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引用次数: 10
摘要
对厌氧泻湖性能的实验室研究结果进行了分析,得出了可用于设计的动力学数据。目前使用的模型都不能拟合数据。一种新的解释提出了基于依赖的流出水质的体积有机负荷。这表明,去除以逐渐降低的速率(以kg m−3天−1表示)连续阶段进行。对于来自大型养猪场的稀释猪舍废物,第一阶段的快速沉淀仅需几个小时,COD去除率约为55%。第二阶段,生化去除,以1.7 kg COD m−3 day−1进行,HRT约为3天,然后去除率降至0.2 kg COD m−3 day−1
Kinetics of piggery wastes treatment in anaerobic lagoons
Results of laboratory studies of anaerobic lagoon performance have been analyzed to yield kinetic data applicable for design. None of the models currently used fitted the data. A novel interpretation has been proposed based on the dependence of effluent quality on volumetric organic loading. It is suggested that the removal takes place in consecutive stages at a progressively decreasing rate (expressed in kg m−3 day−1). In the case of dilute piggery wastes from large farms the first stage of rapid sedimentation takes only a few hours and achieves some 55% removal of COD. The second stage, biochemical removal, proceeds at 1·7 kg COD m−3 day−1 for about 3 days HRT and then the removal rate drops down to 0·2kg COD m−3 day−1