Rheology of Sludges. The rheology experiment in sludge properties research (M.M. Sozanski et al. ). The rheology of sewage sludge at different steps of treatment (V. Lotito et al. ). Management of Wastewater Sludges. Sludge Characterisation. Changes of some sewage sludge parameters prepared with an ultrasonic field (J. Bien, L. Wolny). Activated sludge structure during aerobic digestion (K. Barbusinski, H. Koscielniak). Sludge Minimisation. The use of ultrasound to accelerate the anaerobic digestion of sewage sludge (A. Tiehm et al. ). Anaerobic digestion and dewatering characteristics of mechanically disintegrated excess sludge (J. Kopp et al. ). Using metazoa to reduce sludge production (J.H. Rensink, W.H. Rulkens). Hygiene and Stabilization. Aerobic composting and anerobic digestion of pulp and paper mill sludges (J. Jokela et al. ). Thermal inactivation of plant seeds in sewage sludge (U. Baier). Thermal Treatment and Product Reuse. Lab-scale evaluations on formation of products of incomplete combustion in hazardous waste incineration: influence of process variables (G. Mascolo et al. ). Evaluation of thermal sludge solidification (N. Okuno et al. ). Agricultural Utilization. Strategy for land application of sewage sludge in Norway (B. Paulsrud, K.T. Nedland). Development of sludge treatment and disposal strategies for large conurbations: case study - Warsaw (J.E. Hall, A. Zymslowska).