The dissolved-air type micro-nano aerator utilizes the high-efficiency dissolved-air pump independently
produced by our company, which enables rapid gas fragmentation and dissolves the gas in water in the
form of micro-nano bubbles. It can be integrated with various gas generation machines such as oxygen
generators, ozone generators, and carbon dioxide generators to form an all-in-one machine, meeting the requirements of different river water quality treatment scenarios.
Dissolved Oxygen (DO) as a Critical Water Quality Indicator
Low DO concentrations (<2 mg/L) impair aerobic degradation of organic pollutants, triggering anaerobic microbial degradation. This process generates malodorous gases methane (CH?), hydrogen sulfide (H?S),mercaptans (RSH), and ammonia (NH?) causing putrefaction and foul odors.
Beyond sustaining obligate aerobic organisms, DO levels directly regulate aquatic viability:
Beyond sustaining obligate aerobic organisms, DO levels directly regulate aquatic viability:
Optimal range: 5-7 mg/L → Supports fish/shrimp reproduction
Stress threshold: <2 mg/L → Cessation of piscine feeding
Lethal condition: <1.3 mg/L → Shrimp suffocation
Consequently, DO enhancement constitutes the cornerstone of urban river remediation.
Micro-Nano Bubble Aeration: Technological Superiority
This next-generation oxygenation system delivers unparalleled advantages over conventional aerators:
1. Accelerated Oxygen Transfer & Self-Purification
Achieves >85% oxygen transfer efficiency (OTE)
Maintains perpetual aerobic conditions for microbial metabolism
Amplifies biochemical oxygen demand (BOD) removal by 200-300%
2. Sediment-Water Interface Transformation
Establishes facultative anaerobic microzone atop benthic sediments
Enables aerobic biofilm colonization potential
Oxidizes black-odor compounds:
4H2S + 4O2 → S0 + SO42-+ 4H+（Elemental sulfur precipitation)
CH3SH + 3O2→ CO2 + SO4²- + 2H2O (Mercaptan mineralization)
3. Contaminant Sequestration Mechanisms
Forms dense sediment capping layer reducing resuspension
Suppresses phosphorus release via:
Oxidative precipitation: 4Fe²+ + O2+ 4H+ → 4Fe2++ 2H2O
Fe³++ PO4³- → FePO4↓ (Insoluble vivianite formation)
Adsorptive removal:
Colloidal Fe(OH)? flocs capture soluble reactive phosphorus (SRP) at pH ≥7
4. Hydrodynamic Enhancement
Induces beneficial turbulence improving:
Oxygen dispersion coefficients (Kla ≥15 h-¹)
Environmech Sdn. Bhd.
since 2012 Co. Reg. No: (1007069-M)
For more information or enquiry, please contact Environmech Sdn. Bhd.
Contact us: http://www.environmech.com/p/contact-us.html Website: www.Environmech.com
