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磷酸銨鎂法處置含氮磷廢水研討停頓

更新時候:2010-12-24 14:21 來歷:中國給水排水 作者: 姚濤 蔡偉民 李龍海 瀏覽:118242 網友批評0

 

摘 要:  論述了磷酸銨鎂在廢水中的構成機理及其在廢水處置中的操縱近況。在廢水處置 中操縱鎂鹽作積淀劑能夠同時去除廢水中的氮和磷,該體例去除率高、反映速率快、污泥體積小,同 時還可收受接管磷酸銨鎂,具備必然的操縱遠景。   

關頭詞:  磷酸銨鎂;  化學積淀;  前提溶度積;  廢水處置 

磷酸銨鎂(MgNH4 PO4 ·6H2O)俗稱鳥糞石,英 文稱號struvite (magnesium ammonium phosphate) ,簡 稱MAP。廢水處置中的磷酸銨鎂(MAP)法便是將 Mg2 +插手到含有磷酸鹽和氨氮的污水中反映天生 難溶的磷酸銨鎂積淀,從而去除污水中的磷酸鹽和 氨氮。

YUCHUANTONGHUOXINGWUNIFABINI,GAITILINENGGOUXUEJIAN49% DEWUNITIJI。LINSUANANMEIBUZHIZAIHUAGONG、YIYAOHEXIUJIAN FANCHOUYOUPUBIANDECAOZONG,GENGSHIYIZHONGGAOXIAODEHUANSHIFEILIAO,JINGYOUJINCHENG CHIHUANDIKAISHIYANGFENJIDAXIANZHIDIXUEJIANFEICAIZHONGDAN、LINJINRU SIZHOUSHUITI,BIMIANFUYANGFENHUADEFASHENG。JIANGFEISHUIZHONGDAPILIN SUANYANZHUANHUATIANSHENGLINSUANANMEIYIYINFALIANGDUOSHUICHUZHIZHUANJIADELEQU。

1 水中磷酸銨鎂構成機理

1. 1 LINSUANANMEIXIAORONGDU

磷酸銨鎂是一種很是龐雜的晶體化合物。水中 pH值的變更對其天生反映有很大影響,隨pH值的 變更,水中的NH4+  、Mg2 +和PO4- 3 濃度不時變更,當 這三種離子的活度積跨越了磷酸銨鎂的溶度積常數 (Ksp )時,溶液過飽和而后發生積淀。這三種離子的 活度取決于系統的pH值和溶液中可溶的Mg、N和 磷酸鹽的濃度。別的,離子強度、溫度和水中的雜 質都會對上述三種離子的活度發生影響,進而影響 磷酸銨鎂的積淀。到今朝為止,已有良多人經由進程 嘗試和化學均衡計較得出磷酸銨鎂的溶度積常數 (3. 89 ×10- 10 ~7. 08 ×10- 14 ) 。

1. 2 LINSUANANMEIQIANTIRONGDUJI

LINSUANANMEIDEXIAORONGXINGBINGBUSHIYOUTADERONGDUJICHANGSHUDAN DUJIEZHI,AdnanDENG[ 3 ]DUIZHAOLELINSUANANMEIZAICHUNSHUIHEWUNI XIAOHUAYEZHONGDEXIAORONGQINGKUANG,FAMINGLINSUANANMEIZAIXIAOHUAYEZHONGGENG QINGYIXIAORONG。WEILEZAIGONGCHENGSHANGJINGQUEZHANWANGLINSUANANMEIDEXIAORONG XING, StummDENGYUANYONGLEQIANTIRONGDUJI( PS )DEGAINIAN,JIZHI SHIZAIGEIDINGDECHANGSHIQIANTIXIA(BIFANGZAIBIRANpHZHIXIA)CAIKE HEYONGDEJUNHENGCHANGSHU。LINSUANANMEIDEPS NENGGOUJIESHUOWEI: 

1. 3 LINSUANANMEIDEGOUCHENG

PSeqSHOUpHZHIYINGXIANGHENDA:GENZHUpHZHIDEXIAJIANG,SHUIZHONG PO3 - 4 ZENGTIAN,ERMg2 +HENH+ 4 NONGDUJIJUJIANGLUO,LINSUANAN MEIDEPSeqMINJIEXIAJIANG,DANGPS > PSeqSHISHUIZHONGDELINSUANANMEI DAODAGUOBAOHE,DANGGUOBAOHEDUDAODABIRANSHUZHISHILINSUANANMEI ZEJIDIANCHULAI。HUOZAIBUYIDEpHZHIXIA,ZENGTIANGOUCHENGLIN SUANANMEIDESANZHONGLIZIZHONGRENYILIZIDEHANLIANGYENENGGOUSHIXITONG ZHONGLINSUANANMEIDAODAGUOBAOHE。LINSUANANMEIDEGUOBAOHEDUβ ( degree of supersaturation)JIESHUOYIXIA:

FANSHIYIβBIANBIEJIEJINGHEJIDIAN,DANGβDAYULINJIEGUOBAO HEDUSHIRONGYEYOUJIEJINGZHUANGKUANGBIANCHENGJIDIAN,RONGYEZHONGCHENGXIANDAPI DELINSUANANMEIWEIJING,ZHEXIEJINGLIHENNANCHANGDA。SHIYI,ZAIFEISHUI CHUZHIHEHUAGONGCHUCHANZHONG,WEILESHIFANYINGXITONGCHUZHIXIAOLIJISHENG CHENGDECHANPINPINZHIHAO,PUTONGDOUSHILINSUANANMEIFANYINGCHUZAIJIEJING JINCHENG。AdnanDENG[ 3 ]YIWEIFANYINGDEGUOBAOHEDUZAI1~5ZHI JIANSHIXITONGCHUYUYABUBIANQU,LINSUANYANDEQUCHULVHETIANSHENGDE LINSUANANMEIJINGTINENGDAODAZUIHAO。HirasawaDENGZHENGMING,DANG GUOBAOHEDUXIAOYULINJIEGUOBAOHEDUSHIJINGLICHENGCHANGDEXIANSULVYU GUOBAOHEDUCHENGYICIXIANXINGGANXI。JINGTIZAIGOUCHENGSHIYAODIANMOCHENG HEHEJINGTICHENGCHANGLIANGGEJIEDUAN。LINSUANANMEIJINGTICHENGCHANGHENFU ZA,BUZHISHOURONGYEZHONGCHUANZHIHEJINGLIWAIBIAOJILEIXINGZIDEYINGXIANG, BINGQIESHOUQINGKUANGDEYINGXIANGYEHENDA:LINSUANANMEIGENGRONGYIZAIWAIBIAOCU CAO、GUANDAODEPILIANCHUDENGQINGKUANGSHENFENBIANGENGDECHUSUODUIJI 。

2 在廢水處置中的操縱

2. 1 MEIDELAILI

RUOSHIWUSHUICHUZHICHANGDIDIANDIQUSHUIDEYINGDUBINIGAO,TONG CHANGGAIDIDEWUSHUIHUIHANYOUDAPIDEMEILIZI。DANGFEISHUIZHONGDEMEI YANQUEFASHI,NENGGOUCHASHOUQIYUDEMEIYAN。RUOSHIWUSHUICHUZHISHE SHIWEIYUHAIBIANSIZHOU,NEIMOCAOZONGHAISHUIHUOYANRUCHONGRENMEIYUANSHI GEBINIJINGJIJIANJIEDETILI。TunayDENG[ 5 ]YONGMgCl2 QUCHU HANYOUDAPIANDANDEZHIGEFEISHUI。YANGHUAMEIYINWEIDUIQINGKUANGYINGXIANG XIAO、XIAORONGDUJIAOXIAOHEYOUJIAOQIANGDEJIANXINGERBEIPUBIANLIYONG。 YANGZHUFEISHUIDEYANYANGXIAOHUAYEZHONGFANSHIWUXUWAIJIAMEIYAN,XIAOHUAYE ZHONGDEMEICHONGZUYUANDANJIZHENGLINSUANYANTIANSHENGLINSUANANMEIJIDIAN。

2. 2 ANDANHELINDELAILI

FANSHIDOUHUIHUKOUWUSHUIZHONGDEHANDANHUAHEWUZAIBAIBEIJINCHENG ZHONGHUIFASHENGDAPIANDAN,YIXIEHUAGONGZHIGEFEISHUI、LAOLINGDEZHAZI SHENLVYEZISHENHUIHANYOUGAONONGDUDEANDAN,FANSHIJUEDUIFEISHUI ZHONGDEMEIHELIN,ANDANSHISHILIANGDE。WUSHUIZHONGDELINYIZHENGLINSUAN YAN、JULINSUANYANHEWUJILINDENGQINGSHIXIAORONGYUSHUIZHONG。ZAIWUSHUI CHUZHICHANGDEYANYANGCHULINCHIZHONG,JULINFENHUAGOUCHENGWUJILINKAISHI HUIWUSHUIZHONG, JafferDENG[ 6 ]WEISloughWUSHUICHUZHICHANGDEGEGE CHUZHIJUCUOCUOSHIZHONGDEANDAN、ZONGLINJIMEIYANZUOLEWULIAOJUNHENGTU,XUAN ZEYANYANGXIAOHUAWUNITUOSHUIHOUDEHUILIUYEZUOWEIFANYINGWUDELAILI BUZHIQUCHUSHUIZHONGDAPIYANGFENYAN,BINGQIEBIMIANLEHUILIUYEGUAN DAOBEILINSUANANMEIGENGSAI。

2. 3 LINSUANANMEIFATUODANCHULIN

LINSUANANMEI(MAP)JIDIANFADUIGAONONGDUDEANDANFEI SHUIJUBEIHENHAODECHUZHICHENGGUO,XIANGGAIFEISHUIZHONGCHASHOUMEIYANHELIN SUANYANKEMINJIEQUCHUFEISHUIZHONGDEANDAN。ZdybiewskaDENGFAMING DANGpHWEI8~10SHISHUITIZHONGCANSHENGDEANDANLIANGZUIDI。JINCHAO GUOJIYIZAIZHEFANGMIANZUOLELIANGDUORENWU,JIANBIAO1 。 BIAO1 MAPQUCHUANDANCHANGSHICHENGGUO  

Ohlinger和Jaffer等以為為了保障磷的高 去除率( > 80% ) ,反映器內的pH應為8. 2~9。E2 lisabeth等用流化床處置磷酸鹽濃度為61 mg/L 的 廢水,插手NaOH使水中pH在8. 5時磷的去除率達 到94%。Abe在處置磷酸鹽濃度為162 mg/L的 廢水時,經由進程將pH值升到8. 52使得磷的去除率達 到81%。Battistoni等處置消化污泥上清液時,不 加堿而接納吹脫水中二氧化碳使廢水的pH由7. 9 升到8. 3~8. 6,磷酸鹽的去除率也到達80%。Jaffer 等發明n (Mg2 ++ ) ∶n ( PO4 - 3 )是1. 05∶1時,經由進程將 廢水中的pH 下降至9. 0, 磷酸鹽的去除率高達 97%;但n (Mg2 + ) ∶n ( PO4- 3 ) < 1. 05時磷酸鹽的去 除率只要72%。

3 論斷

LINSUANANMEIFACHUZHIFEISHUIQUCHULVGAO、FANYINGSULVKUAI,HUAN KESHOUSHOUJIEGUANLINSUANANMEI。ZAIXIANSHICAOZONGZHONG,HUANXUYAOJINYIBUYOU HUAFANYINGWUPEIBIBINGBINIJINGJIDIDIAOLIpHZHI,YIZUODAOYUN XINGBUBIANQIETIANCHUCHANPINJUBEIGENGGAODESHOUSHOUJIEGUANDAIJIA。

 

申明:轉載此文是出于通報更多信息之目標。如有來歷標注毛病或加害了您的正當權利,請作者持權屬證明與本網接洽,咱們將實時改正、刪除,感謝。

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