Science of the Total Environment·Muhammad Bilal ShakoorShaohua Chen
May 5, 2021·The Science of the Total Environment·Hasara SamaraweeraTodd Mlsna

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