He aha kāu e hoʻolohe ai i ka hoʻohana ʻana i ka mika BOD5?

He aha kāu e hoʻolohe ai i ka wā e hoʻohana ai i kaHelu BOD:
1. Hoʻomākaukau ma mua o ka hoʻokolohua
1. E ho'ā i ka mana o ka incubator biochemical 8 mau hola ma mua o ka hoʻokolohua, a e hoʻomalu i ka mahana e hana maʻamau ma 20 ° C.
2. E hoʻokomo i ka wai hoʻoheheʻe hoʻokolohua, ka wai inoculation a me ka wai dilution inoculation i loko o ka incubator a mālama iā lākou i ka mahana mau no ka hoʻohana ʻana ma hope.
2. Ka hoʻomaʻamaʻa mua ʻana o ka wai
1. Inā ʻaʻole ma waena o 6.5 a me 7.5 ka pH waiwai o ka hāpana wai;E hana mua i ka ho'āʻo ʻokoʻa no ka hoʻoholo ʻana i ka nui o ka waika hydrochloric (5.10) a i ʻole ka hopena sodium hydroxide (5.9), a laila hoʻokaʻawale i ka hāpana, me ka nānā ʻole inā he ua.Ke kiʻekiʻe loa ka ʻakika a i ʻole ka alkalinity o ka hāpana wai, hiki ke hoʻohana ʻia ka alkali a i ʻole ka waikawa kiʻekiʻe no ka neutralization, me ka hōʻoia ʻana ʻaʻole i emi ka nui ma lalo o 0.5% o ka nui o ka hāpana wai.
2. No nā la'ana wai i loa'a ka li'ili'i o ka chlorine manuahi, e nalo loa ka chlorine manuahi ma hope o ka waiho 'ana no 1-2 mau hola.No nā laʻana wai kahi hiki ʻole ke nalo ka chlorine manuahi i loko o kahi manawa pōkole, hiki ke hoʻohui ʻia ka nui kūpono o ka solution sodium sulfite e wehe i ka chlorine manuahi.
3. Pono e hoʻomaʻamaʻa koke ʻia nā ʻano wai i hōʻiliʻili ʻia mai nā kino wai me nā mahana wai haʻahaʻa a i ʻole nā ​​loko eutrophic a hiki i ka 20°C no ka hoʻokuke ʻana i ka oxygen hoʻoheheʻe supersaturated i loko o nā ʻano wai.Inā ʻaʻole, e haʻahaʻa ka hopena o ka nānā ʻana.
I ka lawe ʻana i nā laʻana mai nā kino wai me nā mahana wai kiʻekiʻe a i ʻole nā ​​​​waho hoʻokuʻu wai ʻino, pono lākou e hoʻomaʻalili koke a ma kahi o 20 ° C, i ʻole e kiʻekiʻe ka hopena o ka nānā ʻana.
4. Inā ʻaʻohe microorganisms a i ʻole lawa ka hana microbial o ka wai e hoʻāʻo ʻia, pono e hoʻokaʻawale ʻia ka hāpana.E like me nā ʻano wai ʻino ʻoihana:
a.ʻO ka wai ʻino ʻoihana i mālama ʻole ʻia me ka biochemically;
b.ʻO ka wela kiʻekiʻe a me ke kiʻekiʻe kiʻekiʻe a i ʻole ka wai ʻōpala sterilized, pono e uku ʻia i ka wai ʻino mai ka ʻoihana hana meaʻai a me ka wai hoʻoheheʻe home mai nā haukapila;
c.ʻO ka wai ʻawaʻawa ikaika a me ka alkaline ʻoihana wai;
d.ʻO ka wai ʻino ʻoihana me ka waiwai BOD5 kiʻekiʻe;
e.ʻO ka wai ʻino ʻoihana i loaʻa nā mea ʻona e like me ke keleawe, zinc, lead, arsenic, cadmium, chromium, cyanide, etc.
Pono e mālama ʻia ka wai ʻino ʻoihana ma luna me nā microorganisms lawa.ʻO nā kumu o nā microorganism penei:
(1) Hoʻokomo ʻia ka supernatant o ka wai hoʻoheheʻe hale hou i mālama ʻole ʻia ma 20°C no 24 a 36 mau hola;
(2) ʻO ka wai i loaʻa ma ke kānana ʻana i ka hāpana ma o ka pepa kānana ma hope o ka pau ʻana o ka hoʻāʻo mua.Hiki ke mālama ʻia kēia wai ma 20 ℃ no hoʻokahi mahina;
(3) Effluent mai nā mea kanu hoʻomaʻemaʻe wai;
(4) ʻO ka muliwai a i ʻole ka wai loko i loaʻa ka wai hoʻoheheʻe kūlanakauhale;
(5) ʻO nā maʻi bacteria i hāʻawi ʻia me ka mea kani.E kaupaona i ka 0.2g o ka maʻi bacteria, e ninini i loko o 100ml o ka wai maʻemaʻe, e hoʻoulu mau a hiki i ka wā e hoʻopuehu ʻia ai nā puʻupuʻu, e hoʻokomo i loko o kahi incubator ma 20 ° C a waiho i 24-48 mau hola, a laila lawe i ka supernatant.