Aerobic synchronous nitrification and denitrification sewage treatment method based on BAF
A sewage treatment method and simultaneous nitrification technology, applied in aerobic process treatment, special compound water treatment, biological water/sewage treatment, etc., to achieve the effect of high COD utilization rate, low operation difficulty and high TN removal rate
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Embodiment 1
[0040] (1) Filler dosing stage: add 10L of clay ceramsite filler to the BAF reaction tank with an empty bed volume of 25L in the form of natural accumulation, purchased from Gongyi Pengcheng Filter Material Co., Ltd., its particle size is 5-8mm, and the gap The ratio is 48.41%, and the specific surface area is 0.54*10 4 cm 2 / g, the density is 1.03g / cm 3 , The effective volume of the reaction pool is 20L.
[0041] (2) Start-up phase:
[0042] S1. Autotrophic nitrification activity culture stage: the bacterial density is 4*10 7 The CFU / mL compound autotrophic nitrifying bacteria liquid is inoculated into the reaction tank at an dosage of 2% (V / V) of the effective volume of the reaction tank, and the order of water intake, aeration reaction, aeration stop, and drainage is followed by artificial water distribution. Intermittent operation to cultivate the autotrophic nitrification activity of the system and control the influent NH 4 + -N concentration is 200mg / L, NaHCO 3 Th...
Embodiment 2
[0048] (1) Filler dosing stage: to the empty bed volume 200m 3 Add 100m in the way of natural accumulation in the BAF reaction pool 3 Fly ash ceramsite filler, purchased from Zhejiang Zhongjin Environmental Protection Technology Co., Ltd.; model: ZJDN-PNO-0610, the particle size is 0.8-1mm, the porosity is 55.6%, and the specific surface area is 0.61*10 4 cm 2 / g, the density is 1.01g / cm 3 , the effective volume of the reaction pool is 150m 3 .
[0049] (2) Start-up phase
[0050] S1. Autotrophic nitrification activity culture stage: the bacterial density is 4*10 7 The CFU / mL compound autotrophic nitrifying bacteria liquid is inoculated into the reaction tank at an dosage of 2% (V / V) of the effective volume of the reaction tank, and the order of water intake, aeration reaction, aeration stop, and drainage is followed by artificial water distribution. Intermittent operation to cultivate the autotrophic nitrification activity of the system and control the influent NH 4 +...
example 1
[0056] A kind of sewage treatment method based on BAF aerobic synchronous nitrification and denitrification, comprises the following steps:
[0057](1) Filler dosing stage: add microbial filler into the BAF reaction tank; the microbial filler is ceramsite, the filling rate is 50%, and the ceramsite is fly ash ceramsite filler (Zhejiang Zhongjin Environmental Protection Technology Co., Ltd.; model: ZJDN-PNO-0610), the particle size is 0.8-1mm, the porosity is 55.6%, and the specific surface area is 0.61*10 4 cm 2 / g, the density is 1.01g / cm 3 .
[0058] (2) Start-up phase:
[0059] S1. Autotrophic nitrification activity cultivation stage: Inoculate the nitrifying bacteria agent into the reaction tank at the dosage of 2% (V / V) of the effective volume of the reaction tank. The nitrifying bacteria agent was purchased from Wuhan Water Country Environmental Protection Technology Co., Ltd., model number For BioPower 100PLUS, the bacterial density is 10 7 CFU / mL, control the NH i...
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