Abstract:
For heating tunnel horticultural greenhouses in cold season applies
the concept CHAB (Combined Heat And Biochar production) which
synergistically incorporating thermal energy and biochar production from
biomass gasified with TLUD process that produces fuel gas and 12..15 %
biochar. Biochar is a vegetal active carbon, sterile, pH > 9 and a high
adsorption capacity, used as agricultural amendment and carbon sequestration.
Sold with 400...1000 €/t can get zero or negative costs for heat produced.
Simulate experiments were performed to a model of the 200 m2 tunnel
greenhouses are grown tomatoes. For heating in four cold months consumed 13
t chopped and dried tomato stalks and resulting 1.8 t biochar which
incorporated in the ground leads to a negative balance of -6.34 t.CO2/year.
Average daily cost for fuel is 5,91 €/day without a biochar recovery and -4.78
€/day for a biochar recovery with price of 680 €/t in EU.
