REMOVAL EFFICIENCY OF OPPORTUNISTIC PATHOGENS AND ORGANIC MATTERS IN SECONDARY EFFLUENT BY SLOW FILTRATION WITH BIOFILM

SUN Lihua; DENG Si; ZHU Junyao; WANG Chunfang; ZHANG Muxi

doi:10.13205/j.hjgc.202403002

Volume 42 Issue 3

Mar. 2024

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2024 > 42(3): 17-24

SUN Lihua, DENG Si, ZHU Junyao, WANG Chunfang, ZHANG Muxi. REMOVAL EFFICIENCY OF OPPORTUNISTIC PATHOGENS AND ORGANIC MATTERS IN SECONDARY EFFLUENT BY SLOW FILTRATION WITH BIOFILM[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(3): 17-24. doi: 10.13205/j.hjgc.202403002

Citation:

SUN Lihua, DENG Si, ZHU Junyao, WANG Chunfang, ZHANG Muxi. REMOVAL EFFICIENCY OF OPPORTUNISTIC PATHOGENS AND ORGANIC MATTERS IN SECONDARY EFFLUENT BY SLOW FILTRATION WITH BIOFILM[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(3): 17-24. doi: 10.13205/j.hjgc.202403002

Citation:

SUN Lihua, DENG Si, ZHU Junyao, WANG Chunfang, ZHANG Muxi. REMOVAL EFFICIENCY OF OPPORTUNISTIC PATHOGENS AND ORGANIC MATTERS IN SECONDARY EFFLUENT BY SLOW FILTRATION WITH BIOFILM[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(3): 17-24. doi: 10.13205/j.hjgc.202403002

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REMOVAL EFFICIENCY OF OPPORTUNISTIC PATHOGENS AND ORGANIC MATTERS IN SECONDARY EFFLUENT BY SLOW FILTRATION WITH BIOFILM

doi: 10.13205/j.hjgc.202403002

1. Key Laboratory of Urban Rainwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;
2. School of Environmental and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;
3. Beijing Dongcheng District Housing and Urban Construction Committee, Beijing 100027, China

Received Date: 2023-01-02
Available Online: 2024-05-31

Abstract

Abstract

The secondary effluent of municipal sewage treatment plants contains a large number of opportunistic pathogens, which poses a potential threat to human health. In this study, the efficacy of the slow filtration process on the removal of opportunistic pathogens (Pseudomonas aeruginosa, Legionella, and Mycobacterium avium) and DOC in water under different operating conditions (influent C/N ratio, Ca²⁺ concentration, pH value) was investigated, and the correlation analysis between the removal of opportunistic pathogens and DOC and E. coli was conducted, respectively. The results showed that under the condition of a filtration rate of 5 cm/h and changing the influent water quality conditions, the effect of biofilm slow filtration on the removal of opportunistic pathogens was greater than that without biofilm slow filtration. When the C/N ratio was 10, Ca²⁺ concentration was 60 mg/L and pH value was 7, the best effect of biofilm slow filtration on the removal of opportunistic pathogens was achieved. Under the optimal operating conditions, the content of opportunistic pathogens in the effluent of biofilm slow filtration was positively correlated with the DOC content; except for the Ca²⁺ concentration, the content of opportunistic pathogens by biofilm slow filtration was positively correlated with E. coli in other operating conditions. In conclusion, the biofilm slow filtration process can effectively remove opportunistic pathogens and organic matter in secondary effluent, which is an effective way to treat the secondary effluent in depth and provide a safety guarantee for the water risk in the reuse process of reclaimed water.
- secondary effluent,
- slow filtration,
- opportunistic pathogens,
- DOC,
- correlation analysis

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References(32)

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