ʻEono kaʻina hana no ka hoʻoheheʻe ʻana i ka COD kiʻekiʻe

I kēia manawa, ʻoi aku ka nui o ka COD wai ʻōpala maʻamau i ka maʻamau e pili ana i ka electroplating, circuit board, papermaking, pharmaceutical, textile, printing and dyeing, chemical and other wastewater, no laila he aha ke ʻano o ka mālama ʻana no ka wai ʻino COD? E hele kāua e ʻike pū.
Hoʻokaʻawale COD wai ʻino.
Hoʻokaʻawale ʻia nā kumu o ka wai ʻino i loko o: wai ʻōpala ʻoihana, wai ʻōpala mahiʻai, a me nā wai ʻōpala.
ʻO ka wai hoʻoheheʻe hale e pili ana i ka hui ʻana o nā ʻano mea olaola like ʻole i haku ʻia me nā mea ʻole a me nā mea ola, me:
① E lana ana a i ʻole i hoʻokuʻu ʻia i nā ʻāpana paʻa nui a liʻiliʻi
②Colloidal a me ka gel-like diffusers
③Haina maʻemaʻe.
ʻO nā ʻano hana hoʻomaʻamaʻa o ka wai ʻino COD e komo pū ana:
Ka wehe ʻana o COD ma ke ʻano coagulation: hiki i ke ʻano coagulation kemika ke hoʻopau pono i nā mea ola i loko o ka wai ʻōpala a hōʻemi i ka COD i kahi nui. Hoʻokomo ʻia ke kaʻina hana coagulation, ma ka hoʻohui ʻana i ka flocculant, me ka hoʻohana ʻana i ka adsorption a me ka hoʻopili ʻana o ka flocculant, ua hoʻopaʻa ʻia ka papalua uila, no laila e hoʻoneʻe ʻia ka colloid a me ka mea i hoʻokuʻu ʻia i loko o ka wai. Hoʻohana ʻia ke kaʻina flotation e wehe i nā Particles i hoʻokaʻawale ʻia mai ka wai, i mea e hoʻokō ai i ke kumu o ka hoʻomaʻemaʻe ʻana i ke kino wai.
ʻO ke ala olaola no ka wehe ʻana i ka COD: ʻO ke ʻano biological kahi ʻano hana hoʻōla wai ʻino e hilinaʻi ana i nā enzyme microbial e oxidize a hōʻemi paha i nā mea kūlohelohe e hoʻopau i nā paʻa unsaturated a me nā chromophores e hoʻokō ai i ke kumu o ka mālama ʻana. I kēia mau makahiki i hala iho nei, ua hoʻohana nui ʻia nā microorganism i ka mālama ʻana i ka wai ʻōpala ma muli o ko lākou wikiwiki wikiwiki, hiki ke hoʻololi a me ke kumu kūʻai haʻahaʻa.
Wehe COD Electrochemical: ʻO ke kumu o ka mālama ʻana i ka wai ʻino electrochemical ka hoʻohana ʻana i ka electrolysis pololei a i ʻole e hoʻoneʻe i nā mea haumia i loko o ka wai, a i ʻole e hoʻololi i nā mea ʻona i nā mea ʻawaʻawa a haʻahaʻa.
Ka wehe ʻana i ka COD e ka micro-electrolysis: ʻO ka ʻenehana micro-electrolysis i kēia manawa he ala kūpono no ka mālama ʻana i ka wai ʻōpala kūlohelohe kiʻekiʻe, ʻike ʻia ʻo ka electrolysis kūloko. Hoʻohana ka mea hana i nā mea micro-electrolysis e hoʻopiha i ka wai ʻino ma lalo o ke ʻano o ka uila ʻole, a hoʻopuka i ka ʻokoʻa 1.2V ponoʻī iā ia iho e electrolyze i ka wai ʻōpala e hoʻokō i ke kumu o ka hoʻohaumia ʻana i nā mea haumia.
ʻO ka wehe ʻana o COD ma ke ʻano absorption: hiki ke hoʻohana ʻia ke kalapona i hana ʻia, ka resin macroporous, bentonite a me nā mea hana adsorption ʻē aʻe no ka adsorb a mālama i nā mea ola a me nā chroma i loko o ka wai. Hiki ke hoʻohana ʻia e like me ka pre-treatment e hōʻemi i ka COD i maʻalahi ke mālama.
ʻO ke ʻano o ka oxidation no ka wehe ʻana i ka COD: I nā makahiki i hala iho nei, ʻo ka noi ʻana o ka ʻenehana photocatalytic oxidation i ke kahua o ka mālama wai ʻino he mau mākeke maikaʻi a me nā pono waiwai, akā nui nā pilikia i ka noiʻi ʻana ma kēia kahua, e like me ka loaʻa ʻana o nā catalysts kiʻekiʻe. , kaʻawale a me ka hoʻihoʻi ʻana o nā catalysts e kali.