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首页> 外文期刊>Journal of Solid Waste Technology and Management >A COMPARISON OF THE QUANTITY AND QUALITY OF LEACHATE GENERATED BY FIVE COMPOST FEEDSTOCKS EXPOSED TO SIMULA TED RAINFALL
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A COMPARISON OF THE QUANTITY AND QUALITY OF LEACHATE GENERATED BY FIVE COMPOST FEEDSTOCKS EXPOSED TO SIMULA TED RAINFALL

机译：模拟降雨过程中五种堆肥饲料产生渗滤液水质和质量的比较

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A study of five compost feedstocks that have been proposed for use in composting animal carcasses was conducted in the fall of 2008. The purpose of the study was to compare the moisture retention and loss characteristics for the feedstocks by themselves when exposed to extreme rainfall events. It also included analyzing the leachate for a number of characteristics. The study is a prelude to a similar study that will collect data on leachate quantity and quality for one or more of the feedstocks when used to compost an animal carcass. An impervious collection platform was constructed to collect leachate generated by separate piles of various feedstocks, where each pile was exposed to 30 minutes of simulated rainfall (approximately 416 L total or the equivalent of a 25 year/24 hour rain event). Five compost feedstocks that may be used for animal carcass composting were tested: wood chips, a sawdust/shavings mix, leaf and yard waste, horse bedding, and immature sludge-derived compost. Three replicates of each feedstock (Trials 1-3) were constructed into small piles measuring 3 m~3 in volume. Each pile received simulated rainfall twice over a seven-day period (on Day 1 and again on Day 7). Piles were covered by moisture impervious materials between simulated rainfall events. Individual leachate samples (100 ml) were collected at regular intervals during the simulated rainfall periods and were analyzed for: micro nutrients; total phosphorus; nitrate-nitrogen; ammonia-nitrogen; total nitrogen; pH; and conductivity. Total leachate volumes varied widely between the various feedstocks tested. Wood chips averaged the most generated leachate (145 L), whereas the sawdust/shavings mix yielded the least leachate (40 L). Municipal sludge compost and horse bedding recorded the highest levels of nitrate-nitrogen in the collected leachate, whereas horse bedding and municipal leaf and yard waste leachate recorded the highest levels of total phosphorus. However, a review of nutrient uptake capacities of vegetation in a grassed filter area, demonstrate that none of the leachate collected during this study would exceed the ability of a vegetated filter area to utilize both nitrate-nitrogen and phosphorus.
机译：2008年秋季，对提议用于动物尸体堆肥的五种堆肥原料进行了研究。该研究的目的是比较暴露于极端降雨事件下原料本身的水分保持和损失特性。它还包括分析渗滤液的许多特性。该研究是一项类似研究的序幕，该研究将收集一种或多种原料用于堆肥动物尸体时渗滤液数量和质量的数据。构建了一个不透水的收集平台，以收集由不同原料的不同堆产生的渗滤液，其中每堆都暴露于30分钟的模拟降雨（总计约416 L，或相当于25年/ 24小时的降雨事件）。测试了五种可用于动物尸体堆肥的堆肥原料：木屑，木屑/刨花混合物，叶子和院子里的废料，马褥和不成熟的污泥衍生的堆肥。将每种原料的三个重复样品（试验1-3）构建成体积为3 m〜3的小堆。每个桩在7天的时间内（第1天和第7天再次）两次接受模拟降雨。在模拟降雨事件之间，桩被不透水的材料覆盖。在模拟降雨期间定期收集单个渗滤液样品（100毫升），并进行以下分析：总磷硝酸盐氮氨氮总氮pH值和导电性。各种测试原料之间的总渗滤液量差异很大。木屑平均产生最多的渗滤液（145升），而木屑/刨花混合物产生的渗滤液最少（40升）。市政污泥堆肥和马场垫层收集的渗滤液中硝酸盐氮含量最高，而马场垫土和市政垃圾场和垃圾场渗滤液中的总磷含量最高。然而，对草地过滤区植被的养分吸收能力的回顾表明，在这项研究中收集的渗滤液不会超过植被过滤区利用硝酸盐氮和磷的能力。

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