| Summary: | 碩士 === 崑山科技大學 === 環境工程研究所 === 99 === Activated sludge process is currently the world most popular treatment of sewage sludge, which produces the sludge, usually contains a considerable amount of organic matter, without the proper treatment, will result in direct or potential environmental Pollution. In order to effectively disposal the sludge of the ultimate goals (stabilization, Abatement, harmlessness and resources), while increasing the sludge of the resource value, to physical, chemical, biological, three types of treatment means to conduct a study , explore the impact of disposasludge .
Microwave / Activated carbon / NaOH way to quickly treatment with the experiment, adding activated carbon could improve the treatment temperature in a short time, and then solve the time-consuming and energy consumption of using conventional heat treatment. The results shown in the microwave power 800 W, exposure time of 150 s, addition of sodium hydroxide 0.25 g / g MLSS and activated carbon dosage 0.2 g / g MLSS is the best conditions, can effectively destroy microbial cells and break down sludge, the MLVSS decreased, SCOD increase the amount. In the final sludge reduction rate reached 70.3 %, compared this method with the conventional heat treatment, a short time the sludge reduction rate can be increased about 3 times.
The ultrasound / ozonation treatment method for quick treatment can be converted to sludge flocs of small molecules from macromolecules converted into H2O and CO2, to further improve efficiency. The results shown in the ultrasound power of 80 %, contact time 60 min, the ozone dose of 0.5 g / g MLSS and the processing temperature of 80 ℃ for the best conditions, can effectively destroy the floc and its decomposition, so that lower MLVSS To improve the amount of SCOD, the last sludge reduction rate reached 75.22 %.
In this study, the way physically with the chemical treatment of waste sludge, ultrasound / ozonation and microwave / Activated carbon / NaOH, compared with the traditional method, can effectively shorten the processing time and improve the reduction rate, to achieve the purpose of energy saving and carbon emission reduction.
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