垃圾掩埋場滲漏水有機質之傳輸及污染地下水質評估研究

Assessment on the Transport and Groundwater Contamination Organic Leachate in a Garbage Dumping Area

余伍洲(Wuchou yu) ； 林正錺(Chenfang Lin) ； 張家銘(Chia M. Chang)

《土壤與環境》 6卷4期 (2003/12) Pp. 183-192

https://doi.org/10.30058/SE.200312.0002

摘要

衛生掩埋法是垃圾處理最常用的方法，其滲出水如末收集處理，所含的有機質極易造成地下水質污染。本文之目的嘗試以質量平衡的原理，利用系統分析的方法，來建立數學模式，並應用所建立之模式來做為預測污染地下水質之評估。本試驗所使用之土壤採自大肚山台中市垃圾掩埋場底土，滲漏水取自掩埋場廢水集水槽。為求取參數進行數學模式之探討，於實驗室中首先探討滲漏水飽和土壤之有機質分解作用的現象，並求得該滲漏水飽和土壤在恆溫狀態下不易被生物分解之總有機質殘留量，及可分解有機質分解速率常數。其次探討滲漏水流經土壤之過濾作用，利用不同夷度之土柱及不同流量之滲漏水快速將滲漏水流過土柱，試驗結果顯示該滲漏水在三種不同土層深度及流量之過濾作用下，其末被截留之有機質流出比率值皆接近0.82。

關鍵字

垃圾 ； 傳輸 ； 地下水

並列摘要

Landfilled dumping method is the most
common way for garbage disposal; however, if
the watery leakage, riched of organic
substances, is not collected and processed, it
will migrate into soil and eventually pollute the
underground water. Based on the principles of
mass conservation and system analysis, tried to
builds up a mathematical model for assessing
the transport of the organic leachate and its
potential contamination to the groundwater.
The sampling area was targeted at the garbage
dumping site in the Ta-du mountain located in
the suburban of Taichung city. All the soil in
the experiment was taken from the layer upon
which the garbage is to be dumped. The watery
leakage was taken from the collecting pool of
the dumping area. In order to idenitify the
parameters for the mathematical model, some
studies on the decompositions of organic
substances in the leachat-saturated soil were
carried out. The non-decomposable organic
fraction and the rate constant of the decomposable
fraction under constant temperature were
measured. In the decomposability studies, the
effects of the soil on the organic decomposition
and retention were investigated. Different
lengths of soil columns were used and different
flow rates of leachate were enforced and
accelerated to flow through the colums. The
results showed that the organic substances
passed through the soil colums of three
different lengths and flow rates were
approximately at the constant fractions of 0.82.

並列關鍵字

Municipal solid waste, Underground