Chemical oxygen demand (COD) and total suspended solids (TSS), fat, oil and grease (FOG) are very high in waste water of processing companies. Often conventional wastewater treatment methods do not clean the wastewater sufficiently to fulfil regional requirements for indirect discharge or further treatment.
A German engineering company offers to integrate a microflotation technology into the wastewater treatment concept of industrial companies.
The technology offers indirect dischargers to secure the limit values and minimise the massive polluter surcharges. In the case of direct dischargers, biological treatment stages can be relieved to the maximum and operated in a much more stable manner. The technology protects, e.g. aerobic and anaerobic processes and it can be used to preserve membrane bioreactor (MBR) or moving bed bioreactor (MBBR) plants.
Microflotation is a further technological development of classical dissolved air flotation. Microflotation produces monodisperse distributed micro air bubbles of the size class 30-50µm to float the activated sludge stably. >90% of the microbubbles are within this size range. Besides air, all industrial gases can be used as microflotation gas.
The microbubble density enables high TS concentrations in the separated sludge. The separated flotation sludge can be disposed of in biogas plants without further treatment and used for energy production. At the same time, the system enables low TSS concentrations in the clear running of the plants.
The patented technology is furthermore equipped with a self-cleaning mechanism allowing maintenance-free operation.
The method works mostly physically. In some applications an integrated dosing control mechanism ensures that individual wastewater-adjusted dosing of chemicals is carried out.
Operation at reference plants shows that depending on the feed wastewater chemical oxygen demand (COD), biochemical oxygen demand after five days (BOD5) and nitrogen values could be reduced by up to 30-70%. Almost 100% of TSS, fats and oils can be separated. At the reference plants 1-200m³/h are being treated. In principle, each wastewater problem must be considered individually. Pilot tests can determine guaranteed operating costs and limit values. The company has containerised mobile technical plants that can be used for this purpose.
Industrial companies interested in adjusting and integrating the technology in their wastewater treatment processes with the support of the German company are sought for commercial agreements with technical assistance. Licensees, who could act as general contractors, are sought for defined areas of application or regions.