Nitrate removal of water and wastewater by solid phase denitrification

Years ago nitrate pollution in water and soil has been a major concern in the world's environmental issues. Nitrogen-containing compounds in the environment can cause new problems, such as river eutrofication and a dangerous disease called methemoglobinemia and other disorders in human health. One of the most important wastewater treatment goals is the removal of nitrogen, which is carried out by chemical, physical and biological processes that biological methods of nitrogen removal are more efficient and economical. Nitrification is one of the main processes for the removal of nitrate in water, a process that requires no oxygen, in which bacteria use from nitrate as an electron receiver to obtain energy for growth. Solid-phase denitrification process is an emerging technology which has received increasing attention in recent years. It uses biodegradable polymers as both the carbon source and biofilm carrier for denitrifying microorganisms this process is a promising technology for the removal of nitrate from water and wastewater. In the future, more attention can be devoted to the simultaneous removal of nitrate and other pollutants from water by Solid-phase denitrification, thereby ensuring the health of the environment and human.