废铁屑、还原铁粉对剩余污泥厌氧消化效果的研究

废铁屑尧还原铁粉对剩余污泥厌氧消化效果的研究艾乐仙1袁邓风1袁胡潇鹏1袁张效华2渊1.南京工业大学环境学院袁江苏南京210000曰2.南京工业大学城建学院袁江苏南京210000冤咱摘要暂通过实验探究了废铁屑和还原铁粉对污泥厌氧消化上清液中挥发性脂肪酸渊VFAs冤尧溶解性化学需氧量渊SCOD冤尧氨氮渊NH4+-N冤以及总磷渊TP冤的影响遥研究表明院与还原铁粉相比袁废铁屑更能促进污泥厌氧消化水解产酸的效果袁并增加污泥的SCOD袁第5天SCOD达到最大袁较投加还原铁粉提高了33.51%曰投加废铁屑和还原铁粉均能促进污泥厌氧消化水解过程中NH4+-N含量的升高袁但废铁屑的效果优于还原铁粉曰废铁屑和还原铁粉均可抑制污泥厌氧消化过程中TP的释放袁还原铁粉的效果优于废铁屑袁对磷的去除率达到93.6%遥咱关键词暂污泥曰厌氧消化曰废铁屑曰还原铁粉咱中图分类号暂X703咱文献标识码暂A咱文章编号暂1005-829X渊2019冤08-0069-04StudyonanaerobicdigestioneffectofwasteironscrapandreducedironpowderonresidualsludgeAiLexian1袁DengFeng1袁HuXiaopeng1袁ZhangXiaohua2渊1.CollegeofEnvironment袁NanjingUniversityofTechnology袁Nanjing210000袁China曰2.CollegeofUrbanConstruction袁NanjingUniversityofTechnology袁Nanjing210000袁China冤Abstract院Theeffectsofwasteironscrapandreducedironpowderonvolatilefattyacid渊VFAs冤袁solubleCOD渊SCOD冤袁ammonianitrogen渊NH4+-N冤andtotalphosphorus渊TP冤inthesludgeanaerobicdigestionsupernatantarestudiedthroughexperiments.Theresearchshowsthatcomparedwiththereducedironpowder袁thewasteironscrapcanpromotetheeffectofhydrolysisacidproductioninsludgeanaerobicdigestion袁andincreasetheSCODoftheslu鄄dge.Onthefifthday袁theSCODreachesthemaximum袁whichis33.51%higherthanthatofaddingreducedironpow鄄der.BoththeaddingofwasteironscrapandthereducedironpowdercanpromotetheincreaseofNH4+-Ncontentinthehydrolysisprocessofsludgeanaerobicdigestion袁buttheeffectofwasteironscrapisbetterthanthatofreducedironpowder.BoththewasteironscrapandthereducedironpowdercaninhibitthereleaseofTPduringtheprocessofthesludgeanaerobicdigestion袁theeffectofreducedironpowderisbetterthanthatofwasteironscrap袁andtheremo鄄valrateofphosphorusreaches93.6%.Keywords院sludge曰anaerobicdigestion曰wasteironscrap曰reducedironpowder咱基金项目暂江苏省住建厅资助项目渊2014Z0100冤有效利用剩余污泥中的有机质尧氮磷等营养元素袁实现污泥资源化已成为研究热点也1页遥污泥厌氧消化技术可以很好地处置污泥袁实现污泥的减量化尧无害化和资源化遥污泥厌氧消化过程主要包括水解尧酸化和产甲烷3个阶段也2页遥水解通常是厌氧污泥消化的限速过程袁使得VFAs尧氢气和甲烷等的产量很低遥为提高污泥厌氧消化产酸和产甲烷的效率袁研究者提出预处理的方法袁如热水解也3页尧化学法也4页尧和机械破碎法也5页等遥但大多数方法都需要高能量或化学输入袁使得该过程成本高昂遥因此袁需寻找增强污泥厌氧消化性能的替代技术遥向厌氧消化系统中投加废铁屑或还原铁粉可以提高污泥水解产酸的效率并在后期强化甲烷生产袁有望成为提高能源转化率的突破口之一遥废铁