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In-situ activating agent and method of biological aerated filter filling biological membrane

A technology of biological aerated filter and activation method, which is applied in the field of in-situ activator and in-situ activation of biological film of biological aerated filter, can solve the problems of inconvenient operation and management, low efficiency of aging biofilm, etc., and achieve good Application prospects, beneficial to regeneration, and the effect of small system disturbance

Active Publication Date: 2016-07-13
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the current situation that the conventional backwashing of the existing biological aerated filter removes the aging biofilm on the surface of the filter material, the efficiency is low and the operation and management are inconvenient, the present invention provides an in-situ activator and an in-situ Activation method, the in-situ activator components in the present invention are protease, amylase and metal ions, which can realize the crushing and decomposition of the EPS constituting the biofilm and the removal of the aging biofilm; For the problem that the lower half of the tank cannot be discharged, add a backwash step to effectively remove most of the residual biofilm in the aerated filter tank

Method used

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Examples

Experimental program
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Embodiment 1

[0033] The in-situ activation method of biological aerated filter filler biofilm in this embodiment is for in-situ activation of aged biofilm in a biological aerated filter for treating urban domestic sewage, and the filler in the filter is quartz sand. The influent water quality of the aeration filter is: COD400-600mg / L, BOD 5 150-250mg / L, NH 3 -N40-60mg / L, TN80-100mg / L, TP10-12.5mg / L; the operating parameters are: the air-water ratio is 10:1, the aeration intensity is 1L / min, and the hydraulic retention time is 12h; The specific steps of in situ activation are:

[0034] Step 1, prepare protease mass concentration to be 600mg / L, amylase mass concentration to be 400mg / L, MgCl 2 Biofilm in-situ activator with a concentration of 125mmol / L;

[0035] Step 2. While maintaining the operation of the biological aerated filter, add a biofilm in-situ activator with a total mass concentration of 1000 mg / L every 24 hours for 12 consecutive days;

[0036] Step 3: Stop the operation of ...

Embodiment 2

[0039] The method for in-situ activation of biological aerated filter filler biofilm in this embodiment is to perform in-situ activation of aged biofilm in a biological aerated filter for advanced treatment of fermentation wastewater. The filler in the filter is ceramsite, and the influent water quality is: COD350-500mg / L, BOD 5 120-200mg / L, NH 3 -N20-40mg / L, TN60-80mg / L, TP5.3-8.9mg / L; operating parameters are: air-water ratio 10:1, aeration intensity 0.8L / min, hydraulic retention time 12h. The specific steps of in situ activation of aging biofilm are as follows:

[0040] Step 1, prepare protease mass concentration as 600mg / L, amylase mass concentration as 400mg / L, MnSO 4 In-situ activator with a concentration of 50mmol / L;

[0041] Step 2. While maintaining the operation of the biological aerated filter, add a biofilm in-situ activator with a total mass concentration of 1000 mg / L every 36 hours, and treat continuously for 10 days;

[0042] Step 3: Stop the biological aerate...

Embodiment 3

[0045] The in-situ activation method of biofilm filler in biological aerated filter according to the present embodiment is to perform in-situ activation of aged biofilm in biological aerated filter for advanced treatment of livestock and poultry breeding wastewater, and the filler in the filter is zeolite. Influent water quality: COD460-620mg / L, BOD 5 140-190mg / L, NH 3 -N45-65mg / L, TN85-125mg / L, TP7.7-13.1mg / L. The operating parameters are: the air-water ratio is 10:1, the aeration intensity is 1L / min, and the hydraulic retention time is 24h. The specific steps of in situ activation of aging biofilm are as follows:

[0046] Step 1, prepare protease mass concentration to be 400mg / L, amylase mass concentration to be 100mg / L, CaCl 2 In-situ activator with a concentration of 50mmol / L;

[0047] Step 2. While maintaining the operation of the biological aerated filter, add a biofilm in-situ activator with a total mass concentration of 500 mg / L every 12 hours, and treat continuous...

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Abstract

The invention discloses an in-situ activating agent and method of a biological aerated filter filling biological membrane and belongs to the technical field of biological membrane process sewage treatment.The method comprises the steps: first, preparing a biological membrane in-situ activating agent; second, adding the biological membrane activating agent while the biological aerated filter is kept running, and treating continuously for 7-12 days; third, stopping the biological aerated filter, stopping adding the in-situ activating agent, and starting a backwash water pump for backwashing; fourth, after in-situ activation, restating the biological aerated filter.The biological membrane in-situ activating agent is made by composting proteinase, amylase and metal ions and can composite and form EPS of biological membrane structure, breakage and dispersion of the aged biological membrane are facilitated, backwash efficiency is improved, the problem in in-situ renewal and activation of the aged biological membrane of the biological aerated filter is solved effectively, and the in-situ activating agent and method are simple to perform and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of biofilm sewage treatment, and more specifically relates to an in-situ activator and an in-situ activation method for biological aerated filter filler biofilm. Background technique [0002] The biological aerated filter is a kind of biofilm method. The granular filler (such as quartz sand, anthracite, ceramsite, synthetic plastic, volcanic ash, etc.) in the filter is used as the carrier to aerate inside the filter to make the surface of the filter material form biofilms. The basic principle of the biological aerated filter is to use granular fillers and the attached biofilm as the main treatment medium on the basis of first-level strengthening, and give full play to the biological metabolism, physical filtration, and physical adsorption of biofilms and fillers. The effect and the graded predation of the food chain in the reactor can realize the removal of pollutants in the same unit reactor. Biological a...

Claims

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Application Information

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IPC IPC(8): C02F3/02
CPCC02F3/02Y02W10/10
Inventor 任洪强俞启升黄辉丁丽丽耿金菊
Owner NANJING UNIV
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