碳源和硝酸盐对SBBR反硝化除磷影响的试验研究

碳源和硝酸盐对SBBR反硝化除磷影响的试验研究*李亚峰�郝滢�张晓宁(沈阳建筑大学市政与环境工程学院�沈阳110168)��摘�要�研究碳源和硝酸盐对填加聚氨酯载体的SBBR反硝化除磷的影响。在SBR中填加聚氨酯载体,将生物膜法和活性污泥法相结合,形成序批式生物膜反应器(SBBR),在厌氧/缺氧交替运行条件下利用NO3-作为电子受体,研究NaAc浓度、NaAc与丙酸钠的比例、NO3-浓度及NO3-投加方式等因素对除磷效果的影响。PO43-质量浓度在9~11mg/L之间,COD质量浓度为200mg/L时,SBBR有较佳的除磷效果;当进水NaAc与丙酸钠配比为2时,进水COD自身降解速率较慢,且不影响除磷效果;分批次(这里分2次)投加硝酸盐有利于硝酸盐向亚硝酸盐的转化;NO3-质量浓度为65mg/L左右时,能获得较好的除磷、除氮效果。填加聚氨酯载体的SBR装置除磷效果较理想;碳源和硝酸盐对SBBR反硝化除磷影响显著。��关键词�聚氨酯载体�反硝化除磷技术�硝酸盐�序批式生物膜反应器StudyontheEffectsofCarbonSourceandNitrateonDenitrifyingPhosphorousRemovalinSBBRLIYafeng�HAOYing�ZHANGXiaoning(SchoolofMunicipalandEnvironmentalEngineeringinShenyangJianzhuUniversity�Shenyang110168)Abstract�TheexperimentstudiestheeffectsofcarbonsourceandnitrateonphosphorusremovalinSBBRfilledwithpolyurethaneascarriers.PolyurethaneisfilledinSBRascarrierssothatasequencingbiofilmbatchreactor(SBBR)ises-tablished,combiningthebiofilmmethodsandactivedsludgemethods.Theeffectsoftheconcentrationsofsodiumacetate,theratiosofsodiumacetateandsodiumpropinate,theconcentrationsofnitrateandthewayshownitrateisaddedonphos-phorusremovalarestudiedundertheanaerobic/anoxiamodeandusingnitrateaselectroacceptor.Providedthattheconcen-trationofphosphorusisfrom9to11mg/L,theconcentrationofCODis200mg/L,thephosphorusremovaleffectinSBBRispreferable;whentheratioofsodiumacetateandsodiumpropinateis2,theselfdegradationrateofCODisrelativelyslow-ly,andtheeffectofphosphorusremovaldoesnotaffect;whennitrateisaddedinbatches(hereused2batches),itisgoodforthetransformingofnitratetonitrite;whentheconcentrationofnitrateisround65mg/L,theeffectofphosphorusandn-itrogenremovalisdesirable.ThephosphorusremovalinSBRfilledwithpolyurethaneascarriersispreferable;theimpactsofcarbonsourceandnitrateonphosphorremovalduringthedenitrifyingprocessofSBBRareobvious.KeyWords�polyurethane�denitrifyingphosphorusremovaltechnology�nitrate�sequencingbiofilmbatchreactor0�引言反硝化除磷技术是利用厌氧/缺氧交替运行,在系统中驯化出一类以硝酸根为最终电子受体的反硝化聚磷菌优势菌群,通过它们的代谢作用即可同时完成过量吸磷和反硝化过程[1]。近年来,反硝化除磷技术作为一种新型高效低能耗技术已经成为水处理领域的热点[2]。与传统的脱氮除磷技术相比,