CIESC Journal ›› 2009, Vol. 60 ›› Issue (5): 1287-1291.

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Optimum structure analysis of carrier anaerobic baffled reactor

FENG Huajun,SHEN Dongsheng   

  • Online:2009-05-05 Published:2009-05-05

CABR厌氧生物反应器的结构优化分析

冯华军,沈东升   

  1. 浙江工商大学环境科学与工程学院

Abstract:

The carrier anaerobic baffled reactor (CABR), which combines with the characteristics of ABR and the advantages of biofilm reactor, is a suitable technology for decentralized domestic sewage treatment in rural areas of China.In order to improve the treatment efficiency and reduce the investment, it is essential to optimize the structure of CABR.On the basis of our study and analysis of hydromechanics and chemical reaction engineering, the CABR tended to show a state of plug flow as the number of compartments in the CABR increased.The CABRs had good structural performance, with a dead zone ranging from 8.04%—12.69% at the hydraulic retention time (HRT) of 48 h.In terms of chemical reaction engineering, the reaction rate of CABRs with 4, 6, 8 and 12 compartments were equivalent to that of the CSTRs of 148.35%, 181.82%, 175.40% and 185.81% times volume, respectively.When the effectiveness and capacity of the reactor were considered, a CABR with 6 compartments was found to be optimal.

Key words:

填料式厌氧折流板反应器, 优化分析, 平推流反应器, 死区

摘要: CABR反应器结合了ABR反应器的特点和生物膜反应器的优点,为保证处理效率及控制建造成本,需对其结构进行优化筛选。从化学反应工程学以及流体力学的角度对4个CABR反应器进行研究,分析表明:实际CABR反应器格数越多,反应器整体流态越接近理想平推流反应器流态;CABR反应器结构性能优良,在HRT为48h的运行条件下,其死区率仅为8.04~12.69%左右;从化学反应工程学角度折算其反应速率,4格、6格、8格和12格CABR反应器分别等效于148.35%、181.82%、175.40%和185.81% 倍体积的CSTR反应器。综合考虑反应器效能和容积利用率,比选出6格CABR反应器为最优。

关键词:

填料式厌氧折流板反应器, 优化分析, 平推流反应器, 死区