Insight into the potentiality of big biochar particle as an amendment in aerobic composting of sewage sludge. (September 2019)

• Record Type: Journal Article
• Authors: Du, Jingjing; Zhang, Yuyan; Hu, Bin; Qv, Mingxiang; Ma, Chuang; Wei, Mingbao; Zhang, Hongzhong
• Is Part Of: Bioresource technology. Volume 288(2019)
• Publication Date: 2019-09
• Subjects: Big biochar -- Sewage sludge compost -- Microbial enzyme activity; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2019.121469
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Biochar promoted enhanced the activities of most functional enzymes. Biochar reduced the peak temperature and shortened the thermophilic phase. Biochars inhibited degradation of organic matters. Biochars had higher removal efficiency of total contents of C, N, and S. Abstract: To assess the potential of big biochar as composting amendment, the study was performed on aerobic composting of sewage sludge amended with litchi wood biochar (10% of fresh mixture weight, 20–40 mm) in a 400 L bioreactor system. Physicochemical properties and microbial activities were monitored during the first fermentation process of aerobic compost. Application of big biochar reduced peak temperature and shortened thermophilic phase, but increased the activities of aryl-sulfatase, β-glucosidase, and dehydrogenase, which led to higher removal efficiency of total carbon, nitrogen, and sulphur. Big biochar inhibited degradation of organic matters in composting. Therefore, a comprehensive assessment including physicochemical and microbial properties can help to better understand the effect of big biochar on sewage sludge composting.