不同循环比条件下水解酸化工艺处理厌氧发酵液  

Study on hydrolysis acidification process for treating anaerobic digested piggery wastewater under different cycle ratio conditions

作　　者：霍守亮[1] 曾凤[1] 席北斗[1] 昝逢宇[1,2] 张靖天[1] 李翔[1] 

机构地区：[1]中国环境科学研究院,北京100012 [2]安徽师范大学环境科学学院,安徽芜湖241000

出　　处：《化工进展》2012年第3期687-692,共6页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(40901248);国家科技支撑计划课题(2009BADC2B01);安徽省自然科学青年基金(10040606Q33)项目

摘　　要：采用水解酸化工艺处理厌氧发酵液,研究了不同循环比条件下,水解过程挥发性脂肪酸和氮元素转化规律。结果表明:水解过程产生的挥发性脂肪酸主要有甲酸、乙酸和丙酸,仅有少量样品检测出甲酸,乙酸和丙酸占有机酸总量比例较大。在循环比为1/3条件下产生的有机酸的种类、总量比其它两个条件要多。处理后出水中COD浓度与有机酸总量、乙酸、丙酸浓度均呈线性关系。循环比1/3条件下,处理后出水中氨氮和硝态氮浓度最低(分别为3.57 mg/L和48.60 mg/L),脱氮效果最好。In this study,a biological removal process using a combination recirculating system of hydrolyze-acidification was used to treat digested piggery wastewater.The transformation of volatile fatty acids（VFAs）and nitrogen under different cycle ratio conditions for this recirculating system were investigated.The results showed that formic acid,acetic acid and propionic acid give main contribution of VFAs in hydrolysis process.The concentration of formic acid was very low or undetected,and the proportion of acetic acid and propionic acid in organic acids were high.The species and concentrations of organic acids on 1/3 cycle ratio were higher than these under other two conditions.The relationship between COD and organic acids contents,COD and acetic acid,COD and propionic acid were linear.The good efficiency for nitrogen removal was obtained at 1/3 cycle ratio with the lowest NH3-N and NO3——N concentrations in treated effluent of 3.57 mg/L and 48.60 mg/L,respectively.

关 键 词：发酵液 循环比 有机酸 水解酸化 硝化反硝化 

分 类 号：X703.1[环境科学与工程—环境工程]