Nayitrojeni Wokwanira Woposa Mulingo Ndi Mphamvu Zake pa Njira Zoyeretsera Zonyansa

1. Kuchepetsa Kuchita Mwachangu

- Kusokoneza Denitrification
Kuchuluka kwa nayitrogeni nthawi zambiri kumayendera limodzi ndi kuchepa kwa denitrification. Miyezo yambiri yosungunuka ya okosijeni (DO) m'dera la anoxic (＞0.5 mg / L) imasokoneza chilengedwe cha anoxic, kulepheretsa ntchito ya mabakiteriya otsutsa ndikuletsa kutembenuka kwa nitrate kukhala mpweya wa nayitrogeni. Kuonjezera apo, chiŵerengero cha carbon-to-nitrogen chosakwanira (C/N＜4) chimalepheretsa kuchotsedwa kwa nayitrogeni, kulepheretsa kuchotsedwa kwathunthu kwa nayitrogeni.

- Kuchepetsa Nitrification
Kuchuluka kwa nayitrogeni wa ammonia kumatha kupondereza ntchito ya mabakiteriya omwe amayambitsa nitrifying, makamaka pamene ndende ya ammonia nitrogen imasintha kapena pH imapatuka pamtundu woyenera (6.5-8.0), ndikuchepetsa kwambiri kuchuluka kwa nitrification. Kutentha kochepa (＜15 ℃) kumachepetsanso zonse za nitrification ndi denitrification.

2. Imbalanced Microbial System

- Kuletsa Madera a Bakiteriya
Kuchuluka kwa ammonia waulere (FA＞60 mg/L) kumalepheretsa mwachindunji ntchito ya mabakiteriya a nitrifying (AOB ndi NOB), zomwe zimapangitsa kugwa kwadongosolo. Kuphatikiza apo, magwero osakwanira a kaboni angayambitse mabakiteriya a heterotrophic kuchulukirachulukira, kuchepetsa malo oletsa mabakiteriya.

- Zochita Zachilendo za Sludge
Zaka zazifupi za sludge (SRT) kapena kuwononga matope kwambiri kumalepheretsa mabakiteriya opatsa nitrify kuti amalize kubereka kwawo. Kudzaza matope ambiri (＞0.15 kgBOD/kgMLSS·d) kungayambitse kuchulukira kosasunthika, kumachepetsa kukhazikika kwamatope.

3. Ma Parameter Ogwira Ntchito Osayendetsedwa

- Kusagwira ntchito kwa Recirculation Ratio
Kusakwanira kwa recirculation yamkati (＜300%) kumalepheretsa kubweza kokwanira kwa nayitrogeni wa nitrate ku zone ya anoxic, zomwe zimakhudza denitrification bwino. Kuchuluka kwa recirculation zakunja (＞50%) kumatha kuyambitsa okosijeni wosungunuka m'dera la anoxic, kusokoneza mikhalidwe ya denitrification.

- DO ndi pH Kusinthasintha
Mpweya wosakwanira wosungunuka (DO-2 mg / L) mu thanki ya aeration umalepheretsa nitrification, pamene DO yochuluka imasokoneza denitrification ya anoxic zone. Kupatuka kwa pH kuchokera pamlingo woyenera (7.2-8.0 ya nitrification, 6.5-8.0 ya denitrification) kumalepheretsa ntchito yayikulu ya enzyme.

4. Ubwino Wamadzi Ndi Zowopsa Zachilengedwe

- Kuwonongeka kwa Eutrophication
Nayitrogeni wochuluka wochuluka m'madzi otayira (＞1.0 mg/L) amayambitsa kufalikira kwa madzi, zomwe zimapangitsa kuti algal blooms, kusungunuka kwa okosijeni, ndi kuwonongeka kwa chilengedwe.

- Kudzikundikira Zinthu Zapoizoni
Kuchuluka kwa nitrate ndi nitrite kumatha kuwunjikana kudzera muzakudya, kuyika zoopsa paumoyo (mwachitsanzo, zoopsa za carcinogenic).

1. Kukhathamiritsa kwa Njira

- Onjezani magwero a kaboni (mwachitsanzo, sodium acetate) kuti musinthe C/N kukhala 4-6.

- Control mkati recirculation chiŵerengero (300-500%) ndi kunja recirculation chiŵerengero (30-50%).

- Ikani matanki a pre-denitrification kapena njira za MBR kuti muwonjezere zaka zamatope.

2. Parameter Regulation

- Sungani zone ya anoxic DO＜0.5 mg/L ndi aerobic zone DO=2-4 mg/L.

- Onjezani alkalinity (mwachitsanzo, sodium carbonate) kuti mukhazikike pH pa 7.0-8.0.

3. Njira Zadzidzidzi

- Onjezani mabakiteriya otsutsa kuti muchepetse kuchira.

- Gwiritsani ntchito njira za mankhwala (mwachitsanzo, breakpoint chlorination) kuti muchepetse nayitrogeni mwachangu pakanthawi kochepa.