Before entering the area, PAC and PAM are added to the wastewater through a dosing pump, and then it enters the air flotation zone where fine suspended solids are effectively removed. Most of the LAS generated from detergent and laundry wastewater is also removed, which is beneficial for the biochemical treatment of the back-end.
The wastewater flows into the baffle anaerobic reaction filter by itself. Several vertical guide plates are installed in the tank and packing materials are installed indoors to divide the reactor into several reaction chambers connected in series. Each reaction chamber can be regarded as a relatively independent upstream sludge bed (UASB), which is guided by the guide plate to flow up and down and pass through the anaerobic sludge layer in the reaction chamber one by one. The organic matrix in the wastewater is removed by sufficient contact with microorganisms. With the help of the flow of wastewater and the rise of biogas, the sludge in the reaction chamber moves up and down. However, due to the obstruction of the guide plate and the settling performance of the sludge, the flow velocity of the sludge in the horizontal direction is slow, resulting in a large amount of anaerobic sludge being trapped in the reaction chamber. ABR can be viewed as a simple series connection of multiple UASBs in construction, and in terms of process, ABR is closer to a push flow process.
One of the essence of biological contact oxidation treatment technology is to fill the tank with fillers. The already oxygenated sewage submerges all the fillers and flows through them at a certain flow rate. Covering the packing with biofilm, sewage comes into extensive contact with the biofilm. Under the metabolic function of microorganisms on the biofilm, organic pollutants in the sewage are removed and purified. Biological contact oxidation is a biological treatment technology that falls between activated sludge process and biofilter. The biofilm process, which has the characteristics of activated sludge process and combines the advantages of both, is widely used in the field of sewage treatment engineering.

The sewage lifting pump is lifted to the acidification and hydrolysis treatment unit. Under the action of hydrolysis bacteria, insoluble organic matter is hydrolyzed into soluble substances. With the synergistic effect of acid producing bacteria, large molecule substances and difficult to degrade substances are converted into small molecule substances that are easy to biodegrade, improving the biodegradability of sewage. When the pH of the influent is neutral or slightly alkaline, the pH of the effluent can be stabilized at a neutral state. At the same time, apart from the lifting and reflux of sewage, there is basically no other power consumption, so it is only about 1/5~1/10 of the aerobic treatment power consumption, which enables sewage to be treated in the subsequent aerobic tank with less energy consumption and shorter residence time, thereby improving the treatment efficiency of sewage and reducing the amount of sludge generated. The effluent from the hydrolysis acidification treatment unit flows into the biological contact oxidation treatment unit, where most of the organic matter is removed under the action of aerobic microorganisms. The effluent from the biological contact oxidation treatment unit flows into the secondary sedimentation tank, and the sewage is separated into sludge and water by gravity. The supernatant overflows into the intermediate water tank and is lifted by a secondary lift pump to a multi-media filter. The multi-media filter is further removed of organic matter and suspended solids in the sewage through the filtration and adsorption of activated carbon. The effluent flows automatically into the disinfection tank, where chlorine dioxide is added to disinfect the bacteria in the sewage to meet the requirements, and then reused after meeting the standards.
The multi-media filter undergoes regular backwashing, and the backwashed water enters the regulating tank for further treatment. The sludge from the secondary sedimentation tank is discharged into the sludge concentration tank through a sludge pump and regularly cleaned and transported outside.

In addition to complete sets of sewage treatment equipment, air flotation machines, filter presses, and supporting water tanks, fans, water pumps, aerators, and biological fillers, our company also sells waste treatment equipment such as medical waste incinerators, pet and poultry carcass incinerators, etc.

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