Odour generation and dust in belt drying of sewage sludge
Heindl A. – HUBER SE, Waste Water Technology,
(free)
Belt drying of sewage sludge results in odour generation in the exhaust air. Odourous components and the factors influencing their concentration in exhaust air are discussed. Different components contribute on different levels to the smell produced. Typical odour treatment units for belt dryers consisting of scrubbers and bio-filters are briefly presented. A sludge drying test unit that simulates belt drying of sludge and measures components in
exhaust air is also presented. Dust is also an issue in belt drying of sewage sludge. Extruding and back mixing of sludge before drying are briefly described and their advantages and disadvantages stipulated. With regard to safety, dust development has to be limited and deposits have to be removed to follow ATEX regulations and to avoid zoning inside the dryer. Good access of the belt dryer and heat exchangers for cleaning as well as extruding of sludge before and low mechanic stress during drying are key issues.
The Biosolids conference attracts the most authoritative global experts in the area of biosolids and organic resource handling, treatment and recycling. The programme covers both the latest innovations and updates of existing technologies. Presentations from respected industry experts and newcomers follow the development of technologies and legislation from inception to full-scale installations.
The conference regularly gathers over 200 delegates from all over Europe, many of them return every year both for the technical presentations and fantastic networking opportunities.
Regular conference themes include:
• Thickening and Dewatering
• Modelling Sludge Handling and Utilisation
• Commissioning and Operating Experiences with Thermal Hydrolysis
• Tackling Potential Odour Problems
• Operating Experiences and Potential Problems in Digester Operation
• Ensuring Optimum Energy Recovery from Biogas
• Liquor Treatment and P Removal
• Alternative Products from Sludge
• Enhancing the Value of Biosolids and Digestate
• Pathogens and Pollutants In Digestate
• Sharing Experiences
