Technical introduction
Constructed Rapid Deep Filtering System (CRI system) is an in-depth improvement and optimization of the percolation land treatment system, which inherits the advantages of the rapid percolation land treatment system, and at the same time overcomes its shortcomings. It can be used for centralized treatment of urban sewage, scattered urban sewage, and can also be used for water treatment and advanced treatment of polluted river water.
The rapid diafiltration system belongs to the biofilm method in sewage treatment, and during normal operation, biofilm grows on the surface of artificial fast diafiltration media. Abundant biofilm grows on the surface of the filter media, and when the sewage flows into the leachate material, the biofilm formed by the high specific surface area of the filter media is used to biodegrade the organic pollutants.
Process advantages
◆ The investment in infrastructure is small, about 1,000 yuan per cubic meter of water (excluding land acquisition fees), which is about 1/2 of the investment of the conventional activated sludge method
◆ It occupies a moderate area, has a high hydraulic load (generally 1m2/d), has a large impact load resistance capacity, can effectively control the sludge expansion and the growth of filamentous microorganisms, and the system has high process stability
◆ No need for secondary sedimentation tank, simple process
◆ The treatment process does not require aeration and backwashing equipment
◆ There is no problem of disposal of residual sludge, except for a very small amount of sludge produced by the pretreatment primary sedimentation tank, no activated sludge is produced, which saves the facilities and costs of treating activated sludge and reduces its impact on the environment
◆ Artificial construction, flexible and flexible, not limited by site conditions, will not cause groundwater pollution due to seepage
◆ The operating cost is low, the direct operating cost of each square of water is about 0.2 yuan/m3, and the management is convenient, the operation is simple, and the maintenance is easy
