摘要
为了考察厌氧折流板反应器(ABR)处理含硫酸盐有机废水的相分离特性,采用有效容积为32L的五隔室ABR,通过为期132d的启动试验,研究了启动运行过程中各隔室COD和SO24-降解情况、VFA和S2-分布规律及颗粒污泥微生物相变化状况.结果表明,采用低负荷低增幅方式启动,在132d内成功启动ABR并达到稳定,COD和SO24-的负荷分别由1.5kg·(m3·d)-1逐渐提高到3.3kg·(m3·d-1)和由0.07kg·(m3·d-1)逐渐提高到0.18kg·(m3·d-1),COD和SO24-的去除率分别为95%和85%左右.各隔室COD沿程呈递减趋势,其去除主要由第1、4、5隔室完成,SO42-的去除主要由前面三隔室承担,前面三隔室的VFA和S2-浓度较高,到最后两隔室则急剧降低;随负荷的增加,承担COD及SO42-主要去除作用的隔室后移,前面三隔室的VFA和S2-最高点及最后两隔室的VFA和S2-的急剧降低位置也后移;各隔室的微生物经长期运行驯化后表现出良好的种群配合和高度的特异性,具有明显的产酸相与产甲烷相、硫酸盐还原相与硫单质生成相的分离特征.
Phase separation characteristics of anaerobic baffled reactor （ABR） treating organic wastewater containing sulphate were investigated in a 5-compartment ABR with an effective volume of 32 L.During a start-up experiments of 132 days,the chemical oxygen demand（COD） and sulphate（SO42-） removal efficiency,volatile fatty acid（VFA） and sulfide（S2-） distribution in each compartment were measured.The microbiology communities of granular sludge were also investigated by scanning electronic microscope（SEM）.The experimental results showed that low influent loading and low increase are the keys to start-up of ABR.The volumetric loading rates of COD and SO42-increased stage and stage from 1.5 kg·（m3 ·d）-1 to 3.3 kg·（m3 ·d）-1 and from 0.07 kg·（m3 ·d）-1 to 0.18 kg·（m3 ·d）-1 for 132d,and achieved a stable state that resulted in 95% COD and 85% SO42-removal.COD had the trend of decreasing with compartments along flow direction,it＇s removal rate in compartment 1,4 and 5 took the large proportion in total COD removal rate,and sulphate removal rate in the initial three compartments took the large proportions in the total sulphate removal rate.The VFA and S2-concentrations were high in the initial three compartments and obviously declined in the final two compartments.With the loading rate increase,the proportion of COD and SO42-removal rates in the final room increased,the highest and the lowest point of VFA and S2-concentrations were gradually moved to hind room.The SEM observation indicated microbiology communities of granular sludge in each compartment were cooperative and specific,it showed that the acidogenic phase and methanogenic phase,sulfate-reducing phase and sulfur-producing phase were separated in the ABR.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2010年第7期1544-1553,共10页
Environmental Science
基金
广西环境工程与保护重点实验室基金项目(桂科能0701K002)
2009年广西区教育厅立项项目(200911LX103)
2008年"国家大学生创新实验计划"项目(081059512)
