Pre-treatment mechanisms during thermophilic-mesophilic temperature phased anaerobic digestion of primary sludge

被引：136

作者：

Ge, Huoqing ^{[1
]}

Jensen, Paul D. ^{[1
]}

Batstone, Damien J. ^{[1
]}

机构：

[1] Univ Queensland, Environm Biotechnol CRC, Adv Water Management Ctr, AWMC, Brisbane, Qld 4072, Australia

来源：

WATER RESEARCH | 2010年 / 44卷 / 01期

关键词：

Temperature phased anaerobic digestion; Thermophilic pre-treatment; Mesophilic pre-treatment; Primary sludge; PERFORMANCE; KINETICS; PLANT; MODEL;

D O I：

10.1016/j.watres.2009.09.005

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Pre-treatment is used extensively to improve degradability and hydrolysis rate of material being fed into digesters. One emerging process is temperature phased anaerobic digestion (TPAD), which applies a short (2 day) 50-70 degrees C pre-treatment step prior to 35 degrees C digestion in the main stage (10-20 days). In this study, we evaluated a thermophilic-mesophihc TPAD against a mesophilic-mesophilic TPAD treating primary sludge. Thermophilic-mesophilic TPAD achieved 54% VS destruction compared to 44% in mesophilic-mesophilic TPAD, with a 25% parallel increase in methane production. Measurements of soluble COD and NH4+-N showed increased hydrolysis extent during thermophilic pre-treatment. Model based analysis indicated the improved performance was due to an increased hydrolysis coefficient rather than an increased inherent degradability, suggesting while TPAD is suitable as an intensification process, a larger main digester could achieve similar impact. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：123 / 130

页数：8

共 25 条

[1]

[Anonymous], 2002, WATER INTELL ONLINE, DOI DOI 10.2166/9781780403052

[2]

APHA (AMERICAN PUBLIC HEALTH ASSOCIATION), 1995, Standard Methods for the Examination of Water and Waste Water

[3] Evaluation, selection and initial performance of a large scale centralised biosolids facility at Oxley Creek Water Reclamation Plant, Brisbane [J].