Reciclaje del efluente de origen animal con tres especies de plantas acuáticas

[摘要] Anexperimentwascarriedouttoevaluatetheeffectivenessofusingaseriesofwaterplantstodecontaminatetheeffluentfromabiogasdigesterloadedwithmanurefrompigsandcattlewhichcontained:(g/litre)86,000ChemicalOxygenDemand(COD),19,000oftotalsolublesolids(TSS)and10,000ofvolatilesolublesolids(VSS).Theeffluentwasheldinexperimentaltanks(2x1x0.15m)for81days,duringwhichitservedasthegrowthmediaforWaterHyacinth(Eichorniacrassipes)for27days,forWaterLettuce(Pistiastratiotes)(27days)andfinallyforDuckweed(Lemnasp)for27days.ThevaluesforCOD,TSSandVSSafterthewaterhyacinthtreatmentwere:17,154±2,990,8,821±4,339and5,321±2,893mg/litre;afterthewaterlettucetreatmentthevalueswere:18,765±1,586,8,491±571,5,031±634,andaftertheduckweedtreatmentwere:80.7±22,36.2±4.8and9.5±2.5mg/litre.ConcentrationsofNitrate,PhosphateandPotassiumchloridewerereducedfrom941,98and570(mg/litre)intheoriginaleffluentto4.4±01.5,6.5±2.5and2.0±0.77mg/litreafterthe81daytreatmentbythethreeaquaticplantspecies.Waterhyacinthandduckweedweremuchmoreeffectivethanthewaterlettuceinreducingorganicandinorganicpollutantsinthebiodigestereffluent.Biomass(freshbasis)productionwas:(g/m2/day)33.8±17.5,59.6±30.8and70.7±35.4forwaterhyacinth,waterlettuceandduckweed,respectively.

[学科分类] 农业科学（综合）