摘要
研究利用 UASB反应器考察了 COD和硫酸盐浓度的比值对硫酸盐还原的影响 ,同时分析了硫酸盐还原菌和产甲烷菌对COD的竞争情况 .发现在 HRT为 3.8h,SO2 -4 负荷为 6～ 7kg· ( m3· d) - 1 ,SO2 -4 浓度为 1 0 0 0 mg· L- 1 条件下 :1在 COD不足时 ,SRB与 MPB在竞争中占微弱优势 ;对于产甲烷活性比较好的厌氧污泥要经过较长的时间 ,SRB才能确立优势菌种的地位 .2 COD/ SO2 -4 比值决定了 SO2 -4 的去除率 .比值等于 2时 ,SO2 -4 的还原率在 95%以上 ;当比值为 1 .5时 ,SO2 -4 还原率为 75% ;当比值为 1时 ,SO2 -4 的还原率为 60 % .
In this paper,a UASB reactor was used to study the effect of COD/SO2-4 ratio to sulfate removal rate.The competition between sulfate reducing bacteria(SRB)and methane producing bacteria(MPB)was also studied.when the condition of hydraulic retention time(HRT) was 38h,SO2-4load rate was 6～7kg·(m3·d)-1,SO2-4 was 1000mg·L-1,SRB was at the potential of biomass with the COD was not enough at the end of test;the removal rate of SO2-4 was determined by COD/SO2-4 ratio,the removal rate of SO2-4 was more than 95%,75% and 60% when the ratio was 2,15 and 1,respectiviely.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2000年第4期106-109,共4页
Environmental Science
基金
北京市科委合同项目
