Ua like anei na ana COD a me BOD?

2. Koi Oxygen Biochemical (BOD)

· Wehewehe: ʻO ka BOD e pili ana i ka nui o ka oxygen dissolved i hoʻopau ʻia e nā microorganism i ka wā o ka decomposition o nā mea olaola biodegradable i loko o ka wai ma lalo o nā kūlana kikoʻī (maʻamau 20 °C no 5 mau lā, i kapa ʻia ʻo BOD₅). Ua hōʻike ʻia ma nā milligrams no ka lita (mg/L).
· Kumuhana: ʻOke olaola. ʻO ka hoʻohaʻahaʻa ʻana o nā mea ola e nā microorganism aerobic e hoʻohālikelike i ke kaʻina hoʻomaʻemaʻe kūlohelohe maoli i loko o nā kino wai.
· Nā mea i ana ʻia: Ana ʻo BOD i ka hapa wale nō o nā mea ola i hiki ke hoʻohaʻahaʻa ʻia.

Nā hiʻohiʻona:
· ʻOi aku ka lōʻihi o ke ana ʻana: ʻO ka lōʻihi o ka hoʻāʻo maʻamau he 5 mau lā (BOD₅).
· Hōʻike i nā kūlana kūlohelohe: Hāʻawi ia i ka ʻike i ka hiki ke hoʻohana ʻia ka oxygen maoli o nā mea olaola i nā kaiapuni kūlohelohe.
· Kiʻekiʻe kikoʻī: BOD pane wale aku i nā mea olaola.

3. Hoʻohui a me nā noi maʻamau

ʻOiai ko lākou ʻokoʻa, ʻike pinepine ʻia ʻo COD a me BOD a hana koʻikoʻi i ka loiloi maikaʻi o ka wai a me ka mālama ʻana i ka wai ʻino:

1) Ka loiloi i ka biodegradability:
Hoʻohana mau ʻia ka lakio BOD/COD e loiloi i ka hiki ke kūpono o nā ʻano lapaʻau olaola (e laʻa, ke kaʻina sludge hana).
· BOD/COD > 0.3: Hōʻike i ka biodegradability maikaʻi, e hōʻike ana he kūpono ka lāʻau olaola.
· BOD/COD < 0.3: Hōʻike i ka hapa nui o ka mea ola kino refractory a me ka biodegradability maikaʻi ʻole. Ma ia mau hihia, pono paha ke ʻano o ka hoʻomaʻamaʻa mua ʻana (e laʻa, ka hoʻomaʻamaʻa kiʻekiʻe a i ʻole ka coagulation sedimentation) no ka hoʻomaikaʻi ʻana i ka biodegradability, a i ʻole nā ​​ala lapaʻau kino-kemika ʻē aʻe.

2) Nā hiʻohiʻona noiʻi:
· BOD: Hoʻohana mua ʻia no ka loiloi ʻana i ka hopena kaiaola o ka hoʻokuʻu ʻia ʻana o ka wai ma luna o nā kino wai maoli, ʻoi loa ma ke ʻano o ka pau ʻana o ka oxygen a me kona hiki ke hoʻomake i ke ola wai.
· COD: Hoʻohana nui ʻia no ka mākaʻikaʻi wikiwiki ʻana i nā ukana haumia wai ʻino o ka ʻoihana, ʻoi aku ka nui inā loaʻa i ka wai ʻino nā mea ʻona a i ʻole biodegradable. Ma muli o kona hiki ke ana wikiwiki, hoʻohana pinepine ʻia ʻo COD no ka nānā ʻana i ka manawa maoli a me ke kaʻina hana i nā ʻōnaehana mālama wai.

Hōʻuluʻulu manaʻo o nā ʻokoʻa kumu