Biogas production from sugar rich waste
Latvia University of Agriculture, Faculty of Engineering, Institute of Energetics, Cakstes blvd 5, LV 3001 Jelgava, Latvia;
56 biogas plants are working today in Latvia. There is need to investigate the suitability of various biomasses for energy production. Sweets production factories by-products are organic waste and wastewater featuring a high sugar content. Wastewater have a high chemical oxygen demand (COD) level and requires special treatment that results in additional input of energy and financial resources.
This article shows the results of two studies evaluating sugar-containing biomass suitability for the production of biogas.
The anaerobic digestion process of damaged jam and sweets factory wastewater was investigated for biogas production in 0.75 L digesters, operated in batch mode at temperature 38 ± 0.1 °C. The average biogas yield per unit of organic dry matter (ODM) from digestion of damaged jam was 1.114 L g-1ODM and methane yield was 0.716 L g-1ODM. Average biogas yield from digestion of sweets production factory wastewater was 1.058 L g-1ODM and methane yield was 0.663 L g-1ODM. All investigated sugar rich wastes can be utilised for biogas production successfully thus providing an environmental solution for wastewater problem of sweets production factories.
anaerobic digestion, biogas, methane, sugar rich wastes