DRIED SEWAGE SLUDGE IN,
RENEWABLE PHOSPHORUS FERTILIZER OUT

It’s almost as simple. But, sewage sludge from different WWTP varies significantly. Based on the individual sludge analysis we are able to make a first assesment of the potential fertilizer quality. Together with an evaluation how the PYREG technology can ideally be integrated into the existing material and energy cycles.

THE ASSESMENT FOCUSES ON THE CORRESPONDING ANALYSIS AND THE FOLLOWING PARAMETERS

  • The annual sludge volume
  • Concentration of heavy metals and other contaminants
  • Content of dry substance‚Ä® (necessary are min. 80%)
  • Additional sludge treatment like dewatering and/or drying (to be designed or already in place)

RELEVANT PARAMETERS OF A PYREG UNIT

  • PYREG Unit l:9000 x w:3000 x h:2800 mm
  • Container for flue gas treatment l:6000 x w:3000 x h:2800 mm

  • Maximum Energy Input 500 kW
  • Annual Throughput Up to 1,400 t/a dried sewage sludge with a calorific value of 10 MJ/kg
  • Yearly Production Up to 500 t P-Fertilizer with 10 to 20 % phosphorus
  • Excess Thermal Energy Up to 150 kWth, to be used for drying of sewage sludge

PROFITABILITY OF PYREG PROCESS

A PYREG®-system works extremely economically. Only a small amount of initial energy is necessary for the start-up of the system. When the process is set in motion, the PYREG® plant produces its own heat while operating. In addition, the available energy quotas can be used for drying or other peripheral use and provide maximum flexibility.

Sources of income:

  • Revenues generated from acquiring Biomass
  • Recovery of the excess thermal energy
  • Marketing of the mineralization good (biochar or sewage sludge ash)

Other economic benefits effects:

  • Reduction of transport costs through decentralized recovery
  • Reduced space requirements, handling costs, administrative expenses, etc.
  • Self-control and utilization- instead of foreign exploitation: Decoupling of market price trends
  • Avoid otherwise investments (eg composting)
  • Long term disposal reliability even when laws become more strict