Table 4. Energy balance for a self-sufficient process, for configurations, boiler and gas engine.

Thermal energy^a

Electrical output, kW

%TS^b

kWh/day

kW

 Boiler

 (A) Mixed sludge

76.592

3.191

-

4,4%

 (B) 1º non-hydrol + 2º hydrol

70.904

2.954

-

2,9%

 Gas engine

 (A) Mixed sludge

30.779

1.282

1.181

10,8%

 (B) 1º non-hydrol + 2º hydrol

28.493

1.187

1.093

7%

^a Energy involved in the production of the steam needed for the process.
^b Sludge concentration for a self-sufficient process.