A Study of the Potential Contribution of Sedimentation to Aerobic Treatment Processes for Pig Slurry

摘要: Abstract The technique of aeration can only partly treat pig slurry because its limited effect on much the undissolved matter present. Further reduction in environmental impact effluent, thus requires some form physical clarification. Centrifugation tests showed extent to which separation could concentrate a range insoluble components into sludge, leaving clarified supernatant effluent. These included suspended solids (TSS), Chemical Oxygen Demand (COD), copper, zinc, and manganese; Total Solids concentration (TS) was less owing partial solubility. Batchwise gravitational sedimentation revealed that aerobic treatment enhanced settling characteristics slurries. However, total whole more significant factor: most effective dilute slurries ( 2 TS) but then pronounced. Very concentrated (>40 kg m 3 did not separate effectively. An overall mass balance indicated be used for up 25 kg/m TS if excessive sludge fractions (>50%) were avoided. Continuous satisfactorily demonstrated at pilot scale performance compared well with batch sedimentation. A novel factor defined aid evaluation performance. This combined traditional efficiency correction allow volumes produced.