Enhanced hydrolyzed polyacrylamide removal from water by an aerobic biofilm reactor-ozone reactor-aerobic biofilm reactor hybrid treatment system: Performance, key enzymes and functional microorganisms

Tianwen Song; Shanshan Li; Jiafeng Jin; Zichao Yin; Yifeng Lu; Mutai Bao; Yang Li

doi:10.1016/j.biortech.2019.121811

Enhanced hydrolyzed polyacrylamide removal from water by an aerobic biofilm reactor-ozone reactor-aerobic biofilm reactor hybrid treatment system: Performance, key enzymes and functional microorganisms

Bioresour Technol. 2019 Nov:291:121811. doi: 10.1016/j.biortech.2019.121811. Epub 2019 Jul 13.

Authors

Tianwen Song¹, Shanshan Li¹, Jiafeng Jin¹, Zichao Yin¹, Yifeng Lu², Mutai Bao³, Yang Li⁴

Affiliations

¹ Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education/Institute for Advanced Ocean Study, Ocean University of China, Qingdao 266100, China; College of Chemistry & Chemical Engineering, Ocean University of China, Qingdao 266100, China.
² Department of Environmental Science, Dalhousie University, Halifax, Nova Scotia, Canada.
³ Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education/Institute for Advanced Ocean Study, Ocean University of China, Qingdao 266100, China; College of Chemistry & Chemical Engineering, Ocean University of China, Qingdao 266100, China. Electronic address: mtbao@ouc.edu.cn.
⁴ Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education/Institute for Advanced Ocean Study, Ocean University of China, Qingdao 266100, China; China Petrochemical Corporation (Sinopec Group), Beijing 100728, China.

PMID: 31344634
DOI: 10.1016/j.biortech.2019.121811

Abstract

Degradation of hydrolyzed polyacrylamide-containing (HPAM-containing) wastewater was investigated in a lab-scale aerobic-ozonic-aerobic hybrid treatment system. When the HPAM concentration was 500 mg L^-1 and the ozone dose was 25 g O₃/g TOC, the HPAM removal rate reached 90.79%. Experimental results obtained from gel permeation chromatography (GPC) and rheometer indicated that the refractory HPAM was decomposed into small-molecule compounds. High performance liquid chromatography (HPLC) analysis showed that there was no acrylamide (AM) in the effluent of the system. Microbial communities in two aerobic biofilm reactors (ABRs) were analyzed by Illumina MiSeq Sequencing, which indicated that norank_f_Cytophagaceae, Meiothermus, Bacillus, etc. were keystone functional bacterial genera and Methanobacterium, norank_p_Bathyarchaeota, norank_c_Marine_Group_Ⅰ, etc. were dominant functional archaeal groups. To our knowledge, this is the first study to treat HPAM-containing wastewater using an aerobic-ozonic-aerobic hybrid process. Good removal efficiencies and presence of functional microorganisms demonstrated that the hybrid treatment system was practical for treating HPAM-containing wastewater.

Keywords: Biodegradation; Enzymatic activity; Hydrolyzed polyacrylamide; Microbial community; Ozonation.

MeSH terms

Acrylic Resins
Biodegradation, Environmental
Biofilms
Bioreactors
Ozone*
Wastewater
Water
Water Purification*

Substances

Acrylic Resins
Waste Water
Water
Ozone
polyacrylamide