CAJ | 학술논문

采用基于微网基材的动态膜生物反应器处理生活污水,考察了其运行稳定性以及曝气方式、微网表面水力条件、水力负荷、混合液性质等对运行稳定性的影响.研究表明,侧方曝气比下方曝气更有利于动态膜的稳定运行;动态膜存在一个临界通量,在低于临界值的次临界通量下运行时,动态膜的过滤压差变化平稳;污泥浓度为5、10、15 g/L时临界通量范围分别为(120～160)、(80～120)、(60～80)L/(m~2·h);微网表面的错流流速越高、水力负荷越低,则动态膜过滤压差的增幅越缓慢;非正常运行状态(如污泥解体、丝状菌污泥膨胀)会对动态膜的运行产生不利影响.
채용기우미망기재적동태막생물반응기처리생활오수,고찰료기운행은정성이급폭기방식、미망표면수력조건、수력부하、혼합액성질등대운행은정성적영향.연구표명,측방폭기비하방폭기경유리우동태막적은정운행;동태막존재일개림계통량,재저우림계치적차림계통량하운행시,동태막적과려압차변화평은;오니농도위5、10、15 g/L시림계통량범위분별위(120～160)、(80～120)、(60～80)L/(m~2·h);미망표면적착류류속월고、수력부하월저,칙동태막과려압차적증폭월완만;비정상운행상태(여오니해체、사상균오니팽창)회대동태막적운행산생불리영향.
The dynamic membrane bioreactor based on coarse pore-sized materials was used to treat domestic sewage, and the operational stability of the bioreactor and the influences of aeration mode, hydrodynamic conditions along the dynamic membrane surface, hydraulic loading and property of mixed liquid on the stability were investigated. It is found that side aeration is more helpful for the stable operation of the dynamic membrane than inferior aeration. There exists a critical flux in dynamic membrane filtration. When the filtration is conducted under critical flux, namely, sub-critical flux operation, the transmembrane pressure increases slowly. The ranges of critical flux at sludge concentrations of 5, 10 and 15 g/L are 120 to 160 L/(m~2·h), 80 to 120 L/(m~2·h) and 60 to 80 L/(m~2·h) respectively. The transmembrane pressure increases more slowly when the cross-flow rate is higher and the hydraulic loading is lower. The stability of dynamic membrane decreases when sludge disaggregation or bulking occur.