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The oxygen advantage
The best way to prevent sulfurous corrosion and offensive odours in anaerobic bacterial processes is to add a little pure oxygen to the flow. Foul odours and corrosion problems at receiving works, primary treatment tanks, pressurised mains and reception tanks are often due to natural background bacteria utilising chemical-bound oxygen to produce fermentation by-products such as fatty acids, hydrogen sulfide (H2S) and other odorous compounds. Wastewater is biologically active and can benefit from oxygen enrichment prior to secondary treatment as the microorganisms that biologically purify wastewater require sufficient oxygen to thrive and effectively treat wastewater. Efficient oxygen transfer is therefore an essential component of all aerobic wastewater treatment processes.
Direct injection of pure oxygen can solve many problems in wastewater treatment by enhancing the biochemical processes in an aerobic plant. Air only contains one fifth oxygen by volume, and so adding pure oxygen proportionally increases the rate of oxygen transfer into water treatment systems and removes any limitation on oxygeb mass transfer - This ensures the microorganisms responsible for the biological treatment process perform to their maximum potential. In short, the microorganisms are in an environment where oxygen transfer matches their precise demands.
Low-cost way to increase capacity
Oxygen enables operators to increase treatment capacity without having to invest in expanding existing capacity treatment volume or new expensive aeration equipment. It is also compatible with existing equipment, often augmenting and complementing systems already in use. Using Linde's SOLVOX® oxygenation systems with existing aeration equipment can reduce foaming, lower volatile organic compound emissions, reduce excess sludge production, improve sludge settlement characteristics, manage peak loads, provide temporary aeration during maintenance and prevent odours. In addition, oxygen can potentially reduce energy consumption by allowing some of the existing aeration units to be turned down or even off.
We also deliver a range of state-of-the-art pH control solutions to meet your individual application needs. Our SOLVOCARB® B hoses, for instance, are ideal for open tanks and vessels, while our SOLVOCARB® D solution is perfect for recycled sidestream or pressurised pipes.