Efficient biological super magnetic separation system

• Product Overview

The High-Efficiency Bio-Supermagnetic Separation System is a wastewater treatment solution developed by our company, integrating bioaugmentation and supermagnetic separation technologies. By adding magnetic seeds and biological carriers to wastewater, this system utilizes the magnetic seeds 'efficient pollutant capture and the biological carriers' degradation capabilities. Under an ultra-strong magnetic field, it achieves rapid solid-liquid separation, providing a compact process with short hydraulic retention time and rapid start-up for removing suspended solids, total phosphorus, and certain organic compounds. This solution combines physical-chemical and biochemical treatment processes for efficient wastewater management.

• Structure and Working Principle

1. Core structural composition

The system is typically an integrated skid or modular unit, primarily comprising the following core processing modules:

• Mixed reaction unit: This unit comprises a magnetic seed and chemical dosing system, a biological carrier dosing zone, and a high-efficiency mixer. In this unit, magnetic seeds, coagulants/flocculants, and the wastewater to be treated are thoroughly mixed, allowing pollutants to bind with magnetic seeds and biological carriers, thereby forming "magnetic microflocs".
• Super Magnetic Separation Host (Core): The core solid-liquid separation unit, internally equipped with a magnetic disk array or magnetic medium that generates a high-gradient magnetic field. When "magnetic microflocs" flow through the magnetic field region, they are rapidly adsorbed and captured.
• Magnetic seed recovery and regeneration system: Using specialized magnetic seed separation equipment (e.g., high-speed shears), the system extracts magnetic seeds containing contaminants from sludge. After cleaning, these seeds are recycled for reuse, achieving efficient magnetic seed recovery.
• Bioreinforcement system (optional or integrated): The system can incorporate or immobilize specific functional microbial carriers, which undergo biodegradation during the reaction process to enhance the removal of organic pollutants.
• Automatic control system: Integrated PLC control cabinet to achieve automatic control of chemical dosing, disk rotation speed, liquid level, and system interlock.

2. Working Principle

The system follows the core physicochemical process of "magnetic seed combination—magnetic force separation—magnetic seed recovery" and can be coupled with biological processes:

1. Magnetic flocculation reaction: Add micron-sized magnetic seeds and a small amount of coagulant/flocculant to the wastewater. Under stirring, a "magnetic flocculation" rapidly forms with the magnetic seeds as the core (with a density significantly higher than that of ordinary chemical flocs). Simultaneously, biological carriers (if present) adsorb pollutants and provide a biodegradation interface.
2. Supermagnetic separation: The mixed liquid flows into the supermagnetic separation host and passes through a high-intensity magnetic field region composed of rare-earth permanent magnetic materials. Under the strong magnetic force, magnetic flocs are instantly adsorbed onto the surface of the magnetic disk, while the clear water passes through smoothly, achieving high-speed solid-liquid separation within seconds.
3. Magnetic seed recovery and sludge dewatering: The magnetic disk attached to the sludge rotates to the scraping zone, where the sludge is scraped off. The mixed sludge containing magnetic seeds and biological carriers enters the recovery system. Through high-speed shearing and separation, the magnetic seeds and biological carriers are recovered and returned to the system for reuse, while the remaining sludge is discharged, significantly reducing sludge production.

• Core technical features

1. High separation efficiency with clear effluent: Utilizing high-gradient magnetism for solid-liquid separation, the process achieves rapid operation (completed within minutes) and demonstrates significant removal of suspended solids (SS) and total phosphorus (TP), yielding visually clear water.
2. Compact footprint and streamlined process: The system's rapid reaction and separation speeds eliminate the need for conventional sedimentation tanks, featuring high integration. Its footprint is typically just a fraction of traditional processes, making it ideal for space-constrained or expansion projects.
3. Rapid start-up and flexible operation: The system primarily relies on physical separation, which is relatively less affected by temperature and water quality fluctuations. It enables quick start-up and shutdown, facilitating the handling of intermittent or shock drainage.
4. High sludge concentration with recyclable magnetic seeds: The generated sludge has low moisture content, demonstrating significant volume reduction. The magnetic seed recovery rate can reach a high level (e.g.,>95%), and reuse reduces operational material costs.
5. Coupled bioenhancement and functional expansion: By adding specific biological carriers, the system can achieve efficient physicochemical removal of phosphorus and turbidity while enhancing the removal of organic matter (COD) and ammonia nitrogen, thereby broadening its application scope.

• Main technical parameters

• Typical Application Fields

This system is suitable for various water treatment scenarios with high requirements on processing efficiency, land use, and effluent sensory characteristics.

• Municipal wastewater treatment: As a primary enhanced treatment or advanced phosphorus removal unit in wastewater plants; used for rapid purification of combined sewer overflow (CSO) or initial stormwater.
• industrial waste disposal ：
• Coal mine, ore washing, metallurgical wastewater: high efficiency removal of suspended solids and heavy metals.
• Wastewater from papermaking, printing and dyeing, and food processing: clarification, decolorization, and pretreatment.
• Phosphorus-containing industrial wastewater: such as phosphorus chemical and electroplating wastewater for phosphorus removal.
• Treatment and emergency management of black and odorous water bodies: A project for rapid purification and water quality improvement of surface water in rivers, lakes, and other areas.
• Water plant pretreatment: Water treatment plants should perform pretreatment for high-turbidity raw water or algal blooms.