[pH值为6.0的酸性条件下产甲烷膨胀颗粒污泥床（EGSB）反应器运行研究]

[Study on the operation of a methanogenic EGSB reactor under acid condition at pH 6.0].

作者信息

Ling Xue-feng, Zuo Jian-e, Gu Xia-sheng

机构信息

Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China.

出版信息

Huan Jing Ke Xue. 2004 Jan;25(1):57-61.

PMID:15330422

Abstract

In this paper the methanogenic process under acid condition at pH 6.0 was studied. Inoculated with neutral granular sludge, a 3.1 L 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 3000 mg/L, COD OLR 5 kg/(m3 x d), the average COD removal efficiency of the EGSB reactor was 95.0%, while the effluent alkalinity (CaCO3) was only 328.5 mg/L, the biogas production per gram removal COD was 372.2 mL with 57.6% methane content. At pH 6.0, influent COD 4000 mg/L, COD OLR 7.5 kg/(m3 x d), the average COD removal efficiency was 90.9%, and the effluent alkalinity (CaCO3) was 404.8 mg/L, the biogas production per gram removal COD was 446.3 mL 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.

摘要

本文研究了pH值为6.0的酸性条件下的产甲烷过程。以中性颗粒污泥为接种物，对一个3.1 L的膨胀颗粒污泥床（EGSB）反应器运行345天，反应器内pH值逐渐降低，获得了耐酸产甲烷颗粒污泥，厌氧EGSB反应器在较低pH值和较低碱度下稳定运行。在pH值为6.0、进水化学需氧量（COD）为3000 mg/L、COD容积负荷率（OLR）为5 kg/(m³·d)时，EGSB反应器的平均COD去除效率为95.0%，而出水碱度（以碳酸钙计）仅为328.5 mg/L，每克去除COD的沼气产量为372.2 mL，甲烷含量为57.6%。在pH值为6.0、进水COD为4000 mg/L、COD OLR为7.5 kg/(m³·d)时，平均COD去除效率为90.9%，出水碱度（以碳酸钙计）为404.8 mg/L，每克去除COD的沼气产量为446.3 mL，甲烷含量为55.9%。EGSB反应器在pH值为6.0 - 6.1下运行112天，结果表明在低pH值和低碱度下稳定的产甲烷过程是可行的。