不同生境对棕鞭藻自絮凝的影响

第38卷暋第1期暋暋暋暋暋暋暋暋暋暋暋暋暋暋暋陕西科技大学学报暋暋暋暋暋暋暋暋暋暋暋Vol.38No.1暋2020年2月暋暋暋暋暋暋暋暋暋暋暋JournalofShaanxiUniversityofScience&Technology暋暋暋暋暋暋暋Feb.2020*暋文章编号:2096灢398X(2020)01灢0038灢06不同生境对棕鞭藻自絮凝的影响张暋波,刘少卓,张安龙,崔梦瑶,亓雪菲(陕西科技大学环境科学与工程学院,陕西西安暋710021)摘暋要:微藻细胞高昂的采收成本是微藻生物能源产业化应用的瓶颈所在.针对此问题,本文通过对BG11(BG灢11MediumforBlueGreenAlgae)、gluBG11(添加10g/L葡萄糖的BG11)、生活废水三种营养环境中棕鞭藻自絮凝的差异对比,研究了不同营养环境对棕鞭藻自絮凝的影响.结果表明:在较大pH范围(1~8)内,棕鞭藻在生活废水中絮凝效率最高,当pH为2时其絮凝效率可达86.01%,棕鞭藻更适合在低pH条件下的生活废水中絮凝;由于生活废水中Mg2+含量较低,导致棕鞭藻在高pH(11~12)条件下自絮凝效率仅为30%左右,远低于其在BG11中的自絮凝效率(72.39%);葡萄糖的添加可促进棕鞭藻产生大量的AOM(Al灢galOrganicMatter),从而抑制了棕鞭藻的自絮凝过程.本研究为在复杂废水环境中建立高效的微藻采收体系提供了重要指导.关键词:棕鞭藻;生活废水;自絮凝;AOM中图分类号:X703暋暋暋暋文献标志码:AEffectsofdifferentecologicalhabitationontheauto灢flocculationofOchromonassp.ZHANGBo,LIUShao灢zhuo,ZHANGAn灢long,CUIMeng灢yao,QIXue灢fei(SchoolofEnvironmentalScienceandEngineering,ShaanxiUniversityofScience&Technology,Xi曚an710021,China)Abstract:Thehighharvestingcostofmicroalgaecellsisthebottleneckofmicroalgaebioener灢gyindustrialization.Tosolvethisproblem,theeffectofdifferentecologicalhabitationontheauto灢flocculationofOchromonassp.wasstudiedbycomparingtheauto灢flocculationofOchromonassp.underBG11(BG灢11MediumforBlueGreenAlgae),gluBG11(with10g/LofBG11)anddomesticwastewater.TheresultsshowedthattheOchromonassp.flocculationefficiencywashigherindomesticwastewaterinthepHrangefrom1to8,andthefloccula灢tionefficiencyreached86.01%whenthepHwas2,whichmeansOchromonassp.flocculatedbetterunderlowpHvaluesindomesticwastewater.Theflocculationefficiencywas30%un灢derpHfrom11to12inthedomesticwastewater,whichwaslowerthantheoneinBG11(72.39%)andwasduetothelowMg2+concentrationinthedomesticwastewater.Theaddi灢tionofglucosecanacceleratetheproductionAOM(AlgalOrganicMatter)ofOchromonassp.,whichretainedtheflocculationprocess.Thisstudyprovidesimportantinstructionsofthehighefficientmicroalgalharvestincomplicatedwastewaterenvironments.Keywords:Ochromonassp.;domesticwastewater;auto灢flocculation;AOM*收稿日期:2019灢08灢04基金项目:陕西省科技厅自然科学基础研究计划项目(2017JQ5097);陕西科技大学自然科学预研基金项目(2016BJ