Biofilm culturing method for carrier packing in moving bed biofilm reactor

A technology of moving bed biofilm and film hanging method, which is applied in the field of sewage treatment, can solve the problems of weak biofilm firmness and easy falling off, and achieve the effects of enhancing sewage treatment capacity, easy operation, and increasing quantity

Inactive Publication Date: 2016-05-11
NANJING UNIV OF TECH
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AI Technical Summary

Problems solved by technology

[0005] At present, the methods of biofilm formation mainly include "suffocating exposure method", "circulation method", "natural film formation method", "rapid film formation method", etc. The biofilm cultivated by the first two methods is not strong and easy to fall off. The time in the middle is longer

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0027] In this embodiment, a MBBR tank with a volume of 1 cubic meter is used to treat high-concentration separation wastewater, and the carrier filler adopts a diameter of 23mm, a height of 10mm, and a specific surface area of ​​500m 2 / m 3 , Cylindrical polyethylene filler, the filler filling rate is 50% v / v. The test environment is normal temperature, the original pH of the separation wastewater is 6.5-8.0, and DO>2.0mg / L is controlled. Its COD content is 3000mg / L-4000mg / L, TN content is 50mg / L-100mg / L, and TP content is 40mg / L-60mg / L.

[0028] Add a certain amount of activated sludge to the MBBR tank (activated sludge obtained by treating the separated wastewater with the activated sludge method and then separated by precipitation), so that the sludge concentration MLSS in the reaction tank is about 3000mg / L, and add high-concentration The wastewater is separated, and the MBBR tank is aerated to make the carrier filler and water completely mixed.

[0029] After 1 day of...

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PUM

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Abstract

The invention discloses a biofilm culturing method for carrier packing in a moving bed biofilm reactor. The biofilm culturing method comprises the following steps: (1) adding activated sludge and ion exchange wastewater into the moving bed biofilm reactor containing the carrier packing, and then performing continuous aeration treatment for 1 to 2 days; (2) simultaneously performing water drainage and ion exchange wastewater supplement on the moving bed biofilm reactor, performing dynamic culture, and enabling the activated sludge to flow back; keeping pH (potential of hydrogen) in a reaction tank to be 7.0 to 7.5, and keeping an aeration state while the dynamic culture is performed until biofilm culturing is finished. The biofilm culturing method disclosed by the invention is fast in biofilm culturing, simple, and easy to operate; moreover, the biofilm culturing method has a good treatment effect, is capable of shortening domestication time, has wide practicability, and is a suspended packing biofilm culturing method suitable for high-concentration ion exchange wastewater.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, in particular to a film-hanging method based on suspended fillers in a moving-bed biofilm reactor treatment system in high-concentration separation wastewater. Background technique [0002] With the continuous development of sewage biological treatment technology, biofilm method has been widely used, among which "moving bed biofilm reactor (MBBR)" is the most widely used and most efficient treatment technology in biofilm technology. There are hundreds of successful application examples in the municipal and industrial fields. [0003] MBBR is developed from biological fluidized bed and submerged biological filter, and combines the common advantages of traditional live sludge method and biofilm method. Its principle is to add a certain proportion of carrier fillers close to the density of water in the aeration tank, and make the carrier fillers circulate in the aeration tank under water f...

Claims

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Application Information

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IPC IPC(8): C02F3/08C02F3/12
CPCC02F3/085C02F3/1236Y02W10/10
Inventor 应汉杰陈勇刘桂文牛欢青朱晨杰柳东吴菁岚庄伟
Owner NANJING UNIV OF TECH
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