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首页> 外文学位 >Environmental issues in organics recycling: Reed bed biosolids reuse and leachate from wood mulch stockpiles.
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Environmental issues in organics recycling: Reed bed biosolids reuse and leachate from wood mulch stockpiles.

机译：有机物回收中的环境问题：芦苇床生物固体的再利用和来自木料库存的渗滤液。

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摘要

Despite numerous economical and environmental benefits associated with recycling, improper recycling practices can have an adverse impact. In the first part of this dissertation, reuse of reed bed biosolids containing Phragmites australis (common reed), considered an invasive species, was explored. It was hypothesized that the high temperatures achieved during composting could destroy the plant rhizomes as well as pathogenic microorganisms, making the biosolids eligible for USEPA Class A status for unrestricted land application. However, prior anaerobic digestion followed by stabilization of reed bed material occurring over 10 years deprived the material of enough available carbon for composting to occur spontaneously. Several inexpensive and easily available organic materials were tested in the laboratory for their ability to stimulate composting of the reed bed biosolids. Phragmites above ground biomass, available abundantly on site, was determined to be a suitable amendment. When tested at 1:2 ratio (dry weight basis) Phragmites above ground biomass to biosolids in the field, although they were effective in killing the rhizomes, high composting temperatures did not last long enough for the product to achieve Class A status.;To account for these limitations a controlled study determining leachate concentrations and volumes from definite sized wood mulch stockpiles was carried out over a 2 year period. Correlations were found for loads but not concentrations for several parameters with rain volume and intensity, but not usually with age of the piles. Using these relationships simple equations predicting pollutant and nutrient loads were developed. Dose-response studies done on the leachate samples using zebrafish embryos showed little toxicity. Polynuclear aromatic hydrocarbons and pentachlorophenol concentrations were below detection limits, and Cu, Cr, As, Pb, and Zn concentrations were likewise low.;In the second part of this work, water quality issues associated with the wood recycling industry in New Jersey were studied. Leachate and runoff samples from 3 different wood recycling facilities were tested for wastewater parameters over a 15 month period. The concentration ranges were highly variable, but often similar to raw sewage values. However, since this was an uncontrolled study in terms of drainage area, precipitation, and wood mulch volume, no definite conclusions could be drawn.
机译：尽管回收带来了许多经济和环境效益，但是不正确的回收做法可能会产生不利影响。在本文的第一部分中，探索了含有芦苇（普通芦苇）的芦苇床生物固体（被认为是入侵物种）的再利用。据推测，堆肥过程中达到的高温可能破坏植物的根茎以及病原微生物，从而使该生物固体符合美国环保局A级标准，可以不受限制地用于土地。但是，先进行的厌氧消化再经过10年的芦苇床材料稳定化处理，使该材料失去了足够的可用碳以用于自发堆肥。在实验室中测试了几种廉价且容易获得的有机材料刺激芦苇床生物固体堆肥的能力。地面上可大量使用的芦苇被认为是合适的改良剂。当以1：2的比例（以干重计）测试时，田间地面上的生物量芦荟和生物固形物虽然可以有效杀死根茎，但高堆肥温度的持续时间不足以使产品达到A级状态。考虑到这些局限性，我们进行了为期2年的对照研究，确定了一定尺寸的木料库存中的渗滤液浓度和体积。发现与载荷的相关性，但与降雨量和强度的几个参数的浓度无关，但通常与桩龄无关。利用这些关系，开发了预测污染物和营养物负荷的简单方程式。使用斑马鱼胚胎对渗滤液样品进行的剂量反应研究显示毒性很小。多核芳香烃和五氯苯酚的浓度低于检测极限，并且铜，铬，砷，铅和锌的浓度也很低。；在第二部分，研究了新泽西州木材回收行业的水质问题。在15个月的时间内测试了来自3个不同木材回收设施的渗滤液和径流样品的废水参数。浓度范围变化很​​大，但通常与原始污水值相似。但是，由于这是关于流域面积，降水量和木料覆盖量的不受控制的研究，因此无法得出确切的结论。

著录项

  • 作者

    Kannepalli, Sarat.;

  • 作者单位

    Rutgers The State University of New Jersey - New Brunswick.;

  • 授予单位 Rutgers The State University of New Jersey - New Brunswick.;
  • 学科 Environmental Sciences.;Engineering Environmental.;Water Resource Management.
  • 学位 Ph.D.
  • 年度 2014
  • 页码 184 p.
  • 总页数 184
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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