上流式厌氧污泥床处理豆制品废水

Anaerobic Treatment of Soyabean Produts Wastewater by UASB Reactor

上流式厌氧污泥床(UASB)中温(35℃)处理豆制品废水(pH3.5～4.0)的最高COD负荷率、最高产气率、最高表面液体和气体上流速率分别达到了20.1g/L·d、10.6L/L·d和12m/d.COD去除率为90％,甲烷含量为55％。反应器内生物量以颗粒污泥形式存在,直径1.0～3.0mm不等。颗粒污泥中发酵性细菌、产氢产乙酸细菌、乙酸裂解产甲烷菌、氧化氢的产甲烷菌和利用甲酸的产甲烷菌数量分别为1.4×10^(12)、0.7×10~9、1.8×10~9、1.6×10~9、0.9×10~5个/mL.与甲烷毛发菌(Methanoseata)相类似的丝状菌是颗粒污泥中的优势产甲烷菌。

The maximum COD loading rate of 21.1 g/L·d, the maximum biogasproduction rate of 10.6 L/L·d and the maximum superficial liquid and gasupflow velocities of 12 m/d are reached when soyabean products wastewater are treated at 35℃ with inlet pH value of 3.5-4.0 using UASB reactor. TheCOD removal rate is 90%, the biomass cultivated in the reactor is in the formof granular sludge with diameters varying from 1.cmm to 3.0 mm. The enu-merations of different groups presented in the granular sludge(per millilitre)are 1.4×10^(l2), 0. 7×10~9, 1.8×l0~9, 1.6×10~5 and 0.9×10~5 for acidogens, hydro-gen-producing acetogens, aceticlastic methanogens, hydrogen-oxidizing metha-nogens, and formate-consuming methanogens respectively.