Pollution control enterprise kan nih angin sewage treatment plant hna pawimawh ber chu effluent chu standards a tlin theih nan a ni. Mahse, discharge standard khauh tak a awm chhoh zel avang leh environment humhalhna endiktute chetsualna avang hian sewage treatment plant-ah hian operational pressure nasa tak a thlen a ni. Tui chhuah chu a harsa tial tial tak zet a ni.
A ziaktu thil hmuhchhuah dan chuan tui chhuahna standard thlen harsatna chhan dik tak chu ka ram bawlhhlawh paihna hmunah hian a tlangpuiin vicious circle pathum a awm vang a ni.
A hmasa ber chu sludge activity hniam (MLVSS/MLSS) leh sludge concentration sang tak vicious circle a ni a; a pahnihna chu phosphorus paih chhuahna chemical hman tam poh leh sludge a chhuak tam zawk tih vicious circle a ni a; pathumna chu hun rei tak chhunga bawlhhlawh sawngbawlna hmun Overload operation, hmanrua siam that theih loh, kum khat chhung natna nen a kal a, hei hian bawlhhlawh sawngbawl theihna tihtlem vicious circle a thlen a ni.
#1
Sludge activity hniam leh sludge concentration sang lutuk vicious circle
Professor Wang Hongchen hian bawlhhlawh paihna hmun 467-ah zirchianna a nei tawh a ni. Sludge activity leh sludge concentration data hi han thlir ila: Heng sewage plant 467 zingah hian sewage treatment plant 61% chuan MLVSS/MLSS 0.5 aia tlem an nei a, treatment plant 30 % vel chuan MLVSS/MLSS 0.4 hnuai lam an nei a ni.
Sewage treatment plant 2/3-a sludge concentration chu 4000 mg/L aia tam a ni a, sewage treatment plant 1/3-a sludge concentration chu 6000 mg/L aia tam a ni a, sewage treatment plant 20-a sludge concentration chu 10000 mg/L aia tam a ni.
A chunga kan sawi tak dinhmun (sludge activity hniam, sludge concentration sang) te hian eng nge a rah chhuah? Thudik thlirletna technical article tam tak kan hmu tawh a, mahse a awlsam zawnga sawi chuan a rah chhuah pakhat a awm a, chu chu tui chhuahna hian standard a pel tihna a ni.
Hei hi kawng hnih a\angin sawifiah theih a ni. Khawthlang lamah chuan sludge concentration a san hnuah sludge deposition awm loh nan aeration tihpun a ngai a ni. Aeration tihpun hian power consumption a tipung mai bakah biological section a tipung bawk. Dissolved oxygen tihpun hian denitrification atana carbon source mamawh chu a snatch ang a, hei hian biological system-a denitrification leh phosphorus removal effect chu direct-in a nghawng ang a, N leh P tam lutuk a siam ang.
A lehlamah chuan sludge concentration sang tak hian mud-water interface a tisang a, secondary sedimentation tank atanga effluent nen chuan sludge chu awlsam takin a bo thei a, hei hian advanced treatment unit chu a block ang emaw, effluent COD leh SS te chu standard a pelh phah ang.
A rah chhuah kan sawi zawh hnuah, engvangin nge sewage plant tam zawkin sludge activity hniam leh sludge concentration sang harsatna an neih chhan hi han sawi ila.
Dik tak chuan sludge concentration sang chhan chu sludge activity a hniam vang a ni. Sludge activity a hniam avangin treatment effect tihchangtlun nan sludge concentration tihpun a ngai a ni. Sludge activity hniam chhan hi influent water-ah hian slag sand tam tak a awm a, chu chu biological treatment unit-ah a lut a, a pung zauh zauh a, hei hian microorganisms te hnathawh a nghawng a ni.
Tui lo lut ah hian slag leh sand a tam hle. Pakhat chu grille-a interception effect a chhe lutuk a, pakhat zawk chu ka rama bawlhhlawh sawngbawlna hmun 90% aia tam chuan primary sedimentation tank an siam lo a ni.
Mi thenkhat chuan, engvangin nge primary sedimentation tank siam loh ang? Hei hi pipe network chungchang a ni. Ka ramah hian pipe network-ah hian harsatna a awm a, chu chu misconnection, mixed connection, leh missing connection te hi a ni. Chumi avang chuan sewage plant-a influent water quality hian a tlangpuiin thil pathum a nei a, chungte chu inorganic solid concentration (ISS) sang, COD hniam, C/N ratio hniam.
Influent tuiah hian inorganic solids concentration a sang hle a, chu chu sand content a sang hle tihna a ni. A tir chuan primary sedimentation tank hian inorganic substance thenkhat a tihtlem thei a, mahse influent water COD a tlem avangin sewage plant tam zawk chuan primary sedimentation tank siam suh mai mai a ni.
A tawp berah chuan low sludge activity hi “heavy plants leh light nets” legacy a ni.
Sludge concentration sang leh activity hniam chuan effluent-ah N leh P tam lutuk a awm dawn tih kan sawi tawh a. Hetih lai hian bawlhhlawh paihna hmun tam zawkte chhanna tur chu carbon source leh inorganic flocculants te dah belh a ni. Mahse, pawn lam carbon source tam tak dah belh a nih chuan power consumption a tipung lehzual dawn a, flocculant tam tak dah belh chuan chemical sludge tam tak a siam ang a, chu chuan sludge concentration a tipung ang a, sludge activity a tihhniam belh bawk ang a, vicious circle a siam ang.
#2
Phosphorus paih chhuahna chemical hman tam poh leh sludge siam tamna vicious circle.
Phosphorus paih chhuahna chemical hman hian sludge siamchhuahna chu 20% atanga 30%, a aia tam pawh a tipung a ni.
Sludge buaina hi kum tam tak chhung chu sewage treatment plant-te ngaihtuah ber a ni a, a chhan ber chu sludge chhuahna tur kawng a awm loh vang emaw, chhuahna kawng a nghet lo vang emaw a ni. .
Hei hian sludge kum a ti rei a, chu chuan sludge aging phenomenon a thlen a, chubakah sludge bulking ang chi thil dik lo lian zawk a thlen bawk.
Expanded sludge hian flocculation a nei tha lo hle. Secondary sedimentation tank atanga effluent hloh a nih chuan advanced treatment unit chu a block a, treatment effect a tlahniam a, backwashing water a pung bawk.
Backwash tui tam lutuk hian a rah chhuah pahnih a thlen dawn a, pakhat chu biochemical section hmasa lama treatment effect tihtlem a ni.
Backwash tui tam tak chu aeration tank-ah a kir leh a, chu chuan structure-a hydraulic retention time tak tak chu a ti tlem a, secondary treatment-a treatment effect pawh a ti tlem a
A pahnihna chu depth processing unit-a processing effect tihhniam belh zel a ni.
Backwashing tui tam tak chu advanced treatment filtration system-ah dah kir leh a ngai avangin filtration rate a sang a, filtration capacity tak tak pawh a tlahniam a ni.
Treatment effect pumpui chu a tha lo hle a, hei hian effluent-a phosphorus leh COD zawng zawng chu standard a pel thei a ni. Standard aia tam lo turin sewage plant hian phosphorus removal agents hman a tipung dawn a, hei hian sludge a tipung lehzual dawn a ni.
vicious circle-ah a lut ta a ni.
#3
Hun rei tak chhunga bawlhhlawh paihna hmuna overload leh bawlhhlawh sawngbawlna tihtlem theihna vicious circle
Sewage treatment hi mihringah chauh ni lovin, hmanruaah pawh a innghat a ni.
Tui thianghlim siamna kawngah hian bawlhhlawh paihna hmanrua te hi hun rei tak chhung chu an lo do tawh a ni. Siamthat fo a nih loh chuan a hma emaw a hnu emaw chuan harsatna a awm ang. Mahse, a tam zawkah chuan bawlhhlawh paihna hmanrua chu siamthat theih a ni lo, a chhan chu hmanraw pakhat chu vawi khat a ding chuan tui chhuahna chu standard a pel mai thei a ni. Nitin pawisa chawi dan kalphung hnuaiah chuan mi zawng zawngin an phur thei lo.
Professor Wang Hongchen-a’n khawpui bawlhhlawh sawngbawlna hmun 467 a zirchianna zingah hmun thuma ṭhena hmun hnih vel chuan hydraulic load rate 80% aia tam an nei a, hmun thuma ṭhena hmun khat vel chu 120% aia tam an nei a, bawlhhlawh sawngbawlna hmun 5 chu 150% aia tam an nei bawk.
Hydraulic load rate 80% aia tam a nih chuan, super-large sewage treatment plant tlemte tih loh chu, general sewage treatment plant-te chuan effluent chu standard a thleng tih ngaihtuahin maintenance atan tui chu an khar thei lo va, aerator leh secondary sedimentation tank suction leh scraper-te tan backup water a awm lo. A hnuai lam hmanrua chu a tui a chhuah chuan a pumin siamthat emaw thlak emaw theih a ni.
Chu chu, bawlhhlawh paihna hmun 2/3 vel chuan effluent-in standard a tlin leh tlin loh ngaihtuahin hmanrua chu an siam ṭha thei lo tihna a ni.
Professor Wang Hongchen-a zirchianna atanga a lan dan chuan aerator dam chhung hi a tlangpuiin kum 4-6 vel a ni a, mahse bawlhhlawh paihna hmun 1/4 chuan kum 6 chhung zet chu aerator-ah hian air-venting maintenance an nei lo. Mud scraper, empty leh siamthat ngai chu a tlangpuiin kum khat chhungin siamthat a ni lo.
He hmanrua hi damlohna nen a kal rei tawh hle a, tui thianghlim theihna pawh a chhe zual zel a ni. Tui chhuahna pressure tuar thei tur chuan maintenance atan tihtawp theih a ni lo. Chutiang vicious circle-ah chuan bawlhhlawh sawngbawlna system a awm reng dawn a, chu chuan tlakchhiatna a hmachhawn dawn a ni.
#4
a tawpah ziak rawh
Environment humhalhna hi ka ram ram pum huap policy bulpui anga din a nih hnuah tui, gas, solid, leilung leh bawlhhlawh paihna dangte chu a lo thang chak hle a, chung zingah chuan bawlhhlawh sawngbawlna field chu hmahruaitu a ni tih sawi theih a ni. Level tling lo, bawlhhlawh paihna hmun kalpui dan chu harsatnaah a tla a, pipeline network leh sludge buaina chu ka ram bawlhhlawh sawngbawlna industry-a tlakchhamna lian ber pahnih a lo ni ta a ni.
Tin, tunah chuan, tlin lohnate siam that a hun ta.
Post hun chhung: Feb-23-2022
