共查询到19条相似文献,搜索用时 125 毫秒
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利用新型臭氧-炭滤-消毒-砂滤组合净水工艺处理北江微污染原水,研究了上流式曝气生物活性炭滤池的启动情况。试验结果表明,上流式曝气生物活性炭滤池气水体积比为0.2:1,启动20 d后,对氨氮的去除率稳定在79%左右,滤池挂膜成功;采用两段式气水混合反冲洗方式,反冲洗周期3~5 d,可有效控制水头损失,维持滤池稳定运行。上流式曝气生物活性炭滤池启动完成后,试验系统最终出水CODMn、氨氮、亚硝氮、浊度均达到生活饮用水卫生标准(GB 5749-2006)和饮用净水水质标准(CJ 94-2005)。 相似文献
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该文针对闵行水厂前置生物活性炭和后置生物活性炭两条生产线路,通过比较冬、春、夏各季节各工艺段出水有机物综合指标(总有机碳和UV254)变化情况,研究了有机物在臭氧-生物活性炭联用工艺中的去除效果,同时比较活性炭滤池与V型砂滤池相对位置的变化对原水中有机污染物处理效果的影响。 相似文献
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Biological denitrification of nitrate-containing waste water and ground water. The differing objectives serve to distinguish processes for the treatment of waste water and those for the production of drinking water. In waste water purification, frequent use is made of submerged reactors with deposition and recycling of bacteria. The carbon compounds required by the bacteria are either present in the water or have to be added. If the nitrogen is present as ammonium in the waste water, then there are several different ways of combining nitrification and denitrification reactors. In production of drinking water, both heterotrophic and autotrophic bacteria are used. Since the bacteria are not allowed to enter the supply network, fixed reactors or other reactors with immobilised biomass are used. Sand bed filters are still necessary to retain compounds from the water after denitrification. 相似文献
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文章对给水厂常规净水工艺进行了探讨,并指出预处理和深度处理技术是改善饮用水水质的有效途径,为微污染原水的净水工艺选择提供了思路。 相似文献
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自来水厂采用臭氧化工艺时臭氧投加量通常由生产经验判断确定,缺乏一定的准确性和时效性。根据浙江省T水厂150组实际运行样本数据,选用BP神经网络构建臭氧投加系统的前馈控制模型,能够在给定的工艺参数条件下较好地预测出水水质情况,也可根据进水水质情况和预期出水水质目标对所需的臭氧投加量进行预测。结果表明:基于BP神经网络的臭氧投加模型可以满足不同的水质变化,模拟精度较高,具有明显的优越性,对进一步提高供水安全性、节约制水成本具有重要的推动作用,也为臭氧-活性炭深度处理运行的自动化控制提出了新的理论思路。 相似文献
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The possibility of replacing imported carbon-fiber filters, which are used for the purification of aqueous alcohol solutions
in the manufacture of vodka at a number of domestic distilleries, by the developed adsorber filters was studied. These adsorber
filters combine the filtration of a solution on a macroporous ceramic filter element with adsorption on microporous active
carbon; in this case, the filter bed is responsible for the selective chemisorption of metal ions, whereas the adsorbing bed
is responsible for the total extraction of organic pollutants. A comparative study of the adsorption characteristics of the
competing purification systems was performed, and the advantage of the proposed two-step system for the purification of aqueous
alcohol solutions was demonstrated. 相似文献
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目前混凝沉降、砂滤、氯气消毒等常规水处理工艺已经较难达到饮用水的最新国家标准,水处理新工艺、新技术的开发势在必行。本文在自行设计的2吨/小时的中试水处理装置上,以山东省东营市某水库水为原水,先采用混凝沉降、砂滤两步常规工艺,在随后的深度处理中依次通过精密过滤、臭氧氧化消毒、活性炭纤维吸附净化、紫外杀菌四步处理,考察活性炭纤维等深度净化技术对水质的净化效果。试验发现,该组合工艺净化出水完全符合饮用水最新国家标准。通过本试验,为活性炭纤维在饮用水中的应用提供了必要的基础数据。 相似文献
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该文介绍了国内一自来水公司三个水厂的两个原水水质、净水工艺及出厂水水质。结果显示第一水厂的出厂水质较为理想,第二水厂次之,第三水厂为第三。第三水厂由于水源的问题导致出厂氨氮季节性超标,建议采取有效措施改进水源水质,以提高出厂水质。第二水厂需进行工艺改造,实施臭氧活性炭深度处理以进一步提高供水水质。第三水厂一期系统臭氧生物活性炭池置于砂滤池后较二期活性炭滤池置于砂滤池前出水有机物CODMn及TOC略低,但两者基本相近。建议第三水厂采取必要的措施改进水源水质,或再增加一道臭氧生物活性炭工序。 相似文献
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Heinz Brauer 《化学,工程师,技术》1984,56(4):279-286
Biological purification of exhaust gases. The biological purification of exhaust typically employs microorganisms to transform undesired components, particularly those with pronounced odours into innocuous products. Since the activity of these organisms is localized in water, the odiferous substances must be transferred from the air to water. Oxygen must also be supplied to the water for product transformation. Large scale plant for biological purification of waste air from agricultural and industrial operations were introduced in Europe in the early 1960's. Since then this new technology has undergone remarkable developments. The principal plant types are biofilters, dripping units, and bioscrubbing units. In compost production and agriculture there is a current preference for biofilters and drip units, while biofilters and bioscrubbers are preferred in industry. Such plant already largely satisfy demands on purification performance and reliability. Further development in the direction of even higher performance and more compact plant is expected. 相似文献