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Shunni Zhu Jinren Ni 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》2008,83(3):317-324
BACKGROUND: Coking wastewater is a major pollutant, produced in large quantities in many countries worldwide. This study investigates the performance of a combined system for treating coking wastewater. The system is based on an upflow blanket filter (UBF) with a biological aerated filter (BAF). Efficiency is assessed according to organic pollutants and nitrogen removal. RESULTS: It was found that hydraulic retention time (HRT) had a greater influence on the removal efficiency of NH3‐N than chemical oxygen demand (COD). The BAF facilitated simultaneous carbonaceous removal and nitrification, depending on the reactor height. The system removed 81.5% of COD and 96.4% of NH3‐N when the total HRT was 46.7 h (15.4 h for UBF and 31.3 h for BAF). Gas chromatography/mass spectrometry analysis indicated that the main components of the coking wastewater were phenols and nitrogenous heterocyclic compounds. Certain refractory compounds decomposed in the anaerobic section, resulting in the production of intermediates. Although most organics present in the influent were absent from the final effluent, a few residual contaminants could not be fully eliminated by the system. CONCLUSION: The experimental results show that the present system is feasible for the treatment of coking wastewater. Copyright © 2007 Society of Chemical Industry 相似文献
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退浆废水碱性强、可生化性差,采用传统的活性污泥工艺处理很难获得满意的效果,为此重点研究了处理退浆废水时UBF厌氧反应器的启动及除污效能。试验结果表明,在中温[(35±3)℃]、进水COD为2 000 mg/L左右、HRT为24 h、有机负荷为2.0 kgCOD/(m3.d)、pH值为7.6左右的情况下约2个月就可启动成功,且对COD的去除率稳定,并培养出了能适应水质要求的厌氧颗粒污泥。经对YDT弹性填料和组合填料的挂膜进行比较发现:组合填料较YDT弹性填料挂膜快、三相分离效果好,对COD的去除率提高了2%~8%。 相似文献
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预处理/UBF/接触氧化/BAF处理抗生素制药废水 总被引:2,自引:2,他引:0
针对化学合成抗生素制药废水成分复杂、有机物和含盐量高的特点,先进行共沸蒸馏/二效逆流蒸发物化预处理,而后采用UBF/接触氧化/BAF工艺处理。工程实践表明,物化预处理可有效降低废水中有机物和盐分的含量,有利于后续生化处理;系统调试3个月后,在进水COD为7003~11087mg/L的情况下,缓慢增加UBF、接触氧化塔、BAF的容积负荷,对COD的平均去除率分别达到88.82%、50.09%和40.91%,出水COD〈300mg/L,达到《污水综合排放标准》(GB8978-1996)的二级标准。 相似文献
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上流式厌氧生物滤池处理高含盐废水的试验研究 总被引:10,自引:0,他引:10
对利用上流式厌氧生物滤池反应器(Upflow anaerobic Biofilter,UBF)处理高含盐有机废水的情况进行了试验研究.结果表明,在容积负荷4 kgCOD/(m3- d),进水氯离子浓度在3 000 mg/L,水力停留时间24 h时,COD去除效率达到85%左右. 相似文献
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化学合成制药废水生物毒性大、可生化性差,属高浓度难降解有机废水,采用高级氧化-铁碳微电解-ABR-UBF-好氧工艺进行处理,工程实践表明,该工艺处理效果稳定可靠,出水COD在300mg·L~(-1)以下,出水水质完全达到污水综合排放标准(GB8978-1996)中二级排放标准. 相似文献
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高浓度中药提取废水的治理技术 总被引:3,自引:1,他引:3
采用气浮 UBF CASS工艺处理高浓度中药提取废水,实践表明,出水水质满足《污水综合排放标准》(GB8978—1996)的一级标准。 相似文献