污泥超音波水解反應槽性能評估與影響因子分析

Performance Evaluation And Model Analysis of Ultrasonic Reactor for Sludge Hydrolysis

陳桓輝(HUAN-HUEI CHEN)

指導教授 ： 莊順興

朝陽科技大學/理工學院/環境工程與管理系/碩士(2017年)

摘要

本研究主要目的為固定探頭對污泥進行超音波水解，分別進行超音波反應槽體性能評估與影響因子分析。探討污泥經超音波水解時，污泥減量及有機物釋出之情形，期望掌握污泥經超音波水解，反應槽體型式之影響特性。
實驗結果顯示出廢棄活性污泥經經超音波水解，固定探頭13 mm，震盪時間10分鐘後，最適超音波作用體積於250 mL，使用之超音波功率100 W，比能量(Es)約12000 kJ/kg-TS，SS之減量約5~6%，SCOD釋出增加約8~10%。.
同一體積污泥在不同的反應槽體型式(圓柱狀)，不同超音波作用方向影響下，產生不同的變化。不同超音波作用方向之影響(探頭向槽底或向液面作用)，皆以2 inch管徑效果較佳，反應槽直徑/高度(D/H)比約為0.44。而方向不同，又以向液面作用超音波水解較佳，SS之減量約6~6.5 %，SCOD釋出約9~11 %。
污泥於超音波反應槽體作用下，小管徑易發生超音波能量聚集，因D/H過小，污泥於槽體內高度過高，使水解效果不佳。D/H過大，亦無良好超音波水解效果。

關鍵字

超音波水解 ； 污泥減量 ； SCOD釋出 ； 比能量 ； 反應槽形狀

並列摘要

The purpose of this research is to apply the ultrasound on sludge hydrolysis with fixed probes, particularly to assess the performance of the ultrasound reaction vessel and to conduct the factor analysis, respectively. The study is expected to figure out the characteristics of the reaction vessel shape by exploring the reduction of the sludge volume and the release of the organic matter through the effect of ultrasound on sludge hydrolysis.
SS reduction between 5~6%, and an increase in the SCOD release by 8~10% were obtained through the application of ultrasound to the hydrolysis of waste activated sludge (WAS) with a 13mm fixed probe, an oscillation period of 10 minutes, the ultrasound effect on an optimal volume of 250 mL, an ultrasonic power of 100 W, and an Es value of about 12000 kJ/kg-TS.
The results varied based on the shapes of the reaction vessels (a cylindrical shape) and the directions of the probe of ultrasound with identical volumes of sludge. A nominal pipe size of 2 inches yielded the best result in both directions of the effects of ultrasound (probe acting on the bottom and the surface) in which the action on the surface is superior that generated SS reduction between 6~6.5% and a SCOD release between 9~11 %.
With the effects of ultrasound in the reaction vessel, it was easy for a small cylindrical reactor to preserve energy due to the D/H ratio that is too low and the height of the sludge in the vessel that was too high to yielded ideal results. However, if a D/H ratio was too high, effective results from the ultrasound application to hydrolysis were not found, either.

並列關鍵字

Ultrasonic Hydrolysis ； Sludge Reduction ； SCOD release ； Specific Energy ； Reactor Shape

參考文獻

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