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CONDITION OPTIMIZATION FOR DYNAMIC EXPERIMENTS OF THERMAL ALKALINE CRACKING SLUDGE
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摘要: 以城市污水处理厂二沉池污泥为研究对象，利用热碱处理工艺对其进行处理，研究污泥的最佳处理条件，分析静态实验对动态实验的指导作用。结果表明：静态实验处理条件下，污泥热碱处理的最佳初始pH、反应温度、反应时间分别为13、30℃、10 h；在最适条件下，COD溶出率、水相中的蛋白质和多糖浓度依次为61.53%、761.73 mg/L、649.85 mg/L；动态实验最佳反应时间为10 h，在此最佳条件下COD溶出率为75.77%、多糖浓度为842.34 mg/L，蛋白质浓度随着反应时间上下波动，总体破解效果高于静态实验。以上结果表明，污泥静态实验对动态实验具有现实指导作用，热碱联合具有较好的应用前景。Abstract: Taking the secondary sludge of municipal sewage treatment plant as the research object and using thermal alkali treatment process to treat the sludge, this study investigated the optimal treatment condition and analyzed the guiding function of static experiment to dynamic experiment. The results showed that for the static experiment of thermal alkali treating sludge, it had the optimal initial pH of 13, temperature of 30℃, and time of 10 h. Under the optimum conditions, the dissolution rate of COD was 61.53%, and the concentration of protein and polysaccharide in aqueous medium were 761.73, 649.85 mg/L respectively; the optimum reaction time of dynamic experiment was 10 h, and under the optimum conditions, the COD dissolution rate was 75.77%, the concentration of the protein and polysaccharide were 1024.70, 842.34 mg/L, which were higher than the results of static experiment. The results showed that the static experiment of sludge had practical guidance to the dynamic experiment, and thermal-alkaline method had a good application prospect.
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Key words:
- thermal-alkaline method /
- dynamic experiment /
- COD dissolution rate /
- protein /
- polysaccharides
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