Txoj hauv kev yog MBR + DTRO. Txoj kev no muab kev kho mob lom neeg thiab lub cev, siv tag nrho qhov zoo ntawm txhua tus thaum kov yeej lawv qhov tsis zoo. Qhov no ua kom ruaj khov thiab txhim khu kev qha kev kho mob uas ua tau raws li cov qauv tso tawm, thaum txuag av, peev, thiab cov nqi khiav lag luam, thiab ua kom yooj yim rau kev khiav lag luam thiab kev tswj hwm.
Tshooj 1: Cov Lus Qhia Txog Kev Siv Dej Num
Cov kab ke lom neeg muaj xws li homogenization thiab sib npaug ntawm lub tank, homogenization tank, lub tank denitrification, lub tank nitrification, sludge kho system, thiab cov cuab yeej pabcuam (cov twj tso kua mis, cov khoom siv tshuaj, cov tshuab cua txias, thiab txhua yam khoom siv tsis tau teev nyob rau hauv lwm lub tshuab).
Leachate los ntawm lub tank sib npaug yog thawj zaug nqa mus rau hauv lub hnab lim ntsia saum lub tank homogenization. Lub hnab lim tuaj yeem cuam tshuam cov teeb meem loj dua 0.5mm. Lub hnab lim yuav tsum tau hloov thaum lub siab poob mus txog ib qho nqi. Lub hnab lim tuaj yeem rov qab siv tau tom qab ntxuav.
Cov lim dej lim dej ntws los ntawm lub ntiajteb txawj nqus mus rau hauv lub tank homogenization. Lub tov khoom nyob rau hauv lub tank agitates thiab sib tov leachate los ntawm ntau qhov chaw thiab nyob rau lub sij hawm sib txawv, ua kom tiav homogenization thiab stabilizing lub influent rau cov chaw kho mob tom ntej. Cov kab mob lom neeg feem ntau muaj lub tank denitrification, lub tank nitrification, defoaming system, thiab cua txias. Cov cuab yeej pabcuam los ntawm lwm lub tshuab kuj suav nrog hauv cov kab mob lom. Muaj ib txheej ntawm denitrification tanks thiab ib txheej ntawm nitrification tanks. Cov effluent los ntawm qhov sib npaug ntawm lub tank nkag mus rau hauv cov kab ke lom neeg ntau lawm. Cov kab mob lom neeg yog AO-hom roj ntsha reactor. Aerobic microorganisms nyob rau hauv lub reactor decompose thiab siv cov organic teeb meem nyob rau hauv dej, synthesizing cell ntaub so ntswg thiab tso dej thiab carbon dioxide. Ib feem ntawm ammonia nitrogen hauv dej yog siv rau kev sib txuas ntawm tes hauv cov tshuaj tiv thaiv tshem tawm, thiab cov seem yog siv los ntawm cov kab mob nitrifying los tsim nitrates thiab nitrites. Cov nitrates thiab nitrites raug xa rov qab mus rau lub tank denitrification nrog cov kua nitrification, qhov twg denitrification tshwm sim hauv ib puag ncig anaerobic. Cov nitrates thiab nitrites raug txo, tsim cov roj nitrogen uas khiav tawm, yog li ua tiav kev tshem tawm nitrogen.
Lub aeration system muaj xws li dav hlau aerators, dav hlau twj, thiab blowers. Lub dav hlau twj tso kua mis muab siab - ntws- tus nqi siab cov dej, thaum lub tshuab tshuab muab cua compressed. Ob qho khoom sib xyaw ua ke thiab tso tawm los ntawm cov raj venturi ntawm lub dav hlau aerators, tsim cov microbubbles uas sib npaug thoob plaws hauv dej, ua tiav cov pa oxygenation ntau dua 25%. Qhov no ib txhij ua tiav tag nrho cov dej ntim agitation. Lub tank kev kho mob lom yog ib qho kev sib xyaw ua ke tag nrho; siab-concentration leachate nkag mus rau hauv lub cev yog diluted tam sim ntawd thiab diffused, tiv thaiv kev puas tsuaj rau cov kab mob.
Vim muaj cov sludge siab concentration nyob rau hauv lub tank kho lom, nws raug nquahu kom siv siab -oxygenation-efficiency European- dav hlau aerators los xyuas kom meej cov tshuaj lom neeg zoo.
Vim muaj cov yam ntxwv tshwj xeeb ntawm cov khib nyiab pov tseg, cov npuas dej ntau yuav raug tsim tawm thaum lub sijhawm cog qoob loo lom neeg thiab ua haujlwm. Cov txheej txheem no suav nrog cov tshuaj defoaming thiab hydraulic defoaming. Tshuaj defoaming suppresses ua npuas ncauj los ntawm kev ntxiv defoaming agents, thaum hydraulic defoaming tshem tawm npuas los ntawm txau dej ntawm qhov chaw tseem ceeb xws li manholes thiab installation qhov.
Cov txheej txheem biochemical ua rau muaj qhov kub thiab txias, nce qhov kub ntawm lub reactor thiab cuam tshuam kev ua haujlwm. Yog li ntawd, lub tshuab ua kom txias yog siv, siv lub tshuab cua txias los muab cov dej txias rau cov tso tsheb hlau luam biochemical los ntawm cov khoom siv hluav taws xob. Qhov no ib qho cua txias system txias ob lub tank nitrification. Lub tshuab biochemical tswj tsis siv neeg feem ntau muaj ntau yam sensors, input / output modules, thiab PLC. Kev saib xyuas dej muaj txiaj ntsig feem ntau saib xyuas tus nqi ntws, kev coj ua, thiab pH. Cov tso tsheb hlau luam biochemical feem ntau saib xyuas pH, yaj oxygen, kub, thiab qib kua. Kev soj ntsuam ntawm cov kev txwv no tswj cov aeration tus nqi, sludge paug tus nqi, thiab ultrafiltration (UF) lub sij hawm ua hauj lwm los tsim ib qho chaw tsim nyog rau cov kab mob.
UF system siv dej los ntawm cov tank nitrification rau sludge- dej sib cais. Cov sludge concentrated - dej sib tov yog tom qab ntawd rov qab mus rau ntu denitrification li reflux sab hauv.
Cov txheej txheem biochemical tso tawm kwv yees li 12 tons ntawm sludge txhua hnub, nrog rau cov ntsiab lus noo noo tsim ntawm 98.5%. Vim tias qhov qis sludge concentration, sludge thickening tank yog suav nrog hauv qhov system rau lub ntiajteb txawj nqus thickening ntawm cov sludge tawm. Lub thickened sludge yog ces pumped mus rau lub centrifugal dewatering tshuab. Tom qab centrifugation, lub dewatered filtrate yog pumped rov qab mus rau biochemical system rau kev kho mob ntxiv. Lub ncuav mog qab zib sludge, nrog cov dej noo hauv qab 80%, raug xa mus rau qhov chaw pov tseg.
Ntu Ob: Ultrafiltration System Txheej Txheem Flow Description
Qhov no ultrafiltration system siv ib tug sab nraud tubular ultrafiltration system. Dej yog nqus los ntawm lub tank nitrification. UF inlet twj tso kua mis faib cov cawv sib xyaw los ntawm lub tank biochemical mus rau UF voj. Qhov siab tshaj plaws ultrafiltration siab yog 6 bar. Cov sludge - dej sib tov yog pumped rau hauv tubular membrane module ntawm lub twj tso kua mis circulating. Nyob rau hauv lub siab sib txawv ntawm daim nyias nyias, cov kua theem permeates los ntawm daim nyias nyias, tsim permeate, ua tiav sludge- dej sib cais. Cov sludge raug xa rov qab mus rau lub tank biochemical kom nce cov sludge concentration nyob rau ntawd, thaum tib lub sij hawm ua tiav kev rov ua haujlwm ntawm nitrification cawv. Ib feem ntawm cov sludge yog tawm raws li cov sludge nyob rau hauv lub sludge thickening tank. Lub permeate yog tawm mus rau hauv lub ultrafiltration ntshiab dej tank thiab nkag mus rau cov txheej txheem tom ntej.
Piv nrog rau cov txheej txheem kev kho mob ib txwm muaj, cov kab mob microbial raug cais tawm ntawm cov kua dej los ntawm kev ua haujlwm siab - ua haujlwm ultrafiltration system, kom ntseeg tau tias cov teeb meem me me loj dua 0.02 µm, cov kab mob, thiab COD- cuam tshuam txog cov khib nyiab pov tseg tau ruaj ntseg hauv lub cev. Qhov no ua tiav qhov tseeb sib cais ntawm hydraulic tuav lub sij hawm thiab sludge tuav lub sij hawm. Los ntawm kev tswj lub hnub nyoog sludge, lub hom phiaj ntawm kev cog qoob loo ntau ntawm cov kab mob nitrifying tau ua tiav, yog li txhim kho ammonia nitrogen tshem tawm tus nqi. Lub ultrafiltration effluent yog tsis muaj menyuam, tsis muaj khib nyiab, thiab tsis muaj cov tshuaj lom neeg lom neeg. Sludge concentration yog tswj los ntawm kev nruam reflux hauv cross-flow ultrafiltration.
Lub kaw lus ultrafiltration muaj ib lub voj, nrog plaub lub raj hauv txhua lub voj. Ib lub twj tso kua mis sib cais muab qhov yuav tsum tau khiav raws li cov phab ntsa sab hauv ntawm cov hlab ntsha membrane, tsim kom muaj kev kub ntxhov, tsim kom muaj cov dej ntws loj, thiab tiv thaiv kev txhaws.
Cov hlab ntsha membrane tseem yuav tsum tau yaug thiab ntxuav tom qab lub sijhawm ua haujlwm, uas ua tiav los ntawm lub twj tso kua mis tu siv lub tank ntxuav uas muaj dej ntshiab lossis kua ntshiab. Txhua lub voj tuaj yeem raug ntxuav, ntxuav, lossis khaws cia thaum lwm lub voj voog ua haujlwm. Lub valve tsis siv neeg compressed cua tswj tau ib txhij txiav tawm cov khoom noj, thiab cov sludge tshuav nyob rau hauv cov kav dej yog nqa mus rau lub tank kho lom los ntawm cov dej ntws tawm.
CIP yog ib qho kev sib tw - zaus. Thaum lub sij hawm tom qab ntawm kev tu, li qub qhib raws li ib qho kev pab cuam, tso cai rau cov dej ntxuav kom circulate nyob rau hauv daim nyias nyias loops thiab rov qab mus rau lub tank tu kom txog thaum kev tu huv si tiav. Yog tias tsim nyog, ib qho me me ntawm cov tshuaj ntxuav cov membrane tuaj yeem muab ntxiv rau hauv lub tank tu thaum lub sij hawm tom qab ntawm kev ntxuav.
Tshooj 3: DTRO (Disc Tube Rov Qab Osmosis Membrane System) Cov Txheej Txheem Flow Description
Txawm hais tias feem ntau cov organic teeb meem thiab cov pa phem nitrogenous hauv MBR effluent tau raug tshem tawm, cov qib tseem nyob deb ntawm kev ua raws li cov qauv tso tawm. Cov dej tseem muaj ntau cov organic teeb meem, scaling ions, thiab lwm yam pa phem, ua rau muaj kev pheej hmoo loj rau kev ruaj ntseg ntawm cov khoom siv sib cais membrane tom qab. Vim yog cov qauv kev tso tawm nruj, thiab cov qauv tshiab cov kev xav tau rau tag nrho cov nitrogen, cov txheej txheem membrane yuav tsum muaj kev tsis lees paub siab rau nitrates, thiab lwm yam. Qhov kev tsim qauv no siv DTRO (Disc Tube Reverse Osmosis Membrane System) nrog rau kev muaj zog tiv thaiv - fouling muaj peev xwm thiab cov nqi rov qab siab. Landfill leachate muaj ib tug complex muaj pes tsawg leeg, muaj ntau yam sparingly soluble ntsev xws li calcium, magnesium, barium, thiab silicon. Cov ntsev me me uas tsis muaj kuab lom no yog cov concentrated heev tom qab nkag mus rau qhov rov qab osmosis system. Thaum lawv cov concentration tshaj lawv solubility nyob rau hauv tej yam kev mob, scaling yuav tshwm sim nyob rau hauv daim tawv nqaij. Kho cov pH ntawm cov dej nyoos zoo tiv thaiv kev scaling los ntawm carbonate inorganic ntsev; Yog li ntawd, pH ntawm cov dej nyoos yuav tsum tau kho ua ntej nkag mus rau qhov rov qab osmosis system.
MBR effluent yog pumped rau hauv DTRO membrane kem ntawm DTRO feed twj tso kua mis. Tib lub sijhawm, cov kua qaub ntxiv los ntawm cov kua qaub cia tank los kho cov pH thiab refluxed rau kev sib xyaw, ua tiav pH equilibrium. DTRO system pub kab yog nruab nrog pH sensor. PLC txiav txim siab pH dej nyoos thiab hloov kho lub ntsuas twj tso kua mis zaus los tswj cov kua qaub ntxiv, thaum kawg ua kom cov pH ntawm cov kua dej nyoos ua ntej nkag mus rau qhov rov qab osmosis system nce mus txog 6.1-6.5. Cov pH- kho cov dej nyoos yog tso rau hauv DTRO membrane kem. Lub DTRO system muaj ib txheej, txhua qhov nruab nrog ob lub hnab ruaj ntseg lim. Lub siab sensors ntawm ob lub qhov hluav taws xob thiab qhov hluav taws xob ntawm txhua lub hnab ruaj ntseg lim tau pom qhov sib txawv siab. Thaum qhov sib txawv siab tshaj qhov pib, lub kaw lus ceeb toom rau kev hloov lub hnab lim. Ob lub hnab lim kev ruaj ntseg ua haujlwm ua ke, tso cai rau hloov lub hnab lim online. Cov lim kev ruaj ntseg muaj qhov pom tseeb ntawm 50μm, muab qhov kev tiv thaiv zaum kawg rau daim nyias nyias. Cov dej nyoos dhau los ntawm lub hnab ruaj ntseg lim ncaj qha nkag mus rau lub siab - lub twj tso kua mis siab. Cov kua dej ntws tawm, nias los ntawm lub siab - lub twj tso kua mis siab, nkag mus rau DTRO membrane kem. Thawj theem membrane yog muab ncaj qha nrog dej los ntawm lub siab - lub twj tso kua mis siab. Txhua theem membrane yog nruab nrog lub twj tso kua mis hauv online, uas rov qab ib feem ntawm cov concentrate ntawm lub qhov hluav taws xob membrane mus rau hauv lub twj tso kua mis hauv internet kom paub meej txaus txaus tus nqi thiab tshaj tawm ntawm daim nyias nyias, tiv thaiv membrane fouling.
Lub membrane effluent muab faib ua concentrate thiab permeate. Lub siab regulating valve ntawm lub concentrate kawg tswj lub siab nyob rau hauv lub membrane module kom ua tau raws li qhov tsim nyog purified dej rov qab tus nqi. Cov concentrate yog tawm mus rau hauv lub tank concentrate rau kev kho mob ntxiv. Lub permeate nkag mus rau hauv lub tank dej ntshiab kom ua tau raws li nws tus kheej xav tau kev tu. Cov dej ntau dhau yog tawm mus rau hauv lub tank effluent equalization tank thiab ces pumped rau hauv cov dej tau txais lub cev. Qhov system rov qab tus nqi yog 80%.
Lub cev rov qab osmosis yog qhov nruab nrab -siab rov qab osmosis system siv disc tube thim rov qab osmosis membranes. Qhov nruab nrab kev khiav hauj lwm siab ntawm lub disc raj rov qab osmosis membrane yog 30-70 bar, nrog rau siab tshaj plaws txwv ntawm 70 bar rau nruab nrab - siab rov qab osmosis. Txij li cov dej pub mis yog ultrafiltration clarified kua, cov kua ntshiab ntshiab tuaj yeem ncav cuag 80%. DTRO system muaj ib chav tsev, nrog rau tag nrho ntawm 70 disc raj rov qab osmosis membrane kab thiab tag nrho cov membrane cheeb tsam ntawm 658.3 m².
DTRO chav tsev yog nruab nrog cov chaw pabcuam hauv qab no:
⑴ CIP (Clean-Nyob hauv-Place) system: CIP system yog siv rau kev tso dej, ntxuav dej, thiab tshuaj ntxuav lub cev rov qab osmosis.
⑵ Acid dosing system: Txhawm rau tiv thaiv kev ua kom tsis muaj kab mob hauv lub sijhawm ua haujlwm rov qab osmosis, cov kua qaub dosing system tau teeb tsa los kho tus nqi pH ntawm qhov rov qab osmosis system pub dej.
⑶ Antiscalant dosing system: Lub antiscalant dosing system kuj tseem siv los tiv thaiv kev tsim ntawm inorganic scaling thaum rov qab osmosis ua haujlwm.
Vim hais tias cov leachate yog pretreated siv ib tug tag nrho biological denitrification membrane bioreactor, lub ultrafiltration effluent yog dawb ntawm tshem tawm cov khib nyiab thiab biodegradable organic teeb meem. Qhov no feem ntau zam qhov tsim ntawm inorganic thiab organic fouling ntawm qhov rov qab osmosis daim nyias nyias, yog li txo qhov zaus ntawm rov qab osmosis membrane tu thiab tso cai rau rov qab osmosis system ua haujlwm nyob rau hauv qis qis, ncua kev pab cuam lub neej ntawm rov qab osmosis membrane.