Environmental protection effective membrane fast MBBR sewage treatment filler

The principle of MBBR

MBBR process principle is the basic principle of biofilm method, by adding a certain amount of suspension carrier to the reactor, improve the biomass and biological species in the reactor, so as to improve the treatment efficiency of the reactor.  Since the density of the filler is close to that of water, it is completely mixed with water during aeration, and the environment for microbial growth is gas, liquid and solid three-phase.

The collision and shear of the carrier in the water make the air bubbles smaller and increase the utilization rate of oxygen.  In addition, there are different biological species inside and outside each carrier. Some anaerobic bacteria or facultative aerobic bacteria grow inside the carrier and aerobic bacteria grow outside. In this way, each carrier is a micro-reactor, so that nitrification reaction and denitrification reaction exist at the same time, so as to improve the treatment effect.

The characteristics of MBBR

MBBR process combines traditional fluidized bed and the advantages of both biological contact oxidation method is a new efficient wastewater treatment method, relying on the aeration pool of raise the aeration and water carrier in the fluidization state, of activated sludge and suspended growth and attached growth of biofilm, it is make use the moving bed biofilm reactor space,  Give full play to the advantages of the attached phase and the suspended phase organisms, so that their strengths and weaknesses, complement each other.  Different from previous fillers, suspended fillers are called "mobile biofilm" because they can frequently contact with sewage.

The advantages of MBBR

Compared with activated sludge method and fixed packing biofilm method, MBBR not only has the high efficiency and operational flexibility of activated sludge method, but also has the characteristics of traditional biofilm method, such as resistance to impact load, long sludge age and less residual sludge.

1) Packing characteristics  

Fillers are mostly made of polyethylene, polypropylene and its modified materials, polyurethane foam and so on. The specific gravity is close to water. It is mainly cylindrical and spherical, easy to hang the film, no agglomeration, no blockage, easy to remove the film.  

(2) Good nitrogen removal ability  

A good trophic, anoxic and anaerobic environment is formed on the filler. Nitrification and denitrification can occur in one reactor, which has a good effect on the removal of ammonia nitrogen.  

(3) Good removal effect of organic matter  

The sludge concentration in the reactor is relatively high, and the general sludge concentration is 5 ~ 10 times of the ordinary activated sludge method, which can be as high as 30 ~ 40g/L.  The treatment efficiency of organic matter is improved, and the impact load resistance is strong.  

(4) Easy to maintain and manage  

There is no need to set up filler bracket in the aeration tank. It is convenient to maintain the filler and the aeration device at the bottom of the tank. At the same time, it can save investment and cover area.