Author/Editor		Janežič, L; Toman, MJ; Čoljan, V; Glancer, M
Title		Nitrogen removal from ammonium-rich wastewater using adapted activated sludge with selected nitrificants and denitrificants
Type		članek
Source		In: 1st world water congress of the international water association; 2000 Jul 3-7; Paris. Paris: International water association,
Publication year		2000
Volume		str. L335
Language		eng
Abstract		Nitrogen removal from wastewater from the Ihan pig farm was investigated. The wastewater contains nitrogen oncentrations up to 2000 mg/l, mainly in the form of ammonium nitrogen. For the treatment process an adapted activated sludge was used. Laboratory level tests yielded the basic parameters needed to conduct pilot plant experiments. Pilot plant experiments were performed as a discontinuous and a semi-continuous process. The whole process was carried out with increasing initial N-NH4 concentrations from 50 to 1200 mg/l. Nitrification rates increased with increasing initial N-NH4 concentrations and with continuous operation at the same initial oncentration. The experiment was stable over the whole time of operation, including the highest N-NH4 concentrations. pH influenced nitrification rates. The pH was from 6.8 to 8.5, with optimal activity at approximately 7.2. The type of pH correction agent partly influenced the nitrification rates; better results were achieved using Na2CO3, compared to NaOH.
Descriptors		SEWAGE AMMONIA WATER PURIFICATION NITROGEN BIOMASS SWINE ANIMAL HUSBANDRY SODIUM ACETATE ALCOHOL, METHYL