基于好氧消化的城市污泥腐殖化机理及资源化
摘要:
目前,我国城市污泥的合理处置与控制才刚刚起步,处理方法还比较落后,较易造成二次污染,因此采用污泥间歇式好氧腐殖化处理是一项比较先进的技术,值得进行推广。城市污泥的资源化利用也十分迫切。本文旨在研究基于好氧消化的城市污泥腐殖化工作机理及其资源化研究。本文采用多种调查方法,对某市连续5年的污泥处理方法进行调查比较,并比较其资源化利用率;某省3家主要城市污泥处理厂好氧腐殖化污泥处理方法的使用频率及目前存在的困难;通过文献分析,总结出城市污泥好氧消化腐殖化法的机理;从4个方面得出某省3家主要城市污泥处理厂好氧腐殖化污泥处理方法的资源化转化情况。结果表明,好氧腐殖酸污泥处理利用率逐年提高,其利用率约为30%,资源转化率约为60%,可使有害物质比例降低至3%左右。主要赋存条件为氧指数高于50%、温度为100~70℃、C/N比为1:3、含水率大于75%,目前的难点主要为发酵成熟度的判定困难。二者兼有。结果充分证明人们越来越认识到好氧腐殖酸在市政污泥处理过程中的重要性。其中,好氧腐殖酸有利于提高资源利用率、减少有害物质的排放。利用比例不高,主要存在技术问题和污物分类问题。
Abstract: At present, the reasonable disposal and control of municipal sludge in China has just started, and the treatment method is still relatively backward, which is more likely to cause secondary pollution. Therefore, the use of sludge batch aerobic humification treatment is a relatively advanced technology worth carrying out Promotion. It is also very urgent to recycle municipal sludge. This article aims to study the working mechanism of municipal sludge humification based on aerobic digestion and its resource research. This article uses a variety of survey methods to investigate and compare the sludge treatment methods of a city for 5 consecutive years and compare their resource utilization rates; the frequency and current use of aerobic humification sludge treatment methods at 3 major municipal sludge treatment plants in a province Existing difficulties; literature analysis summarizes the mechanism of aerobic digestion of municipal sludge humification method; resource conversion of aerobic humification sludge treatment method of three major municipal sludge treatment plants in a province is obtained in four aspects in conclusion. The results show that the use ratio of aerobic humic sludge treatment is increasing year by year, and its use ratio is about 30%, and the resource conversion rate is about 60%, which can reduce the proportion of harmful substances to about 3%. The main occurrence conditions are the oxygen index is higher than 50%, the temperature is 100-70 degrees, the C / N ratio is 1: 3, and the water content is greater than 75%. The current difficulty is mainly the difficulty in determining the degree of fermentation maturity. Both. The results fully prove that people are more and more aware of the importance of aerobic humus in the municipal sludge treatment process. Among them, aerobic humus is conducive to improving resource utilization and reducing emissions of harmful substances. The proportion of use is not high, and there are mainly technical problems and dirt classification problems.
文章引用:王昊天. 基于好氧消化的城市污泥腐殖化机理及资源化[J]. 生命科学进展, 2023, 1(1): 1-6.
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