摘要
为了实现餐厨垃圾的减量化,采用高压脉冲电场(pulsed electric field,PEF)对餐厨垃圾预处理后接种厌氧污泥进行厌氧发酵,考察pH、挥发性有机酸(VFA)与日产气量的关系,分析PEF对餐厨垃圾厌氧发酵的影响。结果表明:在温度50℃条件下,日产气量与pH成正比例变化趋势,与VFA呈反比例关系。经PEF(电场强度为9.0 k V·cm-1)预处理后,接种20%厌氧污泥,餐厨垃圾干物质产气量(285.1 m L·(g·TS)-1)与TS去除率(28.5%)均达到最高,高于无PEF预处理餐厨垃圾的干物质产气量(267.3 m L·(g·TS)-1)和TS去除率(26.8%)。PEF能够杀死餐厨垃圾样品中的微生物,改善接种后微生物的生存环境,减少微生物发生种间竞争的概率,利于提高产气量。
In order to achieve the reduction,restaurant food waste（ RFW） was inoculated with anaerobic sludge and carried out anaerobic fermentation after pre-treatment by high voltage pulse electric field（ PEF）. The relationship of p H,volatile fatty acids（ VFA） and daily gas production was investigated and the effect of PEF on anaerobic digestion of RFW was also analyzed. The results show that the change of p H is proportional to the gas production and the change of volatile fatty acids is inversely proportional to the gas production at 50 ℃. The dry matter gas production（ 285. 1 m L·（ g·TS）- 1） and removal rate of TS（ 28. 5%） were highest after RFW was pretreated by using PEF（ electric field strength of 9. 0 k V·cm- 1） and 20% of anaerobic sludge inoculums,which was higher than the dry matter gas production（ 267. 3 m L·（ g·TS）- 1） and removal rate of TS（ 26. 8%） of RFW without PEF. PEF could kill the microorganism of RFW,improve the microorganism ＇s living environment and reduce the probability of inter specific competition,and help to improve the gas production.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2015年第7期1995-2000,共6页
Bulletin of the Chinese Ceramic Society
基金
吉林省科技发展计划项目(20130303080SF,20150519020JH)
吉林省省校合作技术开发项目(吉工信科技2011-507)
吉林省教育厅十二五科学技术研究项目(2014-101)
关键词
餐厨垃圾
厌氧发酵
高压脉冲电场
挥发性脂肪酸
restaurant food waste
anaerobic fermentation
pulsed electric field
volatile fatty acids
