Mechanistic insight into the biofilm formation and process performance of a passive aeration ditch (PAD) for decentralized wastewater treatment

Li, Jibin1; Ma, Jinxing1,2; Sun, Li1; Liu, Xin3; Liao, Huaiyu1; He, Di1,2

2022-07-01

10.1007/s11783-021-1494-3

Frontiers of Environmental Science & Engineering   影响因子和分区

2095-2201

2095-221X

Decentralized wastewater containing elevated salinity is an emerging threat to the local environment and sanitation in remote coastal communities. Regarding the cost and treatment efficiencies, we propose a passive aeration ditch (PAD) using non-woven polyester fabric as a feasible bubbleless aerator and biofilm carrier for wastewater treatment. Consideration has been first given to PAD's efficacy in treating saline decentralized wastewater, and then to the impact of chemical oxygen demand-to-nitrogen (C/N) ratio and salinity on biofilm formation. A multispecies model incorporating the salinity effect has been developed to depict the system performance and predict the microbial community. Results showed that the PAD system had great capacity for pollutants removal. The biofilm thickness increased at a higher C/N ratio because of the boost of aerobic heterotrophs and denitrifying bacteria, which consequently improved the COD and total nitrogen removal. However, this led to the deterioration of ammonia removal. Moreover, while a higher salinity benefited the biofilm growth, the contaminant removal efficiencies decreased because the salinity inhibited the activity of aerobic heterotrophs and reduced the abundance of nitrifying bacteria inside the biofilm. Based on the model simulation, feed water with salinity below 2% and C/N ratio in a range of 1 to 3 forms a biofilm that can reach relatively high organic matter and ammonia removal. These findings not only show the feasibility of PAD in treatment of saline decentralized wastewater, but also offer a systematic strategy to predict and optimize the process performance. (C) Higher Education Press 2021

Decentralized wastewater Passive aeration ditch Biofilm formation C/N ratio Salinity Model simulation

SCI ; EI

英语

其他

Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) (China)[GML2019ZD0403] ; Program for Guangdong Introducing Innovative and Entrepreneurial Teams (China)[2019ZT08L213] ; China Postdoctoral Science Foundation[2020M672540] ; Guangdong Basic and Applied Basic Research Fund (China)[2020A1515110309]

Engineering ; Environmental Sciences & Ecology

Engineering, Environmental ; Environmental Sciences

WOS:000715029300001

HIGHER EDUCATION PRESS

20214611144547

Aerobic bacteria ; Ammonia ; Chemical oxygen demand ; Denitrification ; Deterioration ; Efficiency ; Nitrification ; Nitrogen removal ; Wastewater treatment ; Weaving

Industrial Wastes Treatment and Disposal:452.4 ; Bioengineering and Biology:461 ; Biomaterials (including synthetics):462.5 ; Chemical Reactions:802.2 ; Inorganic Compounds:804.2 ; Textile Products and Processing:819.5 ; Production Engineering:913.1 ; Materials Science:951

2-s2.0-85118712369

Web of Science

1.Guangdong Univ Technol, Inst Environm & Ecol Engn, Key Lab City Cluster Environm Safety & Green Dev, Minist Educ, Guangzhou 510006, Peoples R China
2.Southern Marine Sci & Engn Guangdong Lab Guangzho, Guangzhou 511458, Peoples R China
3.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen 518055, Peoples R China

Li, Jibin,Ma, Jinxing,Sun, Li,et al. Mechanistic insight into the biofilm formation and process performance of a passive aeration ditch (PAD) for decentralized wastewater treatment[J]. Frontiers of Environmental Science & Engineering,2022,16(7).

Li, Jibin,Ma, Jinxing,Sun, Li,Liu, Xin,Liao, Huaiyu,&He, Di.(2022).Mechanistic insight into the biofilm formation and process performance of a passive aeration ditch (PAD) for decentralized wastewater treatment.Frontiers of Environmental Science & Engineering,16(7).

Li, Jibin,et al."Mechanistic insight into the biofilm formation and process performance of a passive aeration ditch (PAD) for decentralized wastewater treatment".Frontiers of Environmental Science & Engineering 16.7(2022).