Freezing/thawing effects on anaerobic digestion of mixed sewage sludge

被引：99

作者：

Montusiewicz, A. ^{[1
]}

Lebiocka, M. ^{[1
]}

Rozej, A. ^{[1
]}

Zacharska, E. ^{[1
]}

Pawlowski, L. ^{[1
]}

机构：

[1] Lublin Univ Technol, Inst Environm Protect Engn, Fac Environm Engn, PL-20618 Lublin, Poland

来源：

BIORESOURCE TECHNOLOGY | 2010年 / 101卷 / 10期

关键词：

Freezing/thawing pre-treatment; Sludge disintegration; Sludge solubilization; Mixed sewage sludge; Enhanced biogas yield; WASTE-ACTIVATED-SLUDGE; THAWING TREATMENT; EXCESS SLUDGE; FERMENTATION; TECHNOLOGIES; ENHANCEMENT; PHOSPHORUS; REDUCTION; WATER;

D O I：

10.1016/j.biortech.2009.12.125

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

This Study examined the effects of freezing/thawing disintegration on the characteristics of mixed (primary and waste) sewage sludge from municipal wastewater treatment plants. It also assessed the effects of freezing/thawing on anaerobic digestion, and its consequences for biogas production and digester supernatant quality. Freezing/thawing caused a decrease of more than 10% in the total chemical oxygen demand (COD), total nitrogen (TN), volatile solids (VS) and total solids (TS). A simultaneous doubling of the Soluble COD and volatile fatty acids (VFA) occurred. Release of nitrogen and phosphorus compounds was also found. The biogas yield obtained from frozen/thawed sludge was 1.31 m(3) kg(-1) of removed VS; this exceeded approximately 1.5 times the value for the raw sludge. On the basis of the global mass balance it was indicated that freezing/thawing of the mixed sewage sludge followed by anaerobic digestion could be considered as a "double-phase digestion" rather than a pre-treatment method. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：3466 / 3473

页数：8

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