簡易淨水系統反沖洗廢水水質特性探討

Characteritization of backwash wastewater from a simple water purification system

黃宏霖(Hung-Lin Huang)

指導教授 ： 陳瑞仁

國立屏東科技大學/工學院/環境工程與科學系所/碩士(2010年)

https://doi.org/10.6346/NPUST.2010.00068

摘要

目前以地面水為水源之大型淨水廠其反洗廢水之回收再利用已受大家重視與研究，然探討以地下水或水質較佳之地面水為水源之簡易淨水系統其反洗廢水之研究不多。本研究以台灣自來水公司一處位於南部之簡易型淨水場為對象，探討其快濾池反沖洗廢水水質及反洗廢水懸浮固體物沉降特性，以供未來評估簡易型淨水場反沖洗廢水處理後回收再利用可行性之參考。研究結果顯示：以地下水為水源之簡易淨水系統，其快濾池反沖洗廢水含之濁度其粒徑大部分在膠體粒徑範圍﹙主要以0.34 μm為主﹚、沉降性差；將其加入30 mg/L硫酸鋁混凝後，反沖洗廢水中之濁度、Fe及Mn之去除率分別可達80、72及75 %以上；硫酸鋁可有效地去除簡易淨水系統反沖洗廢水中之濁度、Fe及Mn。

關鍵字

反沖洗廢水 ； 簡易淨水系統 ； 濁度 ； 懸浮固體

並列摘要

The recycle and reuse of backwash wastewater from large water treatment plants which use surface water as raw water have been increasingly concerned and studied. However, little attention has been paid to backwash wastewater from simple water purification systems using ground water or better-quality surface water as raw water. In this study, a simple water purification system of Taiwan Water Corporation located at southern Taiwan was tested. The characteristics of backwash wastewater quality and suspended solid sediment of rapid filter were investigated to assess the feasibility of recycle and reuse of backwash wastewater of simple water purification systems. The results showed that for simple water purification system using ground water as raw water, the turbidity of the backwash wastewater of rapid filter was mainly resulted from the colloid size range (chiefly at 0.34 μm) with poor settling. After coagulation by adding 30 mg/L aluminum sulfate into backwash wastewater, the reduction of turbidity was 80 %, while the removal of Fe and Mn reached 72 % and 75 %, respectively, indicating that aluminum sulfate could effectively remove the turbidity, Fe, and Mn in backwash wastewater from simple water purification systems.

並列關鍵字

backwash wastewater ； simple water purification system ； turbidity ； suspended solid

參考文獻

行政院環境保護署，2005，「水質監測領隊教師研習教材」，第三屆世界水質監測日活動。

行政院環境保護署新聞，2006，「廢污水回收再利用新政策」，環保技術e報，第037期。

Arora, H., Di Giovanni, G., and Lechevallier, M., 2001. “Spent filter Backwash water contaminants and treatment strategies”, Journal of American Water Works Association, Vol. 93, No.5, pp. 100-111.

Bruegger, A., 2000, “Reuse of filter backwash water using ultrafiltration technology”, Filtration and Separation, Vol. 37, No. 1, pp. 22-26.

Cornwell, D. A., and Lee, R., 1994, “Recycle stream recycling: its effects on water quality,” Journal of American Water Works Association, Vol. 86, No. 11, pp. 50-63.