BOD/COD Removal

Biochemical oxygen demand (BOD) and chemical oxygen demand (COD) are two different ways to measure how much oxygen the water will consume when it enters the recipient. In both cases the oxygen-consuming substances are mainly of organic origin. These substances should be reduced to a minimum in the wastewater treatment plant.

With chemical treatment, removal of BOD/COD is improved at basically all municipal plants. The basic principle is that the earlier in the process the chemical treatment is implemented the more efficient it is. For instance in a primary plant with mechanical separation only, a chemical treatment can improve BOD removal from about 40 per cent to 80 per cent. This result is effectively achieved without any investment costs.

If our products are used before the secondary treatment, the biological process will work more efficiently and consume less energy. Or if needed, the plant capacity can be increased without any major investments, if chemicals are used correctly. A municipal wastewater treatment plant using chemicals for BOD/COD removal will always be the most compact plant and leave the smallest possible environmental footprint.

We have not only developed a great variety of products for municipal wastewater treatment. We have actually developed the technologies and the market for chemical wastewater treatment.