Research in Mixing Ratio of the Improvement of Saline-Alkali Soil by Urban Sewage Sludge and the Influence of Odor

摘要

城市污水污泥的土地利用有效地解决了污泥的出路和盐碱土改良的问题.本文以哈尔滨市某城市污水处理厂的脱水污泥作为试验对象,在进行泥质分析的基础上,通过盆栽试验考察并得到了对于植物生长的最佳土壤/污泥配比为1∶1,利用分光光度法对逸散气体的无机成分进行了采集与测定,得到气体中氨气的浓度与硫化氢的浓度在24h内的变化规律.而且利用便携式XP-329Ⅲ系列臭气探测仪对污泥和土壤的混合物的逸散气体进行测定,得出臭气指数,并对其进行分析.同时将所得到的氨气和硫化氢浓度与《居住区大气中有害物质的最高容许浓度》(TJ36-79)和《城镇污水处理厂污染物排放标准》(GB 18918-2002)相对比,发现其起始阶段浓度要大于标准内的最高容许浓度,但是在静置24h或更长时间后,浓度可以达到或者接近标准值.%The land use of urban sewage sludge can solve the problem of sludge outlet and saline-alkali soil improvement effectively.During this study,Harbin municipal sewage treatment plant dewatered sludge was examined.Based on the survey response and nature laws of plants growing and changing,this experiment uses experimental methods to determine the use of the process gas cast of the laws.We found out that when the ratio of soil and sludge reach to 1∶1,plants will have the highest rate of growth.As well,we got to know the role of odor release in the progress of land use.XP-329Ⅲ series detectors were used to examine the soil and sludge in order to get the Oder Index and analysis data.At the same time,compared with The air of residential areas harmful substances maximum allowable concentration(TJ36-79) and The urban sewage treatment plant pollutant emission standards (GB18918-2002),it showed that the initial stage of concentration was higher than the maximum allowable concentration within the standard and the concentration can meet or close to standard values after aside for 24h or longer.