摘要
分别采用中性颗粒污泥和河底沉积物接种运行两个颗粒污泥膨胀床 (EGSB)反应器 ,通过逐级降低pH的运行策略 ,驯化和培养了耐酸产甲烷颗粒污泥 ,两个EGSB反应器均能在pH5 8～ 6 2条件下稳定运行 ,容积负荷可达 5 5～ 7 5kgCOD (m3 d) ,COD去除率约 90 % ;两种颗粒污泥在低pH值下均能保持较高的产甲烷活性 ,pH5 5时 ,仍能保持pH7 0时活性的 5 1 8%和 5 5 6% ;还对耐酸颗粒污泥的粒径分布、沉降性能、金属元素含量、微观结构及细菌在颗粒表面和内部的分布等进行了研究。
Two lab-scale expanded granular sludge bed reactors were operated using granular sludge and river sediments as seed sludge respectively, through gradually lowering down the inner pH values, acid-tolerant methanogenic granular sludge with good methanogenic activity were acquired and formed. Two EGSB reactors could be operated steadily under the condition of pH 5.8～6.2, and their volumetric loading rates were about 5.5～7.5 kg COD/(m3/d), the COD removal efficiencies were about 90%. The granular sludges taken from two reactors could maintain relatively higher methanogenic activity under low pH, and the relative activities of the granular could be 51.78% and 55.6% of the value with the condition of pH 7.0 when pH was 5.5. Studies on the diameter distribution, settling velocities, concentrations of different metal elements and microbiological characteristics of these acid-tolerant granular sludges were also conducted.
出处
《微生物学通报》
CAS
CSCD
北大核心
2004年第5期65-70,共6页
Microbiology China
基金
国家自然科学基金项目 (No 5 0 0 0 80 0 9)
国家"863"计划项目 (No 2 0 0 2AA60 1 1 90 )
