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Method of promoting activation and regeneration of sewage treatment biological film

A technology of sewage treatment and biofilm, applied in the direction of biological water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of complex operation, high cost, large power consumption, etc., and achieve wide application Foreground, stable performance, and the effect of improving efficiency

Active Publication Date: 2019-01-04
HUATIAN ENG & TECH CORP MCC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the actual operation of the biofilm process, long-term continuous treatment will form a 50cm thick slime on the surface of the filler, and even firmly adhere to the surface of the filler in the form of microcrystals and not easy to fall off, making the biofilm unable to naturally metabolize the old and bring forth the new , the reactor processing efficiency decreases
[0004] Chinese patent CN106315847A discloses a method for biofilm activation and renewal of fixed fillers and sludge suspension, which mainly uses periodic start and stop of fans and ensures sufficient air disturbance intensity to achieve hydraulic disturbance flushing to renew the aging biofilm. Although the operation is simple, it will have higher energy consumption
Chinese patent CN105600921A also uses strong aeration to renew and activate the aging biofilm on the filler in the membrane bioreactor, which also produces high energy consumption in the application
However, the in-situ activators are mainly biological enzymes and metal ions, which have the characteristics of strong specificity and easy inactivation
The above-mentioned biofilm activation method has the disadvantages of high power consumption, high cost, complicated operation, and the activator is easily inactivated.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) In the SBR reactor with suspended packing, when the biofilm ages and a large amount of "slime" appears, direct microscopy shows that the thickness of the biofilm is above 0.3cm, stop water intake, and stop supplying oxygen to the reactor ;

[0022] (2) Dissolve 2,4-dinitrophenol (DNP) in ethanol or acetone solution to make a 20mg / mL solution;

[0023] (3) in reactor, add (2) in 2,4-dinitrophenol (DNP) solution, make 2,4-dinitrophenol (DNP) initial concentration in reactor be 15mg / L;

[0024] (4) The system is intermittently aerated for 1-30 minutes, and the aeration intensity is 3-8m 3 Air / (m 2 Pool bottom plane area*h);

[0025] (5) Stop the aeration, add sodium dodecylsulfonate in the reactor, so that its concentration in the reactor is 0.5%;

[0026] (6) The continuous aeration of the system is not less than 10 minutes, and the aeration intensity is 5-10m 3 Air / (m 2 Pool bottom plane area*h);

[0027] (7) Stop the aeration, add flocculant in the reactor, p...

Embodiment 2

[0032] (1) In the biofilm / activated sludge combined process (IFAS) reactor with fixed filler, when the biofilm ages and a large amount of "slime" appears, direct microscopy shows that the thickness of the biofilm is above 0.2cm , stop water intake, stop supplying oxygen to the reactor;

[0033] (2) The reactor was statically settled for more than 2 hours, and the suspended sludge settled in the system was emptied;

[0034] (3) 3,3',4',5-tetrachlorosalicylanilide (TCS) was dissolved in ethanol or acetone solution to form a 10mg / mL solution;

[0035] (4) Add the 3,3',4',5-tetrachlorosalicylanilide (TCS) solution prepared in (3) into the reactor, and at the same time, the reactor is filled with water so that the fixed packing is on the liquid surface Down, 3,3',4', the initial concentration of 5-tetrachlorosalicylanilide (TCS) in the reactor is 5mg / L;

[0036] (5) The system is intermittently aerated for 1 to 30 minutes, and the aeration intensity is 3 to 8m 3 Air / (m 2 Pool b...

Embodiment 3

[0043] (1) In the submerged downflow aerated filter filled with biological ceramsite filter material, the filter material is biologically clogged, and the aging biofilm adheres to the surface of the quartz sand. When the water head loss of the filter is significantly reduced, stop the water intake and stop the aeration and oxygen supply to the reactor;

[0044] (2) Dissolve 2,4-dinitrophenol in ethanol or acetone solution to make a 20mg / mL solution;

[0045] (3) add 2,4-dinitrophenol solution in the reactor, be evenly distributed in the sand filter layer by the water distribution system, the concentration of 2,4-dinitrophenol in the reactor is 12mg / L;

[0046] (4) stand still more than 10min, add sodium dodecylsulfonate in the reactor, make its concentration in the reactor be 0.2%;

[0047] (5) Turn on the air-water backwashing system for short-term air washing for no more than 5 minutes, and the backwashing air intensity should not be less than 10L / (m 2 *s);

[0048] (6) Car...

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Abstract

The invention discloses a method of promoting activation and regeneration of a sewage treatment biological film. The method comprises the following steps: decoupling an aged biological film; eluting the decoupled aged biological film. An agent used in the method is stable in performance and cannot be deactivated, so that the energy consumption of the eluting process is reduced. The method disclosed by the invention can achieve a very good function of introducing a new biological film, improves the efficiency of treating sewage by the biological film, and has a wide application prospect.

Description

technical field [0001] The patent of the present invention relates to a method for removing the old and bringing forth the new, activating and regenerating biofilms for sewage treatment. Background technique [0002] The water treatment biofilm method is to set fillers in sewage treatment structures, and microorganisms gather and grow on the surface of the fillers to form biofilms. When the biofilm reaches a certain thickness and the transmission of substances diffusing into the biofilm is limited, it will be anoxic or even anaerobic. biofilm detachment. The biofilm method has strong adaptability to changes in water quality and water quantity, less excess sludge output, strong impact load resistance, no sludge bulking, easy maintenance and operation, energy saving, and low power costs. In order to speed up the water quality of sensitive areas and built-up areas to reach the Class IV standard of the surface, biofilm technology has been widely used in the upgrading and transf...

Claims

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Application Information

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IPC IPC(8): C02F3/34
CPCC02F3/34C02F2305/04
Inventor 赵丹鞠兴华白扬刘训东程寒飞杨磊
Owner HUATIAN ENG & TECH CORP MCC