UASB反应器处理含蛋白质废水颗粒污泥形成的研究

以含蛋白质废水为基质,UASB反应器内培养颗粒污泥的试验结果表明,控制反应器出水 pH在7.2—7.5之间,出水丙酸浓度不超过300mg/L条件下,污泥负荷大于0.67kg COD/kgVSS·d时反应器内形成了颗粒污泥.MPN法计数发酵性细菌、丙酸分解菌、丁酸分解菌、乙酸裂解产甲烷菌和甲酸/H_2+CO_2,产甲烷菌的数量,只有当各类群细菌数量达到一定水平并且有合适的比例时才能形成颗粒污泥,颗粒污泥成熟后其组成相对稳定.颗粒污泥同接种污泥相比,其最大比产甲烷活性提高较大,是细菌数量增加的缘故。

Anaerobic Sludge Granulation in a UASB Re- actor Treating Protein-containing Wastewa-ter.

This paper describes the results of culturing anaerobic gianular sludge in a UASB reactor treating protein-containing wastewater. It was showed that granular sludge formed in the reactor when the sludge loading rate was above 0.67 kg/kg VSS'd and pH of effluent was in the range of 7.2-7.5, the propionate in the effuent was below 300 mg/L. It was found by microbiological analyses that only when a variety of bacteria (fermentative bacteria, propionate degraders, butyrate degraders, acetoclastic me-thanogens and formate/H2+ CO2 methanogens) had got a proper number and in appropriate proportion, did the tludge granulate. After granular sludge matured, its components were relatively stable. Compared with the seed sludge, the catabolic activity of granular sludge was much higher due to the increase of bacteria in the granular sludge.