K3 MBBR Wastewater Filter Media For Industrial Water Purification

Product Description

The basic design idea of MBBR is to be able to operate continuously without blocking and backwashing, with small head loss and large specific surface area. This can be achieved by the biofilm growing on a smaller carrier unit, and the carrier moving freely with the flow of water in the reactor. In aerobic reactor, the carrier is moved by aeration; in anoxic / anaerobic reactor, the carrier is moved by mechanical agitation. In order to prevent the loss of filler in the reactor, a porous filter screen can be set at the outlet of the reactor. MBBR is generally rectangular or cylindrical structure. The rectangular reactor can be divided into several or no grids uniformly along the length of the tank with baffles. Generally speaking, the flow in the reactor is push flow, and in each cell, due to aeration fluidization, the flow is completely mixed. The specific gravity of the tank is close to that of water, polyethylene or polypropylene suspended filler with large specific surface area. The attached surface of biofilm in the reactor can reach 500m2 / m3, and the actual specific surface area (inner surface of filler) can reach 350m2 / m3. The perforated aeration pipe is aerated on one side to make the packing circulate in the tank. The bottom of the cylindrical reactor is provided with a microporous aeration head. In addition, some reactors are equipped with not only aeration device but also agitation device. These agitation devices can make the reactor easily and flexibly used in the anoxic state.

Technology Parameter

Principle of process

The principle of MBBR Process is to increase the biomass and species in the reactor by adding a certain number of suspended carriers to the reactor, so as to improve the treatment efficiency of the reactor. Because the density of packing is close to that of water, it is completely mixed with water during aeration, and the environment for microorganism growth is gas, liquid and solid. The collision and shear of the carrier in water make the air bubble smaller and increase the utilization of oxygen. In addition, there are different kinds of organisms inside and outside each carrier, some anaerobic or facultative bacteria grow inside, and the outside is aerobic bacteria, so each carrier is a micro reactor, which makes nitrification and denitrification exist at the same time, thus improving the treatment effect.

MBBR Process has the advantages of both traditional fluidized bed and biological contact oxidation process. It is a new and efficient sewage treatment method. The carrier is in the fluidization state by the enhancement of aeration and water flow in the aeration tank, Then the suspended activated sludge and attached biofilm are formed, which makes the moving bed biofilm use the whole reactor space and give full play to the advantages of attached phase and suspended phase, so as to enhance their advantages and avoid their disadvantages and complement each other. Different from the previous packing, the suspended packing can contact with sewage frequently and many times, so it is called "moving biofilm".

Advantages

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

(1) Filler characteristics

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

(2) Good denitrification capacity

The nitrification and denitrification can take place in a single 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 higher, which is 5-10 times higher than that of the conventional activated sludge process, and can be as high as 30-40g / L. The treatment efficiency of organic compounds is improved, and the impact load resistance is strong at the same time.

(4) Easy to maintain and manage

There is no need to install packing bracket in the aeration tank. It is convenient to maintain the packing and the aeration device at the bottom of the tank. At the same time, it can save investment and floor space.