Long-term Operation Effect and Bacterial Community Characteristics of Sewage Treatment Facilities in the Service Area
Received date: 2022-02-22
Online published: 2022-09-06
In order to deeply study the long-term water purification effect and molecular biological mechanism of sewage treatment facilities in expressway service areas and promote its long-term stable operation, the treatment effect of the main water pollutants in the multi-media biofilter sewage treatment project in a highway service area in the low temperature area was monitored and analyzed for six consecutive years covering different seasons. By monitoring the concentration of COD, TN, NH3-N, NO2--N, NO3--N and other indicators in the inlet and outlet water of the system, the TN removal rate was calculated, and the long-term removal of water pollutants in the system was analyzed. In addition, the structural characteristics of the bacterial community in the treatment system were explored through macrogenome sequencing. The research results showed that the treatment effect of the project was stable, and the average effluent COD, TN and NH3-N were 27.72mg/L, 10.54mg/L and 3.66mg/L, respectively, which all had reached the grade A standard of Discharge Standard for Pollutants in Municipal Wastewater Treatment Plant (GB 18918-2002); the key genus for nitrite oxidation in the system was Nitrospira and the genus for anammox bacteria was Candidatus Brocadia, which were the main factors to promote the total nitrogen removal rate of the system to 76.69%; the low-temperature resistant bacteria were Proteus, Bacteroidea and Firmicutes. The research reveals the relationship between the long-term operation effect of multi-media biofilter treatment process in the service area sewage and the characteristics of bacterial community. Accordingly, it is suggested that the process can be further optimized through bacteria screening to promote the development of sewage treatment technology in service areas in China.
CHEN Yao , HUANG Xue-wen , KONG Xiang-yan , LIU Xue-xin , SUN Sheng-kai . Long-term Operation Effect and Bacterial Community Characteristics of Sewage Treatment Facilities in the Service Area[J]. Transport Research, 2022 , 8(4) : 137 -144 . DOI: 10.16503/j.cnki.2095-9931.2022.04.013
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