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《富磷剩余污泥厌氧消化过程中氮磷释放形态研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、第35卷第9期l不诧尉敢V0L3SNo.92012年9月EnvironmentalScience&TechnologySept.2012毕东苏,郭小品.富磷剩余污泥厌氧消化过程中氮磷释放形态研究阴.环境科学与技术,2012,35(9):139—142.BiDong—SU,GuoXiao—pin.Effectoftemperatureandphonreleaseofnitrogenandphosphorusduringanaerobicdigestionofphosphorus—richwasteactivatedsludge[J].Environm
2、entalScience&Technology,2012,35(9):139—142.’富磷剩余污泥厌氧消化过程中氮磷释放形态研究毕东苏,郭小品(1.上海应用技术学院化学与环境T程学院,上海200235;2.上海环境科学研究院,上海200083)摘要:通过静态厌氧消化试验,研究剩余污泥消化过程中pH与温度对氮磷释放形态的影响。结果表明,当pH=10.0时,消化过程中氮磷的释放程度均高于pH=5.0,在同等的pH情况下温度是氮磷释放的有利影响因素。温度对消化液中氮磷的存在形态影响较小,而pH则是影响氮磷形态的关键因素。pH=5.0时,NH一N是消化液
3、中最主要的氮存在形态。当pH=10.0时,由于NH3的挥发作用,相当一部分氮从消化系统中损失,造成其NH4+-N低于pH=5.0。尽管在pH=10.0时比pH=5.0时有更多的磷释放,但pH=5.0时,消化系统中PO~-P的浓度却高于pH=10.0,其主要原因在于碱性条件下释放出的磷主要以聚合磷或其它结合磷为主。关键词:厌氧消化;富磷剩余污泥;氮磷;pH;温度中图分类号:X703.1文献标志码:Adoi:10.39690.issn.1003—6504.2012.09.029文章编号:1003—6504(2012)09—0139—04Effectof
4、TemperatureandpHonReleaseofNitrogenandPhosphorusduringAnaerobicDigestionofPhosphOrus—richWasteActivatedSludgeBIDong—SU。GUOXiao—pin(1.SchoolofChemicalandEnvironmentalEngineering,ShanghaiInstituteofTechnology,Shanghai200235,China;2.ShanghaiEnvironmentalScienceAcademy.Shanghai200
5、083.China)Abstract:Releaseofphosphorusandnitrogenduringanaerobicdigestionofphosphorus-richwasteactivatedsludgewereevaluatedwithrespectoftheeffectoftemperatureandpHvaluebyoperating4lab-scaleanaerobicdigesters.Justasthereleaseofsolublechemicaloxygendemand(SCOD)andsolubilizationo
6、fvolatilesuspendsolids(VSS),theformsofnitrogenandphosphorusreleasedwereshowntobesubstantiallydependentonpHvalueratherthantemperature.NH4LNwasthemostprevalentformsreleasedatpH5.0conditions.Duetovolatilization,thelossofnitrogenwasthemostprevalentformsatpH10.0.VolatilizationofNH4
7、NatpH10.0cananswerforwhyNI-hLNatpH5.0ishigherthanthatatalkalinepHwel1.Althoughmorepi~osphorusreleasedatpH10.0,theconcentrationofP043—一PatacidicpHwashigherthanthatalkalinepHbecausemostofthephosphorusreleasedinsupematantatacidicpHexistedintheformsofo}.Keywords:anaerobicdigestion
8、;phosphorus-richwasteactivesludge(PRWAS);nitrogenandphosphoru
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