Re-pulping
The re-pulping process involves blending the dried pulp purchased in the market with water in a large tank, and mixing the contents to produce fibrous slurry.
Re-pulpingTechnologies & Measures
| Technology or Measure | Energy Savings Potential | CO2 Emission Reduction Potential Based on Literature | Costs | Development Status |
|---|---|---|---|---|
| Continuous Repulping | A study estimates possible energy savings upto 40% in the form of decreased pulping motor power requirements. | Capital costs are estimated around $100,000 (2006 dollars) if the existing repulper can be retrofitted. | Commercial | |
| Efficient Repulping Rotors | It has been reported that replacing an existing rotor with a new rotor that is optimized for power consumption reduces the rotor motor electricity consumption by 10 to 30%. In one US based mill, the installation of a new 500 hp high efficiency re-pulper rotor reduced electricity consumption by 23%. In another mill in Canada, tests with a high-capacity, aerodynamic, variable speed pulping rotor resulted in electricity savings of more than 50%. Projected annual savings amounted 3.9 GWh (Kramer et al., 2009. p.97). | Projected annual monetory savings in the Canadian mill due to reduced electricity consumption amounts to $193,000 (2006 dollars) (Kramer et al., 2009. p.97). | Commercial |