# Bagasse and black-liquor cogeneration: Overview

How sugar and paper mills power themselves on their own leftovers

Source page: https://www.materialinsights.org/energy/e_bio_cogen/overview/

What this tile covers Sugar and paper mills burning their own residues for steam and power. Share of use 0.4% share of final energy use supplied (2020)

Share of world final energy use (about 435 EJ, the same denominator as Conversion and use) supplied by recovered or reused energy, where a global figure exists; most methods have no global total and are left null Black liquor alone: about 170 Mt dry solids holding about 2 EJ a year, at an assumed 80% overall cogeneration efficiency (IRENA and ETIP give 70-90% for biomass CHP), about 1.6 EJ useful (calculated). Bagasse not included, so a lower bound. About 1.6 EJ a year, divided by world final energy use of about 435 EJ (calculated). Source: [Black liquor (technology description)](https://www.ctc-n.org/technologies/black-liquor), Climate Technology Centre and Network (UNEP/UNIDO).

#### Key facts

| **Heat grade** | Process heat |
|---|---|

#### Included from the reference tables

- Bagasse cogeneration
- Black liquor recovery boilers
- Back-pressure steam turbines

#### Linked to the material world
[Su Sugar](https://www.materialinsights.org/commodities/sugar/)[Tm Timber](https://www.materialinsights.org/commodities/lumber/)

#### Also in Heat to power and cogeneration
[WHR Waste-heat power (steam Rankine)](https://www.materialinsights.org/energy/e_whr_rankine/)[ORC Organic Rankine, Kalina and sCO2 cycles](https://www.materialinsights.org/energy/e_orc/)[Trb Engine exhaust recovery](https://www.materialinsights.org/energy/e_engine_recovery/)[CHP Combined heat and power](https://www.materialinsights.org/energy/e_chp/)[CDQ Steel plant energy recovery](https://www.materialinsights.org/energy/e_steel_recovery/)

Explore paths from here
 More on this tile in the tabs above: science and thermodynamics, engineering and integration, economics and contracts, impact and additionality, what to track.

## Other sections

- [Summary](https://www.materialinsights.org/energy/e_bio_cogen/index.md)
- [Correlation](https://www.materialinsights.org/energy/e_bio_cogen/correlation/index.md)
- [Science and thermodynamics](https://www.materialinsights.org/energy/e_bio_cogen/rc-sci/index.md)
- [Engineering and integration](https://www.materialinsights.org/energy/e_bio_cogen/rc-eng/index.md)
- [Economics and contracts](https://www.materialinsights.org/energy/e_bio_cogen/rc-econ/index.md)
- [Impact and additionality](https://www.materialinsights.org/energy/e_bio_cogen/rc-impact/index.md)
- [What to track](https://www.materialinsights.org/energy/e_bio_cogen/tracking/index.md)
- [Relationships](https://www.materialinsights.org/energy/e_bio_cogen/links/index.md)