A technological and economical comparison between the biological filter bed and the traditional aerated biological oxidation process was carried out.The result showed that biological filter bed is quite effective in treating livestock wastewater.Because the average effluent COD is 120mg/L,which is obviously better than the 400mg/L one required indischarge standard of pollutants for livestock and poultry breeding.Furthermore,the biological filter bed is automated,and can save 45%of the cost for construction,...
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