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城市污水处理厂恶臭污染源调查与研究

Keywords: 恶臭,硫化氢,

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Abstract:

以H2S和NH3为主要监测指标,对广州一大型生活污水处理厂主要恶臭源H2S、NH3的排放浓度进行了8个月的连续监测。结果表明,该污水厂恶臭成分H2S的排放浓度为0.01~22mg/m3,NH3排放浓度为0~0.67mg/m3。同时,污水厂各处理单元由于其功能和运行条件不同,所产生的恶臭气体成分也不完全一样,在污水进水区段恶臭污染物以H2S为主,其中格栅井H2S浓度最高。其中沉砂池、格栅和污泥浓缩池的H2S、NH3排放浓度呈夏秋季节高、冬春季节低的特征,与季节变化的气温有明显的相关性。对恶臭排放影响因素的研究表明,污水水温越低则H2S和NH2的排放浓度越低,此外,降雨可以显著降低污水处理厂恶臭污染物的排放浓度。

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