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1.
Abstract A 55-day experimental study was conducted to investigate the treatment process of oil refinery wastewater using submerged membrane bioreactor (MBR) technology. The results showed that the removal rates for chemical oxygen demand (COD) and 5-day biochemical oxygen demand (BOD5) were stable and averaged 92%. The average removal rates for NH3-N, oil, and turbidity were shown to be 93.7%, 75.3%, and 94.6%, respectively. The removal rates for total phosphorus (TP), total suspended solids (TSS), suspended solids (SS), and phenol were shown to be greater than 98.5%, 97.9%, 93.8%, and 99.9%, respectively. This demonstrated that MBR technology had superior treatment effect on the above contaminants. During the 55-day operation, there was no trace of contamination on the membrane. This illustrated that the polyvinylidene fluoride (PVDF) flat sheet membrane manufactured by Toray Industries (Tokyo, Japan) had the ability to resist contamination. 相似文献
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为了提高炼厂污水生化处理能力,长庆石化公司采用膜生物反应器技术(MBR)与生化A/O(缺氧/好氧)工艺相结合,处理装置生产中产生的炼油废水。应用结果表明,在工艺控制平稳的情况下,采用膜生物反应器处理含油废水,加快加大了生物处理能力,能有效的降低炼油废水中各种污染物含量,达到污水处理后直接回用或进一步深度处理后回用,实现污水的资源化利用。 相似文献
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HRT对UASB-SMBR(PTFE)组合工艺处理某油田含油废水性能的影响 总被引:1,自引:0,他引:1
利用升流式厌氧污泥床(UASB)与膜生物反应器(MBR)组合工艺处理含油废水,在不同的水力停留时间(HRT)下考察了系统对NH3-N、石油类污染物和挥发酚去除以及COD和浊度降低的效果,也考察了膜污染和清洗情况。结果表明,该组合工艺对各种污染物质都有很好的去除效果,出水水质能够满足国家污水综合排放一级标准, NH3-N、石油类污染物、挥发酚的平均去除率以及CO和浊度的降低率分别达到98.58%、98.33%、99.83%、95.00%和99.84%;污染物的去除效率随着水力停留时间的缩而降低。在实验过程中还发现,在不同水力停留时间下会产生不同程度的膜污染,且水力停留时间的长短与膜染的速率呈反相关关系;采用四步法清洗后,聚四氟乙烯(PTFE)膜的透水性基本完全恢复。UASB-SMBR(PTFE)组合工艺能够稳定运用于含油废水的处理。 相似文献
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炼油污水厂中的中水回用浓水和反渗透浓水的无机盐类含量高、硬度高、可生化性差.将中水回用浓水和反渗透浓水与污水处理场出水混合处理,采用调节罐+高密度沉淀池+臭氧催化氧化池+改良多级曝气生物滤池+微砂加炭高效沉淀池的工艺流程,处理后出水能够达到DB 61/224—2018《陕西省黄河流域污水综合排放标准》中的指标A标准.运... 相似文献
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In this study, performance of a full-scale combined treatment plant for oilfield wastewater from alkaline/surfactant/polymer flooding was investigated. The combined process consisted of chemical coagulation, hydrolysis/acidification, and bio-contact oxidation. The experimental results demonstrated that chemical coagulation treatment with polymeric ferric sulfate proved to be the most effective in removing the chemical oxygen demand (>80%) from the wastewater under the dosage of 600 mg/m3. The highest acidification efficiency in hydrolysis acidification tank was 25.8% at hydraulic retention time of 20 h. The average values of chemical oxygen demand, biochemical oxygen demand, oil, and NH3-N of the combined process could be reduced to 116, 19, 4, 11, and 20 mg/L, respectively. The final effluent could meet the class II national wastewater discharge standard of petrochemical industry of China. 相似文献
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Wastewater from super viscous oil processing cannot be effectively treated by conventional wastewater treatment plants in refineries because of its high concentration of various organic pollutants. In order to resolve this problem, a number of investigations were conducted in our work to understand the physicochemical properties, sedimentation, demulsification and pretreatment of such super viscous oil refinery wastewater. The results showed that the key issues for pretreatment of this wastewater were: (1) Optimized process parameters were used in the sedimentation and demulsification processes for oil removal to effectively recover oil and remove scum from wastewater; (2) A suitable flocculation process was selected to minimize oil, suspended solids (SS) and chemical oxygen demand (CODcr). A pretreatment process including three continuous steps: oil removal by sedimentation, oil removal by demulsification, and flotation separation, was proposed and applied in Liaohe Petrochemical Company, PetroChina and the oil content in effluents was less than 200 mg/L and CODcr less than 2,500 mg/L, which completely met the requirement for influent of the conventional wastewater treatment plant, and the recovered super viscous oil reached 5,873 tons in the initial year in Liaohe Petrochemical Company, PetroChina. 相似文献
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元坝气田污水处理厂蒸发母液为三效蒸发系统粗盐结晶后的残液,是复杂组分共存的高盐废水,处理难度极大。研究拟对蒸发母液进行深度处理,通过工艺比选和优化后,蒸发母液经过混凝沉降、CaCl2除SO2-4、UV+H2O2协同氧化除有机物的组合工艺处理后,出水水质为ρ(固体悬浮物)<50 mg/L,ρ(SO2-4)为4 200 mg/L,TOC值为459.25 mg/L。出水水质达到厂区采出水处理工艺进水水质要求,可回到厂区水处理工艺及装置进行处理,能有效解决母液处理和积压的难题。该组合处理工艺流程短、简单易维护,在一定程度上实现了蒸发母液的近零排放。 相似文献
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Abstract In order to remove hydrogen sulfide from petroleum refinery, a fixed-bed bioreactor was constructed by the immobilized Thiobacillus ferrooxidans (T.f) with H-3 carrier. In the state of bioreactor operation, a maximum Fe2+ oxidation of 7.24 g/L.h was attained with the aeration of 300 L/h, the dilution rate of 0.6 h?1, the pH of 2.0, and the temperature of 30°C. And the complex compound forming on the surface of the carrier in the operation of bioreactor was identified as jarosite by chemical analysis and X-ray diffraction analysis. In the fixed-bed bioreactor, the removal of hydrogen sulfide was higher than 99.12%, and the content of H2S in the exhaust was less than 10 μg/g. 相似文献
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Abstract The biofilter is one of the most important biological processes applied to treat wastewater. Research on a pilot-scale biofilter treatment of petrochemical wastewater was performed. The volume of biofilter was 1.2 L. In the experiment, the performance is measured with activated carbon, zeolite, and architecture ceramics and engineering ceramics being respectively filled in the biofilter. Hydraulic retention time (HRT), the rate of gas flow, organic loading of influent were examined in the experiment. Experimental results also showed that the optimum process conditions are follows: HRT = 1.5 hr, rate of gas flow 0.29 L/min, and organic loading of 0.74–1.85 kg/(m3 · d). The result showed that the biofilter system exhibits a good effect on chemical oxygen demand (COD), NH3-N (ammonia nitrate) and turbidity removal, when engineering ceramics is used as packing bed of biofilter. The effluent quality can meet the standard for wastewater use. 相似文献
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流态化复合载体生物膜(FCBR)工艺使用中国石化石油化工科学研究院专利复合载体,可使生化反应器中的微生物浓度较常规流态化生物膜工艺增加近1倍,有效提高了生化处理能力和抗水质冲击能力,适用于处理高含盐炼油污水。某炼油厂的现场连续试验结果表明,在水力停留时间仅为厂内现有生化处理单元50%的情况下(20h),当进水COD质量浓度为185~620mg?L、氨氮质量浓度为18~60mg?L时,FCBR出水的COD质量浓度可降至150mg?L以下,氨氮质量浓度不超过11mg?L,悬浮物质量浓度基本不超过80mg?L,处理效果明显优于现有生化单元,同时具有较强的抗水质冲击能力,可稳定满足后续催化氧化单元的要求,具有工业化应用前景。 相似文献
11.
Huae Fu 《Petroleum Science and Technology》2017,35(17):1743-1749
An integrated process was developed for treating an oilfield fracturing wastewater. Under the optimum conditions, the removal efficiencies of chemical oxygen demand, suspended solids (SS), and oil were higher than 98%, and the quality of the final effluent could satisfy the national discharge standard of China. The oxidation process significantly reduced the viscosity and altered the chemical structures of organics in the wastewater. The coagulation process removed a considerable proportion of SS associated with particulate organic matter. The upflow anaerobic sludge bed and biological aerated filter processes played an important role in the post-polish treatment of the wastewater. 相似文献
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采用磷酸铵镁沉淀法和序列间歇式活性污泥法(SBR)协同处理高含磷检修废水,研究了磷酸铵镁反应中pH值、磷氮摩尔比、镁磷摩尔比等反应因素对高磷检修废水除磷效果的影响。结果表明,当反应中pH=9.5,n(Mg)∶n(P)∶n(N)=1.5∶1∶1时,高含磷检修废水总磷去除效果最佳,去除率可达到98%以上。采用该工艺对污水处理场高磷检修废水进行现场除磷预处理,总磷浓度由256 mg/L降至2.51 mg/L,总磷去除率达99%,效果显著。进一步SBR生化处理后,出水的pH值、COD、NH3-N、TP和SS等各项指标均符合GB 8978—1996《废水综合排放标准》一级标准,达到了预期的处理目标。 相似文献
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D. Skban Ibrahim P. Seethala Devi C. Veerababhu 《Petroleum Science and Technology》2013,31(16):1932-1939
The electrooxidation as a new treatment technology for the purification of petroleum refinery wastewater was used. About 85% COD reduction and complete removal of total petroleum hydrocarbon was achieved for the optimal conditions of current density 30 mA/cm2, pH 8, supporting electrolyte 4 g/L, flow rate 120 LPH, and treatment time 24 min using tubular electrochemical reactor. The result shows the applicability of electrochemical technology as an alternative for recycle and reuse of petroleum refinery wastewater. This technology decreases the time required for treating the petroleum effluent, the volume of consumed water, and discharged wastewater. 相似文献
14.
Jiahao Liang Chunmao Chen Brandon A. Yoz Ying Liang Jin Li Ming Ke Qinghong Wang 《石油科学(英文版)》2019,(2):428-438
The cost-effective treatment of activated sludge that is generated by refining petroleum is a challenging industrial problem. In this study, semi-continuous stirred tank reactors (CSTRs) containing petroleum refinery excess activated sludge (PREAS) were used to comparatively investigate hydrolysis and acidification rates, after the addition of heneicosane (C21H44) (R1) and 1-phenylnaphthalene (C16H12) (R2) to different and individual reactors. Operation of the reactors using a sludge retention time (SRT) of 6 days and a pH of 5.0, resulted in the maintenance of stable biological activity as determined by soluble chemical oxygen demand (SCOD), volatile fatty acids (VFAs) production and oil removal efficiency. The optimum conditions for hydrogen production include a SRT of 8 days, at pH 6.5. Under these conditions, hydrogen production rates in the control containing only PREAS were 1567 mL/L (R0), compared with 1365 mL/L in R1 and 1454 mL/L-PREAS in R2. Coprothermobacter, Fervidobacterium, Caldisericum and Tepidiphilus were the dominant bacterial genera that have the potential to degrade petroleum compounds and generate VFAs. This study has shown that high concentrations of heneicosane and 1-phenylnaphthalene did not inhibit the hydrolytic acidification of PREAS. 相似文献
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高浓度污水水质平稳是炼油厂实现污水稳定达标排放的关键。通过对南方某大型炼油厂高浓度污水处理系统各工段冲击状态的进出水水质进行全面分析,发现碱渣湿式氧化工段出水中酚和硫化物、污水除油工段出水含油均超过设计要求,生化过程溶氧偏低,导致高浓度污水处理系统冲击状态水质较差。针对发现的问题,提出了相应的解决方案。 相似文献
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为解决炼油企业高浓度污水经"隔油+气浮+生化"的传统工艺处理时外排水难以稳定达标的问题,针对该类污水难生物降解的特点,采用"催化氧化+曝气生物滤池"组合处理工艺进行了中试研究。结果表明,利用·OH强氧化反应处理的污水经曝气生物滤池生化处理后,出水中COD、氨氮浓度、油浓度、悬浮物浓度的平均值分别为51.2,5.3,2.3,27 mg/L,COD降低率为83.1%,氨氮、油和悬浮物的平均去除率分别为80.1%,73.4%,61.6%,主要水质指标均达到国家一级排放标准。该技术不需改建炼油厂现有污水处理系统,可实现工业化应用。 相似文献
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Y. Zhao Q.-S. Yang Z. Y.-B. Zhou Y.-X. Wang Q. Zhao B.-H. Li 《Petroleum Science and Technology》2013,31(8):922-929
The potential of biological degradation of refinery spent caustic is evaluated in this study, including effects of operating parameters such as pH of influent stream, salinity, and air flowrate on the biotreatment of the spent caustic process. The results show that the sequence batch reactor process by using domesticated activated sludge has an effective biodegradability on refinery spent caustic. The chemical oxygen demand (COD) removal efficiency reached above 80% with an initial COD value of 1000 mg/L, and the degradation rate of sulfide was over 95%. Meanwhile the organic components of the spent caustic were completely biodegraded within one cycle time. 相似文献