MBBR process principle is the basic principle of biofilm method, which makes full use of the advantages of activated sludge method and overcomes the disadvantages of traditional activated sludge method and fixed biofilm method.

Introduction

By adding a certain amount of suspended carrier to the reactor, MBBR can improve the biomass and biological species in the reactor, so as to improve the treatment efficiency of the reactor. Because the density of filler is close to water, when aeration, it is mixed with water completely. The environment for microorganism growth is gas, liquid and solid. The collision and shear action of the carrier in the water make the air bubbles smaller and increase the utilization rate of oxygen. In addition, each carrier has different biological species inside and outside. Some anaerobic bacteria or facultative bacteria grow inside, and the outside is aerobic bacteria. In this way, each carrier is a micro-reactor, which enables nitrification reaction and denitrification reaction to exist simultaneously, thus improving the treatment effect.

Main characteristics

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 adhesion and suspended phase biological superiority of the two, foster strengths and circumvent weaknesses, complement each other. Unlike previous fillers, suspended fillers are known as "moving biofilms" because of their frequent and repeated contact with sewage.

The key of MBBR technology lies in the research and development of biological filler with specific gravity close to water and easy to move freely with water under slight agitation. It has the characteristics of large effective specific surface area and is suitable for the adsorption and growth of microorganisms. It has strong applicability and wide application range. It can be used not only in the new sewage treatment plant, but also in the process transformation and upgrading of the existing sewage treatment plant.