Effect of mixed petrochemical wastewater with different effluent sources on anaerobic treatment: organic removal behavio
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RESEARCH ARTICLE
Effect of mixed petrochemical wastewater with different effluent sources on anaerobic treatment: organic removal behaviors and microbial community Dong Wang 1,2 & Chuyun Gao 1,2 & Chenchen Wang 1,2 & Nannan Liu 1,2 & Chunsheng Qiu 1,2 & Jingjie Yu 1,2 & Shaopo Wang 1,2 Received: 22 June 2020 / Accepted: 20 September 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Petrochemical industrial effluent contains industrial wastewater from various manufacturing processes. The mixed treatment of these different petrochemical wastewater effluents may influence the organic removal performance of the anaerobic processes. In this study, three typical petrochemical effluents, including polyester (PE), polyethylene terephthalate, and purified terephthalic acid wastewater, were collected. The effect of the mixed petrochemical wastewater on the organic removal and microbial community structure was investigated in the anaerobic batch assays via spectroscopy and high-throughput sequencing. The organic removal efficiencies were similar (71–85%) in all the batch assays for 90 h acclimation. The mixture of wastewater, especially the addition of PE wastewater, significantly prolonged organic removal process. It was related to the aromatic removal performance and microbial community structure during the mixed wastewater treatment. The microbial community structure in the mixed wastewater batch assay showed high similarity with that in the PE wastewater batch assay. Ignavibacterium, Syntrophus, and Pelotomaculum were crucial to the degradation of aromatic compounds together with Methanosaeta. The mixture of wastewater, especially the addition of PE wastewater, caused the decay of these functional microbes and resulted in the inefficient removal of the aromatic compounds. Keywords Petrochemical wastewater . Wastewater mixture . Anaerobic treatment . Aromatic compounds . Microbial community . Spectrum
Introduction Polyester (PE), polyethylene terephthalate (PET), and purified terephthalic acid (PTA) are typical petrochemical manufacturing materials. Petrochemical wastewater is the commingled effluent produced from the manufacturing of these petrochemical raw materials (Garg and Prasad 2017). Some characteristics, such as high pollutant concentration, toxicity, and refractory, are considered to characterize this type of industrial Responsible editor: Robert Duran * Dong Wang [email protected] 1
Tianjin Key Laboratory of Aquatic Science and Technology, Tianjin 300384, China
2
School of Environmental and Municipal Engineering, Tianjin Chengjian University, No. 26, Jingjing Road, Xiqing District, Tianjin 300384, China
wastewater (Wu et al. 2016). Various methods and technologies, such as adsorption, coagulation–flocculation, advanced oxidation, and biological treatment, are applied to efficiently treat petrochemical wastewater (Verrna et al. 2010; Verma et al. 2014; Garg and Prasad 2017). Anaerobic biological treatment exhibits various advantages for petrochemical wastewater treatment, such
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