Small scale medical sewage treatment equipment——Application scope of buried sewage treatment equipment:
1Factory domestic sewage treatment, mining domestic sewage treatment, sewage treatment, school canteen sewage treatment, tourist point sewage treatment, highway service area toll station sewage treatment, scenic area sewage treatment;
2Hotel sewage treatment, restaurant sewage treatment, sanatorium sewage treatment, hospital sewage treatment;
3Residential area sewage treatment, villa area sewage treatment, commercial building sewage treatment, new rural sewage treatment, and town domestic sewage treatment;
4Station sewage treatment, harbor terminal sewage treatment, ship factory sewage treatment;
5Wastewater treatment in aquatic processing plants, livestock processing plants, fresh milk processing plants, as well as production and domestic wastewater treatment in various factories;
6Various industrial wastewater treatments similar to domestic sewage.

Small scale medical sewage treatment equipment——Process characteristics of buried municipal sewage treatment

Biological contact oxidation method is a wastewater biological treatment method derived from biofilm method, which involves filling a certain amount of packing material in the biological contact oxidation tank to utilize the biofilm attached to the packing material and sufficient supply of oxygen,Through biological oxidation,Oxidative decomposition of organic matter in wastewater,Achieve the purpose of purification. The biofilm process, which has the characteristics of activated sludge process, combines the advantages of both activated sludge process and biofilm process. Under biochemical conditions, it has achieved good economic benefits in the treatment of industrial wastewater, aquaculture wastewater, and domestic wastewater. This process is widely used in sewage treatment systems in various industries due to its high efficiency, energy saving, small footprint, shock load resistance, and convenient operation and management.

Residential sewage(Septic tank)After flowing into the fine grid tank to remove large particles that can settle and suspended solids in the water, it flows into the regulating tank. The effluent from the regulating tank enters the biological contact oxidation tank and is filled with soft packing for aeration. The wastewater flows through the packing layer to fill the surface of the packing with biofilm, increasing micro power. A small blower blows air to ensure that the sewage fully contacts the biofilm under aerobic conditions. The microorganisms in the sewage gradually oxidize the residual organic matter in the sewage into carbon dioxide, water, and cellular substances for purification. Simultaneously controlling the dissolved oxygen level to ensure that ammonia nitrogen in wastewater is converted from nitrifying bacteria to nitrate nitrogen. The effluent is subjected to solid-liquid separation in a sedimentation tank, and then introduced into a filtration tank filled with hard packing quartz sand to further adsorb and precipitate the effluent to meet the discharge requirements. The wastewater flows into the disinfection tank and is disinfected with chlorine dioxide to meet the effluent standards before being discharged.

The buried domestic sewage treatment technology, biological contact oxidation process, has the characteristics of small footprint and not easily damaging the surrounding community landscape. At the same time, the buried sewage device can also reduce the impact of noise and odor on residents in residential areas to a low level. The buried biological contact oxidation process applies micro motion force to change the state of insufficient oxygen supply and biological activity in sewage treatment equipment, and improves the removal rate of pollutants. The micro power aeration tank unit is a modular structure that can better meet the requirements of phased construction of residential sewage treatment plants.

Small scale medical sewage treatment equipment——debug process

1The installation of buried sewage treatment equipment should be operated by professionals. Firstly, the inlet valve and outlet valve need to be opened, and the equipment inlet lifting pump needs to be started to transport the sewage from the regulating tank (which can be constructed by civil engineering) to the underground domestic sewage treatment equipment.

2When using buried sewage treatment equipment for the first time, when the water level reaches the equipment1/2Stop the water pump from entering when the height is reached, open the inlet valve of the fan, turn on the fan, slowly open the outlet valve of the fan, and aerate the contact oxidation tank48After hours, start the water inlet lift pump to add sewage to the equipment3/4Add air to the pool again24Hour.

3During use, operators should touch the filler with their hands to check for any stickiness and observe the growth of microorganisms in the water until a layer of orange yellow biofilm grows on the filler. Only then can sewage be continuously transported to the equipment, and the water volume should gradually increase to the design water volume.

4During the process, it is necessary to observe the flow state of the secondary sedimentation tank, and the water collection of the outlet weir must be uniform. Generally, every24The sludge must be discharged once every hour. When discharging, open the sludge discharge solenoid valve and use the air lift method to lift the sludge in the secondary sedimentation tank to the sludge tank.

5After the debugging of the buried sewage treatment equipment is completed and it is running normally, the system can enter automatic operation. Switch the operation of the water pump and fan to automatic mode on site, as the electrical control cabinet utilizesPLCThe automatic control program has been programmed before the equipment leaves the factory (usually switched once per shift), and there is no need to set it separately during operation.

Small scale medical sewage treatment equipment——The main function of dissolved oxygen in buried domestic sewage treatment equipment
The role of dissolved oxygen in activated sludge treatment cannot be ignored, as it is closely related to the partial pressure of oxygen in the air, atmospheric pressure, water temperature, and water quality. Some compounds in sewage undergo biodegradation under the action of aerobic bacteria, which consumes dissolved oxygen in the water. Dissolved oxygen should be maintained at a certain concentration. During the aerobic process of buried domestic sewage treatment equipment, dissolved oxygen in water is continuously replenished due to the dissolution of oxygen in the air and the photosynthesis of green aquatic plants. But when water is polluted by organic matter, oxygen consumption is severe, and dissolved oxygen cannot be replenished in a timely manner, anaerobic bacteria in the water will quickly multiply. Organic matter will cause the water to turn black and odorous due to decay, and the metabolism of sludge will be affected. The expansion phenomenon of sludge will cause filamentous bacteria, which will breed and affect the purification effect. However, it is also necessary to control the concentration of dissolved oxygen well. If it is too high, the oxygen transfer rate will decrease, increase the power cost of buried domestic sewage treatment equipment, cause peroxidation of activated sludge, and the sludge will not flocculate, affecting the sedimentation effect of flocculants. In natural conditions, the oxygen content in the air does not change much, and water temperature is the main factor. The lower the water temperature, the higher the dissolved oxygen content in the water. The molecular oxygen dissolved in water is called dissolved oxygen, usually referred to asDOExpressed in milligrams of oxygen per liter of water. The amount of dissolved oxygen in water is an indicator of the self purification capacity of a water body. Dissolved oxygen value is a basis for studying the self purification ability of water. The general dissolution concentration should be maintained2mg/lActivated sludge can maintain a good condition and the treatment effect will be in an excellent state.

Small scale medical sewage treatment equipment——Maintenance method for buried sewage treatment equipment:

1It is necessary to pay attention to the absence of large solid substances in the sewage entering the equipment, in order to avoid blocking the pipes and holes and damaging the water pump;
2The equipment manhole must be covered to prevent accidents or large solid objects from falling in;
3Wastewater entering the equipmentPHThe value must be within6—9Between them, being acidic or alkaline can affect the normal growth of biofilms
4The fan generally operates6It is necessary to change the engine oil every month or so to improve the service life of the fan;
5It is necessary to ensure that the air inlet of the fan is unobstructed.
6Troubleshooting of buried sewage treatment equipment.