排序方式: 共有9条查询结果,搜索用时 15 毫秒
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采用沉淀-SBR-活性炭过滤复合工艺对城市垃圾渗滤液进行处理,确定混凝、SBR和活性炭过滤的最佳参数。结果表明,当进水CODcr 2500mg/L、氨氮在900mg/L的条件下,经该系统处理后,出水CODcr均在300mg/L以下,氨氮在20mg/L以下。CODcr去除率达90%以上,氨氮去除率达98%以上,达到去除有机物和氨氮的较好效果。 相似文献
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混凝沉淀-SBR-活性炭过滤处理垃圾渗滤液 总被引:1,自引:0,他引:1
采用沉淀-SBR-活性炭过滤复合工艺对城市垃圾渗滤液进行处理,确定混凝、SBR和活性炭过滤的最隹参数.结果表明,当进水COD为2500mg/L、氨氮在900mg/L的条件下,经该系统处理后,出水COD均在300mg/L以下,氨氮在20mg/L以下,COD去除率达90%以上,氨氮去除率达98%以上,达到较好的去除有机物和去氨效果. 相似文献
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铁屑过滤+H2O2预处理难降解染料废水的研究 总被引:11,自引:0,他引:11
介绍了铁屑过滤+H2O2预处理难降解染料废水实验研究结果.采用铁屑过滤微电解法预处理难降解染料废水,当进水pH为4,停留时间为8 min时,出水BOD5/COD较原水提高0.2-0.3;若在铁屑过滤进水中加入H2O2(30%)8‰投加量,可使废水可生化性得到显著改善,有利于后续采用生化法处理. 相似文献
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摘要:生物滤池技术是一种高生物量、高低负荷并存,采用气水反冲洗,应用规整波纹板、陶料等填料产生生物净化和过滤作用方法,可根据污水类型、进水水质指标组合不同的工艺进行处理。生物滤池技术处理生活污水,具有生物净化和过滤双重功效,对有机物和氮、磷具有较高的去除率,经工程实例监测结果表明,该技术处理效果好,运行稳定,各项指标均能达标,可以作为中水回用,缓解了水资源紧缺,减少了污水排放量,具有明显的社会效益、经济效益、环境效益,有一定的推广价值。 相似文献
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Emma-Christin Lönnroth Houshang Shahnavaz 《International journal of occupational safety and ergonomics》2013,19(3-4):151-160
In a cross sectional study done in 1993 among dental personnel in Norrbotten, self-reported prevalence of muscular pain, headache, tremor, insomnia, irritation, impaired memory and depression, as well as information regarding different mercury exposures were collected Mercury exposures were determined as “number of amalgam fillings in teeth,” “years in practice,” “insufficient ventilation at work,” “total number of amalgam removed, produced and polished per day,” and “working in dental clinics.” As controls, physicians and nurses from the same geographical area were selected. The correlation between symptoms and different mercury exposures was calculated using logistic regression. The results suggested a higher prevalence of muscular fatigue and tremor for female dental personnel compared to controls Controls reported a lower prevalence of symptoms with increasing number of amalgam fillings in teeth. There was no correlation between the number of amalgam fillings handled per day and symptoms for dental personnel. Male dental personnel associated muscular fatigue headache, impaired memory, and depression with increased handling of amalgam in the clinic’ whereas the female dental personnel associated the same symptoms with the number of amalgam fillings in teeth. The strongest correlation was found between symptoms and insufficient ventilation at dental clinics for dental personnel. 相似文献
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