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

Pending Publication Date: 2022-04-15
江苏宜裕环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Compared with MBBR system and activated sludge system, the synchronous nitrification and denitrification activity of the existing BAF system needs to be further improved

Method used

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  • Aerobic synchronous nitrification and denitrification sewage treatment method based on BAF
  • Aerobic synchronous nitrification and denitrification sewage treatment method based on BAF
  • Aerobic synchronous nitrification and denitrification sewage treatment method based on BAF

Examples

Experimental program
Comparison scheme
Effect test

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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Abstract

The invention provides an aerobic synchronous nitrification and denitrification sewage treatment method based on a BAF (Biological Aerated Filter). The synchronous nitrification and denitrification activity of a BAF system can be improved. A BAF-based aerobic synchronous nitrification and denitrification sewage treatment method comprises a starting stage, and is characterized in that the starting stage comprises the following steps: S1, an autotrophic nitrification activity culture stage: inoculating 2% of a nitrifying bacteria agent into a reaction tank, controlling the ammonia nitrogen concentration of the inlet water of the reaction tank to be 200mg / L, the NaHCO3 concentration to be 2200mg / L, the KH2PO4 concentration to be 174mg / L, the operating conditions and the dissolved oxygen to be 2-4mg / L, and the pH value to be 7-8; the temperature is 20-30 DEG C, and aeration operation is carried out; and S2, aerobic synchronous nitrification and denitrification active culture stage: inoculating 0.5% of denitrifying bacteria into the reaction tank, controlling the reaction tank to continuously feed and discharge water, controlling the NH4 < + >-N concentration of the fed water to be 100-300mg / L, COD: NH4 < + >-N: P = 10: 1: 0.1, and operating conditions, the dissolved oxygen to be 2-6mg / L, the pH to be 7.5-8, the temperature to be 20-30 DEG C and the HRT to be 24h.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a BAF-based aerobic synchronous nitrification and denitrification sewage treatment method. Background technique [0002] Biological aerated filter (BAF) is a special form of biological contact oxidation method. A certain amount of filter material with large specific surface area and rough and porous surface is filled in the reactor to provide a space carrier for microorganisms to inhabit and grow. Acclimatization causes the formation of biofilms with different functions on the surface of the filter material and in the voids. When the sewage flows through, use the high concentration of active microorganisms in the biofilm to oxidize and decompose and the characteristics of the small particle size of the filter material to give full play to the biological metabolism of microorganisms, bioflocculation, physical adsorption and retention and reaction of the biofilm and filter...

Claims

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Application Information

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IPC IPC(8): C02F3/06C02F3/30C02F101/10C02F101/16C02F101/30
CPCC02F3/06C02F3/302C02F2209/08C02F2209/14C02F2209/02C02F2209/18C02F2209/22C02F2209/16C02F2209/06C02F2209/44C02F2305/06C02F2303/14C02F2101/16C02F2101/105C02F2101/30Y02W10/10
Inventor 李志涛羊建东韦丽敏倪明徐金良
Owner 江苏宜裕环保科技有限公司
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