株洲市生活污水污染特征研究

在一年中，分4个季度(每季度3天，每天4次)对株洲市区具有代表性的4个不同地点的生活污水水质进行了监测.结果表明生活污水中的主要污染物是BOD5和Inorg-P；污染物浓度有明显的时空变化规律，中午和傍晚前后的浓度较高，早晨和半夜则较低，冬、春季节的污水污染物浓度皆高于夏、秋两季，居民、餐饮业密集区的污水中污染物浓度显著高于商业区和混合区；污水中氮、磷主要以无机盐形式存在；目前株洲市生活污水排放量与主要工业污染源废水年排放量相当，CODcr、BOD

Study of the Pollution Features of Domestic Sewage in Zhuzhou City

The water quality of domestic sewage in Zhuzhou City was monitored at 4 different positions for one year (4 seasons per year, 3 days per season and 4 times per day).The monitoring results show that BOD 5 and Inorg P were two main pollutants in domestic sewage and that with the alteration of sampling time and sampling site, concentrations of pollutants in domestic sewage changed in a certain pattern.Firstly, the pollution level in noon and dusk was higher than that in morning and midnight;Secondly,in winter and spring, the domestic sewage contained more pollutants than the other two seasons;Thirdly,the domestic sewage from the site containing thick population and restaurants was polluted more seriously than that from the business quarter and mixed parts.Over 60% of total nitrogen and phosphorus in domestic sewage existed in the form of inorganic salts;At present, there is no evident difference in annual production between domestic sewage and industrial wastewater from the primary pollution sources and meanwhile,the total quantity of BOD 5 and CODcr in domestic sewage has been larger than that in industrial wastewater.So,the pollution pressure from domestic sewage on Xiangjiang River should not be ignored.Higher biodegradability (BOD 5/CODcr)and suitable CODcr/T P value in domestic sewage of Zhuzhou City indicated that biological purification would eliminate this kind of pollution effectively.