EPA-99-GA103-03-A23

099

990 千元

2010/12/29

2011/12/28

崔砢

土污基管會

尤衍翔

明志科技大學

土壤及地下水

堆肥、還原脫氯、管柱實驗

compost, reductive dechlorination, column study

陳秋楊;范致豪

崔砢

02-29089899#4652

lotsui@mail.mcut.edu.tw

四氯乙烯為主要常見的為地下水污染物之一，由於其密度高且非水溶相之特性，使其不易利用傳統的物化處理方法，將其從地下水中移除。本計畫嘗試利用廉價的堆肥液來取代商用的生物製劑，以評估堆肥液能否作為適當的界面活性劑與電子提供者，以加速四氯乙烯在地下水層中的溶解與生物降解。本計畫共測試三種不同的堆肥：三個月蔗渣堆肥（Ｂ３）、六個月蔗渣堆肥（Ｂ６），與三個月蔗渣/廚餘混合堆肥（Ｍ３）之介面活性性質，以評估不同堆肥液對四氯乙烯的溶解效率，並利用Ｂ３堆肥進行管柱實驗，評估不同堆肥量對四氯乙烯的移除效率。實驗結果顯示，腐熟度低的堆肥，其介面活性性質較腐熟度高的堆肥為佳，而加入廚餘於蔗渣堆肥中更可提升其介面活性劑之性質。管柱實驗結果則顯示，相較於蔗渣原料，蔗渣堆肥能更有效的將下游的四氯乙烯溶出，且溶出效率隨著堆肥量的增加而提高。在近１８０天的培育時間過程中，堆肥能持續的維持系統中的甲烷產量，而能有效的降解四氯乙烯，同時能維持系統中近於中性的ｐＨ值。綜而言之，由於堆肥具有適度的介面活性性質以及多樣的微生物活性，使得堆肥可作為一種整治土壤地下水四氯乙烯污染的良好資材。

堆肥、還原脫氯、管柱實驗

期末報告（修正版2）.pdf

2MB

2012/2/1 上午 12:00:00

Tetrachloroethene (PCE) is one of most found groundwater pollutants. Because it was denser than water and it would not mix with water easily, PCE was difficult to be removed from groundwater through traditional physical-chemical methods. Therefore, compost liquid was proposed as cheap alternative to commercial biological agents to improve the solubility and biodegradation of PCE. In this study, three compost samples: 3-month bagasse compost sample (B3), 6-month bagasse compost sample (B6), and 3-month bagasse compost/ kitchen waste mixed sample (M3) were examined for their biosurfactant property. In addition, B3 sample was selected to conduct column study to evaluate the effects of compost mass on the PCE remove efficiency. The experimental results showed that less matured sample had better biosurfactant property than more matured sample, and addition of kitchen waste would further enhance biosurfactant property. The results of column study showed that bagasse compost could dissolve more down-stream PCE when compared with bagasse sample, and the efficiency increased with increasing of compost mass. During 180 days of column study, sustainable amount of methane gas was detected in system, suggesting compost could be used as long-term electron donors to degrade PCE. The system remained at neutral pH throughout the experiment. Overall, compost contains moderate biosurfancant property and diverse microbial activity, and thus could serve as suitable media for dechlorinating groundwater PCE.

compost, reductive dechlorination, column study