Fixed plate biofilm carrier

                             Before use                                               Carry biofilm                                    After long-term use  

Fixed plate biofilm carrier is developed by Tongji University for biological wastewater treatment plant. It is a new generation microbial immobilized carrier based on years of engineering practise. This filling material has been widely applied in the treatment of refractory organic wastewater. It has special structure shaped by a series of complex processes with bilayer films and interstice layer, so it possesses large specific surface area and high porosity properties. After ionized and hydrophilic modification during the shaping processes, the material surface is positively charged, so it is easier for negatively charged microorganisms to attach. Fixed plate biofilm carrier has excellent mechanical strength which ensures no damage under the hydraulic shear or during collision process between two packing material, Besides, this high polymer material can resist acid or alkali with more than 8-10 years lifespan.

Features and advantages of fixed plate biofilm carrier

Features

• Having excellent mechanical strength and long lifespan. Modified polymer material has high mechanical strength and can resist acid or alkali with more than 8-10 years lifespan.

• Having high porosity and sludge concentration. With the complex processing, the packing material has high porosity and large specific surface area. As it is easier attached for microorganisms, the sludge concentration in filling area can reach 10g/L.

• Strong affinity for microorganisms and quickly biofilm formation. After ionized and hydrophilic modification, it is easy to hang biofilm. The inside sustainably-releasing enzyme can reduce the generation time of some special bacterial.
• The biofilm is updated fast which prevents material agglomeration so that wastewater can contact with biofilm sufficiently.

Advantages

1. Wide range of application

Fixed plate biofilm carrier as natural water treatment can be applied in anaerobic, aerobic or aerated separation reactors. In aerobic reactors, the filling material can improve the hydraulic condition, increase microorganism concentration and achieve simultaneous nitrification-denitrification so as to enhance biochemical effect with less excess sludge production. 

In anaerobic or aerated separation units, the tilt filling material can largely increase separation area and settling efficiency, decrease the hydraulic loading.

Fixed plate biofilm carrier can be used in the upgrading reconstruction or expansion programs of new plants or old wastewater treating plants. It helps improve processing efficiency by increasing the biomass concentration. To the existed MBR, filling material can reduce the membranes loading rate by attaching partial microorganism on itself so the membrane cleaning frequency can be reduced and the life of membrane is extended.

When grows to a certain thickness, the biofilm in filling material will peel off to the bottom of the tank. These biofilm forms activated sludge. As a result, the treating ability of the reactor is improved markedly owing to the combination of biofilm and activated sludge processes. This technology is especially applicable to the wastewater treatment of petrochemical industry (including coal chemical industry) and pharmaceuticals industry.

2. Low cost

Low construction cost as it saves 30% tank volume under same treating capacity and efficiency. Low operation cost because of no maintenance required. Besides, it is easy to exchange the filling material with no need to turn off the influent. The wastewater treatment system has little effect on the whole plant's operation.

 Design parameters of fixed plate biofilm carrier

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