增强污水污泥的厌氧发酵以增加沼气产量。

Enhancing anaerobic fermentation of sewage sludge for increasing biogas generation.

作者信息

Bien January B, Malina Grzegorz, Bien Jurand D, Wolny Lidia

机构信息

Institute of Environmental Engineering, Czestochowa University of Technology, Czestochowa, Poland.

出版信息

J Environ Sci Health A Tox Hazard Subst Environ Eng. 2004;39(4):939-49. doi: 10.1081/ese-120028404.

DOI:10.1081/ese-120028404

PMID:15137710

Abstract

The article presents results of biogas generation from sewage sludge after applying two pretreatment methods: sonification and thermal hydrolysis. Original results and literature data of the ultrasonic field influence on biogas generation were compared with literature data concerning effectiveness of the thermal hydrolysis. Sludge pretreatment by the ultrasonic field intensified the biogas production as the amounts of biogas was of ca. 20-24% higher, as compared to the nontreated sludge. The highest generation of biogas was observed after a shorter time. The degree of organic matter reduction was of 45-47%. The content of volatile fatty acids dropped down to 139 mg CH3COOH dm(-3) during 20 days. During the thermal pretreatment of sludge the amounts of generated biogas were ca. 25% higher, as compared to nontreated sludge. The maximum biogas production of 0.92 dm3 was observed in the day 9 of fermentation. To-date results indicate that efficiency of ultrasonic disintegration depends on sonification time, type of heads, as well as power and frequency transmitted to heads.

摘要

本文介绍了采用两种预处理方法（超声处理和热水解）后污水污泥产生沼气的结果。将超声场对沼气产生影响的原始结果和文献数据与热水解效果的文献数据进行了比较。与未处理的污泥相比，超声场对污泥进行预处理可提高沼气产量，沼气量约高出20 - 24%。在较短时间后观察到最高的沼气产量。有机物减少程度为45 - 47%。在20天内挥发性脂肪酸含量降至139 mg CH₃COOH dm⁻³。与未处理的污泥相比，在污泥热预处理过程中产生的沼气量约高出25%。在发酵第9天观察到最大沼气产量为0.92 dm³。目前的结果表明，超声破碎的效率取决于超声处理时间、探头类型以及传递到探头的功率和频率。