title: Kinetic study of compost liquor nitrification.
abstract: This study is a first kinetic approach about the compost liquor treatment by activated sludge. This industrial wastewater is highly loaded in organic and nitrogen compounds (COD≈12,000 mg L(-1) and NH(4)(+)-N≈4,000 mg L(-1)). The possibility of its treatment in an urban WWTP is studied measuring ammonia oxidation rate with non-acclimated sludge to the industrial effluent. Compost liquor appears as an inhibitor substrate. The ammonia oxidation rate can be modelled by the Haldane model: U(MAX)=0.180 d(-1), K(S)=12.0 mgN.L(-1) and K(I)=26.0 mgN.L(-1). The ammonia oxidation rate also follows for a synthetic substrate which has the same pollutant load as the real substrate. In this case, the ammonia oxidation rate can be modelled by the Monod model: U(MAX)=0.073 d(-1) and K(S)=4.3 mgN.L(-1). This result confirms that the ammonia oxidising bacteria are inhibited by the real wastewater. The following-up of nitrate production shows also the inhibition of nitrite oxidising bacteria. The compost liquor treatment seems not possible in an urban WWTP (<50,000 p.e.). That's why a specific WWTP is recommended and an acclimation step of activated sludge is essential.
authors.affiliation: Université Paul Cézanne Aix Marseille III, Laboratoire de Mécanique, Modélisation et Procédés Propres, M2P2 UMR-CNRS 6181, Europôle de l'Arbois, BP 80, Bâtiment Laennec, Hall C, 13545 Aix-en-Provence Cedex 4, France.
authors.forename: J
authors.initials: J
authors.lastname: Gagnaire
authors.forename: X Y
authors.initials: XY
authors.lastname: Wang
authors.forename: L
authors.initials: L
authors.lastname: Chapon
authors.forename: P
authors.initials: P
authors.lastname: Moulin
authors.forename: B
authors.initials: B
authors.lastname: Marrot
mesh_terms: D000641:Ammonia; D001673:Biodegradation, Environmental; D058465:Nitrification; D009584:Nitrogen / Q000737:chemistry / Q000378:metabolism*; D010084:Oxidation-Reduction; D012037:Refuse Disposal / Q000379:methods*; D012722:Sewage; D012987:Soil / Q000737:chemistry*; D013997:Time Factors; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry
chemical_list: D012722:Sewage; D012987:Soil; D014874:Water Pollutants, Chemical; D000641:Ammonia; D009584:Nitrogen