title: Improvement of dairy manufacture effluent anaerobic digestion with biological waste addition using a Chinese dome digester.
abstract: Anaerobic co-digestion of dairy manufacture effluent (DME) and biological waste (BW) was investigated at various DME/BW ratios using laboratory batch digesters. The biogas yield ranged 0.34-0.88l biogas g(-1) volatile solids (VS) removed. The highest VS reductions of 58% and 62% were obtained for DME/BW ratios of 60:40% and 80:20%, respectively. Results were used to operate a pilot-scale digester of 5m(3). The highest biogas yield of 0.48lg(-1) VS removed was obtained at an organic loading rate (OLR) of 1.64gVSl(-1)d(-1) corresponding to a DME/BW ratio of 80:20%. This could be mainly attributed to the higher biodegradability of DME and the correction of the C:N ratio by the addition of the BW. The N, P and K contents were increased significantly in the TS of the digestate to be around 6.8%, 0.64% and 1.26%, respectively.
authors.affiliation: UR-Biodiversity and Biology of Populations, High Institute of Applied Biological Sciences, Street of Zouheir ESSAFI 1007 Tunis, Tunisia.
authors.forename: Toumi
authors.initials: T
authors.lastname: Jihen
authors.forename: Bouallagui
authors.initials: B
authors.lastname: Hassib
authors.forename: Hamdi
authors.initials: H
authors.lastname: Moktar
authors.forename: Nouira
authors.initials: N
authors.lastname: Said
mesh_terms: D000468:Alkalies; D000693:Anaerobiosis; D002681:China; D003612:Dairying; D006863:Hydrogen-Ion Concentration; D010865:Pilot Projects
chemical_list: D000468:Alkalies