盐分对餐厨垃圾厌氧消化的影响  

Effect of Salinity Concentration on Anaerobic Digestion of Food Waste

作　　者：刘研萍[1] 王玮[1] 陈雪 袁海荣[1] 邹德勋[1] 朱保宁[1] 李秀金[1] 

机构地区：[1]北京化工大学环境科学与工程系,北京100029 [2]北京国能中电节能环保技术有限责任公司,北京100020

出　　处：《中国沼气》2016年第2期53-57,共5页China Biogas

基　　金："十二五"科技支撑项目(2015BAD21B03;2014BAC24B01)

摘　　要：高盐分对餐厨垃圾厌氧消化具有一定影响作用。文章采用批式试验,考察了不同Na+浓度下,厌氧消化产气量,甲烷含量,VFA,产甲烷菌数量等的变化,分析了不同Na+浓度对餐厨垃圾厌氧消化过程的影响,同时考察了连续式反应器(CSTR)中Na+浓度的变化趋势。试验结果表明,Na+浓度越高对餐厨垃圾厌氧消化产气性能的抑制越严重。当Na+浓度为5 g·L-1时,累积产气量为对照累积产气量的51%;而当Na+含量为10 g·L-1时,累积产气量为对照组累积产气量的1%;随着Na+浓度的升高,VFA大量积累;通过荧光显微镜观察到,Na+浓度升高后,产甲烷菌数量有所下降。在餐厨垃圾厌氧消化连续运行过程中,随着负荷的升高和运行天数的延续,反应体系中Na+不断累积,Na+累积速率亦逐渐升高。The effect of Na＋on the anaerobic digestion process of food waste was experimented by adding different concentration of Na＋,and the biogas yield,methane content,VFA,the quantity of methanogens were analyzed. The concentration of Na＋in continuous stirred tank reactor was monitored. The results show that the higher the concentration of Na＋,the more serious inhibition of anaerobic digestion appeared. When the concentration of Na＋was 5 g·L- 1,the gas production was 51% of the control,and it was only 1% of gas production of the control when the concentration of Na＋was 10g·L- 1. Along with the increase of Na＋concentration,the VFA in the system were accumulated,p H was reduced,and consequently the quantity of methanogens decreased. And along with the increase of organic loading and running time,more and more Na＋accumulated and the accumulating speed were also gradually became more and more quick. and the rate of Na＋accumulation was increased at the same time.

关 键 词：Na+浓度 餐厨垃圾 厌氧消化 抑制作用 

分 类 号：S216.4[农业科学—农业机械化工程] X705[农业科学—农业工程]