Biochar production using biogas residue and their adsorption of ammonium nitrogen and chemical oxygen demand in wastewater

文献类型： 外文期刊

第一作者： Wang, Mengyao

作者： Wang, Mengyao;Wang, Gaihong;Qian, Lina;Yong, Xiaoyu;Jia, Honghua;Zhou, Jun;Wang, Yajun;An, Wei

作者机构：

关键词： Biogas residue; Biochar; Ammonia nitrogen; COD; Adsorption

期刊名称：BIOMASS CONVERSION AND BIOREFINERY （ 影响因子：2.602； ）

ISSN： 2190-6815

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页码：

收录情况： SCI

摘要： Modified biochars prepared from straw, pig manure, and chicken manure biogas residues were used to adsorb and remove ammonium nitrogen (NH4+-N) and chemical oxygen demand (COD) in wastewater. The results showed that at 400-600 degrees C, the adsorption performance of the biogas residue biochars increased with pyrolysis temperature, reaching the maximum at 550 degrees C. Biochar from chicken manure biogas residue exhibited strong NH4+-N (20.3%) and COD (28.1%) adsorption capacity. Through FeCl3 modification, the Fe content on the surface of the biochar increased, and the adsorption data of the modified biochar conformed well to the pseudo-second-order kinetics and Langmuir model, and the reaction was dominated by chemical adsorption. The fitting calculation revealed that the FeCl3-modified biochar from chicken manure biogas residue showed maximum NH4+-N (55.29 mg/g) and COD (186.24 mg/g) absorption capacity. These results indicated that modified biochar from biogas residue could have potential application for the treatment and recycling of biogas slurry.

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