2 mhando dzezviwanikwa zvinogona kudzoserwa ne nanofiltration tekinoroji

Chii chinonzi nanofiltration?

Nanofiltration (NF) is a semi-permeable membrane (an ultra-thin selective barrier) inoshandiswa kusefa zvinwiwa mumaindasitiri akasiyana siyana. Nanofiltration pore size iri pakati pe1 ~ 10 nm, pakati pe reverse osmosis uye ultrafiltration, uye ndiyo yechipiri dense firimu.

Mvura inosundirwa nemu membrane nekumanikidza: zvimedu zvidiki pane dhayamita ye nanofiltration membrane aperture ichapfuura, nepo zvimedu zvakakura kupfuura dhayamita ye nanofiltration membrane aperture ichabatwa. Zvicherwa hazvigone kungovharirwa nekusasirwa saizi chete, asi zvinogona zvakare kusarudza kukwezva kana kudzinga zvimwe zvinosvibisa zvichienderana nekuchajisa kwavo kana hukama hwemakemikari, kuteya ne membrane pamusoro pemakemikari mhedzisiro.

Nanofiltration inovandudza kunaka kwemvura, uye inoshandisa simba shoma pane reverse osmosis (RO). Nekurapwa kweimwe mvura isingade kubvisa salinity yakakwirira, nanofiltration membranes inogona kushandiswa seimwe inoshanda imwe membrane yeRO, ine kugona kubvisa mabhakitiriya, mavhairasi, organic matter uye bivalent ions.

Nanofiltration pakutanga yakashandiswa kubvisa sulfate muindasitiri yemafuta uye gasi, asi ikozvino inoshandiswa muindasitiri yekuchenesa mvura, semuenzaniso, kupfava kwemvura, kunwa mvura uye kurapa huwandu hukuru hwemaindasitiri emarara uye brine. Munguva pfupi yapfuura, nanofiltration yakashandiswawo kubvisa zvinosvibisa zvinobuda mumvura yekunwa.

Nanofiltration tekinoroji inogona kutanga yadzoreredza yemhando yepamusoro mvura yakakodzera kushandiswazve, zvinoenderana nepfungwa yehupfumi hwedenderedzwa, asi zvakare kuburikidza nekudzoreredza kwezvimwe zviwanikwa (senge zviwanikwa zvipenyu, zvicherwa uye makemikari) zvishoma nezvishoma iri kutariswa mumusika.

Sodium hydroxide (NaOH)

Sodium hydroxide (NaOH) inyuchi ine alkaline munyu inoshatisa nekunyungudutsa organic uye inorganic zvinhu. Nokudaro, inoshandiswa mukuchenesa, kubvisa mafuta uye kubvisa maitiro mumaindasitiri akasiyana-siyana.

Nekuda kwekuwanda kwezvinosvibisa mumarara caustic soda, haiwanzo kushandiswa zvakare mukugadzirwa kwemaindasitiri. Pane kudaro, mamwe makemikari, akadai sehydrochloric kana sulfuric acid, anoda kuwedzerwa kuderedza alkalinity. Nekudaro, ne nanofiltration tekinoroji, tsvina caustic soda inogona kudzoserwa uye kushandiswazve nekubvisa tsvina.

Mumwe wevatengi vakuru vedunhu vecaustic soda iSouth Asia, iyo ine indasitiri hombe yemachira. Pano, caustic soda solution haingoshandiswi chete kuchenesa, asi zvakare chikamu chakakosha chekugadzira machira, kunyanya mukuita bleaching uko inovandudza simba, kupenya uye dhayi hukama hwekotoni fiber.

Kubva 2020, isu takagamuchira kubvunzwa kazhinji kune nanofiltration membranes mumusika weSoutheast Asia. Naizvozvo, mugore rimwe chete, kambani yedu yakavaka yayo nanofiltration membrane yekugadzira mutsara. Ita kutaurirana kwehunyanzvi nezvikwata zvinobva kune mukurumbira pasi rose mhando seDow, HYDRANAUTICS, Toray, Vontron, nezvimwe.

HID HNF-8040HF ndiyo yedu yekutanga modhi ye nano membrane, iyo yakava huru yekusimudzira modhi uye yakarumbidzwa zvakanyanya nevashandisi muindasitiri yemachira.

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Fetereza yakadzokororwa

Phosphorus, icho chakakosha mufotereza, yave kushaikwa, izvo zviri kupa kuti vanhu vatyire kuchengetedzwa kwechikafu kwenguva refu. Phosphorus chinhu chine magumo chinobva kune phosphate migodhi. Nenzvimbo dzepasi rose phosphorus dziri kudzikira uye dzakaganhurirwa kumatunhu ega ega, cheni dzekugovera dziri panjodzi.

Panguva imwecheteyo, kuwandisa kwechikafu ichi kwakakosha kuri kukanganisa nharaunda, zvichikonzera kusvibiswa kwakanyanya kumuviri wemvura kuburikidza nemaitiro eutrophication. Nekutora uye kudzoreredza ichi chikafu kuti chigadzire zvipenyu, matambudziko maviri anogona kugadziriswa panguva imwe chete: kuchengetedzwa kwechikafu uye kukanganisa kwezvakatipoteredza.

Kunyangwe nanofiltration isiri nzira yakakosha yekugadzirwa kwefetereza, inogona kugadzira chigadzirwa chemhando yepamusoro nekubvisa tsvina uye kuisa zvinovaka muviri mumajusi ekugaya. Neyo nzira ye-coagulation-flocculation, iyo mbishi inogona kusvibiswa nemakemikari akasara, nepo nanofiltration inodzivirira dambudziko iri nekuparadzanisa mumuviri kuburikidza ne membrane pane makemikari. Pamusoro pekugadzira zvemhando yepamusoro zviwanikwa zvebhayoloji uye kugadzira purofiti yevashandisi vekupedzisira, mhando yemvura yakabviswa yakavandudzwa zvakare uye mutengo wekurapwa kwebiosolids wakaderedzwa.