Solids, organic load and nutrient concentration reductions in swine waste slurry using a polyacrylamide (PAM)-aided solids flocculation treatment.
Solids, organic load and nutrient concentration reductions in swine waste slurry using a polyacrylamide (PAM)-aided solids flocculation treatment.
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DOI：
10.1016/s0960-8524(03)00116-0
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发表时间：
2003-11
影响因子：
11.4
通讯作者：
P. Walker;T. Kelley
中科院分区：
文献类型：
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作者：
P. Walker;T. Kelley
养猪生产的增加导致产生的废物集中在有限的地理区域内，这可能导致土地利用率超过当地或区域的同化能力。这可能导致污染物通过地表水或土壤-地下水系统转移、环境退化和/或气味问题。现有的猪废物坑储存和泻湖处理技术可能不足以在土地应用之前储存或处理废物，而不会产生这些问题。有效的猪废物固体分离可以减少环境健康问题，并产生增值的生物资源（固体）。本研究评估了聚丙烯酰胺（PAM）絮凝剂辅助固体分离处理的效率，以减少原（未经处理的）猪废物泥浆中的污染指示剂浓度。在添加专有聚合物（PAM）絮凝剂之前和之后，评价了通过重力沉降（沉降）的猪废物浆固体分离效率。结果表明，在大多数进行的分析中，浓度为62.5-750毫克/升的聚合物改良剂提高了泥浆固体分离效率，并显著降低了其他相关水生污染指标的浓度（共进行了50次分析中的33次）。结果还表明，PAM辅助的固体分离从猪废物泥浆可能有助于进一步处理和/或处置，因此减少相关的环境降解潜力。
Increased swine production results in concentration of wastes generated within a limited geographical area, which may lead to land application rates exceeding the local or regional assimilatory capacity. This may result in pollutant transfer through surface water or soil-groundwater systems, environmental degradation, and/or odor concerns. Existing swine waste pit storage and lagoon treatment technologies may be inadequate to store or treat waste prior to land application without these concerns resulting. Efficient swine waste solids separation may reduce environmental health concerns and generate a value-added bioresource (solids). This study evaluated the efficiency of a polyacrylamide (PAM) flocculant-aided solids separation treatment to reduce pollution indicator concentrations in raw (untreated) swine waste slurry. Swine waste slurry solids separation efficiency through gravity settling (sedimentation) was evaluated before and after the addition of a proprietary polymeric (PAM) flocculant. Results indicated that polymer amendments at concentrations of 62.5–750 mg/l improved slurry solids separation efficiency and significantly reduced concentrations of other associated aquatic pollution indicators in a majority of analyses conducted (33 of 50 total analyses conducted). Results also suggested that PAM-aided solids separation from swine waste slurry might facilitate further treatment and/or disposal and therefore reduce associated environmental degradation potential.