High-rate anaerobic co-digestion of kraft mill fibre sludge and activated sludge by CSTRs with sludge recirculation

被引：14

作者：

Ekstrand, Eva-Maria ^{[1
]}

Karlsson, MarieIle ^{[2
]}

Truong, Xu-Bin ^{[2
]}

Bjorn, Annika ^{[1
]}

Karisson, Anna ^{[2
]}

Svensson, Bo H. ^{[1
]}

Ejlertsson, Jorgen ^{[1
,2
]}

机构：

[1] Linkoping Univ, Dept Themat Studies, Environm Change, S-58183 Linkoping, Sweden

[2] Scandinavian Biogas Fuels AB, Hollandargatan 21A, S-11160 Stockholm, Sweden

来源：

WASTE MANAGEMENT | 2016年 / 56卷

关键词：

Pulp and paper; Anaerobic digestion; Sludge recirculation; High-rate CSTR; Fibre sludge; Activated sludge; WASTE-WATER; PULP; INHIBITION; ACETATE; LIGNIN;

D O I：

10.1016/j.wasman.2016.06.034

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Kraft fibre sludge from the pulp and paper industry constitutes a new, widely available substrate for the biogas production industry, with high methane potential. In this study, anaerobic digestion of kraft fibre sludge was examined by applying continuously stirred tank reactors (CSTR) with sludge recirculation. Two lab-scale reactors (4L) were run for 800 days, one on fibre sludge (R1), and the other on fibre sludge and activated sludge (R2). Additions of Mg, K and S stabilized reactor performance. Furthermore, the Ca:Mg ratio was important, and a stable process was achieved at a ratio below 16:1. Foaming was abated by short but frequent mixing. Co-digestion of fibre sludge and activated sludge resulted in more robust conditions, and high-rate operation at stable conditions was achieved at an organic loading rate of 4 g volatile solids (VS) L-1 day(-1), a hydraulic retention time of 4 days and a methane production of 230 +/- 10 Nm L per g VS. (C) 2016 Published by Elsevier Ltd.

引用

页码：166 / 172

页数：7

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