Effect of free nitrous acid pre-treatment on primary sludge at low exposure times

被引：26
|
作者：
Zahedi, S. [1 ]
Icaran, P. [2 ]
Yuan, Z. [3 ]
Pijuan, M. [1 ]
机构：
[1] Univ Girona, Catalan Inst Water Res ICRA, Emili Grahit St 101,H2O Bldg,Sci & Technol Pk, Girona 17003, Spain
[2] FCC Aqualia, Dept Innovat & Technol, Balmes St 36,6th Floor, Barcelona 08007, Spain
[3] Univ Queensland, Adv Water Management Ctr, St Lucia, Qld 4072, Australia
来源：
BIORESOURCE TECHNOLOGY | 2017年 / 228卷
关键词：
Anaerobic digestion; Free-nitrous acid pre-treatment; Methane production; Primary sludge; Sludge biodegradability; WASTE ACTIVATED-SLUDGE; METHANE PRODUCTION; DIGESTION; FERMENTATION; INHIBITION;
D O I：
10.1016/j.biortech.2016.12.117
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
The present study was undertaken to investigate the effect of different free nitrous acid (FNA) concentrations at low pre-treatment times (PTs) (1, 2 and 5 h) and without pH control with mild agitation on primary sludge (PS) biodegradability and methane production (MP). Increasing PTs resulted in an increase in the solubility of the organic matter (around 25%), but not on cell-mortality (> 75% in all the cases with FNA) and neither on methane generation. FNA pre-treatment at low PTs improve MP (around 16% at PT of 1 h and 650 mg N-NO2 /L). However, a similar improvement was found with mild agitation of PS without FNA at 2 and 5 h. Taking into account the potential costs associated with the FNA pretreatment, a mild agitation without FNA would be preferred to enhance MP in PS. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：272 / 278
页数：7
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