Preface

In fields such as industrial water treatment, ecological restoration, and the operation and maintenance of circulating water systems, issues such as low mass transfer efficiency, high chemical consumption, frequent membrane fouling, and slow water body restoration have long constrained improvements in system performance. Conventional aeration and traditional air flotation equipment suffer from large bubble sizes, short retention times, and limited oxygen utilization rates, making it difficult to meet the demands for high-precision, low-energy, and eco-friendly treatment processes.

Leveraging proprietary technology based on "super-gravity swirling shear" combined with the "cavitation effect," JMFILTEC has independently developed an ultrafine bubble generator capable of stably producing high-concentration, high-activity ultrafine bubbles with an average diameter of 150-400nm. Centered on the principle of physical intensification, this technology achieves multiple functions—including efficient oxygenation, pollutant degradation, membrane fouling inhibition, equipment scale prevention, and water body activation—thereby providing stable, energy-efficient, and long-lasting upgrade solutions for various water treatment systems.

I. What Are Ultrafine Bubbles?

Ultrafine bubbles are microscopic bubbles with a size of less than 1 μm—approximately 5,000 times smaller than a grain of sand and about one million times smaller than a standard bubble—making them virtually invisible to the naked eye. Compared to standard bubbles and microbubbles, ultrafine bubbles exhibit distinct characteristics:

Standard Bubbles (Diameter > 1 mm): Visible to the naked eye; rise rapidly to the water surface; have a short retention time.

Microbubbles (Diameter 10–30 μm): Visible as a white mist; rise relatively quickly; dissipate within a few minutes.

Ultrafine Bubbles (Diameter < 1 μm): Invisible to the naked eye; can remain stably suspended in water for extended periods; possess a retention time lasting up to 2–3 months.

Image Source: Internet

II. Four Core Characteristics of Ultrafine Bubbles

Image Source: Internet

1. Extremely Long Retention Time in Water (2–3 Months)

According to Stokes' Law, the smaller a bubble's diameter, the slower its rising velocity. When the diameter of ultrafine bubbles approaches 1 μm, their rising velocity approaches zero. Influenced by Brownian motion, these bubbles follow a meandering path through the water and possess an exceptionally long retention time; they can distribute themselves uniformly throughout the entire water body, unaffected by water depth or temperature.

2. Strongly Negatively Charged Surface

The zeta potential of ultrafine bubbles can reach 40 mV to 100 mV, allowing them to remain stable in water for extended periods. This characteristic enables them to strongly adsorb positively charged suspended particles, colloids, and emulsified oils present in the water, thereby significantly enhancing the efficiency of flocculation and solid-liquid separation, while simultaneously improving water clarity.

3. Extremely High Mass Transfer Efficiency (Oxygen Transfer Rate > 85%)

Ultrafine bubbles possess an exceptionally large specific surface area. Coupled with their high internal pressure characteristics (a self-pressurization effect), the rate of gas dissolution is drastically accelerated. Their oxygen transfer efficiency far exceeds that of traditional aeration methods (which typically range from only 1% to 20%), allowing for a rapid increase in the water body's dissolved oxygen (DO) levels—potentially even surpassing conventional saturation limits.

4. Strong Oxidizing Properties: Release of Free Radicals Upon Collapse

As ultrafine bubbles contract, the charge density within their electrical double layer increases. At the precise moment of collapse, they release reactive species—such as hydroxyl radicals (·OH)—which can gently oxidize and decompose organic matter, disrupt algal cells, and eliminate pathogens. This enables deep water purification without the use of chemical reagents, while also effectively degrading persistent pollutants such as pesticide residues and dyes.

III. The Multifaceted Functional Value of Ultrafine Bubbles

Leveraging their four core characteristics, ultrafine bubbles fulfill a multitude of critical roles within various water treatment scenarios:

● Enhanced Oxidation and Purification: Degrades organic pollutants, eliminates odors, removes iron and manganese, and improves water clarity.

● Membrane Fouling Inhibition: Loosens contaminants adhering to membrane surfaces and prevents the compaction of filter cake layers, thereby extending cleaning cycles and boosting membrane flux.

● Scale Prevention and Equipment Protection: Inhibits surface scaling and dislodges biofilms, enhancing the heat exchange efficiency of circulating water systems.

● Efficient Solid-Liquid Separation: Adsorbs positively charged contaminants—such as fats, oils, and colloids—thereby intensifying the effectiveness of air flotation and flocculation processes.

● Ecological Restoration: Rapidly elevates DO levels, eliminates algae, and improves the condition of bottom sediments, thereby facilitating the remediation of black and malodorous water bodies.

IV. Product Advantages of the JMFILTEC Ultra-fine Bubble Generator

JMFILTEC ultra-fine bubble generator features a modular design, making it adaptable to a wide variety of water treatment scenarios:

● Flexible Installation: Supports both standalone and skid-mounted configurations, allowing for rapid integration into both new and existing systems.

● Convenient O&M: Equipped with remote monitoring capabilities; installation and routine maintenance are simple, and system retrofitting is hassle-free.

● High-Concentration Output: Reliably generates ultra-fine bubbles at high concentrations, reaching levels exceeding 2.8 × 10⁷ bubbles/mL.

V. Typical Application Scenarios

1. Industrial Wastewater Pre-treatment

When combined with coagulation and air flotation processes, it enhances the removal of oil and suspended solids, thereby boosting the efficiency of downstream treatment stages. When paired with silicon carbide (SiC) ceramic membranes, it effectively inhibits membrane fouling and ensures stable system operation.

2. Circulating Water System Scale Prevention

Applied to equipment such as cooling towers and heat exchangers, it inhibits scale formation and biofilm adhesion, improves heat transfer efficiency, enables online descaling (without system shutdown), and extends equipment service life.

3. River and Lake Ecological Restoration

Rapidly increases dissolved oxygen (DO) levels in the water body, eliminates algae, improves sediment quality, and mitigates the risk of eutrophication, thereby facilitating the remediation of malodorous black water bodies and ecological restoration.

4. Enhanced Biochemical Treatment

Removes surfactants, boosts the efficiency of aeration systems, and reduces energy consumption within biochemical treatment systems; simultaneously, it neutralizes substances toxic to microorganisms, thereby enhancing overall treatment stability.

Conclusion

JMFILTEC ultra-fine bubble generator leverages cutting-edge micro-technologies to break through traditional bottlenecks in water treatment efficiency. By integrating functions such as oxygen enrichment, oxidation, contaminant removal, membrane fouling inhibition, scale prevention, and ecological restoration, it delivers a truly efficient, energy-saving, eco-friendly, and stable system upgrade.

If you are interested in further details regarding the technical specifications, product selection options, or other aspects of our ultra-fine bubble generator, we invite you to contact us for a detailed consultation. JMFILTEC is ready to provide you with a professional, customized solution tailored to your specific needs.