Ngaba i-polyaluminum chloride ingasetyenziswa ekukhuliseni amakhaya

Oku kulandelayo luhlalutyo lokuba ingaba I-Polyaluminum Chloride (PAC) ingasetyenziswa kwi-aquaculture, idibene neenzuzo eziphambili kunye namanqaku asebenzayo:

Emva kwemvula enkulu, ichibi leentlanzi laba yindawo yokuhlambela enodaka ubusuku bonke. Ngaba i-polyaluminum chloride ingasindisa imeko engxamisekileyo?

A: Ewe! Kodwa kufuneka ukhethe uhlobo olufanelekileyo kwaye usebenzise indlela efanelekileyo

Ukucaciswa ngokukhawuleza kwamanzi acocekileyo: Xa imvula ikhukulisa udaka nesanti edamini, nto leyo ebangela ukudumba, ukusela i-PAC (etyheli) esemgangathweni kunokukhupha ngokukhawuleza amasuntswana axhonyiweyo ngokusebenzisa i-electro-neutralization kwiiyure ezingama-48, kwaye izinga lokususa ukudumba lingaphezulu kwe-90%.

Ingcamango yokhuseleko: kuyimfuneko ukukhetha iimveliso zamanzi okusela ezikumgangatho ofanayo no "Umgangatho wococeko lwamanzi okusela" (GB15892-2020) (i-aluminium oxide ≥29%, i-arsenic ≤0.0002%), kwaye uphephe umngcipheko wentsalela yesinyithi esinzima ye-PAC emdaka yemizi-mveliso.

Umzekelo: Emva kwenkanyamba, abalimi bezolimo zasemanzini eYancheng, kwiphondo laseJiangsu batshiza i-PAC yamanzi okusela ngedosi ye-2 kg/mu. Ukucaca kwamanzi kwabuyiselwa kwiiyure ezingama-24, kwaye izinga lokufa kweentlanzi ngenxa yoxinzelelo lehla ngama-60%.

Ngaba i-PAC ingayithintela ngokukhawuleza ifilimu eluhlaza yokuqhambuka kwe-cyanobacteria edamini?

A: Kuyasebenza ukuthintela i-algae kwixesha elifutshane, kodwa kufuneka kuthintelwe ukuphinda i-algae kwixesha elide.

I-algaecide engxamisekileyo: I-PAC itshabalalisa ibhalansi yetshaja yodonga lweseli ye-algal kwaye yenza i-cyanobacteria kunye ne-green algae ziqengqeleke zize zitshone. Xa itshizwa kuxinzelelo lwe-3g/m3, uxinano lwe-algal luyancipha nge-70% kwiiyure ezingama-72.

Imida: Yinto "yokususa intloko" yeekhemikhali kwaye ayinakukwazi ukuphelisa ubuthi be-algal. Emva kokuyisebenzisa kwichibi lesilivere le-carp kwiphondo laseJiangsu, i-algae yaphinda yavela kwiintsuku ezi-5, ngoko ke amalungiselelo eentsholongwane kufuneka asetyenziswe ukugcina ibhalansi yexesha elide.

Ingaba yinyani into yokuba i-PAC inokuyityhefa intlanzi kunye nee-shrimp?

A: Kukho iingozi, kodwa ziyalawuleka

Iingozi ezifihlakeleyo ze-aluminium: ukusetyenziswa kakhulu kunokukhokelela ekuqokeleleni kwe-aluminium kwi-fish gills nakwi-crustacean liver pancreas, nto leyo enokuthintela izinga lempumelelo ye-Japanese shrimp molting ukuya kuthi ga kwi-30%.

indawo yokulawula ebalulekileyo:

Umthamo: ngaphantsi kwe-3 grams/cubic meter yamanzi (malunga ne-2 jin/mu), ngaphezulu kwe-5 grams/cubic meter kuya kubangela ukuqunjelwa kwe-flocculation kuntante kwaye kunqongophale i-oxygen ye-sediment esezantsi;

Ukususwa kwedaka: Idaka ledaka kufuneka lisuswe zingadlulanga iiyure ezingama-48 emva kokusetyenziswa, kungenjalo i-hydrogen sulfide iya kukhululwa ngokubola.

Zeziphi iimeko ezingafanele zisebenzise i-PAC?

Ukusetyenziswa ngokuchanekileyo sisixhobo somlingo, ukusetyenziswa gwenxa yityhefu

I-Polyaluminum chloride isebenza njenge "scalpel yekhemikhali" kwi-aquaculture—— I-PAC ekumgangatho wokusela ingayisombulula ngokuchanekileyo imiba yomgangatho wamanzi ngequbuliso (ukudumba okubangelwa sisiphepho, iintyatyambo ze-algal), kodwa kufuneka isetyenziswe ngokuchanekileyo nangokusebenza kakuhle kwexesha elifutshane. Nje ukuba ukucaca kwamanzi kubuyiselwe, masibuyele kwinqanaba kwiintsholongwane kunye nezityalo zasemanzini—— Iikhemikhali ekugqibeleni zidlala indima exhasayo, ngelixa imijikelo yendalo ihlala iphambili ngonaphakade.