The use of biochar-amended composting to improve the humification and degradation of sewage sludge

被引：204
作者：
Zhang, Jining [1 ,2 ]
Lu, Fan [1 ,2 ]
Shao, Liming [2 ,3 ]
He, Pinjing [2 ,3 ]
机构：
[1] Tongji Univ, State Key Lab Pollut Control & Resource Reuse, Shanghai 200092, Peoples R China
[2] Tongji Univ, Inst Waste Treatment & Reclamat, Shanghai 200092, Peoples R China
[3] Minist Housing & Urban Rural Dev PR China MOHURD, Ctr Technol Res & Training Household Waste Small, Beijing, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2014年 / 168卷
关键词：
Water-extractable organic matter; Fluorescence excitation and emission matrix; FT-IR; SEM; Humus substances; DISSOLVED ORGANIC-MATTER; BLACK CARBON; SOIL AMENDMENTS; NITROGEN LOSS; WASTE; MANURE; ASH;
D O I：
10.1016/j.biortech.2014.02.080
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
Wood biochar (6%, 12% and 18% of fresh sludge weight) adding to a sludge-and-straw composting system was investigated to assess the potential of biochar as a composting amendment. Organic degradation efficiency, temporal humification profile of the water-extractable organic fraction and solid organic matter, through spectroscopic, microscopic and elementary analysis were monitored. Fluorescent excitation and emission matrix indicated that concentrations of aqueous fulvic-acid-like and humic-acid-like compounds were, respectively, 13-26% and 15-30% higher in the biochar-amended treatments, than those in the control without biochar-amended. On the first day of sludge aerobic incubation, the presence of biochar resulted in increased oxygen uptake rates of 21-37% due to its higher nano-porosity and surface area. SEM indicated that, in the biochar-amended sludge, the dense microstructure on the sludge surface disintegrated into fragments with organic fraction degraded and water lost. Results indicated that 12-18% w/w addition of wood biochar to sludge composting was recommended. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：252 / 258
页数：7
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