Maintaining Constant 28 C temperature in anaerobic digester 2

[guruji135]

Hi, I am working on a bi-phesic MB-HRAR (moving bed, high rate anaerobic reactor)for biogas generation with cattle dung as feed. I need to maintain constant temperature of 28 C in the reactor. It would require both heating/cooling system as from season to season, temperature varies between 7 C to 44 C. Presently the model is made up of acrylic, but if jacketed vessels of any other material is found suitable, I will change the set up. Kindly suggest solution. What is temperature circuit? Can it be helpful here?

 

[zekeman]

Heatpump

 

[Compositepro]

Where a lot of heat is generated you must have good god mixing and high flow rates to maintain a uniform temperature. Moving bed implies you are dealing with solid materials. That makes heat transfer much more difficult. Most digesters operate on liquids which makes mixing and temperature control much easier.

 

[hacksaw]

With a bio reactor setup you will not be able to control temperture as an independent variable.

What you can do is monitor the temperature at several points in the bed and adjust the feed and draw off rates.

Forget jacketed tanks, too expensive, too much maintenance. Concrete tanks work fine.