Dynamic relationship between dissolved organic matter and soluble microbial products during wastewater treatment

Tang，Gang1,2; Li，Xiaolin2; Wang，Zi3; Wang，Kai1,4; Li，Binrui1,5; Liu，Chongxuan1; Zheng，Xing2

2021-10-01

10.1016/j.jclepro.2021.128448

Journal of Cleaner Production   影响因子和分区

0959-6526

1879-1786

Dynamics of the dissolved organic matter (DOM) and soluble microbial products (SMP) significantly affected the sustainability of wastewater treatment plants and effluent qualities. In this study, the origin, transformation, and seasonal variation of DOM components in the anaerobic/anoxic/oxic (AO) units were illustrated with fluorescence analysis. Results show that the anaerobic process transformed humic acid-like substances (HA) and SMP into fulvic acid-like substances (FA) and aromatic proteins (AP), which indicated the decomposition of macromolecules. In cold seasons, the anoxic process turned AP to HA, SMP, and FA; but the oxic process reversed the transformation. In warm seasons, 6.0% of AP decreased while 3.1% of HA, 1.8% of SMP, and 1.0% of FA increased during the oxic process. Proteobacteria strains were isolated from the activated sludge to stimulate the SMP generation, it was found higher temperature facilitated the transformation of FA and HA (humics) to SMP and AP (proteins), which resulted more proteins presented in the wastewater DOM. These findings indicated that the treatment efficiency and DOM quality in AO processes were influenced by influent quality and/or temperature conditions, and highlighted the generation of SMP by sludge microorganisms, based on which the corresponding strategies considering the seasonal DOM/SMP dynamics were recommended for the stringent regulation of effluents and the sustainability of the receiving water bodies. Besides, the overall fluorescence intensity was positively correlated with the quantified biopolymer contents in SMP, implying the potential of using the fluorescence-derived information to indicate more quantified DOM properties.

Dissolved organic matter Fluorescence-molecular size correlation Proteobacteria Seasonal variation Soluble microbial product Temperature effect

EI ; SCI

英语

第一

National Natural Science Foundation of China[51738012,51878555,91747206] ; Shaanxi International Cooperation Foundation[2017KW-041] ; Department of Science and Technology of Guangdong Province[2017ZT07Z479]

Science & Technology - Other Topics ; Engineering ; Environmental Sciences & Ecology

Green & Sustainable Science & Technology ; Engineering, Environmental ; Environmental Sciences

WOS:000723160200004

ELSEVIER SCI LTD

20213110701869

Activated sludge process ; Biogeochemistry ; Dissolution ; Effluents ; Fluorescence ; Proteins ; Reclamation ; Sustainable development ; Thermal effects ; Wastewater treatment ; Water quality

Water Analysis:445.2 ; Sewage Treatment:452.2 ; Industrial Wastes:452.3 ; Industrial Wastes Treatment and Disposal:452.4 ; Geochemistry:481.2 ; Heat and Mass Transfer; Thermodynamics:641 ; Light/Optics:741.1 ; Biochemistry:801.2 ; Chemical Operations:802.3 ; Organic Compounds:804.1 ; Materials Science:951

2-s2.0-85111283053

Scopus

1.State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control,School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.State Key Laboratory of Eco-hydraulics in Northwest Arid Region,Xi'an University of Technology,Xi'an,710048,China
3.National Supervision & Inspection Center of Environmental Protection Equipment Quality (Jiangsu),Yixing,214205,China
4.Organic Geochemistry Unit,School of Earth Sciences,Zhejiang University,Hangzhou,310027,China
5.School of Environment,China University of Geosciences,Wuhan,430074,China

Tang，Gang,Li，Xiaolin,Wang，Zi,et al. Dynamic relationship between dissolved organic matter and soluble microbial products during wastewater treatment[J]. Journal of Cleaner Production,2021,317.

Tang，Gang.,Li，Xiaolin.,Wang，Zi.,Wang，Kai.,Li，Binrui.,...&Zheng，Xing.(2021).Dynamic relationship between dissolved organic matter and soluble microbial products during wastewater treatment.Journal of Cleaner Production,317.

Tang，Gang,et al."Dynamic relationship between dissolved organic matter and soluble microbial products during wastewater treatment".Journal of Cleaner Production 317(2021).