Micro-polluted Raw Water Treated In An SBBR With Low Aeration Rate
A sequencing batch biofilm reactor (SBBR) packed with ceramsite as the carrier for biofilm colonization was used to pretreat micro-polluted raw water. The effect on low aeration rate was investigated. The results indicated that when the air-water ratio decreased from 4:1 to 0.125:1, the turbidity, CODMn and NH4+-N could maintain in high removal efficiency. The average removal rate of turbidity, CODMn and NH4+-N was 75.2％, 44.2％, 86.4％, respectively. Even in the condition of no aeration, the average removal rate of turbidity, CODMn and NH4+-N could still reached to 68.4％, 22.8％, 67.9％, respectively. It could be seen that SBBR pretreating the micro-polluted water with low aeration was feasible. Due to the intermittent operation of SBBR, the microorganisms were distributed uniform in the system. No clogging of the packing material was observed and the reactor had no need to backwash throughout the test period. The results of SEM showed that the biofilm structure is uniform and dense. The PCR-DGGE analysis indicates that the biofilm is characterized by richer and more diverse biological species than sediments from river and the reactor.
Micro-polluted raw water SBBR Air-water ratio Biofilm.
Jingjing Zhang Jun Li Lingxiao Gong Rulong Zhu Yongjiong Ni Su Wei
College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou, Zhejiang, China
国际会议
三峡
英文
212-215
2012-05-18（万方平台首次上网日期，不代表论文的发表时间）