厌氧及二级交互间歇曝气工艺条件下微生物生长动力学特性

Characterization of Microbial Kinetics for CHBNR Process

在厌氧及二级交互间歇曝气工艺条件(CHBNR,Cui-Hong Biological Nutirents Removal Process)和厌氧-好氧工艺条件下(ASP,Activated Sludge Process)分别确定微生物生长动力学系数,并比较评价了厌氧及二级交互间歇曝气工艺的微生物生长动力学特性.通过试验得出在厌氧及二级交间歇曝气条件下Y(微生物增长系数)、Kd(微生物衰减系数)、K(微生物最大相对增长速度)、Ks(饱和常数)分别为0.200,0.055 d-1,3.12 d-1,38.3 mg/L.厌氧及好氧条件下Y,Kd,K,Ks分别为0.253,0.092 d-1,2.22 d-1,31.7 mg/L.这说明厌氧及二级交互间歇曝气工艺,虽然消耗很多的外部有机物质,但维持自身所需的能源少,相对增长速度小,污泥的生产量少,因而,废弃的污泥量会减少,处理污泥费用降低.

The microbial kinetic coefficients in the anaerobic and two-stage alternation intermission aerobic technology conditions （CHBNR, Cui-Hong Biological Nutrients Removal Process） were compared with that in the anaerobic-aerobic technology conditions （ASP, Activated Sludge Process）. From that, microbial kinetic characteristic of the anaerobic and two-stage alternation intermission aerobic process were evaluated. We got such data by experiment in the anaerobic and two-stage alternation intermission aerobic technology conditions： Y（microbial growth coefficient） = 0. 200, Kd（attenuation coefficient） = 0. 055 d^- 1, K （microbial maximum specific growth rate）= 3.12 d^-1, Ks（saturation constant）= 38.3 mg/L; and in the anaerobic and aerobic technical conditions： Y=0.253, Ka=0.092 d^-1, K =2.22 d^-1, Ks=31.7 mg/L. These datum showed that in the anaerobic and two-stage alternation intermission aerobic process, microbes consume more organic compound, use less energy to maintain itself, and output but sludge is smaller. Therefore, discarded sludge can decrease, and the cost of dealing with sludge can reduce.