Sludge and Waste Management

Reduce, Reuse, Recycle, Valorize
“There is no such thing “Away”. When we throw anything away, it must go somewhere.”, Annie Leonard

In all likelihood, the management of solid and liquid wastes, inclusive WWTP‘s sludge, will become one of the most important environmental problems of the 21st Century. The biological refining and resource recovery approaches to extract value added products and nutrients from sludge and control options for metal elements and micro-pollutants in sewage sludge, as well as recovery of enzymes, bio-plastics, bio-pesticides, proteins and phosphorus are discussed as a means to visualize sludge as a potential opportunity instead of a nuisance. Because of that, a major priority is thus to develop new strategies for the reduction, reuse, recycling, and valorization of this waste in order to reduce its negative impact on the environment. These provide opportunities, but at the same time, given the nature of the material and obstacles that may exist, require that responsible and proven practices are followed.
Starting with sludge and waste characterization, as well as available reuse options, we provide complete design services for their treatment and management with minimal cost (waste-to-energy approach), options for beneficial reuse, the costs of implementing those options and programs to reuse them.


Communal and Industrial Sludge Treatment
  • Sludge reduction
  • Sludge disposal
  • Sludge to energy
  • Sludge management
Sludge Treatment Processes
  • Gravity and mechanical thickening
  • Anaerobic sludge stabilisation (digestion) with bio gas treatment
  • Bio gas power generation by CHP
  • Aerobic sludge stabilization
  • Sludge reception and storage facilities
  • Sludge dewatering
  • Sludge drying
  • Sludge incineration with heat recovery facilities
  • Power generation from incineration process


Waste management services
  • Planning and policy advice
  • Project identification and feasibility studies
  • Resource efficiency