Wastewater treatment plants that make use of aeration processes commonly experience challenges such as inadequate purification and rancid odours caused by anaerobic decomposition – this is a direct result of insufficient dissolved oxygen levels in the water.
The systematic introduction of pure oxygen at critical points along the wastewater process chain can help solve these issues more effectively than industry-standard aeration alone, ensuring greater efficiency and operational flexibility.
Sub-Saharan gas market leader Afrox boasts a range of SOLVOX® solutions that improve wastewater treatment plant performance without the need for costly construction or restructuring work. Often these solutions can be implemented without taking out plant capacity during the installation phase.
The SOLVOX® system has been designed to transfer oxygen and disperse dissolved oxygen to all areas of the aeration basin or tank. This results in improvements in overloaded activated sludge plants, as more wastewater throughput can be treated, thereby improving the plant’s overall treatment performance. This effect is supported by the decreased sludge load, as the plant can support more biomass per unit of volume. As a result, effluent from the wastewater treatment plant has lower and more consistent biological oxygen demand (BOD5) and chemical oxygen demand (COD) concentrations.
The use of pure oxygen can also reduce the production of foaming and volatile organic compound (VOC) emissions caused by excess off-gas from traditional air-based systems. In certain situations SOLVOX® solutions require no additional energy source to transfer oxygen into activated sludge tanks or lagoons, as there is sufficient agitation provided by the existing aeration equipment.