He aha ka hana inā kiʻekiʻe ka COD i ka wai ʻino?

ʻO ka koi oxygen kemika, i ʻike ʻia hoʻi ʻo ka hoʻohana ʻana i ka oxygen kemika, a i ʻole COD no ka pōkole, hoʻohana i nā mea hoʻokahe kemika (e like me ka potassium dichromate) e hoʻoheheʻe a hoʻoheheʻe i nā mea oxidizable (e like me nā mea organik, nitrite, nā paʻakai ferrous, sulfides, etc.) i ka wai, a laila helu ʻia ka hoʻohana ʻana o Oxygen ma muli o ka nui o ke koena oxidant. E like me ke koi ʻana o ka oxygen biochemical (BOD), he hōʻailona koʻikoʻi ia o ke ʻano o ka pollution wai. ʻO ka ʻāpana o COD he ppm a i ʻole mg/L. ʻO ka liʻiliʻi o ka waiwai, ʻoi aku ka haʻahaʻa o ka pollution wai. Ma ke aʻo ʻana i ka pollution o ka muliwai a me nā waiwai wai ʻino o ka ʻoihana, a me ka hana a me ka hoʻokele ʻana i nā mea kanu hoʻomaʻemaʻe wai, he mea koʻikoʻi a me ke ana wikiwiki ʻia ʻo COD pollution parameter.
Hoʻohana pinepine ʻia ka koi oxygen kemika (COD) ma ke ʻano he hōʻailona koʻikoʻi no ke ana ʻana i ka ʻike o ka mea organik i ka wai. ʻOi aku ka nui o ke koi oxygen kemika, ʻoi aku ka koʻikoʻi o ke kino wai e hoʻohaumia ʻia e nā mea organik. No ke ana ʻana i ke koi oxygen kemika (COD), ʻokoʻa nā helu i ana ʻia ma muli o nā mea hōʻemi i ka wai wai a me nā ʻano ana. ʻO nā ʻano hoʻoholo maʻamau i hoʻohana ʻia i kēia manawa, ʻo ia ke ʻano hoʻonā ʻana o ka potassium permanganate acid a me ke ʻano o ka potassium dichromate oxidation.
He mea pōʻino loa ka mea organik i nā ʻōnaehana wai ʻoihana. ʻO ka ʻōlelo koʻikoʻi, ʻo ka koi oxygen kemika pū kekahi me nā mea hoʻohaʻahaʻa inorganic i loko o ka wai. ʻO ka maʻamau, ʻoiai ʻoi aku ka nui o nā mea organik i ka wai ʻino ma mua o ka nui o nā mea inorganic, hoʻohana maʻamau ka koi oxygen kemika e hōʻike i ka nui o nā mea ola i loko o ka wai ʻōpala. Ma lalo o nā kūlana ana, ʻoi aku ka paʻakikī o ka hoʻoheheʻe ʻana i nā mea organik i loaʻa ʻole ka nitrogen i ka wai e ka potassium permanganate. No laila, kūpono ka hoʻohana ʻana i ka oxygen no ke ana ʻana i ka wai kūlohelohe a i ʻole ka wai ʻōpala maʻamau i loaʻa i nā mea kūlohelohe maʻalahi, aʻo ka wai ʻona ʻenehana me nā mea paʻakikī e hoʻohana pinepine ʻia no ke ana ʻana i ka koi oxygen kemika.
ʻO ka hopena o COD ma nā ʻōnaehana mālama wai
Ke hele ka wai i loko o ka nui o nā mea ola i loko o ka ʻōnaehana desalination, e hoʻohaumia ia i ka resin hoʻololi ion. I waena o lākou, he mea maʻalahi loa ka hoʻohaumia ʻana i ka resin exchange anion, a laila e hōʻemi ana i ka hiki ke hoʻololi i ka resin. Hiki ke hoʻemi ʻia ka mea organika ma kahi o 50% i ka wā o ka hoʻomaʻamaʻa mua (coagulation, clarification and filtration), akā ʻaʻole hiki ke hoʻoneʻe maikaʻi ʻia nā mea organik i ka ʻōnaehana desalination. No laila, lawe pinepine ʻia ka wai make-up i loko o ka paila e hoʻemi i ka waiwai pH o ka wai paila. , e hoʻopōʻino ai i ka ʻōnaehana; I kekahi manawa hiki ke lawe ʻia nā mea ola i loko o ka ʻōnaehana mahu a me ka wai condensate, e hōʻemi ana i ka waiwai pH, a hiki ke hoʻoulu i ka ʻōnaehana.
Eia kekahi, ʻoi aku ka nui o nā mea organik i loko o ka ʻōnaehana wai e hoʻolalelale i ka hana microbial. No laila, me ka nānā ʻole o ka desalination, ka wai paila a i ʻole nā ​​​​pūnaewele wai, ʻoi aku ka haʻahaʻa o ka COD, ʻoi aku ka maikaʻi, akā i kēia manawa ʻaʻohe helu helu helu.
'Ōlelo Aʻo: I loko o ka ʻōnaehana wai hoʻoluʻu kaʻapuni, inā ʻoi aku ka COD (KMnO4 method) ma> 5mg/L, ua hoʻomaka ka maikaʻi o ka wai.
ʻO ka hopena o ka COD ma ke kaiaola
ʻO ka maʻiʻo COD kiʻekiʻe, aia ka wai i ka nui o nā mea hoʻohaʻahaʻa, ʻo ka nui o nā mea haumia. ʻO ke kiʻekiʻe o ka COD, ʻoi aku ka koʻikoʻi o ka pollution organik i ka wai kahawai. ʻO nā kumu o kēia pollution organik he mau pesticides, mea kanu kemika, mea hoʻomomona, a me nā mea ʻē aʻe. Inā ʻaʻole mālama ʻia i ka manawa, hiki ke hoʻopili ʻia nā mea haumia he nui e ka sediment ma lalo o ka muliwai a waiho ʻia, e hōʻeha mau ai i ke ola wai i nā mea e hiki mai ana. makahiki.
Ma hope o ka make ʻana o ka nui o nā ola wai, e hoʻopau mālie ʻia ke kaiaola o ka muliwai. Inā hānai nā kānaka i ia mau mea i loko o ka wai, e komo lākou i ka nui o nā meaʻawaʻawa mai kēia mau mea ola a hōʻiliʻili iā lākou i loko o ke kino. ʻO kēia mau toxins he carcinogenic, deformational, a mutagenic, a he mea pōʻino loa i ke olakino kanaka. Eia kekahi, inā hoʻohana ʻia ka wai o ka muliwai haumia no ka hoʻoulu ʻana, e hoʻopilikia pū ʻia nā mea kanu a me nā mea kanu a ulu maikaʻi ʻole. ʻAʻole hiki ke ʻai ʻia kēia mau mea kanu haumia e ke kanaka.
Eia nō naʻe, ʻaʻole pono ke koi ʻana o ka oxygen kemika kiʻekiʻe e loaʻa nā pōʻino i ʻōlelo ʻia ma luna, a hiki ke loaʻa ka hopena hope ma o ka nānā kikoʻī. No ka laʻana, e noʻonoʻo i nā ʻano mea olaola, he aha ka hopena o kēia mau mea ola i ka maikaʻi o ka wai a me ka ecology, a inā he pōʻino ia i ke kino kanaka. Inā ʻaʻole hiki ke ʻike kikoʻī, hiki iā ʻoe ke ana i ke koi oxygen kemika o ka hāpana wai ma hope o kekahi mau lā. Inā hāʻule nui ka waiwai i hoʻohālikelike ʻia me ka waiwai ma mua, ʻo ia hoʻi, ʻo nā mea hoʻohaʻahaʻa i loko o ka wai he mea maʻalahi hiki ke hoʻopau ʻia. He pōʻino ia mea ola kino i ke kino o ke kanaka a he mea liʻiliʻi nā pōʻino olaola.
Nā ala maʻamau no ka hoʻohaʻahaʻa ʻana i ka wai ʻino COD
I kēia manawa, ʻo ka adsorption method, chemical coagulation method, electrochemical method, ozone oxidation method, biological method, micro-electrolysis, etc.
ʻano ʻike COD
Hiki ke loaʻa nā hopena pololei o COD ma hope o ka hoʻohui ʻana i nā reagents a me ka hoʻoheheʻe ʻana i ka hāpana ma 165 degere no 10 mau minuke. He mea maʻalahi ka hana, he haʻahaʻa haʻahaʻa reagent, haʻahaʻa pollution, a haʻahaʻa ka hoʻohana ʻana i ka ikehu.

https://www.lhwateranalysis.com/cod-analyzer/


Ka manawa hoʻouna: Feb-22-2024