Small sewage treatment equipment

Operating principle

Small sewage treatment equipment adopts the combined process of pretreatment+anaerobic biochemical+aerobic contact oxidation+sedimentation and disinfection, multi-stage partition and sequential purification of sewage, streamlined and efficient process, and suitable for small sewage conditions with large water fluctuation.

The sewage first enters the regulating grid area to intercept hair, plastic bags and large particle suspended solids, balance water quality and quantity and buffer the fluctuation of sewage concentration; Sewage flows into the anaerobic zone automatically, and the anaerobic bacteria decompose macromolecular organics to improve the biodegradability of sewage; Then, it enters the aerobic biochemical zone, and the aeration system continuously supplies oxygen. A large number of microbial membranes are attached to the surface of the biological filler to absorb and oxidize the decomposition of organic pollutants and ammonia nitrogen; The biochemical mixed liquid flows into the inclined tube sedimentation tank to realize mud-water separation, the settled sludge automatically returns to the biochemical system, and a small amount of residual sludge is cleaned and transported regularly; The supernatant enters the disinfection unit and is disinfected by ultraviolet or agent to kill harmful bacteria groups. Finally, it is discharged to the standard or recycled. The whole process is mature and stable, with low operation noise and controllable peculiar smell.

Equipment configuration

The whole machine is modularized, integrated and formed into a whole, with reasonable partition layout, durable and reliable accessories, suitable for 24h continuous sewage treatment conditions, and the core configuration is as follows:

• Main body of anti-corrosion box: thickened GRP/carbon steel anti-corrosion box, with overall sealing and welding, anti-seepage, acid and alkali corrosion resistance, compression resistance and aging resistance. It is not easy to deform and leak in the buried environment for a long time.
• Efficient biological filler: elastic three-dimensional biological filler, with sufficient specific surface area, fast film hanging speed, large biobiota load, not easy to fall off, and guarantee continuous and efficient biochemical degradation.
• Silent aeration system: Low-noise Roots blower and micropore aerator are equipped, with uniform air distribution, high dissolved oxygen efficiency and low energy consumption, providing stable oxygen supply conditions for aerobic microorganism.
• Sewage lifting and return pump set: small submersible sewage pump and sludge return device, realizing automatic sewage delivery and sludge return, and reducing the total amount of sludge discharged.
• Inclined tube sedimentation component: hexagon honeycomb inclined tube filler, fast sedimentation speed, good solid-liquid separation effect, effective retention of suspended sludge, guarantee clear water.
• Terminal disinfection module: UV disinfection and chemical disinfection devices can be selected to remove coliform and meet the sanitary indicators of emission and recycling.
• Intelligent electric control system: integrated PLC full-automatic control, one-key start and stop, fault alarm, overload and water shortage protection, long-term unattended operation, simple operation.
• Optional supporting system: dephosphorization dosing device, anti-freezing insulation layer, soundproof device and online water quality monitoring module can be installed, which is applicable to high phosphorus sewage, low temperature and high standard acceptance conditions.

Product advantages

H6>Compact size, flexible installation and small footprint

Integrated compact design, small overall size, no need for large area of site and complex civil engineering, simple foundation pit construction, pipeline docking can be put into use, suitable for narrow site, scattered point sewage treatment.

H6>Mature and stable process, qualified and reliable effluent

AO contact oxidation process widely used in the market is adopted, with strong water quality and water impact resistance, stable removal of various organic pollutants, controllable effluent indexes, and easy response to environmental inspection and acceptance.

H6>Low energy consumption, less sludge, light operation and maintenance load

Low sludge output and long sludge discharge period of biological membrane process; Reasonable power configuration of fan and water pump, low power consumption, no need for full-time operation and maintenance personnel to be on duty for a long time, greatly reducing the long-term operation cost.

H6>closed operation, environmentally friendly

Fully enclosed box structure, low operation noise, effective suppression of odor diffusion, can be installed nearby residential areas such as homestays, villages, scenic spots, etc., without affecting the surrounding living environment.

H6>Flexible customization for multiple scenarios

Internal structure and configuration can be adjusted according to daily average water volume, influent concentration and discharge standard. Single unit operates independently and multiple units can be expanded in parallel to meet the requirements of decentralized sewage treatment of different scales.

Application Scenario

The decentralized sewage points without municipal sewage pipe network cover are widely used for various small domestic sewage treatment. The core application scenarios are as follows:

• Rural living sewage treatment: purification of rural single household and multi-household domestic sewage, assisting rural water environment transformation;
• Cultural tourism and leisure facilities: domestic sewage treatment for homestay, farmhouse, mountain village and small scenic spot;
• Temporary works: construction site project department, expressway service area and field camp domestic wastewater treatment;
• Small public buildings: domestic sewage of small schools, health rooms, toll stations and office buildings shall be treated to meet the standards;
• Small industrial and commercial wastewater: pre-treatment and purification of low-concentration organic wastewater from small restaurants and small workshops;
• Water resource recycling scene: the treated clean water is used for plant greening and site watering to realize water resource recycling.

Technical parameters

• Water treatment capacity: 0.5m ³/d - 50m ³/d (multiple units can be expanded in parallel)
• Main process regulation+anaerobic+aerobic contact oxidation+precipitation+disinfection
• The implementation standard can reach Grade II urban sewage standard/Grade I B standard
• COD removal rate ≥ 90%
• Ammonia nitrogen removal rate ≥ 88%
• Operation mode: 24-hour full-automatic continuous operation, unattended
• Installation form: buried type/surface type/semi-buried type optional
• Box material FRP/carbon steel anti-corrosion material
• Operating temperature 5 ℃ - 45 ℃
• Low-noise operation, suitable for installation near residential areas

After-sales guarantee

Provide one-stop scheme design, prefabrication and production, site installation, culture commissioning, long-term operation and maintenance services for small sewage treatment equipment, and ensure continuous and stable compliance of sewage system:

• Free site survey and water quality analysis, and customized treatment scheme according to daily average sewage volume, pollutant index and local emission requirements;
• Complete machine prefabrication and ex-factory, fast foundation pit construction on site, pipeline docking, and culture acclimatization commissioning to quickly achieve up-to-standard operation;
• One year warranty for the whole machine, special warranty for core parts such as fan, water pump, electric control and box, and lifetime technical support;
• Hour after-sales quick response, remote troubleshooting of equipment shutdown, unqualified effluent, abnormal aeration and other common faults;
• Provide value-added services such as biological culture supplement, packing replacement, equipment maintenance, process optimization and environmental protection acceptance assistance for the whole life.