Against the backdrop of rapid industrialization and urbanization, the discharge of sewage continues to increase, making sewage treatment a core issue for environmental protection and sustainable development. Traditional sewage treatment processes have problems such as large land occupation, long construction cycles, and complex operation and maintenance, which make it difficult to meet the sewage treatment needs of small and medium-sized scenarios. As an integrated and efficient innovative technology, the MRB integrated sewage treatment equipment, with its modular design and precise treatment capacity, has become an ideal choice for solving decentralized sewage and small-to-medium-sized industrial wastewater treatment.​

1. Core Technologies and Principles of MRB Integrated Sewage Treatment Equipment​

The MRB integrated sewage treatment equipment combines the advantages of the biofilm method and the activated sludge method. Through a modular integrated design, it integrates treatment units such as grids, regulating tanks, biological reaction tanks, sedimentation tanks, and disinfection tanks into one, realizing "one-stop" sewage purification. Its core technical features are as follows:​

1.1 Efficient Biological Treatment System​

The interior of the equipment adopts a modified biological reactor (MRB). By optimizing the microbial community structure and strengthening the synergy of aerobic, anoxic, and anaerobic environments, it efficiently degrades pollutants in sewage such as COD (Chemical Oxygen Demand), BOD (Biochemical Oxygen Demand), ammonia nitrogen, and total phosphorus. The effluent quality can stably meet the first-class A standard of the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plants (GB18918-2002) or specific industry discharge standards.​

1.2 Modular Integrated Design​

The equipment does not require on-site civil construction. All treatment units are prefabricated and assembled, and the scale can be flexibly adjusted according to the sewage volume (ranging from 5m³/d to 500m³/d). The installation cycle is shortened to 1/3 of that of traditional processes, significantly reducing construction costs and time costs.​

1.3 Intelligent Control System​

Equipped with an online monitoring and automatic control system, it can real-time monitor key parameters such as water temperature, pH value, and dissolved oxygen. Through the PLC system, it automatically adjusts the operation status of aeration and reflux, reducing manual intervention and ensuring the stable operation of the equipment.​

2. Core Advantages of MRB Integrated Sewage Treatment Equipment​

Compared with traditional sewage treatment processes, the MRB integrated equipment shows significant advantages in practicality and economy:​

• Small Land Occupation: The integrated design enables the equipment to occupy only 50%-70% of the land area of traditional processes, making it particularly suitable for small and medium-sized enterprises, rural communities, scenic spots, and other scenarios with tight land resources.​

• High Treatment Efficiency: The optimized design of the biological reaction system shortens the sewage retention time. The COD removal rate can reach more than 90%, the ammonia nitrogen removal rate exceeds 85%, and the effluent quality is stable and reliable.​

• Low Operation and Maintenance Costs: Automatic control reduces labor input. The sludge output is 30% lower than that of traditional processes, resulting in lower subsequent treatment costs. At the same time, the equipment adopts energy-saving aeration and mixing devices, reducing energy consumption by 15%-20%.​

• Strong Adaptability: It can cope with fluctuations in water quality and quantity, and has a good treatment effect on various types of sewage such as domestic sewage, food processing wastewater, breeding wastewater, and medical wastewater.​

• Convenient Installation and Flexible Relocation: The modular structure supports quick installation and disassembly. If the project site changes, the equipment can be relocated and reused as a whole, improving asset utilization.​

3. Application Scenarios of MRB Integrated Sewage Treatment Equipment​

Based on its flexible and efficient characteristics, the MRB integrated sewage treatment equipment is widely used in the following scenarios:​

• Decentralized Domestic Sewage: Rural centralized residential areas, town communities, villa areas, and other areas without municipal pipe network coverage;​

• Small-to-Medium-Sized Industrial Wastewater: Pretreatment or advanced treatment in industries such as food and beverage, slaughtering and breeding, textile printing and dyeing, and mechanical processing;​

• Public Facility Sewage: Sewage treatment in scenic spots, expressway service areas, stations, schools, hospitals, and other places;​

• Emergency Sewage Treatment: Temporary sewage treatment after floods and sewage purification in engineering construction camps.​

4. Key Points for Selection, Operation and Maintenance of MRB Integrated Sewage Treatment Equipment​

4.1 Scientific Selection​

The selection needs to consider factors such as sewage discharge volume, water quality characteristics (such as pollutant concentration, pH value, and whether it contains toxic substances), discharge standards, and site conditions. Professional technical teams should conduct water volume calculation and process matching to maximize the equipment efficiency.​

4.2 Daily Operation and Maintenance​

• Regularly clean up debris in the grid to prevent pipeline blockage;​

• Monitor the microbial activity in the biological reactor and supplement nutrients in a timely manner;​

• Regularly inspect the aeration system and mixing device to ensure uniform oxygen supply;​

• Replace the consumables of disinfection equipment (such as UV lamps and disinfectants) in accordance with specifications to ensure the safety of effluent.​

4.3 Long-Term Management​

It is recommended to establish an equipment operation ledger to record daily data such as treated water volume, inlet and outlet water quality, and energy consumption. Combined with the quarterly maintenance plan, troubleshoot in a timely manner to extend the service life of the equipment.​

Conclusion​

With its advantages of high efficiency, energy saving, and flexibility, the MRB integrated sewage treatment equipment provides a standardized and intensive solution for small and medium-sized sewage treatment. It not only lowers the threshold of sewage treatment but also promotes the development of environmental protection technology towards the direction of "low cost, high efficiency, and easy maintenance". Against the background of the country's vigorous promotion of the "Water Pollution Prevention and Control Action Plan" and the rural revitalization strategy, the MRB integrated equipment will play an important role in water pollution prevention and control and water environment improvement, contributing to the construction of a green and sustainable ecological environment.