Manufacturer of sewage treatment equipment in residential areas

Manufacturer of sewage treatment equipment in residential areas

Residential sewage is different from urban sewage (often including some industrial wastewater) and belongs to the category of domestic sewage. Its water quality and quantity can be summarized as follows: the water quality and quantity vary greatly, the pollutant concentration is low, that is, lower than urban sewage, the sewage has good biodegradability, and the treatment difficulty is small.

Requirements and degree of effluent treatment
Generally speaking, there are significant differences in the requirements for water discharge among different residential areas. The treatment level should be determined according to regulations and local department requirements to ensure the quality of the effluent. If the effluent is treated by land treatment method, it shall be calculated according to the requirements of the land treatment method;
The design and construction of sewage treatment facilities must be combined with the overall planning and building points of the community, that is, the exterior design should be coordinated with the building environment of the community in order to achieve beauty;
Strive for simplicity in sewage treatment processes to facilitate management;
In terms of elevation layout, a three-dimensional layout should be adopted as much as possible to fully utilize underground space. The layout should be compact to save land;
The sewage treatment site should be located as downwind as possible in the residential area, at a certain distance from other buildings, to reduce the impact on the environment;
Equipment oriented, standardized, modular, easy to construct, equipped, suitable for phased construction;
Treatment process, with low sludge production, and using treatment technology as much as possible;
The adaptability range of structures to hydraulic and mechanical loads is relatively large, enabling the system to better withstand impact loads.
The population in the community is gradually increasing. Therefore, the sewage treatment in residential areas should be based on the expected development plan as the basis for flow design. Based on my situation, a design cycle of 20 years can be considered.

process flow
According to the principles of wastewater treatment in residential areas, the treatment method should be focused on minimizing sludge production. Various buildings in the community system are generally equipped with septic tanks, so septic tanks should be combined with sewage treatment methods.

Main process structures (buildings) and processing equipment

1. Grille

The grid well is located at the inlet end of the sewage source in the regulating tank, with the design considering land and investment savings.

Artificial grids are installed in the grid well to intercept and remove larger suspended solids and paper scraps in the sewage, protecting the water pump and subsequent pipeline system from blockage. Adopting stainless steel artificial grille, the size of the grille well is 1000 × 600 × 1500mm. A cover plate is also installed on the grille well to prevent freezing.

2. Regulating pool

A sewage regulating tank is installed throughout the entire treatment system. By adjusting the pool settings, water quality and quantity can be fully balanced, allowing sewage to enter the subsequent treatment units more evenly, improving the impact resistance of the entire system, and reducing the design scale of the treatment units. Beneficial for reducing the impact of water quality fluctuations. Install submersible mixing pumps in the regulating tank to prevent sedimentation and achieve water quality balance. Set the liquid level device, and the water pump will automatically start according to the liquid level.

3. Sedimentation tank

Perform solid-liquid separation to remove the biofilm and suspended sludge peeled off from the biochemical tank, so as to truly purify the sewage.

The sludge is treated with a timed sludge tank and equipped with a sludge lifting and returning device. Some of the sludge is returned to the biological treatment tank for nitrification and denitrification, which also reduces the generation of sludge and facilitates the removal of ammonia nitrogen from sewage.

4. Hypoxia pool

Due to the high organic content in sewage and the good biodegradability of BOD5/CODcr=0.5, the design adopts biofilm method.

Due to the high content of organic nitrogen in sewage, it will appear in the form of ammonia nitrogen during biodegradation. Therefore, the indicators of ammonia nitrogen entering the water will increase, and ammonia nitrogen is also a pollutant. Therefore, an anoxic tank is added before contacting the oxidation tank. The anoxic tank can use the nitrate brought in by the reflux mixture and the organic carbon source in the influent for denitrification, reducing NO2- and NO3- in the influent to N2 for denitrification, and degrading ammonia nitrogen while removing organic matter.

Solution to the malfunction of sewage treatment equipment manufacturers in residential areas

1、 If any leakage or rupture is found in the pipeline system of the sewage treatment equipment in the community, the machine should be stopped immediately. The leaked sewage should be strictly managed and discharged back to the regulating pool for reprocessing; Notify the maintenance personnel to repair the pipeline leak and block it with electric welding; If a malfunction causes the sewage treatment equipment in the community to malfunction, the backup sewage reservoir should be immediately activated to prevent environmental pollution caused by sewage discharge. If the malfunction is expected to be resolved within a few days, contact a tanker truck to transport the sewage to the sewage treatment station for treatment. At the same time, organize personnel for emergency repairs, notify the equipment to arrange personnel to the site as soon as possible to troubleshoot the malfunction, or notify the equipment in writing of the detailed situation of the on-site malfunction for technical personnel to analyze the malfunction.
2、 Abnormal water discharge from equipment: Check if the connecting pipes of the contact oxidation tank, sedimentation tank, disinfection tank, and sludge tank are blocked (usually caused by detached biofilm and damaged elastic three-dimensional packing).
3、 The reason for the poor effluent quality of the community sewage treatment equipment is that the inflow is too large, the aeration of the contact oxidation tank is uneven, or it has been shut down for a long time (at this time, it is necessary to re cultivate the biofilm), the sedimentation tank has too much sludge (it is necessary to remove the sludge, the disinfection device is shut down, and the effluent is not disinfected).
4、 Uneven aeration of the equipment in contact with the oxidation tank: Check if the outlet valve of the aeration fan is in the normal position and if the aeration head is damaged.
5、 Solution to equipment automatic control failure: Check if the power supply of the automatic control cabinet is normal, and check if the lifting pump and aeration fan supporting the community sewage treatment equipment are damaged (at this time, excessive current may cause the short-circuit switch to automatically disconnect).
6、 The biological membrane contact effect of the equipment is not obvious: check whether the aeration in the contact oxidation tank is uniform, and whether the sludge in the secondary sedimentation tank is pumped to the tank. If the above conditions are normal, add an appropriate amount of nutrients (such as white sugar, urea, etc.) to the tank.