PMID- 37757687 OWN - NLM STAT- MEDLINE DCOM- 20231101 LR - 20231101 IS - 1095-8630 (Electronic) IS - 0301-4797 (Linking) VI - 347 DP - 2023 Dec 1 TI - Variations in the dairy wastewater properties and bacterial diversity of each unit in membrane-enclosed anaerobic lagoon treatment process in Heilongjiang Province. PG - 119035 LID - S0301-4797(23)01823-6 [pii] LID - 10.1016/j.jenvman.2023.119035 [doi] AB - In order to meet the land use requirements of the treated wastewater from high density polyethylene (HDPE) membrane-enclosed anaerobic lagoons, the physical and chemical properties of the wastewater in an HDPE membrane-enclosed anaerobic lagoon were measured. The total nitrogen content (TN) in wastewater treated in membrane-enclosed anaerobic lagoons is 3165 and 1510 mg/L in winter and summer respectively. The wastewater can be used as liquid organic fertilizer, partly replacing chemical fertilizer. The safety dosage of the wastewater was 21.48 t/ha for rice and 9.54 t/ha for corn, respectively. Meanwhile, the wastewater has the characteristics of high salt (conductivity>16.0 mS/cm) and high organic matter content (COD>16,900 mg/kg). Therefore, the potential negative effects of the wastewater on soil salinity and pH should be assessed. 16S rRNA was used to investigate the bacterial population structure and assess potential biological risks of land use of the wastewater. The wastewater from lagoon has the least and the most bacterial abundance in summer and winter, respectively. The bacterial diversity of wastewater samples from lagoon is the most. 21 and 24 phyla were detected in winter and summer samples respectively. Clostridium is the absolute dominant bacteria in the summer water samples and the absolute dominant bacteria is Trichococcus in winter water samples. Several animal and plant bacterial pathogens such as Campylobacter, Corynebacterium, Facklamia and Erysipelothrix can be detected in the wastewater samples. More than 70% of pathogenic bacteria such as Campylobacter, Facklamia, Erysipelothrix and Acholeplasma can be removed by lagoon in summer, but only about 99% of Corynebacterium is still in the lagoon (XYH). While more than 60% of Corynebacterium, Facklamia and Erysipelothrix are not removed in winter. So the biological risk of land use of anaerobic pond wastewater needs to be considered. CI - Copyright (c) 2023 Elsevier Ltd. All rights reserved. FAU - Ma, Yuxin AU - Ma Y AD - School of Civil Engineering, Heilongjiang University, Harbin, 150080, PR China; Engineering Research Center of Rural Water Safety of Heilongjiang Province, Heilongjiang University, Harbin, 150080, PR China. Electronic address: oucmyx@126.com. FAU - Shi, Fengmei AU - Shi F AD - Heilongjiang Academy of Black Soil Conservation and Utilization, Heilongjiang Academy of Agricultural Sciences, Harbin, 150086, PR China. FAU - Qian, Sheng AU - Qian S AD - School of Civil Engineering, Heilongjiang University, Harbin, 150080, PR China. FAU - Ma, Jun AU - Ma J AD - State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, PR China. LA - eng PT - Journal Article DEP - 20230925 PL - England TA - J Environ Manage JT - Journal of environmental management JID - 0401664 RN - 0 (Wastewater) RN - 0 (RNA, Ribosomal, 16S) RN - 0 (Fertilizers) RN - 9002-88-4 (Polyethylene) RN - 059QF0KO0R (Water) SB - IM MH - Animals MH - *Wastewater MH - Anaerobiosis MH - RNA, Ribosomal, 16S/genetics MH - *Fertilizers MH - Polyethylene MH - Bacteria/genetics MH - Water OTO - NOTNLM OT - 16S rRNA OT - Bacterial diversity OT - Dairy wastewater OT - Land use OT - Membrane-enclosed anaerobic lagoon COIS- Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. EDAT- 2023/09/28 00:42 MHDA- 2023/11/01 12:42 CRDT- 2023/09/27 18:09 PHST- 2023/04/05 00:00 [received] PHST- 2023/08/06 00:00 [revised] PHST- 2023/09/17 00:00 [accepted] PHST- 2023/11/01 12:42 [medline] PHST- 2023/09/28 00:42 [pubmed] PHST- 2023/09/27 18:09 [entrez] AID - S0301-4797(23)01823-6 [pii] AID - 10.1016/j.jenvman.2023.119035 [doi] PST - ppublish SO - J Environ Manage. 2023 Dec 1;347:119035. doi: 10.1016/j.jenvman.2023.119035. Epub 2023 Sep 25.