RMA QA AERATORS & MIXING UNITSMICRO-BUBBLE

GENERATOR HEADS INDUSTRIAL FLOATING

VERSION

• Highly efficient dissolved oxygen transfer device• Highly efficient macro-, micro- and nano-bubble generation• Strong water circulation and disinfection

RMA QAMicrobubble generator and mixer

N.B. picture shows cut off water outlets for demonstration only, in practice they extend below the water surface

RMA QA in operation at Queensland testing facility with 22km/h water injection velocity driving water circulation in an aeration tank.

Aggregation of fine particles (fat, grease, oil and solids) on the surface of a river in China

Simple stainless steel frame supported in water by long-life,

marine grade buoys, resistant to bio-fouling and UV and will float if shot

at.

Reparator’s microbubble generator stainless steel heads produces a macro- and micro-bubble cloud

Micro-bubbles collapse into nano-bubbles and are stored in the water for up to 6 months

Sulzer submersible pump with Contrablock impeller for improved rag handling and blockage resistance

Up to 100,000 hour bearing life

Stainless steel protective screen

mesh

At least 700 mm clearance

Features• Highly efficient with SOTR of 5 kg O2 /

kWh and low energy consumption

• Creation of a bank of stored air nanobubbles that amplifies the growth of microbial populations which breakdown organic matter

• Water is injected at 22 km/h and strongly circulated horizontally and vertically as a macrobubble (>1mm) and microbubble (1 – 100 micron) cloud for destratification

• Macrobubbles coalesce and rise rapidly to breakup biomass and increase the digestible surface area.

Reparator generators filling a tank with microbubbles at a testing facility

• Microbubbles appear as a milky white solution (pictured left) and the increase in turbidity coupled with adequate water mixing create an environment resistant to algal blooms

• Microbubbles increase in negative zeta potential (electrical charge) as they shrink with decreasing levels of dissolved oxygen in water due to adsorbed hydroxyl ions

• The strong negative surface charge of microbubbles allow them to adsorb to pollutants and neutralise their charge, causing coagulation and flocculation of suspended solids, fats, oils, grease and other chemicals

• Microbubbles rise very slowly at 20 cm/h and possess a large interfacial area which both contribute to large oxygen dissolution

• When microbubbles collapse they generate nanobubbles which stay suspended in the water due to their low buoyancy and disperse throughout the entire waterbody through Brownian motion

• Nanobubbles implode with high pressure and temperature (over 3,000 degrees C) to rupture the cell walls of any adsorbed pathogens and easily dissolve oxygen into water

• The implosion process increases the oxidation potential by up to 200 mV which oxidises dissolved chemicals, transitional and heavy metals (Iron, Manganese, Calcium and others)

• The nanobubble collapse generates OH- and O- free radicals as well as hydrogen peroxide to sterilise the water

Moree Plains Shire Council, New South WalesAerobic treatment in the first tertiary pond - Moree Plains Sewage Treatment Plant

• BOD decreased by 71%• SS decreased by 10%• Ammonia decreased by

87%• O & G decreased by 37%• Malodour totally

eliminated• Turbidity TBA• Increased wildlife and

aesthetic acknowledged by shire and community members

Monitoring of data available:http://www.mpsc.nsw.gov.au/index.php/home/waste/epa-monitoring

Acknowledgement: Moree Plains Shire Council Tertiary Wastewater Pond

Riddells Creek, VictoriaManagement of blue-green algae in the Sewage Treatment Plant

• Before: 1.256 million Blue Green Algae count

• One Early Version Unit commissioned

• After: < 80

Water Treatment• Pre-treatment for irrigation systems• Pre-treatment for reverse osmosis plants • Pre-treatment for drinking water supply• Aerobic treatment of stormwater • Lake, river and polluted waterway remediation• Destratification of dams, reservoirs and large

waterbodies• Aeration for all forms of aquaculture

Wastewater Treatment• Municipal leachate treatment• Dissolved air floatation• Wastewater or sewage treatment plant aeration

systems• Industrial food process effluent ponds

Applications for RMA QA – Microbubble Generator & Mixer