Coupling Anaerobic Digestion with Pyrolysis for Phosphorus-Enriched Biochar Production from Constructed Wetland Biomass
文献类型： 外文期刊
作者： Yu, Fan 1 ; Li, Xiangming 2 ; Wang, Jiangtao 2 ; Wang, Xutong 2 ; Xiao, Hui 4 ; Wang, Zhi 2 ; Cui, Xiaoqiang 2 ; Hu, Yanjun 1 ; Yan, Beibei 2 ; Chen, Guanyi 2 ;
作者机构： 1.Zhejiang Univ Technol, Inst Energy & Power Engn, Hangzhou 310023, Peoples R China
2.Tianjin Univ, Sch Environm Sci & Engn, Tianjin 300072, Peoples R China
3.Tianjin Univ, Tianjin Key Lab Biomass Waste Utilizat, Tianjin 300072, Peoples R China
4.Tianjin Acad Agr Sci, Tianjin 300192, Peoples R China
5.Tianjin Univ Commerce, Sch Mech Engn, Tianjin 300134, Peoples R China
关键词： anaerobic digestion; pyrolysis; biochar; phosphorus; DGT
期刊名称：ACS SUSTAINABLE CHEMISTRY & ENGINEERING （ 影响因子：9.224； 五年影响因子：9.458 ）
ISSN： 2168-0485
年卷期： 2022 年 10 卷 12 期
页码：
收录情况： SCI
摘要： Coupling anaerobic digestion with pyrolysis (AD-pyrolysis) has drawn increasing attention for the treatment of organic solid wastes. To evaluate the feasibility of AD-pyrolysis to reclaim phosphorus (P) from wetland plants, pyrolysis and AD-pyrolysis were used to dispose of wetland plants at different temperatures (300, 500, and 700 degrees C). The biochars derived from pyrolysis (TBs) showed a high pH and abundant functional groups, while the biochars derived from AD-pyrolysis (ATBs) contained high P (19.52-27.53 mg g(-1)) and ash (35.17-49.88%) contents. Both pyrolysis and AD-pyrolysis effectively reduced the risk of P leaching loss by transforming P into a stable pool. In comparison with pyrolysis, AD-pyrolysis enhanced the formation of the medium-term potential plant-available P (NaOH-P) in biochars (21.50-71.69%) and reduced the residual-P content. The diffusive gradients in thin films (DGT) results confirmed that the addition of AD-pyrolysis-derived biochars greatly increased the available P content in the soil, and DGT-P was positively correlated with the NaOH-P content (r = 0.919, P < 0.01) and the total contents of NaOH-P and NaHCO3-P (r = 0.937, P < 0.01). Therefore, AD-pyrolysis is a promising treatment technique to achieve the upgraded recovery of P in biochar from wetland plants.
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