海水电池资源化利用虾池养殖废水的实验研究施毅君

351Vol.35No.120191JournalofFujianNormalUniversityNaturalScienceEditionJan.2019.DOI10.12046/j.issn.1000-5277.2019.01.0101000-5277201901-0068-07121131313131.3500072.4000423.350007Mg2+NH4+P．、pH、．OH-pH10.0．1∶1NH4+-NP38.12%98.78%．15～35℃．21mW．O646A2018-04-112007Y00261987－、[e-mail]eＲesourceUtilizationoftheShrimpPondWastewaterbytheSeawaterBatterySHIYi-jun1HUＲun-zhi2FUJian-ling1CHENＲi-yao13JINYan-chao13ZHENGXi13CHENXiao131.CollegeofEnvironmentalScienceandEngineeringFujianNormalUniversityFuzhou350007China2.SinopharmChongqingPharmaceuticalandMedicalIndustryDesignInstituteCorporationChongqing400042China3.FujianKeyLaboratoryofPollutionControlandＲesourceＲeuseFuzhou350007ChinaAbstractThemagnesiumanodecorrosionoftheseawaterbatterygeneratedMg2+whichcouldformstruvitewiththeNH4+andPphosphorusintheshrimppondwastewater．Itcouldrealizere-sourceutilizationinthisway．TheinfluencesoftheP∶NmolarratiothepHvalueandthetemper-atureontheelectricitygenerationandthestruviteprecipitationhavebeeninvestigated．TheresultsshowthathydroxylioncouldbegeneratedbythecathodesothatthepHvalueofwastewaterwassta-bleataboutpH10.0whichcouldprovideappropriatealkalineconditionfortheprecipitation．In-creasingtheP∶Nmolarratioto1∶1couldenhancethestruvitecrystallizationandtheNH4+-NandPrecoveryratioswere38.12%and98.78%respectively．Increasingtemperaturecouldshortenthetimeneededforrecoveriesintherangefrom15℃to35℃．Theseawaterbatteriescouldgeneratedstableelectricityanditwasabout21mWduringtheexperiments．KeywordsshrimppondwastewaterseawaterbatterystruviteNH4+-Nphosphorus．20%～30%NH4+-NP1．NH4+-NP2．．．132090．MgNH4PO4·6H2O、．1．Mg2++NH4++PO3－4+6H2→OMgNH4PO4·6H2O↓14．MgCl25．Gunay6MgO．Lee7．．．．100a8．－2.37VvsSHE－2.31VvsSHE－1.25VvsSHE9．．、10．．．Mg2+NH4+-NP．、pH、．11.199.80%NH4Cl、KH2PO4、HCl、NaOH．4℃．1.21Fig.1Schematicofthelab-scaledevice1252cm234cm22Ω3cm．．．0.9L．1.3NH4+-NP0.45μm．700nm11．NH4+-N420nm11．Cary5000．NH4+-NP962019ηN=ρN0－ρNtρN0×100%2ηP=ρP0－ρPtρP0×100%3ρN0mg·L－1ρP0mg·L－1NH4+-NP．ρNtmg·L－1ρPtmg·L－1tNH4+-NP．Pt=ItUt4ItmAUtVt．1.430s30s30s．700r·min－11h．25℃pHpH1∶1．3．22.11∶11NH4+-N15.62%2．1hP84.50%7h98.65%0.17mg·L－1．2cOH－pH9.010.0．Mg∶N∶P1∶1∶1KH2PO42a2P∶N1∶1NH4+-N38.12%．P98.78%．NH4+-NP∶N2∶1NH4+-N1∶1P∶N．P3.91mg·L－1．NH4+、Mg2+、PO43－pH12．Mg2+．PNH4+-N．MgOH2Mg3PO4213．PNH4+-N1∶1P∶N．1Tab.1CharacteristicsoftheshrimppondwastewaterpHρNH4+-N/mg·L－1ρP/mg·L－1ρ/mg·L－17.60±0.3913.66±0.943.05±0.1557.00±1.123.10±0.102NH4+-NPTab.2ＲesidualconcentrationsandrecoveryratiosofNH4+-NandPatdifferentP∶NratiosρNH4+-N/mg·L－1ηN/%ρP/mg·L－1ηP/%PN11.63±0.3415.62±0.760.17±0.0198.65±0.47nP∶nN=1∶19.73±0.1838.12±0.190.90±0.0698.78±0.40nP∶nN=2∶18.65±0.6840.03±2.163.91±0.0397.99±0.010712P∶NFig.2ExperimentsatdifferentP∶Nratiosfromtheshrimppondwastewater2.2pHpHpH=8.03hNH4+-N19%．pH9.03aNH4+-N37.23%．pH．pHNH4+NH314．pH10.5NH4+-N3a．pH=9.015．pH=9.0pHNH4+-N50.54%6.35mg·L－13．pH=8.0P85.85%．3pH9.092.78%．3bpH8.0P．pH=10.095.27%．pH8.09.0P．Mijangos16MgNH4PO4·6H2OMg3PO42．pH10.0P．NPpH=9.0pH=10.0pH．pH8.010.02c．pH．3pHNH4+-NPnP∶nN=1∶1Tab.3ＲesidualconcentrationsandrecoveryratiosofNH+4-NandPunderdifferentpHconditionsnP∶nN=1∶1ρNH4+-N/mg·L－1ηN/%ρP/mg·L－1ηP/%pH=8.08.65±0.4732.06±1.9614.70±0.4385.85±0.30pH=9.06.35±0.3450.54±1.076.29±0.1492.78±0.29pH=10.06.49±0.8845.69±0.234.07±0.9095.27±0.073pHnP∶nN=1∶1Fig.3ExperimentsunderdifferentpHconditionsfromtheshrimppondwastewaternP∶nN=1∶11720192.3152535℃．4a15～35℃．15℃3hNH4+-N19.7%．35℃3hNH4+-N33.49%．4b15℃35℃1hP59.56%73.39%．P1.22mg·L－10.43mg·L－14．Bhuiyan1755℃．Mg2+．pH4c15℃pH10.0．Zhou13pH9.0MgOH2．35℃pH9.5．pH=9.535℃NH4+-N39.08%4．4NH4+-NPnP∶nN=1∶1Tab.4ＲesidualconcentrationsandrecoveryratiosofNH4+-NandPatdifferenttemperaturesnP∶nN=1∶1ρNH4+-N/mg·L－1ηN/%ρP/mg·L－1ηP/%15℃8.11±0.2736.70±0.531.22±0.0398.69±0.0825℃8.11±0.1838.12±0.191.85±0.0698.78±0.4035℃8.52±0.2039.08±0.340.43±0.0799.51±0.084nP∶nN=1∶1Fig.4ExperimentsatdifferenttemperaturefromtheshrimppondwastewaternP∶nN=1∶12.45Fig.5Outputpowerofseawaterbatteriesunderdifferentconditions51h．/MgOH2．．1h．271．．5a5c．7h20mW26mW．5bpH．pHpHMgOH2．1h21mW．．3Mg2+、OH－．NH4+-N．1∶1NH4+-N38%．pHNH4+-NpH=9.0NH4+-N50%．．P98%．．0.9L21mW．1LUPATSCHIKISSILGW．PredictingaquaculturewastefromgiltheadseabreamSparusauratacultureusinganutri-tionalapproachJ．AquatLivingＲesour1998114265－268．2ＲYUHDKIMDLEESI．ApplicationofstruviteprecipitationintreatingammoniumnitrogenfromsemiconductorwastewaterJ．JHazardMater20081561163－169．3SHULSCHNEIDEＲPJEGATHEESANVetal．Aneconomicevaluationofphosphorusrecoveryasstruvitefromdi-gestersupernatantJ．BioresourTechnol200697172211－2216．4ZHANGTDINGLＲENHetal．Ammoniumnitrogenremovalfromcokingwastewaterbychemicalprecipitationrecy-cletechnologyJ．WaterＲes200943205209－5215．5LIUZZHAOQLEEDJetal．EnhancingphosphorusrecoverybyanewinternalrecycleseedingMAPreactorJ．BioresourTechnol200899146488－6493．6GUNAYAKAＲADAGDTOSUNIetal．UseofmagnesitasamagnesiumsourceforammoniumremovalfromleachateJ．JHazardMater20081561/3619－623．7LEESIWEONSYLEECWetal．ＲemovalofnitrogenandphosphatefromwastewaterbyadditionofbitternJ．Chemosphere2003514265－271．8WILCOCKWSKAUFFMANPC．Developmentofaseawaterbatteryf