Kakaretso ea Nitrojene e Fetang Tekanyetso le Kameho ea Eona Mekhoeng ea Phekolo ea Likhoerekhoere

1. Ho Fokotsa Ts'ebetso ea Ts'ebetso

- Tšitiso ea Denitrification
Naetrojene e feteletseng hangata e tsamaisana le ts'ebetso e fokotsehileng ea denitrification. Maemo a phahameng a oksijene (DO) sebakeng sa anoxic (＞0.5 mg / L) a senya tikoloho ea anoxic, a thibela ts'ebetso ea libaktheria tse hanyetsang le ho thibela phetoho e atlehang ea naetrojene ea nitrate ho khase ea naetrojene. Ho phaella moo, karo-karolelano ea carbon-to-nitrogen e sa lekaneng (C/N＜4) e thibela tšebetso ea denitrification, e thibela ho tlosoa ka ho feletseng ha naetrojene.

- Nitrification e thibetsoeng
Ho bokellana ha ammonia naetrojene ho ka hatella tšebetso ea libaktheria tsa nitrifying, haholo-holo ha mahloriso a ammonia nitrogen a feto-fetoha kapa pH e kheloha moeling o loketseng (6.5-8.0), e fokotsang litekanyetso tsa nitrification haholo. Lithempereichara tse tlase (＜15℃) le tsona li fokotsa bokhoni ba nitrification le denitrification.

2. Sistimi ea Microbial e sa leka-lekaneng

- Thibelo ea Sechaba sa Libaktheria
Metsoako e phahameng ea ammonia e sa lefelloeng (FA ~ 60 mg / L) e thibela ka ho toba mosebetsi oa libaktheria tsa nitrifying (AOB le NOB), tse lebisang ho putlama ha tsamaiso. Ho feta moo, mehloli ea khabone e sa lekaneng e ka etsa hore libaktheria tsa heterotrophic li ata ka mokhoa o fetelletseng, ho fokotsa sebaka sa ho hlakisa libaktheria.

- Ketsahalo e sa tloaelehang ea Sludge
Lilemo tse khutšoane tsa seretse (SRT) kapa tšenyo e feteletseng ea seretse e thibela libaktheria tsa nitrifying ho qeta nako ea tsona ea ho ikatisa. Ho kenya seretse se phahameng (＞0.15 kgBOD/kgMLSS·d) ho ka baka bongata bo senang mahlahahlaha, ho fokotsa ho lula ha seretse.

3. Mekhahlelo e sa Laoleheng ea Ts'ebetso

- Likhakanyo tse sa sebetseng hantle tsa Recirculation
Karo-karolelano e sa lekaneng ea ho tsosolosa ka hare (＜300%) e thibela ho khutla ho lekaneng ha naetrojene ea nitrate sebakeng sa anoxic, e amang katleho ea denitrification. Karo-karolelano e feteletseng ea ho potoloha ka ntle (＞50%) e ka hlahisa oksijene e qhibilihisitsoeng sebakeng sa anoxic, e senya maemo a denitrification.

- DO le pH Fluctuation
Oksijene e sa lekaneng e qhibilihisitsoeng (DO-2 mg / L) ka tanka ea aeration e fokotsa nitrification, ha DO e feteletseng e sitisa anoxic zone denitrification. Ho kheloha ho pH ho tloha boemong bo nepahetseng (7.2-8.0 bakeng sa nitrification, 6.5-8.0 bakeng sa denitrification) ho thibela mosebetsi oa bohlokoa oa enzyme.

4. Boleng ba Moroallo le Likotsi tsa Tikoloho

- Eutrophication e mpefalang
Kakaretso ea naetrojene e feteletseng ka har'a metsi a litšila (＞1.0 mg/L) e baka ka kotloloho eutrophication ea metsi, e lebisang ho lithunthung tsa algal, ho fokotseha ha oksijene, le ho putlama ha ketane ea tikoloho.

- Pokello ea Lintho Tse Chefo
Nitrate e feteletseng le nitrite li ka 'na tsa bokellana ka ketane ea lijo, tsa beha likotsi tsa bophelo bo botle (mohlala, likotsi tsa kankere).

1. Ntlafatso ea Ts'ebetso

- Ho eketsa mehloli ea carbon (mohlala, sodium acetate) ho fetola C / N ho 4-6.

- Laola karo-karolelano ea ka hare (300-500%) le karo-karolelano ea ka ntle (30-50%).

- Kenya litanka tsa pre-denitrification kapa lits'ebetso tsa MBR ho holisa lilemo tsa seretse.

2. Parameter Regulation

- Boloka sebaka sa anoxic DO＜0.5 mg/L le sebaka sa aerobic DO=2-4 mg/L.

- Eketsa alkalinity (mohlala, sodium carbonate) ho tsitsisa pH ho 7.0-8.0.

3. Mehato ea Tšohanyetso

- Eketsa li-antitifying agents tsa baktheria ho potlakisa ho hlaphoheloa ha sistimi.

- Sebelisa mekhoa ea lik'hemik'hale (mohlala, breakpoint chlorination) bakeng sa phokotso e potlakileng ea naetrojene ka nako e khuts'oane.