KONTINUERLIGA VARNINGSSYSTEM FÖR FÖREKOMST AV NITRIFIKATIONSHÄMMANDE ÄMNEN I AVLOPP / Warning Systems for the Presence of Nitrification Inhibiting Compounds in Wastewater
The presence of compounds inhibitory to nitrification in sewage treatment is a severe problem when introducing biological nitrogen removal at municipal treatment plants. These compounds often have their origin in industrial wastewaters connected to the municipal sewage works. One way to decrease the risk for inhibition of the nitrifying microflora in the treatment plant is to introduce early warning systems for the presence of toxic compounds at the industries, so that the discharge of the industrial wastewater can be stopped when it contains toxic compounds. In this article, the principles and limitations of existing warning systems are discussed and a new principle for a warning system especially designed for toxicity against nitrifying bacteria is presented, together with some results from the initial tests with this system. The system is based on the cultivation of nitrifying bacteria in the lab, followed by immobilization of the bacteria in polymer beads, e.g. alginate beads. “Complete abstract not presented.”