Integration of technologies : biogas production, fertilizer production and biogas upgradingSokk, Olev; Loigu, Enn; Kuusik, Rein, keemik; Menert, Anne12th World Congress on Anaerobic Digestion : October 31st - November 4th, 2010, Guadalajara, Jalisco, Mexico2010 / [6] p : ill Use of two-stage anaerobic treatment for distillery wasteBlonskaja, Viktoria; Menert, Anne; Vilu, RaivoSludge management entering the 3rd millennium : industrial, combined, water and wastewater residues : conference proceedings, the Grand Hotel, Taipei, Taiwan, 25-28 March 20012001 / p. 166-171 : ill