Water Recovery Systems for Flue Cured Tobacco Barns
NineSigma, representing a global tobacco company invites proposals from organizations and researchers for technologies which target water recovery from the exhaust airstream of flue cured tobacco curing (drying) barns.
NineSigma’s client is a global tobacco company who are leading the sector in terms of sustainability and, in particular, water stewardship.
Currently, tobacco leaves are cured in large barns close to the fields over a period of up to 7 days. During this time, temperature is gradually increased from around 35 to 70ºC and consequently the moisture of the leaves is reduced from 85% down to 15% ca. Water is evaporated from tobacco during the curing and it is discharged as vapour in the exhaust air stream.
NineSigma's client would like to improve their water sustainability profile and are seeking water condensing / reclamation technologies which can collect the vapour and enable the water to be utilized for other farming purposes.
The proposed technologies must be able to work in the stipulated temperature ranges and also be compatible with current power sources and NOT require major design reconstruction of the drying barns.
The ideal solution would require minimal development and be available commercially within 3 months, with the understanding that the proposed technology may require a short development cycle.
Key Success Criteria
Temperature of the exhaust airstream range: 35 - 70ºC
Temperature is ramped up over 7 days
Highest water recovery rates between 3 - 5 days
Power source compatible (i.e. modular) with onsite power sources
LPG, biomass, natural gas, diesel
Theoretical water recovery of ca 7m3 per barn per drying cycle
Technology must be at POC or prototyping stage
Water reclamation technologies
High capacity systems
Water extraction based on adsorption / desorption
Water extraction using biomimetics
Condensation phenomenon (cooling of air)
Heat exchangers, evaporators, condensers
Items to be Submitted
Your response should contain only non-confidential information and address the following:
Overview of the proposed technology (principle, characteristics and intended use)
Uniqueness of the proposed technology
Development stage (concept level / performance verified on laboratory level / already implemented for practical use)
Applicable temperature and humidity conditions
Amount of water to be extracted
Application result to a water extraction system
Development plans and estimated costs to meet the ultimate requirements