Ho ea ka khatiso ea 2018 ea Shanghai Municipal Local Standard for Integrated Wastewater Discharge (DB31/199-2018), setsi sa ho ntša metsi a litšila sa setsi sa ho fehla motlakase se sebelisoang ke Baosteel Co., Ltd. se sebakeng sa metsi se bobebe. Ka lebaka leo, moeli oa ho tsoa ha ammonia nitrogen o fokotsehile ho tloha ho 10 mg/L ho ea ho 1.5 mg/L, 'me moeli oa ho tsoa ha lintho tse phelang o theotsoe ho tloha ho 100 mg/L ho ea ho 50 mg/L.

Sebakeng sa letamo la metsi a kotsi: Ho na le matamo a mabeli a metsi a kotsi sebakeng sena. Lisebelisoa tse ncha tsa marang-rang tsa ho lekola ammonia nitrogen li kentsoe ho etsa hore ho be le tlhokomelo e tsoelang pele ea maemo a ammonia nitrogen matamong a metsi a kotsi. Ho feta moo, ho kentsoe pompo e ncha ea sodium hypochlorite dosing, e hokahaneng le litanka tse teng tsa polokelo ea sodium hypochlorite 'me e hokahane le sistimi ea tlhahlobo ea ammonia nitrogen. Tlhophiso ena e thusa ho laola ka mokhoa o itekanetseng le o nepahetseng oa litekanyetso bakeng sa matamo a mabeli a metsi a kotsi.

Mokhahlelong oa pele oa ho hloekisa metsi oa Mokhahlelo oa I oa setsi sa ho hloekisa metsi ka lik'hemik'hale: Lits'ebetso tsa marang-rang tsa ho lekola ammonia nitrogen li kentsoe tankeng ea tlhakiso, tanka ea metsi a litšila ea B1, tanka ea metsi a litšila ea B3, tanka ea metsi a litšila ea B4 le tanka ea B5. Litsamaiso tsena tsa ho beha leihlo li hokahane le pompo ea sodium hypochlorite dosing ho thusa ho laola dosing ka boiketsetso nakong eohle ea kalafo ea drainage.

Lisebelisoa tse Sebelisitsoeng:

NHNG-3010 Online Automatic Ammonia Nitrogen Monitor

YCL-3100 Intelligent pretreatment system bakeng sa sampole ea boleng ba metsi

Ho ipapisa le litekanyetso tse nchafalitsoeng tsa ho fehla motlakase, polante ea Baosteel Co., Ltd. Sistimi e ntseng e le teng ea ho hloekisa metsi a litšila e se e ntlafalitsoe le ho nchafatsoa ho netefatsa hore ammonia nitrogen le organic matter li tšoaroa ka nepo ho fihlela litlhoko tse ncha tsa ho qhala. Lintlafatso tsena li tiisa ho hloekisoa ha metsi a litšila ka nako e nepahetseng 'me li fokotsa haholo likotsi tsa tikoloho tse amanang le phallo e feteletseng ea metsi a litšila.

Ke hobane'ng ha ho hlokahala ho beha leihlo maemo a ammonia nitrogen libakeng tsa ho ntša metsi a liloala tsa tšepe?

Ho metha ammonia nitrogen (NH₃-N) ha ho putlama leloala la tšepe ho bohlokoa bakeng sa ts'ireletso ea tikoloho le ho latela melaoana, kaha ts'ebetso ea tlhahiso ea tšepe ka tlhaho e hlahisa metsi a litšila a nang le ammonia a bakang likotsi tse kholo haeba a lahliloe ka mokhoa o sa lokelang.

Taba ea pele, ammonia nitrogen e chefo haholo ho lintho tse phelang metsing. Esita le maemong a tlaase, e ka senya khetla ea litlhapi le lintho tse ling tse phelang metsing, ea senya tšebetso ea tsona ea metabolism, 'me ea baka lefu la batho ba bangata. Ho feta moo, ammonia e feteletseng metsing e baka eutrophication - mokhoa oo ammonia e fetoloang li-nitrate ka baktheria, e leng se etsang hore algae e ata. Palesa ena ea algal e senya oksijene e qhibilihisitsoeng metsing, 'me e etsa "libaka tse shoeleng" moo boholo ba lintho tse phelang metsing li ke keng tsa phela, haholo-holo tikoloho ea metsing.

Taba ea bobeli, liloala tsa tšepe li tlanngoe ka molao ho latela maemo a naha le a lehae a tikoloho (mohlala, China's Integrated Wastewater Discharge Standard, Taelo ea EU's Industrial Emissions Directive). Litekanyetso tsena li beha meeli e tiileng holim'a likhakanyo tsa ammonia nitrogen metsing a litšila a lahliloeng. Tlhokomelo ea kamehla e etsa bonnete ba hore mekotla e finyella meeli ena, ho qoba likotlo, ho emisoa ha mosebetsi, kapa likoloto tse bakoang ke ho se latele melao.

Ho feta moo, litekanyo tsa ammonia nitrogen li sebetsa e le sesupo sa bohlokoa sa tšebetso ea leloala la ho hloekisa metsi a litšila. Haeba maemo a ammonia a feta tekanyetso, e bontša mathata a ka bang teng tšebetsong ea phekolo (mohlala, ho se sebetse hantle ha likarolo tsa phekolo ea likokoana-hloko), ho lumella baenjiniere ho tseba le ho lokisa mathata hang-hang—ho thibela metsi a litšila a sa hloekisoang kapa a sa tšoaroeng hampe ho kena tikolohong.

Ka bokhuts'oanyane, ho beha leihlo ammonia nitrogen ha ho e-tsoa leloala la tšepe ke mokhoa oa mantlha oa ho fokotsa kotsi ea tikoloho, ho latela litlhoko tsa molao, le ho boloka ts'epahalo ea lits'ebetso tsa ho hloekisa metsi a litšila.