Investigation of pre-treatments improving low-temperature anaerobic digestion of waste activated sludge

被引：11
作者：
Chiappero, Marco [1 ]
Demichelis, Francesca [1 ]
Lin, Xuan [2 ]
Liu, Chenxiao [2 ]
Frigon, Dominic [2 ]
Fiore, Silvia [1 ]
机构：
[1] Politecn Torino, DIATI Dept Environm Land & Infrastruct Engn, Corso Duca Abruzzi 24, I-10129 Turin, Italy
[2] McGill Univ, Dept Civil Engn & Appl Mech, Sherbrooke St West 817, Montreal, PQ H3A 0C3, Canada
来源：
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION | 2019年 / 131卷
基金：
加拿大自然科学与工程研究理事会;
关键词：
Anaerobic digestion; Biogas; Low-temperature; Pre-treatment; Semi-Continuous; Waste activated sludge; THERMOCHEMICAL PRETREATMENT; THERMAL PRETREATMENT; SEWAGE-SLUDGE; FOOD WASTE; ALKALINE PRETREATMENT; ECONOMIC-ASSESSMENT; METHANE PRODUCTION; BIOGAS PRODUCTION; WATER; DISINTEGRATION;
D O I：
10.1016/j.psep.2019.08.034
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
This work analyzed the feasibility of pre-treatments to improve the anaerobic digestion (AD) of waste activated sludge (WAS) at 20 degrees C. We investigated different physicochemical pre-treatments (thermal at 115 degrees C, thermo-alkaline at pH 10 and 70 degrees C and ozonation at 190 mg-O-3 L-1) by comparing their performances about COD solubilization and sludge disintegration rate. Best performances were obtained by thermo-alkaline pre-treatment, followed by thermal and ozonation; results were consistent with literature. Pre-treated WAS was fed to 12 1-L anaerobic digesters operated in semi-continuous mode. Thermal and thermo-alkaline reactors produced biogas yields (0.30-0.36 m(3) kg(-1) VS in standard conditions, 65-70 % methane) analogous to mesophilic conditions. The economic assessment of the scale-up of the whole process demonstrated that thermo-alkaline pre-treatment made AD at 20 degrees C economically profitable for WAS generated by a 20,000 PE WWTP. (C) 2019 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码：28 / 37
页数：10
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