一体化笼式生物脱氮反应器水力特性  

Hydraulic characteristics of integrated cage denitrification bioreactor

作　　者：张红陶[1] 郑平[1] 

机构地区：[1]浙江大学环境工程系,浙江杭州310058

出　　处：《化工学报》2013年第10期3760-3766,共7页CIESC Journal

基　　金：国家自然科学基金项目(31070110);教育部博士点基金项目(20110101110078);浙江省重点自然科学基金项目(Z5110094)~~

摘　　要：水力特性是生物脱氮反应器高效稳定运行的基础,采用脉冲刺激响应技术研究了一体化笼式生物脱氮反应器的水力特性。试验结果表明:在水力停留时间为4h,水力负荷为6.0m3·m-3·d-1,表面流速0.145m·h-1的条件下,该反应器的流态趋于全混流。以多釜串联模型表征,供气量为1.714、3.214、6.429、8.571m3·m-3·h-1时的串联釜数依次为1.55、1.56、1.54和1.55;以轴向扩散模型表征,对应的Peclet数分别为1.479、1.503、1.466和1.478;两个模型预测结果一致。反应器总死区的均值为41.63%,其中水力死区的均值为21.99%。在所试范围内,供气量对其水力特性的影响较小。The hydraulic characteristics of integrated cage denitrification bioreactor were investigated using pulse-stimulus response technique. The flow pattern of the bioreactor tended to be complete mixed flow with hydraulic retention time 4 h, superficial velocity 0. 145 m · h^-1 , hydraulic load rate 6.0 m3 ·m-3·d-1. When it was simulated with tanks-in-series （TIS） model, N number was 1.55, 1.56, 1.54 and 1.55 at air flow rate 1. 714, 3.21%, 6. 429, 8. 571 m3 ·m-3·d-1respectively. When it was simulated by axial dispersion （AD） model, the corresponding Peclet numbers were 1. 479, 1. 503, 1. 466 and 1. 478 at air flow rate 1. 714, 3. 214, 6. 429, 8. 571 m3 ·m-3·d-1respectively. The prediction of TIS model and AD model matched with each other. The mean value of total dead space of the bioreactor was 41.63%, and the hydraulic dead space was 21.99%. However, air flow rate had little effect on the hydraulic behavior of the bioreactor in this investigation.

关 键 词：生物脱氮反应器 水力特性 死区 供气量 

分 类 号：X703.1[环境科学与工程—环境工程]