I. Core Value of Professional Sewage Treatment Equipment: From Compliance Discharge to Resource Recycling

The core difference between professional sewage treatment equipment and ordinary treatment facilities lies in its standardized design, efficient treatment capacity, stable operation performance, and compliance guarantee. Its core value is reflected in three dimensions:

• Precise purification to ensure compliance discharge: Through targeted process design, it can efficiently remove pollutants such as COD, BOD, suspended solids, ammonia nitrogen, and total phosphorus from sewage. It strictly complies with national and local standards such as the "Discharge Standards of Pollutants for Municipal Wastewater Treatment Plants" (GB18918-2002) and "Wastewater Discharge Limits for Industrial Enterprises", avoiding the risk of environmental penalties.
• Resource recovery to reduce comprehensive costs: Advanced professional equipment can realize the recycling of water resources, heat energy, biomass, and other resources in sewage. For example, reclaimed water after treatment is used for production cooling and green irrigation; sludge is made into organic fertilizer or fuel after dehydration and drying, helping enterprises reduce costs and increase efficiency.
• Stable operation to adapt to complex working conditions: Industrial sewage has complex components and large fluctuations in water quality and quantity. Through modular design and intelligent control systems, professional equipment can meet the sewage treatment needs of different industries (such as chemical, textile, food, and pharmaceutical industries), ensuring long-term stable operation and reducing operation and maintenance costs.

II. Core Types and Applicable Scenarios of Professional Sewage Treatment Equipment

Different sewage properties, treatment scales, and discharge requirements correspond to different types of professional sewage treatment equipment. The following are the mainstream and widely used equipment categories in the market:

1. Integrated Sewage Treatment Equipment

• Core features: Integrates multiple processes such as sedimentation, filtration, biochemical reaction, and disinfection. It has a small footprint, easy installation, and high automation.
• Applicable scenarios: Small and medium-sized enterprises, urban communities, rural centralized water supply points, medical clinics, etc. The treatment scale is 5-500m³/d, especially suitable for scenarios with limited space.
• Core advantages: No need to build separate structures, short commissioning cycle, low operation and maintenance difficulty. The effluent can meet Class 1A or reclaimed water standards.

2. MBR (Membrane Bioreactor)

• Core features: Combines membrane separation technology with biological treatment processes. Uses ultrafiltration/microfiltration membranes instead of traditional secondary sedimentation tanks, with high interception efficiency and excellent effluent quality.
• Applicable scenarios: High-concentration organic wastewater (such as food processing and pharmaceutical wastewater), reclaimed water reuse projects, and high-end manufacturing industries with high requirements for effluent quality.
• Core advantages: COD removal rate can reach over 95%, effluent can be directly used in production processes, low sludge yield, and strong shock load resistance.

3. Dissolved Air Flotation (DAF) and Shallow Air Flotation Equipment

• Core features: Introduces microbubbles into sewage to make suspended particles, oil, and other pollutants adhere and float up, realizing solid-liquid separation.
• Applicable scenarios: Oil-containing wastewater (such as mechanical processing and petrochemical industries), papermaking wastewater, printing and dyeing wastewater, algae-containing sewage, etc., especially suitable for treating light suspended solids.
• Core advantages: High separation efficiency, short residence time (only 10-20 minutes), small footprint, and effective removal of emulsified oil and fine suspended particles.

4. Bar Screen Machines and Sedimentation Equipment

• Core features: Core pretreatment equipment. Bar screen machines are used to intercept large solid impurities (such as branches and waste residues); sedimentation equipment (horizontal and vertical sedimentation tanks) realizes gravity sedimentation separation.
• Applicable scenarios: Pretreatment stage of all sewage treatment projects, which is a key equipment to ensure the stable operation of subsequent processes.
• Core advantages: Low operating energy consumption, simple maintenance, avoiding clogging of subsequent equipment, and extending the service life of the overall treatment system.

5. Disinfection Equipment (Ultraviolet Disinfection, Chlorine Dioxide Disinfection)

• Core features: Kills pathogenic microorganisms such as bacteria and viruses in sewage to ensure the hygienic safety of effluent.
• Applicable scenarios: Terminal treatment links of municipal wastewater treatment plants, medical wastewater treatment, and reclaimed water reuse projects.
• Core advantages: Stable disinfection effect, no secondary pollution (ultraviolet disinfection) or low pollution risk (chlorine dioxide disinfection), meeting hygiene standard requirements.

III. Scientific Selection of Professional Sewage Treatment Equipment: Four Core Principles

Reasonable selection directly determines the sewage treatment effect and operating cost. It is necessary to follow the four core principles of "adaptability, economy, compliance, and forward-looking":

• Adapt to sewage quality and quantity: First, clarify the pollutant types (such as organic pollution, inorganic pollution, heavy metal-containing) and concentration range through water quality testing. Combine with the daily average sewage discharge to select equipment with corresponding treatment capacity and processes. For example, high-salt wastewater needs to be equipped with salt-tolerant biochemical equipment, and heavy metal-containing wastewater needs to add chemical precipitation modules.
• Comply with discharge and reuse requirements: Determine the treatment accuracy of the equipment according to the discharge limits specified by local environmental protection departments (such as Class 1A, Class 1B) or reuse purposes (such as greening, production water). For example, reclaimed water reuse requires the selection of MBR membrane equipment or advanced filtration equipment to ensure the effluent meets the "Code for Design of Urban Sewage Reclamation and Reuse Engineering" (GB50335-2016).
• Balance site and operating costs: For narrow sites, prioritize integrated and modular equipment; for areas with energy shortages, select energy-saving equipment (such as frequency conversion aeration equipment); when there is a shortage of operation and maintenance personnel, prioritize equipment with high automation (such as PLC control system) and long maintenance cycles to reduce labor costs.
• Reserve upgrading and expansion space: When selecting equipment, consider the enterprise's future capacity expansion or the upgrading of environmental protection standards. Reserve 10%-20% redundancy in equipment treatment capacity, and core components support modular upgrading to avoid repeated investment.

IV. Technological Upgrading Trends of Professional Sewage Treatment Equipment: Intelligence, Energy Conservation, and Greenization

With the rapid development of environmental protection technology, professional sewage treatment equipment is upgrading towards the direction of "high efficiency, intelligence, and low carbon". The core trends include:

• Intelligent regulation: Integrate PLC control systems, online monitoring sensors (such as real-time COD and ammonia nitrogen monitoring), and IoT modules. Realize real-time monitoring of equipment operation status, automatic parameter adjustment, and fault early warning. Reduce manual intervention and improve operation stability.
• Energy-saving design: Adopt technologies such as high-efficiency aeration systems (such as diaphragm aerators), energy-saving motors, and solar auxiliary power supply to reduce equipment operating energy consumption. Realize energy recovery (such as biogas power generation) through process optimization (such as anaerobic-aerobic combined process).
• Modularization and standardization: Equipment adopts standardized modular design, which can be flexibly combined and expanded according to treatment needs, shortening the production and installation cycle. Core components are produced in a standardized manner, reducing maintenance and replacement costs.
• Application of green materials: Use corrosion-resistant and environmentally friendly materials (such as 304 stainless steel, FRP) to reduce secondary pollution caused by equipment aging, extend equipment service life, and conform to the concept of green manufacturing.

V. Typical Application Scenarios of Professional Sewage Treatment Equipment

• Industrial field: Chemical enterprises adopt "pretreatment + MBR membrane bioreactor + advanced treatment" equipment to treat high-concentration organic chemical wastewater. The COD removal rate reaches 98%, and the effluent meets discharge standards; textile printing and dyeing enterprises remove dyes and auxiliaries from sewage through "bar screen + air flotation machine + biochemical treatment" equipment, realizing reclaimed water reuse with a water saving rate of 40%.
• Urban domestic sewage: Small and medium-sized cities and towns adopt integrated sewage treatment equipment to centrally treat domestic sewage. The treatment scale is 100-500m³/d, and the effluent meets Class 1A standards for irrigation of surrounding farmland and river replenishment.
• Rural sewage treatment: Rural decentralized sewage treatment projects adopt small integrated equipment combined with ecological treatment processes (such as constructed wetlands) to solve the problem of random sewage discharge in rural areas and improve the living environment.
• Medical wastewater: Hospitals use special equipment of "disinfection pretreatment + biochemical treatment + ultraviolet disinfection" to remove pathogenic microorganisms and drug residues from medical wastewater, ensuring compliance discharge and avoiding environmental pollution.

Conclusion

Professional sewage treatment equipment is the core support for solving water pollution problems and promoting water recycling. The scientificity of its selection and the advancement of its technology directly affect the sewage treatment effect and the cost-effectiveness of environmental protection investment. When selecting equipment, enterprises and environmental practitioners should combine practical factors such as sewage properties, treatment requirements, and site conditions, and prioritize professional equipment with strong compliance, stable operation, energy conservation, and environmental protection. In the future, with the continuous upgrading of intelligent and green technologies, professional sewage treatment equipment will play a more important role in environmental governance, helping all industries achieve the goal of "green production and sustainable development".