A growing global population is increasing the demand for food and clean water. Our freshwater supplies are diminishing and at the same time our wastewater is increasing. Currently we cannot sustain our own development on a global scale. The increase in flow and organic loading of our wastewaters, means there is a need to treat water more efficiently. Stringent environmental laws regarding drinking and wastewater demand higher qulaity and more sustainable treatment technologies. Nutrient enrichment is a common factor affecting water quality. Untreated water can contain high levels of COD, phosphorus and nitrogen. If water is released into the environment or supplied to the public with without appropriate treatment, it can lead to severe eutrophication, oxygen consumption, …show more content…
MBBR processes retain a large volume of biofilm within the biological wastewater treatment process. As a result, degradation of biodegradable contaminants are sustained in highly compact tank sizes. Without the requirement to return sludge, the process provides increased protection against toxic shock, while automatically adjusting to load fluctuations. OM removal has been investigated further, including high-rate pre-treatment for upgrading of activated sludge plants.
Kermani M., et al (2008) conducted the study to evaluate the organics, phosphorus and nutrients removal from synthetic wastewater by a MBBR at a laboratory scale size. The study showed that MBBR can be used for the nutrient removal from municipal waste and is as an ultimate and efficient option. Almost complete organic and nutrient removal was observed. Average soluble COD and TN removal efficiencies were at 96.9% and 84.6%, when carried out during optimum operating conditions. This proved that the MBBR was a very effective and efficient