郑州市王新庄污水处理厂污泥厌氧消化系统运行影响因素分析

发布时间：2018-07-07 16:16

  本文选题：污泥处理 + 厌氧消化　； 参考：《郑州大学》2015年硕士论文

【摘要】：污泥是城市污水处理厂和污水处理的必然产物。随着我国对环保工作的进一步重视,各大中城市污水处理设施的完善,城市污水处理能力及污水处理率的不断提高,污泥作为污水处理的副产物其产量也随之大幅增长。本文以郑州市王新庄污水处理厂厌氧消化系统为研究对象,从泥温、p H、酸碱比、产气率等方面展开分析,并分析了主要技术经济指标。主要研究结论如下:(1)根据王新庄消化系统2014年1-12月运行监测数据,分析消化系统运行状况。全年消化液p H在6.68-7.43之间,酸碱比在0.085-0.151之间,数值较稳定,产酸与产甲烷过程保持平衡。冬季消化液p H低,酸碱比高,夏季p H升高,酸碱比降低,消化系统酸碱平衡点发生移动,重新建立新的酸碱平衡。王新庄泥温常年在35℃以下,夏季环温较高,泥温比较容易保持,约为33-34℃;冬季环温较低,泥温不易保持,基本控制在30℃左右。虽然全年温差达到4℃左右,但变化过程缓慢,并没有发生突变,故未出现停止产气现象。(2)通过分析王新庄消化系统2014年1-12月进泥有机份及含水率等数据,计算厌氧消化有机分解率及产气率,并与理论值进行比较,发现:王新庄消化系统进泥有机份呈现季节性规律变化,夏季有机份比冬季低。理论上,有机分解率随着进泥有机份的升高而升高,但是由于夏季泥温比冬季泥温高,且停留时间比冬季短,故有机分解率变化趋势未呈现季节性规律变化。王新庄消化系统产气率,包括单位体积污泥产气量和单位质量有机物产气量,实测值与理论值较为接近和吻合,这说明消化系统运行良好。(3)在夏季,消化池投泥量大,进泥有机物含量较低,产气量大,产气率较低,消化不彻底;在冬季,消化池投泥量小,进泥有机物含量高,产气量低,产气率较高,消化较彻底。据此分析,进泥有机物含量越高,有机削减率越高,产气率越高;进泥量越大,产气量越高,单纯提高进泥量可以提高产气量,但是产气率并不一定高。(4)沼气中硫化氢含量逐年升高。
[Abstract]:Sludge is the inevitable product of municipal sewage treatment plant and sewage treatment. With the further attention to environmental protection in China, the improvement of sewage treatment facilities in large and medium cities, the continuous improvement of sewage treatment capacity and sewage treatment rate, the output of sludge as a by-product of sewage treatment has also increased significantly. In this paper, the anaerobic digestive system of Wangxinzhuang sewage treatment Plant in Zhengzhou City was studied. The main technical and economic indexes were analyzed from the aspects of mud temperature, acid / alkali ratio, gas production rate and so on. The main conclusions are as follows: (1) according to Wang Xinzhuang digestive system operation monitoring data from January to December 2014, the operation status of digestive system was analyzed. In the whole year, pH is between 6.68-7.43 and the ratio of acid to base is 0.085-0.151, which is stable, and the process of acid production and methane production is in equilibrium. In winter, pH was low, acid-base ratio was high, pH increased in summer, acid-base ratio decreased, the balance point of digestive system moved, and a new acid-base equilibrium was re-established. The annual mud temperature of Wang Xinzhuang is below 35 鈩，

本文编号：2105514