内循环颗粒污泥床硝化反应器临界曝气强度的研究  

Research on Critical Aerating Flux of Internal-loop Granular Sludge Bed Nitrifying Reactor

作　　者：卢刚[1] 郑平[1] 夏凤毅[1] 

机构地区：[1]浙江大学环境工程系,杭州310029

出　　处：《生物工程学报》2004年第5期795-799,共5页Chinese Journal of Biotechnology

基　　金：国家自然科学基金资助项目 (No .3 0 0 70 0 17);浙江省重大科技攻关资助项目~~

摘　　要：内循环颗粒污泥床硝化反应器是一种新型高效硝化反应器 ,在反应器运行过程中 ,液体循环临界曝气强度和颗粒污泥流化临界曝气强度是两个重要操作参数。建立了升流区表观液速Ulr与曝气强度Ugr之间的关系 ,并测定了有关的模型参数 ,得到了具体的数学表达式 :Ulr=(2 6 1 3- 0 0 2 4 )U0 871gr 0 2 76U0 871gr - 0 2 8。根据该模型 ,计算得到的液体循环临界曝气强度为 1 0 1 7cm min ,颗粒污泥流化临界曝气强度为 2 6 6 2cm min。实测结果证明 ,求得的两个临界曝气强度具有较高的准确性 。The internal loop granular sludge bed nitrifying reactor is a new type of aerobic nitrifying equipment and has taken on a good potential for nitrification. The critical aerating flux for liquid loop and critical aerating flux for fluidization of granular sludge are two important parameters for its operation. The relationship between liquid superficial velocity in riser ( U lr ) and aerating flux( U gr ) was studied, the model parameters were measured by experiment, and the relational expression was established. According to the model, the critical aerating flux for liquid loop and the critical aerating flux for fluidization of granular sludge were calculated as 1 017cm/min and 2 662cm/min, respectively. The experimental data from reactor operation showed that the two calculated critical aerating fluxes near the practical values. So they could be used to direct the design and operating optimization for the internal loop granular sludge bed nitrifying reactor.

关 键 词：内循环颗粒污泥床硝化反应器 临界曝气强度 液体循环 颗粒污泥 

分 类 号：X703[环境科学与工程—环境工程]