Abstract
This study combined biofilm method and A/O process reasonably to form the biological treatment system. This experiment focused on the performance of the system for domestic sewage according to the determination of CODCr, ammonia nitrogen, total nitrogen, and total phosphorus. The A/O-mixed carrier system had a good removal effect on organic pollutants for simulated domestic sewage. At the start-up period, the average removal rates of CODCr, ammonia nitrogen and total nitrogen were 92%, 90% and 55%, respectively. But the removal effect of total phosphorus was not ideal.
Highlights
The rapid development of social economy and urbanization construction has steadily advanced, but it has made a series of problems such as insufficient water resources and serious water pollution, which is mainly due to the complexity of sewage
The performance of the system for domestic sewage according to the determination of CODCr, ammonia nitrogen, total nitrogen was investigated
3.5 c b a to effluent nitrate concentration from the aerobic zone increased, which resulted in the influent nitrate concentration of anoxic zone increased
Summary
The rapid development of social economy and urbanization construction has steadily advanced, but it has made a series of problems such as insufficient water resources and serious water pollution, which is mainly due to the complexity of sewage. The denitrification effect is low, and the total nitrogen removal efficiency (50-70%) is difficult to increase [3]. Membrane Bioreactor (MBR) [5], Fluidized Bed. Biological Reactor (FBBR) [6], Moving Bed Biofilm Reactor (MBBR) [7] and other technologies are used to replace the traditional process, so as to efficiently remove organic matter and simultaneously remove nitrogen and phosphorus. Kaindl et al [9] added MBBR as a pretreatment in the front stage of the conventional activated sludge process, and combined with ozone at the end to upgrade the domestic sewage plant. This study combined biofilm method and A/O process reasonably to form the biological treatment system, which takes advantage of various fillers to improve the decontamination efficiency of the system. The performance of the system for domestic sewage according to the determination of CODCr, ammonia nitrogen, total nitrogen was investigated
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