YINJian-ping,WANGYuan,WANGFeng,et al.Ozone-SBR-Ozone Combined Process for Treating Petrochemical Reverse Osmosis Concentrate[J].China Water & Wastewater,2025,41(15):135-142.
臭氧-SBR-臭氧组合工艺处理石化反渗透浓水
- Title:
- Ozone-SBR-Ozone Combined Process for Treating Petrochemical Reverse Osmosis Concentrate
- Keywords:
- petrochemical wastewater; reverse osmosis concentrate; ozonation; SBR
- 摘要:
- 采用O3-SBR-O3组合工艺处理石油化学工业反渗透浓水（ROC），考察了废水初始pH、O3浓度和反应时间对O3氧化效果的影响，以及O3预氧化时间对SBR处理效率的影响，并利用三维荧光光谱（EEM）和傅里叶红外光谱（FTIR）探讨了有机物去除机理。结果表明，相比单独SBR，在初始pH为6.98（原水pH）、O3浓度为30 mg/L、预氧化时间为60 min的条件下，O3-SBR工艺对COD的去除率提高了42.5%。O3-SBR出水经O3深度处理90 min后，出水COD、TOC、NH3-N和TN浓度分别为58、18、0.50和2.40 mg/L，满足《石油化学工业污染物排放标准》（GB 31571—2015）要求。EEM结果表明，O3可以去除废水中原有的以及生化后产生的类富里酸和类腐殖酸。FTIR结果表明，O3预氧化可以去除部分酚类和胺类物质，降低废水毒性，提高废水的可生化性。生物处理会生成多糖、酚类、氨基酸类化合物和腐殖酸衍变的芳香族化合物等代谢产物；O3深度处理可以去除溶解性微生物代谢产物，并将芳香族和脂肪族类化合物转化为酯类化合物。
- Abstract:
- The petrochemical reverse osmosis concentrate (ROC) was treated using a combined ozone-sequencing batch reactor-ozone (O3-SBR-O3) process. The effects of initial wastewater pH, O3 concentration, and reaction time on the oxidation efficiency were systematically investigated. Additionally, the impact of pre-oxidation duration with O3 on the treatment efficiency of the SBR was analyzed. Three-dimensional fluorescence spectroscopy (EEM) and Fourier infrared spectroscopy (FTIR) were employed to elucidate the mechanism of organic matter removal. Compared with SBR alone, under the conditions of initial raw wastewater pH of 6.98, O3 concentration of 30 mg/L, and pre?oxidation time of 60 minutes, the COD removal efficiency achieved by the O3-SBR process increased by 42.5%. Following 90 minutes of advanced O3 treatment of the effluent from the O3-SBR process, COD, TOC, NH3-N and TN in the effluent were reduced to 58 mg/L, 18 mg/L, 0.50 mg/L and 2.40 mg/L, respectively, which complied with the requirements specified in Emission Standard of Pollutants for Petroleum Chemical Industry (GB 31571-2015). The EEM results indicated that O-effectively removed both the original fulvic acid and humic acid present in the wastewater, as well as those generated during subsequent biochemical processes. According to the FTIR analysis, O3 pre-oxidation could eliminate certain phenolic and amine compounds, thereby reducing wastewater toxicity and enhancing its biodegradability. Biological treatment could produce metabolic byproducts, including polysaccharides, phenols, amino acid derivatives, and aromatic compounds originating from humic acid. The O3 advanced treatment process effectively removed soluble microbial products while facilitating the transformation of aromatic and aliphatic compounds into ester compounds.
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