SMBBR处理焦化废水性能及菌群结构响应关系

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Abstract In this paper, a specific moving bed biofilm reactor (SMBBR), was engaged to treat the coking wastewater with its treatment performance being monitored continuously. The response relation between pollutants degradation and biofilm flora structure was illustrated by HS-GC/MS and Illumina high-throughput sequencing, and the influence of wastewater variables on microbial flora structure was analyzed by CCA. Results showed that the total phenol removal rate was 96.62percent when the system was operated stably for 50days, the thiocyanide and cyanide were completely degraded at 100days, phenol, thiocyanide and cyanide had toxic inhibition on NH₄⁺-N degradation. HS-GC/MS results exhibited that after the aerobic treatment more than 80percent of the organic pollutants, including all phenols, partially the N, O heterocyclic compounds and long-chain alkanes were removed. The sequencing results displayed that there existed difference in the biofilm flora abundance and diversity based on the change of the reaction time. Proteobacteria, which promotes the degradation of phenol, had the highest relative abundance during the reaction. The dominant genera were norank_f_ODP1230B8.23, unclassified_o_Micrococcales, and norank_f_Anaerolineaceae. In addition, Thauera, Ottowia, unclassified_o_Rhizobiales and Thiobacillus proved to be the dominant degrading bacterium of phenol, SCN^- and CN^-in the system. CCA analysis exhibited that the pH value is the most positively correlated with Nitrospira, and effective pH control can contribute to the stable operation of the nitrification reaction. All these provide a theoretical basis for the biofilm treatment of the coking wastewater.

Key words： SMBBR coking wastewater aerobic degradation microbial structure wastewater variable

Received: 18 February 2019

PACS:

X703.1

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	Articles by authors
	LI Wei-ping
	HAO Meng-ying
	JING Shuang-yi
	YU Ling-hong
	SUN Yan-bai
	YANG Wen-huan

Cite this article:

LI Wei-ping,HAO Meng-ying,JING Shuang-yi等. Performance and flora structure response relation in the SMBBR treatment of the coking wastewater[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(8): 3332-3339.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I8/3332

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