摘要
采用中性颗粒污泥接种 ,运行一个 3 1L的EGSB反应器共 345d ,通过逐步降低pH值 ,获得了耐酸的产甲烷颗粒污泥并实现厌氧反应器在低 pH、低碱度条件下的稳定运行 .在 pH 6 0 ,进水COD 30 0 0mg/L ,COD容积负荷 5kg/(m3 ·d)时 ,反应器的COD平均去除率为 95 0 % ,出水总碱度 (以CaCO3 计 )仅为 32 8 5mg/L ,每 g去除COD的沼气产量为 372 2mL ,沼气中甲烷含量约为 5 7 6 % ;在进水COD 4 0 0 0mg/L ,COD容积负荷 7 5kg/(m3 ·d)时 ,COD平均去除率为 90 9% ,出水总碱度仅为4 0 4 8mg/L ,每 g去除COD的沼气产量为 4 4 6 3mL ,甲烷含量约为 5 5 9% .EGSB反应器在 pH6 0～ 6 1的范围内共运行112d ,表明在低 pH、低碱度下实现稳定的产甲烷过程是可行的 .
In this paper the methanogenic process under acid condition at pH 6.0 was studied. Inoculated with neutral granular sludge, a 3.1L EGSB reactor was operated for 345 days, the pH value in the reactor was gradually lowered down, and the acid-tolerant methanogenic granular sludge was achieved, and the anaerobic EGSB reactor was operated stably under lower pH and lower alkalinity. At pH 6.0, influent COD 3 000mg/L, COD OLR 5kg/(m3·d), the average COD removal efficiency of the EGSB reactor was 95.0%, while the effluent alkalinity (CaCO 3) was only 328.5mg/L, the biogas production per gram removal COD was 372.2mL with 57.6% methane content; At pH 6.0, influent COD 4 000mg/L, COD OLR 7.5kg/(m3·d), the average COD removal efficiency was 90.9%, and the effluent alkalinity(CaCO 3) was 404.8mg/L, the biogas production per gram removal COD was 446.3mL with 55.9% methane content. The EGSB reactor was operated at pH 6.0～6.1 for 112 days, which showed the stable methanogenic process was feasible at low pH and low alkalinity.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2004年第1期57-61,共5页
Environmental Science
基金
国家自然科学基金资助项目 ( 5 0 0 0 80 0 9)
高校博士点基金资助项目 ( 970 0 0 3 2 )
