YUANWei-bo,ZHAOWei-xin,LIUYan-ping,et al.Micro-oxygen Hydrolysis Acidification for Improving Biodegradability of Petrochemical Wastewater[J].China Water & Wastewater,2024,40(11):109-114.
Micro-oxygen Hydrolysis Acidification for Improving Biodegradability of Petrochemical Wastewater
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第11期
Page:
109-114
Column:
Date of publication:
2024-06-01
- Keywords:
- petrochemical wastewater; micro-aerobic hydrolysis acidification; biodegradability; volatile fatty acid
- Abstract:
- This paper investigated the impact of micro-oxygen hydrolysis acidification pretreatment parameters on COD, BOD5, B/C, VFAs, UV254 and other indicators of chemical wastewater from a chemical industry park by setting different aeration intensities, and analyzed the mechanism of micro-oxygen hydrolysis pretreatment for enhancing the petrochemical wastewater biochemical degradability through the composition of the microbial community and the properties of dissolved organic matters in the reactor, so as to enhance the pre-treatment efficiency of the petrochemical wastewater. The micro-oxygen aeration effectively enhanced the hydrolysis acidification of petrochemical wastewater. At an aeration rate of 0.2 L/h, the B/C ratio of petrochemical wastewater increased by 0.07. Compared to anaerobic hydrolysis, the COD removal rate of petrochemical wastewater in micro-oxygen hydrolysis process was increased by 20.62%. The three-dimensional fluorescence spectra revealed that the recalcitrant substances gradually degraded into polysaccharide-like substances as micro-oxygen aeration progressed. The high-throughput sequencing results demonstrated that micro-oxygen aeration enhanced the abundance of Proteobacteria and Actinobacteria in hydrolyzing acidification bacteria, thereby improving the pretreatment efficiency of hydrolysis acidification.
Last Update:
2024-06-01