title: Improving anaerobic digestion of easy-acidification substrates by promoting buffering capacity using biochar derived from vermicompost.
abstract: Acid-buffering of VCBC and VC was evaluated using 4 VFAs, and their application on anaerobic digestion of CM and KW was investigated. Results indicated acid-buffering capacity of VCBC to acetic, propionic, butyric, and valeric acid was 2.5, 1.1, 1.9 and 1.6-fold higher comparing with VC. CM digestion was not initiated at higher organic loading of 50gTS/kg, while it worked well with 5.0% VCBC or VC. KW was not digested even though VC or VCBC was increased to 15% and 20%. However, KW digestion can be alleviated with increasing VCBC or VC proportion, in which the alleviation by VCBC was better than VC. Average VFAs concentration during CM digestion with VC was 4077.7mg/L comparing with 2835.8mg/L of VCBC, and biogas release was delayed for 10-days accompanying rapid pH decrease in CM digestion with VC, which reflected acid-buffering of biochar played a crucial role on improving anaerobic digestion.
authors.affiliation: Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China; Rural Environment Protection Engineering & Technology Center of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China.
authors.forename: Dou
authors.initials: D
authors.lastname: Wang
authors.affiliation: Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China; Rural Environment Protection Engineering & Technology Center of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China.
authors.forename: Jing
authors.initials: J
authors.lastname: Ai
authors.affiliation: Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China; Rural Environment Protection Engineering & Technology Center of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China. Electronic address: fishensjtu@gmail.com.
authors.forename: Fei
authors.initials: F
authors.lastname: Shen
authors.affiliation: Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China; Rural Environment Protection Engineering & Technology Center of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China.
authors.forename: Gang
authors.initials: G
authors.lastname: Yang
authors.affiliation: Rural Environment Protection Engineering & Technology Center of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China.
authors.forename: Yanzong
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China; Rural Environment Protection Engineering & Technology Center of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China.
authors.forename: Shihuai
authors.initials: S
authors.lastname: Deng
authors.affiliation: Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China; Rural Environment Protection Engineering & Technology Center of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China.
authors.forename: Jing
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China; Rural Environment Protection Engineering & Technology Center of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China.
authors.forename: Yongmei
authors.initials: Y
authors.lastname: Zeng
authors.affiliation: Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China; Rural Environment Protection Engineering & Technology Center of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China.
authors.forename: Chun
authors.initials: C
authors.lastname: Song
mesh_terms: D000693:Anaerobiosis; D056804:Biofuels; D002021:Buffers; D002606:Charcoal / Q000737:chemistry; D008372:Manure
chemical_list: D056804:Biofuels; D002021:Buffers; D008372:Manure; C540010:biochar; D002606:Charcoal
keywords: Acid-buffering capacity; Anaerobic digestion; Biochar; Chicken manure; Kitchen waste; Vermicompost