Analysis on upgrading and reconstruction effect of a municipal sewage treatemnt plant by MBBR in Guizhou plateau
A sewage treatment project in Guizhou plateau adopted MBBR process for biological tank recon-struction,and then raised the effluent standard from level B grade 1 to level A grade 1 in GB 18918-2002 Dis-charge standard of pollutants for municipal wastewater treatment plant.The said project made the best use of the original biological tank and saved land at the same time.The reconstructed system showed good removal effect on various pollutants and the effluent water quality stably met the design discharge standard.High-throughput se-quencing showed that the microbial richness and diversity of suspended carrier biofilm were higher than that of activated sludge,which laid a microbiological foundation for system performance improvement,besides,the rela-tive abundance of nitrifying bacteria on the suspended carrier biofilm was much higher than that of the activated carbon,which strengthened the nitrification performance of the system.The direction operation cost of the project is 0.198 yuan/m3,which can provide reference for similar projects in southwest China.
plateau sectionMBBRoriginal biological tank reconstructionmicrobial diversitynitrifying bacteria
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万方数据
