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Effects of Fe(Ⅱ) and Se(Ⅵ) on Anaerobic Treatment of APMP Wastewater and Evolution of Microbial Community
Received:January 31, 2023  
DOI：10.11980/j.issn.0254-508X.2023.09.010
Key Words:alkaline peroxide mechanical pulp  anaerobic biological treatment  Fe（Ⅱ）  Se（Ⅵ）  microbial community analysis
Author NameAffiliationPostcode
LIU Meichen College of Ecology and Environment， Zhengzhou University， Zhengzhou， He’nan Province， 450001 450001
MAI Wenning College of Ecology and Environment， Zhengzhou University， Zhengzhou， He’nan Province， 450001 450001
YUE Ximing College of Ecology and Environment， Zhengzhou University， Zhengzhou， He’nan Province， 450001
He’nan Eco-environmental Sewage Purification Engineering Technology Research Center， He’nan Junhe Environmental Protection Technology Co.， Ltd.， Zhengzhou， He’nan Province， 450000 		450000
LIANG Jiawei He’nan Eco-environmental Sewage Purification Engineering Technology Research Center， He’nan Junhe Environmental Protection Technology Co.， Ltd.， Zhengzhou， He’nan Province， 450000
College of Public Health， Zhengzhou University， Zhengzhou， He’nan Province， 450001 		450001
DAI Jihua* He’nan Eco-environmental Sewage Purification Engineering Technology Research Center， He’nan Junhe Environmental Protection Technology Co.， Ltd.， Zhengzhou， He’nan Province， 450000 450000
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Abstract:Taking the wastewater from alkaline peroxide mechanical pulp （APMP） production as an object， two sets of laboratory anaerobic reactor devices （control group R1， test group R2） were used to study the effects of trace elements like ferrum （Fe（Ⅱ）） and selenium （Se（Ⅵ）） on the performance of anaerobic reactor and the evolution of microbial community. The results showed that the CODCr removal rate in R2 was （78 ± 4.5）% on average， with the CODCr removal rate of （67±6.4）% in R1， when the volume loading rate of anaerobic reactor changed from 3.3 kgCODCr/（m³·d） increasing to 16.0 kgCODCr/（m³·d）， gradually. The ratio of volatile fatty acid （VFA） to alkalinity （ALK） showed R2<R1<0.3， which indicated that R2 system was more stable. At the end of the experiment， the content of coenzyme F420 in R1 and R2 increased by 12.6% and 19.6%， respectively， compared with that at the beginning. The MLVSS/TSS （V/T） reached 66.9% and 68.2% respectively， and the size of granular sludge in R1 was smaller than that in R2. High throughput sequencing results showed that the addition of Fe（Ⅱ）and Se（Ⅵ）could promote the growth of microorganisms in the anaerobic system， improving the relative abundance of species， and have a positive effect on the treatment effect of the anaerobic system and the growth and reproduction of dominant bacteria.
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