[Effect of aeration intensity on the filterability of mixed liquor in membrane bioreactor].

The influence of aeration intensity on membrane fouling in membrane bioreactors (MBR) was to investigate. Two lab-scale MBR with aeration intensity of 500 and 100 L/h were operated for 60 days at a constant permeate flux. The dead-end filtration tests were conducted to confirm the mixed sludge filterability under each condition.

[Effects of soluble microbial product on the performance of submerged membrane bioreactor].

The behaviors of soluble microbial products (SMP) and SMP effects on an operational process of submerged membrane bioreactor (SMBR) were studied. Within 90 days performance period, total organic carbon (TOC), molecular weight distributions (MWDs), specific oxygen uptake rate (SOUR)were periodically monitored. The dead-end filtration tests were used to indicate the SMP effect on membrane fouling.

[Comparison of sludge filtration characteristics between a membrane bioreactor and a conventional activated sludge process].

According to the filtration characteristics of sludge, a comparison between a membrane bioreactor (MBR) and a conventional activated sludge process(CAS) was carried out under similar conditions. Experiment results show that the filtration resistance in MBR was 2 to approximately 3 times of that in CAS. The contribution of supernatant resistance to filtration resistance was about 90% both in CAS and in MBR.