Dicyandiamide formaldehyde kapia whakaemi tae

I roto i ngā mahi tukatuka waipara ahumahi, ko te tā me te tae waipara tetahi o ngā mahi tino uaua ki te tukatuka. He uaua te hanganga, he nui te uara chroma, he nui te kukū, ā, he uaua ki te pirau. Ko tētahi o ngā mahi tino kino, tino uaua ki te tukatuka i ngā waipara ahumahi e whakapoke ana i te taiao. He tino uaua ake te tango i te chroma i roto i ngā mahi uaua.

I roto i ngā tikanga maha mō te tā me te tae i ngā wai para, ko te whakamahi i te whakapūmau te tikanga e whakamahia whānuitia ana i roto i ngā umanga. I tēnei wā, ko ngā mea whakapūmau wai tuku iho e whakamahia ana i roto i ngā umanga tā me te tae kakahu i tōku whenua he mea hanga ki te konumohe me te mea hanga ki te rino. He ngoikore te pānga tango tae, ā, ki te tangohia te tae tauhohe, tata kore he pānga tango tae, ā, ka noho tonu ngā katote konganuku i roto i te wai kua rongoatia, he mea tino kino tonu ki te tinana tangata me te taiao e karapoti ana.

Ko te kapia whakakore tae Dicyandiamide formaldehyde he momo tote ammonium quaternary. Ki te whakatauritea ki ngā kapia whakakore tae tuku iho, he tere te rere o te wai, he iti ake te horopeta, ā, he pānga ki ngā tote, te PH, me ngā painga pēnei i te iti o te pānga o te pāmahana.

Ko te kapia whakakore tae dicyandiamide formaldehyde he mea whakapūpū e whakamahia ana mō te whakakore tae me te tango COD. I te wā e whakamahia ana, me whakarite te pH o te wai para ki te koretake. Tena koa whakapā atu ki ngā tohunga hangarau mō ngā tikanga whakamahinga motuhake. E ai ki te maha o ngā mahi tahi. Ko te urupare mai i ngā kaihanga tā me te tae he pānga nui te kapia whakakore tae dicyandiamide formaldehyde ki te whakakore tae o te wai para tā me te tae. Ka taea e te tere tango chroma te neke atu i te 96%, ā, kua neke atu hoki i te 70% te tere tango COD.

I te tekau tau atu i 1950, i whakamahia tuatahitia ngā waikura polymer waro, ko te nuinga he waikura polyacrylamide, ā, ka taea te wehewehe i te polyacrylamide ki ngā waikura kore-ionic, anionic, me te cationic. I roto i tēnei tuhinga, ka mārama tātou ki te waikura acrylamide polymer dicyandiamide formaldehyde resin decolorizing kua totea ki te quaternary amine i roto i ngā waikura polymer waro cationic.

Ka tauhohe tuatahitia te wai whakapūkara whakakore tae o te dicyandiamide formaldehyde ki te acrylamide me te formaldehyde wairewa i raro i ngā āhuatanga kawakore, kātahi ka tauhohe ki te dimethylamine, kātahi ka whakamataohia, ka whakawhā-kātenetia ki te waikawa hauwaiora. Ka whakawhā-kōhikohia te hua mā te mimiti, ka tātarihia kia puta he monomer acrylamide kua whakawhā-kātenetia.

I te tekau tau atu i 1990, i whakaurua mai te dicyandiamide-formaldehyde condensation polymer decolorizing flocculant. He tino pai te pānga motuhake o tēnei ki te tango i te tae o te wai para tae. I roto i te maimoatanga o te wai para tae-nui me te kukū-nui, ko te polyacrylamide, ko te polyacrylamide rānei anake ka whakamahia. Kāore e taea e te flocculant polyaluminum chloride te tango katoa i te tae, ā, i muri i te tāpiri i te flocculant decolorizing, ka whakakorea te utu kino e piri ana ki ngā ngota tae i roto i te wai para mā te whakarato i te nui o ngā kationa, ā, ka whakararuraru. Hei whakamutunga, ka hangaia he maha o ngā floccules, ka taea te mimiti i ngā ngota tae i muri i te flocculation me te destabilization, kia tutuki ai te kaupapa o te decolorization.

Me pēhea te whakamahi i te tango tae:

He rite te tikanga whakamahi i te wai whakapūkara tango tae ki te polyacrylamide. Ahakoa he wai te mea tuatahi, me whakaranua i mua i te whakamahinga. E taunaki ana te kaihanga kia whakaranua ki te 10%-50%, kātahi ka tāpirihia ki te wai para, ka whakaohokia katoatia. Hangaia he putiputi konumohe. Ka whakapūkarahia te mea tae i roto i te wai para tae, ka puta mai i te wai, ā, kua rite ki te whakapūkara, ki te whakamānu rānei i te hau hei wehe.

I roto i ngā ahumahi tā me te tae, kakahu me ētahi atu ahumahi, he nui rawa te wai e pau ana, ā, he iti te tere o te whakamahi anō. Nō reira, he mea tino noa te moumou rauemi wai. Mena ka whakamahia te tukanga hei whakahaere i te maimoatanga matatau me te hangarua o tēnei wai para ahumahi he nui te tae me te kukū, ehara i te mea ka taea te whakaora i te nui o ngā rauemi wai ahumahi hou, engari ka taea hoki te whakaiti tika i te tukunga o te wai para ahumahi, he mea nui, he mea whānui hoki mō te whakatairanga i te whanaketanga pumau o ngā ahumahi tā, tae me te kakahu.

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