共查询到19条相似文献,搜索用时 218 毫秒
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采用由兼氧塘、好氧塘和水生植物塘串联而成的生态塘系统处理石化废水尾水,在中型试验装置上考察其处理效果及影响因素。结果表明: 经处理后,污水的COD降低率为25%~50%,系统出水的COD稳定在40~50 mg/L范围内,达到GB 18918-2002《城镇污水处理厂污染物排放标准》中的一级A标准中对COD的要求,但石油类物质浓度指标略微超标;温度是影响生态塘系统处理效果的主要因素,净水效果呈季节性变化,温度较高时处理效果较好,其对总氮(TN)去除的影响大于COD和总磷(TP);光照对COD降低率、TP和TN去除率的影响较为相似,最高去除率均出现在16:00左右,夜间三者均出现一定程度的下降。 相似文献
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电芬顿氧化法处理ABS工业废水的实验研究 总被引:1,自引:0,他引:1
采用电芬顿氧化法处理ABS工业装置凝聚干燥单元产生的酸性废水,考察了Fe2浓度和处理时间对废水化学需氧量(COD)去除率的影响,并研究了电芬顿氧化法对废水中有毒、难降解的苯系和有机腈类等主要污染物的分解转化能力.结果表明,在电极板间电流为1A(电流密度为10 mA/cm2),废水pH值为3.0的条件下,当Fe2浓度为0.6 mmol/L时,废水中的COD去除率最高,可以达到45.62%;随着处理时间的延长,废水COD去除率呈增大趋势,且在最初的2h内,增幅较快,后基本稳定;该法能分解转化废水中大量的芳香类污染物. 相似文献
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涤纶碱减量废水的水解酸化预处理试验研究 总被引:1,自引:0,他引:1
涤纶碱减量废水是污染重、处理难度大的新型纺织印染废水。采用安装固定填料、污泥不回流的水解酸化工艺对碱减量废水进行预处理,以增大其可生化性,提高后续工艺的降解效果。实验结果表明:水解酸化预处理可以显著提高碱减量废水的可生化性,当HRT为20.2h时,废水的B/C由预处理前的0.37上升到0.67;当HRT为13.5h时,废水的挥发性脂肪酸(VFA)达到最大值1.23mmol.L6^-1;TA在水解酸化反应器中的降解率较低(小于5%),反应器COD总去除率小于10%;反应器进水容积负荷(UV)和去除容积负荷(Ur)没有表现出一定的相关关系,随Uv的提高,水解酸化池Ur变化很小。 相似文献
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炼油汽提废水经汽提处理后仍含有较高浓度的硫化物和氨氮,对该废水采用装填悬浮填料的两级曝气塔处理。研究了两级曝气塔水力停留时间(HRT)和溶解氧(DO)对特征污染物硫化物和氨氮的去除效果影响,在一级曝气塔HRT≥10.0h,DO≥3.0mg/L时,硫化物去除率大于98%;在二级曝气塔HRT≥8.0h,DO≥2.5mg/L时,氨氮去除率大于88%。 相似文献
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活性炭吸附法处理气田聚磺泥浆钻井废水研究 总被引:5,自引:0,他引:5
采用混凝-二次絮凝-活性炭吸附法深度处理钻井废水。实验取200mL普光301—3井钻井废水,确定了最佳工艺条件:废水吸附pH值为1.5,活性炭加入量40g,吸附时间为1.5h,吸附后出水调整pH值9.0。处理后钻井废水COD去除率大于90%,色度去除率100%。 相似文献
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《石油化工安全环保技术》2017,(2)
中试研究了好氧膨胀床(OEB)反应器处理甲醇制烯烃(MTO)废水的稳定运行过程,考察了COD去除效果、填料层膨胀情况、反应器压降、反应器排泥及其它运行情况。试验过程运行稳定,膨胀填料层负荷在0.5~1.4 kg COD/m~3/d,COD去除率一直稳定在80%以上,DO比耗基本在1~3,而且废水浊度也可以得到明显去除。确认了自主开发的OEB反应器是稳定和有效的,值得进一步优化并推广使用。 相似文献
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针对炼厂加热炉用燃料气中低浓度硫化物,特别是有机硫化物,利用自主研发的深度脱硫吸收剂,考察并优化了超重力吸收脱硫工艺。结果表明:当模拟炼厂燃料气的进气总硫质量浓度为80~100 mg/m3时,在超重力机的床层填料为不锈钢波纹丝网,超重力因子为66,进气量为4 m3/h,液气比(吸收剂循环量与进气量的流量之比)为6 L/m3的最优超重力吸收深度脱硫工艺条件下,燃料气的总硫去除率高达96.4%。在3种进气总硫质量浓度为80~100,50~60,20~30 mg/m3情形下,模拟炼厂燃料气脱硫效果比较稳定,总硫去除率均大于90.1%,出气总硫质量浓度均小于4.62 mg/m3。 相似文献
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Abstract In order to study the character of a Moving Bed Biofilm Reactor (MBBR) in treating petrochemical wastewater, the authors offer the comparison experiment between MBBR and activated sludge process (ASP) regarding such factors as hydraulic retention time (HRT), organic loading rate, and air flow rate. The optimal condition of MBBR is that air flow rate be equal to 1.25 L/min and HRT be equal to 8 hr. Under these conditions, when organic loading rate is about 1.0 kg chemical oxygen demand (COD)/(m3·day), the removal of COD produced by MBBR can reach more than 80%, and the effluent COD from MBBR is less than 50 mg/L. While the organic loading rate reaches the value of 2.0 kg COD/(m3·day), the removal of COD is more than 70%. Under the optimal conditions, the removal of COD produced by MBBR is higher than ASP in all the process. MBBR has stronger capacities regarding the impact of organic loading compared with ASP. 相似文献
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In order to remove the petroleum hydrocarbons in petrochemical wastewater, an airlift inner-loop three-phase fluidized-bed (AITF) bioreactor was designed independently, combining the chemical embedding technique to treat petrochemical wastewater continuously. This biological fluidized bed reactor had an excellent antishock ability on the hydraulic loading capacity and the chemical oxygen demand (COD) loading capacity. Moreover, because the microbial biodegradation of petrochemical wastewater was difficult, the reactor also maintained good potential biodegradation capability, and the average COD removal rate was about 87% and average total petroleum hydrocarbons removal rate was about 95% in the steady continuous stage. The volumetric loading capacity of the AITF bioreactor is two to five times of that of traditional activated sludge methods. 相似文献
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针对一种开有两层相互交错窗孔并带有齿形结构弧片的新型圆筒型填料,在内径为600mm的有机玻璃塔内,采用空气-水物系,研究了它的流体力学性能;在内径为600mm的不锈钢塔内,采用环己烷-正庚烷物系,在常压、全回流的情况下,研究了它的传质性能;在内径为300mm的有机玻璃塔内,研究了分别以圆筒型填料、固定阀塔板和复合塔板为塔内件时脱除工业废水中丙烯腈的效果。实验结果表明,圆筒型填料的齿状结构改善了气液两相在填料层中的微流动和液体分布;与鲍尔环填料相比,当F因子为1.0~3.0kg0.5/(m0.5.s)时,圆筒型填料的干床压降降低了23%~40%;当喷淋密度为20m3/(m2.h)、F因子为1.0kg0.5/(m0.5.s)时,湿床压降降低了约40%;圆筒型填料的液泛点提高;当F因子为1.0~2.5kg0.5/(m0.5.s)时,等板高度比鲍尔环填料降低了11%~20%;当采用圆筒型填料作为塔内件时,丙烯腈脱除率比固定阀塔板高约8%,比复合塔板稳定。 相似文献
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L. Zhidong Ph.D. 《Petroleum Science and Technology》2013,31(3):286-293
Abstract Nitrogen and phosphorus removal from oil refinery wastewater using an integrated submerged membrane bioreactor anaerobic/aerobic (ISMBR-A/O) was investigated in this laboratory study. The objectives were to demonstrate suitability of the membrane bioreactor (MBR) technology to the treatment of refinery wastewater and its ability to achieve nitrogen and phosphorus removal effectively. IMBR-A/O comprised four reactor tanks: an influent tank, anaerobic tank, aerobic tank, and effluent tank. The IMBR-A/O was operated in cycles of four phases: fill, anaerobic, aerobic, and draw. During the fill phase, the influent tank was half-filled with oil refinery wastewater. During the subsequent anaerobic phase, most of the phosphorus release took place from the submerged biofilm in this reactor. In the aerobic phase, the wastewater was circulated by pumps between the influent tank and the anaerobic tank, resulting in denitrification at the start of the aerobic phase due to low oxygen concentrations, followed by nitrification and luxury uptake of phosphorus when oxygen concentrations increased. Ultimately, the treated water flowed from the effluent tank. The results show that the chemical oxygen demand (COD), 5-day biochemical oxygen demand (BOD5), oil, NH+ 4-N, total nitrogen (TN), and total phosphorus (TP) removal efficiencies were 91, 90, 91, 99, 80, and 66%, respectively. 相似文献
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采用碱吸收、液相氧化及固相催化氧化联合工艺处理炼厂酸性水挥发出的恶臭气体,考察了该工艺对恶臭气体主要组分硫化氢(H2S)和挥发性有机化合物(VOCs)的去除效果。结果表明,当恶臭气体中H2S质量浓度为2 000~4 000 mg/m3、VOCs质量浓度为1 500~2 600 mg/m3时,仅通过碱吸收H2S的去除率就可达99%以上,但VOCs的去除率小于5%;同一氧化剂NaClO,H2O2或KMnO4在酸性条件下对恶臭气体中VOCs的氧化去除效果要优于碱性条件下,其中NaClO在酸性条件下最优,VOCs去除率稳定在40%~60%;采用活性炭作为催化氧化的载体能稳定氧化剂对酸性气中VOCs的去除效果,在80℃下,VOCs的平均去除率约为80%。 相似文献
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采用正交试验法对活性硅酸及活性硅酸嫁接单金属离子絮凝剂的制备条件进行了优化,并考察了系列单金属离子絮凝剂对炼油污水的除浊效果。结果表明:制备活性硅酸最佳试验条件为:反应时间4 h,硅酸钠质量分数8%,无机酸质量分数30%,搅拌叶采用五爪形。制备单金属离子絮凝剂最佳试验条件为:反应时间8 h,反应温度25℃,铝盐溶液质量分数5%,硅铝质量比2∶1。与聚合氯化铝、阴、阳离子聚丙烯酰胺常规絮凝剂相比,系列单金属离子絮凝剂对炼油污水具有很好的除浊效果,浊度去除率最高为96.44%,化学需氧量去除率最高为52.0%。 相似文献