Continuous DigesterCosts & Benefits
|Parent Process: Chemical Pulping|
|Energy Savings Potential||
For Broadleaf trees, steam savings can be by 0.40 t-steam/t-pulp compared to the batch digestor. For Conifers, steam savings can be as high as 0.70 t-steam/t-pulp.
|CO2 Emission Reduction Potential|
Equipment cost of digester is about ¥3,700 million. Construction cost is estimated as ¥1,000 million approximately. If the elimination of the need for downstream process equipment for recovery of foreign matter and operating energy for such equipment, the payback time of the investment may become less than 10 years.
Continuous Digester Publications
This revised 2008 version of the publication from New Energy and Industrial Technology Development of Japan includes information on innovative Japanese technologies for energy efficiency and for the reduction of CO2 emissions.