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Open AccessArticle

Pilot-Scale Hydrolysis-Aerobic Treatment for Actual Municipal Wastewater: Performance and Microbial Community Analysis

State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
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Int. J. Environ. Res. Public Health 2018, 15(3), 477; https://doi.org/10.3390/ijerph15030477
Received: 30 January 2018 / Revised: 26 February 2018 / Accepted: 27 February 2018 / Published: 9 March 2018
(This article belongs to the Special Issue Municipal Wastewater Treatment)
Low-energy cost wastewater treatment is required to change its current energy-intensive status. Although promising, the direct anaerobic digestion of municipal wastewater treatment faces challenges such as low organic content and low temperature, which require further development. The hydrolysis-aerobic system investigated in this study utilized the two well-proven processes of hydrolysis and aerobic oxidation. These have the advantages of efficient COD removal and biodegradability improvement with limited energy cost due to their avoidance of aeration. A pilot-scale hydrolysis-aerobic system was built for performance evaluation with actual municipal wastewater as feed. Results indicated that as high as 39–47% COD removal was achieved with a maximum COD load of 1.10 kg/m3·d. The dominant bacteria phyla included Proteobacteria (36.0%), Planctomycetes (15.4%), Chloroflexi (9.7%), Bacteroidetes (7.7%), Firmicutes (4.4%), Acidobacteria (2.5%), Actinobacteria (1.8%) and Synergistetes (1.3%), while the dominant genera included Thauera (3.42%) and Dechloromonas (3.04%). The absence of methanogens indicates that the microbial community was perfectly retained in the hydrolysis stage instead of in the methane-producing stage. View Full-Text
Keywords: hydrolysis-aerobic; municipal wastewater treatment; microbial community; high-throughput sequencing hydrolysis-aerobic; municipal wastewater treatment; microbial community; high-throughput sequencing
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Bian, X.; Gong, H.; Wang, K. Pilot-Scale Hydrolysis-Aerobic Treatment for Actual Municipal Wastewater: Performance and Microbial Community Analysis. Int. J. Environ. Res. Public Health 2018, 15, 477.

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