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Article

The Impact of Bioaugmentation on the Performance and Microbial Community Dynamics of an Industrial-Scale Activated Sludge Sequencing Batch Reactor under Various Loading Shocks of Heavy Oil Refinery Wastewater

1
State Key Laboratory of Multiphase Flow in Power Engineering, School of Chemical Engineering and Technology, Xi’an Jiaotong University, No. 28 Xianning West Road, Xi’an 710049, China
2
State Key Laboratory of Heavy Oil Processing, Beijing Key Lab of Oil & Gas Pollution Control, College of Chemical Engineering and Environment, China University of Petroleum, Beijing 102249, China
3
Shaanxi Key Laboratory of Energy Chemical Process Intensification, School of Chemical Engineering and Technology, Xi’an Jiaotong University, No. 28 Xianning West Road, Xi’an 710049, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Christos S. Akratos
Water 2021, 13(20), 2822; https://doi.org/10.3390/w13202822
Received: 30 August 2021 / Revised: 7 October 2021 / Accepted: 7 October 2021 / Published: 11 October 2021
(This article belongs to the Special Issue Innovative Technologies for Wastewater and Water Treatment)
The stable and efficient operation of the activated sludge sequencing batch reactor (ASSBR) in heavy oil refineries has become an urgent necessity in wastewater biotreatment. Hence, we constructed a green and efficient solid bioaugmentation agent (SBA) to enhance the resistance of the reactor to loading shock. The impact of bioaugmentation on the performance and microbial community dynamics under three patterns of heavy oil refinery wastewater (HORW) loading shock (higher COD, higher toxicity, and higher flow rate) was investigated on an industrial-scale ASSBR. Results showed that the optimal SBA formulation was a ratio and addition of mixed bacteria Bacillus subtillis and Brucella sp., of 3:1 and 3.0%, respectively, and a glucose concentration of 5.0 mg/L. The shock resistance of ASSBR was gradually enhanced and normal performance was restored within 6–7 days by the addition of 0.2% SBA. Additionally, the removal efficiency of chemical oxygen demand and total nitrogen reached 86% and 55%, respectively. Furthermore, we found that Burkholderiaceae (12.9%) was replaced by Pseudomonadaceae (17.1%) in wastewater, and Lachnospiraceae (25.4%) in activated sludge was replaced by Prevotellaceae (35.3%), indicating that the impact of different shocks effectively accelerated the evolution of microbial communities and formed their own unique dominant bacterial families. View Full-Text
Keywords: heavy oil refinery wastewater treatment; activated sludge sequencing batch reactor; loading shocks; bioaugmentation; microbial community diversity; COD and TN removal heavy oil refinery wastewater treatment; activated sludge sequencing batch reactor; loading shocks; bioaugmentation; microbial community diversity; COD and TN removal
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MDPI and ACS Style

Cui, K.; Xu, Q.; Sheng, X.; Meng, Q.; Shang, G.; Ma, Y.; Zhang, Z.; Guo, K. The Impact of Bioaugmentation on the Performance and Microbial Community Dynamics of an Industrial-Scale Activated Sludge Sequencing Batch Reactor under Various Loading Shocks of Heavy Oil Refinery Wastewater. Water 2021, 13, 2822. https://doi.org/10.3390/w13202822

AMA Style

Cui K, Xu Q, Sheng X, Meng Q, Shang G, Ma Y, Zhang Z, Guo K. The Impact of Bioaugmentation on the Performance and Microbial Community Dynamics of an Industrial-Scale Activated Sludge Sequencing Batch Reactor under Various Loading Shocks of Heavy Oil Refinery Wastewater. Water. 2021; 13(20):2822. https://doi.org/10.3390/w13202822

Chicago/Turabian Style

Cui, Kai, Quanshu Xu, Xiaoying Sheng, Qingfan Meng, Gaoyuan Shang, Yingqun Ma, Zhongzhi Zhang, and Kun Guo. 2021. "The Impact of Bioaugmentation on the Performance and Microbial Community Dynamics of an Industrial-Scale Activated Sludge Sequencing Batch Reactor under Various Loading Shocks of Heavy Oil Refinery Wastewater" Water 13, no. 20: 2822. https://doi.org/10.3390/w13202822

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