Your web browser is out of date.

Update your browser for better security, speed and to get the best experience on this website.

Update your browser

Solar dryers

Solar dryers take the form of large greenhouses into which the sludge is fed either continuously or in batches. Solar drying provides the lowest energy demand of all dryers, as low as 50 kWh/t, but incurs a large footprint due to the constraints on the available thermal energy. Although heating is provided at zero or minimal cost, energy is demanded by both the mechanical agitation of the sludge solids and deodorisation of the exhaust air. Supplementary heating, often using a waste heat source, is often needed to sustain a reasonable drying rate.

Solar dryers related videos

Solar dryer, OTEX Source: David Fang / YouTube

Solar dryer, OTEX

A video to demonstrate the principles of the OTEX solar sludge dryer.

Advert
Advert
Advert

Solar dryers features and blogs

Shutterstock 761550406
Feature

Anaerobic digestion optimization through thermal hydrolysis pre-treatment

Pre-treatment of sludge by thermal hydrolysis upstream of anaerobic digestion is used to improve AD efficiency. A study looked at (pre-)commissioning data for a full-scale AD installation undergoing upgrading with TH to assess the basis for optimisation.

Read article

More Solar dryers topics…

More process and operation topics…