title: [Biotransformation of nitrogen-containing compounds in the process of the continuous final purification of effluents from swine-breeding farms by immobilized cells].
abstract: After their two-step purification in aeration tanks, effluents from a swine-breeding farm were subjected to final purification in a flow bioreactor with immobilized cells derived from activated sludge. The dynamics of nitrogen compounds were studied at the reactor inlet and outlet at three flow rates. The use of a simple mathematical model of the nitrogen balance allowed the rates of nitrogen assimilation-mineralization two nitrification stages, and nitrogen fixation-denitrification to be estimated. The first stage of nitrification was found to proceed intensely and produce high nitrite concentrations (up to 100 mg N/l, accounting for about half of the total N at the inlet). The second nitrification stage was inhibited, and nitrate was only produced after 3-4 weeks of continuous operation. The strategy of the final purification of effluents from nitrogen compounds is discussed on the basis of the known regulatory mechanisms of microbial activities in activated sludge.
authors.forename: I A
authors.initials: IA
authors.lastname: Arkhipenko
authors.forename: G A
authors.initials: GA
authors.lastname: Gusarova
authors.forename: N S
authors.initials: NS
authors.lastname: Panikov
mesh_terms: D000822:Animal Husbandry; D000818:Animals; D001711:Biotransformation; D018914:Cells, Immobilized; D009566:Nitrates / Q000493:pharmacokinetics; D009573:Nitrites / Q000493:pharmacokinetics; D017672:Nitrogen Compounds / Q000493:pharmacokinetics*; D000644:Quaternary Ammonium Compounds / Q000493:pharmacokinetics; D016060:Sorption Detoxification; D013552:Swine; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D009566:Nitrates; D009573:Nitrites; D017672:Nitrogen Compounds; D000644:Quaternary Ammonium Compounds
vernacular_title: Biotransformatsiia azotsoderzhashchikh soedineniĭ v protsesse neprepyvnoĭ doochistki stokov svinokompleksov immobilizovannymi kletkami.