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WATER QUALITY OF DRAINAGE FROM INDUSTRIAL WASTE LANDFILLS AND ITS EFFECTS ON AGRICULTURE

工业垃圾填埋场排水水质及其对农业的影响

基本信息

批准号：
07660316
负责人：
MISAWA Shin-ichi
金额：
$ 1.34万
依托单位：
NIIGATA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07660316/
关键词：
INDUSTRIAL WASTE WASTE LANDFILL WATER POLLUTION AGRICULTURE TOTAL NITROGEN 水質

项目摘要

Water quality of drainage from 8 stable type and 2 control type of industrial waste landfills were monitored. Through investigation, the followings were found : In spite of after treatment, the concentrations of water quality (EC,COD,T-N) of drainage water from control type of industrial waste landfills were very high compared to those of stable type landfills.The water quality of the leachate from the stable type landfills was in the range of 5-50mg/l for COD and 2.5-10mg/l except for the Teradomari landfill. When investigation was started in 1992, the COD and T-N concentration of the leachate from Teradomari landfill exceeded 70mg/l and 75mg/l respectively. These values were very high compared to irrigation water quality standard (COD : 6mg/l, T-N : 1mg/l), so paddy rice irrigated contaminated water received serious damage.From the data of yearly drainage water concentration changes for 2 landfills Teradomari and Narisawa, it was found that water quality concentration changes could be presented by logarithmic regression formula. It become possible to predict the period of water quality recovery. For the most polluting Teradomari landfill, it was predicted that it would take 15.4 years for T-N,8.5 years for COD,and 11.9 years for EC to reach irrigation water quality standard from the time the landfill got filled up and was covered with soil.Water quality concentration of drainage from landfills filled up had regression trend, but water quality also changed with the affection of rains. A tank model had constructed for prediction of flow and water quality of leachate from stable landfills. Using this tank model the leachate with the slow response for rains and water quality with quick response for rains.

对8个稳定型和2个控制型工业垃圾填埋场的排水水质进行了监测。通过调查发现：尽管经过处理，控制型工业垃圾填埋场的出水水质(EC、COD、T-N)浓度均高于稳定型垃圾填埋场；除Teradomari垃圾填埋场外，稳定型垃圾填埋场的渗滤液COD值在5~50 mg/L，渗滤液的水质在2.5~10 mg/L。1992年开始调查时，Teradomari垃圾填埋场渗滤液的COD和T-N浓度分别超过70 mg/L和75 mg/L。与灌溉水质标准(COD值：6 mg/L，T-N：1 mg/L)相比，这些值都很高，水稻灌溉污染水受到了严重的破坏。根据Teradomari和Narisawa两个垃圾填埋场的年排水浓度变化数据，发现水质浓度的变化可以用对数回归公式来描述。预测水质恢复的时间成为可能。对于污染最严重的Teradomari垃圾填埋场，从填埋并覆盖土壤到达到灌溉水质标准需要15.4年的T-N、8.5年的COD和11.9年的EC，填埋场的排水水质浓度有回归趋势，但水质也随着降雨的影响而发生变化。建立了用于预测稳定填埋场渗滤液流量和水质的水箱模型。采用该水箱模型，渗滤液对雨的响应慢，水质对雨的响应快。