二级串联UASB反应器处理餐厨垃圾废水研究  

Research on Food Wastewater Treatment by Two-stage UASB Reactor

作　　者：饶坤[1] 谭小红[1] 黄安娜 严永红[1] 朱建林[1] 

机构地区：[1]宁波大学建筑工程与环境学院,浙江宁波315211 [2]宁波开诚生态技术有限公司,浙江宁波315177

出　　处：《中国给水排水》2014年第21期23-26,共4页China Water & Wastewater

基　　金："十二五"国家科技支撑计划项目(2012BAC25B05)

摘　　要：利用两个容积为200L的反应器进行了餐厨垃圾废水半连续式二级串联中温[（35±2）℃]UASB厌氧处理试验，研究了第二级反应器的HRT对处理效果的影响。结果表明，在第一级UASB反应器对COD的去除率为85％、产气量为281．5—330．0L／d的基础上，第二级UASB反应器对COD的去除率仍可达15．5％～65％，产气量为35．8～102．7L／d，使得对COD的总去除率达到96％；第二级反应器的HRT=20d时，去除效果最稳定，而当HRT=15d时日产气量最高；第一级＋UASB出水VFA／碱度值保持在0．29左右，第二级UASB出水VFA／碱度值在0．33～0．45之间，说明反应器具有较强的抗酸化缓冲能力。Anaerobic digestion of food wastewater was performed by employing two semi-continuous two-stage UASB reactors with effective volume of 200 L each under mesophilic condition （35 ± 2 ） ℃, and the influence of hydraulic retention time （HRT） of the second-stage reactor on the treatment efficien- cy was investigated. The results indicated that the COD removal efficiency and the biogas production of the first-stage UASB reactor were 85% and 281.5 to 330.0 L/d respectively, and those of the second- stage UASB reactor were 15.5% to 65% and 35.8 to 102.7 L/d respectively, making the total COD re- moval efficiency increased to nearly 96%. The system operated with the most stability while HRT of the second-stage reactor was 20 d, and the highest daily biogas production was achieved at HRT = 15 d. The VFA/basicity ratio of the effluent from the first-stage UASB reactor remained at around 0. 29, and that of the effluent from the second-stage UASB reactor maintained between 0.33 and 0.45, implying that the two-stage UASB system has a strong buffering capacity to resist acidification.

关 键 词：餐厨垃圾废水 二级串联UASB 厌氧消化 

分 类 号：X703[环境科学与工程—环境工程]