Zhejiang Huier Coating Environmental Protection Equipment Co., Ltd
                                                                                                           
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Experience the Benefits of Our High-Performance Environmental Protection Equipment for Wastewater Treatment

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Product Description
High-Performance Environmental Protection Equipment for Wastewater Treatment
Equipment Description
Principle of Underground Wastewater Treatment Equipment
  • Multi-Stage Biological Treatment Process: Wastewater passes through pretreatment (screens intercept large impurities), a regulating tank (water quality and quantity homogenization), an anaerobic zone (organic matter hydrolysis and denitrification), an aerobic zone (organic matter oxidation and nitrification), an anoxic zone (denitrification and denitrification), and a sedimentation zone (sludge separation). Finally, it undergoes disinfection before discharge or reuse.
  • Anaerobic Zone: Anaerobic bacteria decompose large organic molecules, releasing biogas and performing preliminary nitrogen removal.
  • Aerobic Zone: Aerobic bacteria mineralize organic matter and nitrify ammonia nitrogen.
  • Anoxic Zone: Denitrifying bacteria convert nitrates into nitrogen gas, completing nitrogen removal.
  • Synergistic Effect of Biofilm and Activated Sludge: Combining the biofilm process (biofilm-forming microorganisms) with the activated sludge process (suspended microbial communities) improves organic matter degradation efficiency and shock load resistance, while reducing sludge production.
Core Structure
  • Pretreatment Unit: Screens intercept large particles such as hair and plastic to prevent pipe blockage; Equalization Tank buffers water volume fluctuations and maintains balanced water quality.
  • Biological Treatment Unit: Anaerobic Zone utilizes elastic fillers to enhance microbial attachment; Aerobic Zone equipped with aeration devices; Anoxic Zone utilizes an internal circulation design.
  • Post-Treatment Unit: Sedimentation Tank utilizes inclined tube or vertical flow sedimentation; Disinfection Device utilizes UV or chemical disinfection.
  • Intelligent Control System: Integrated PLC automatic control module monitors water quality parameters in real time and supports remote monitoring.
Technical Advantages
  • Space Efficiency: Fully buried design reduces floor space by over 70%.
  • Stable Operation: Modular design adapts to water quality fluctuations with effluent meeting Class A standards.
  • Convenient Operation and Maintenance: Low sludge production (discharged every 90 days) with automated control.
  • Energy Saving and Low Carbon: Optimized aeration system reduces energy consumption by 30%.
Scope of Application

Suitable for small- to medium-scale (20-500 m³/d) applications including domestic sewage (rural areas, scenic spots, residential areas), food processing wastewater, and hospital wastewater.

Technical Parameter Examples
Project Parameter Range
Processing Capacity 10-500 m³/d
COD Removal Rate ≥85%
Ammonia Nitrogen Removal Rate ≥90%
Operating Power 0.5-3 kW (adjusted based on throughput)
Effluent Standard GB 18918-2002 Class A/B Standard
Main Structures and Components
Pretreatment Unit
  • Screens intercept large impurities (such as hair and plastic) in wastewater, preventing clogging of subsequent equipment. Filtering is performed in two stages: coarse and fine screens.
  • Equalization Tanks homogenize water quality and volume, buffering against fluctuations in wastewater flow. These tanks are typically constructed of reinforced concrete or fiberglass.
Biological Treatment Unit
  • Anaerobic Zone: Anaerobic bacteria decompose large organic molecules, while elastic packing enhances microbial attachment for initial nitrogen removal.
  • Anoxic Zone: Incorporating an internal circulation design, denitrifying bacteria convert nitrates into nitrogen gas, further removing nitrogen.
  • Aerobic Zone (Contact Oxidation Tank): Forced aeration or microporous aerators provide oxygen, promoting aerobic bacteria to degrade organic matter and nitrify ammonia nitrogen.
  • Membrane Bioreactor (MBR) (Optional): Integrated MBR membrane modules replace traditional secondary clarifiers for efficient solid-liquid separation and improved effluent quality.
Post-treatment Units
  • Sedimentation Tanks: Inclined plate sedimentation tanks or vertical flow sedimentation tanks separate suspended sludge after biological treatment.
  • Disinfection Tanks: Ultraviolet light or chemical disinfection (such as chlorine tablets) is used to ensure that the effluent meets microbial standards.
  • Clear Water Tanks: Store qualified effluent for reuse or discharge.
Auxiliary Systems
  • Sludge Treatment System: The sludge tank collects sludge from the sedimentation tank and returns it to the biochemical tank via a sludge pump or periodically discharges it to the outside.
  • Aeration System: Consists of a blower, aeration piping, and microporous aeration heads, providing oxygen to the biological treatment unit.
  • Intelligent Control System: The PLC automation module monitors water quality parameters in real time, controls equipment startup and shutdown, and supports remote operation.
Structural Materials and Layout

Main Materials: Fiberglass tanks or reinforced concrete structures are corrosion-resistant and suitable for underground environments.

Underground Design: The entire equipment is buried underground, allowing the surface to be restored to greenery or roads, saving space.

Examples of Key Components
Component Name Functional Description Typical Parameters/Configuration
Grate Intercepts large particles Gap 6mm, 1000mm x 500mm
MBR Membrane Assembly Solid-liquid separation and improves water quality Japan Mitsubishi MBR membrane, flux 10-30L/(m²*h)
Blower Supply oxygen to drive biodegradation Power 0.5-3kW, one active, one standby configuration
Features
  • High cost performance: Achieves the best cost performance based on customer's product positioning and economic affordability.
  • Advanced design: Meticulous design concept and highly automated industrial equipment showcase modern enterprise image.
  • High adaptability: Meets current production requirements while allowing for future increased production and improved quality needs.
  • Quality compliance: Strict adherence to ISO900 quality management system with rigorous control of every installation detail.
Wastewater treatment equipment diagram

Get in Touch

Have questions about our products or want to discuss a custom order? Our team is ready to help you.

Company Zhejiang Huier Coating Environmental Protection Equipment Co., Ltd
Location Room 801, Building 1, No.10 Keyuan Road, Wuyang Street, Deqing County, Huzhou City, Zhejiang Province
Contact Person Chen Xianzhong

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