Kinetic study and optimization of total solids for anaerobic digestion of kitchen waste: Bangladesh perspective

Abstract

Kitchen waste from hotels and homes is one of the major problems for urban and rural environment and could be one of the best sources of renewable energy by producing biogas through anaerobic digestion. A research work was undertaken to assess the methane potential of kitchen waste at different total solids (TS) content. Kitchen wastes such as spoiled rice, brinjal, potato, papaya, tomato, fish and poultry parts etc., which are easily decomposed were selected for this study. Batch experiments were set up under ambient temperature. Kitchen waste was added in the batch digester at different TS content (5, 7, 10, 12 and 15%) and sealed for 146 days until the gas production stopped. Substrate characteristics were analyzed before and after the anaerobic digestion. The highest methane yield was 78.12 L/kg VS at 15% TS content followed by 12, 10, 7 and 5%. Different kinetic parameters were determined using logistic model and the model showed a good fit with the experimental results. After modelling using Minitab®, the optimum TS content for kitchen waste was found to be 14.90%.

Solid‐Liquid separation through sieve mesh for enhancing biogas production in a swine farm

“…The amount of biogas generated in an AD system is highly dependent on the main feedstock's physiochemical parameters, such as total and volatile solids, carbon/nitrogen (C/N) ratio, temperature, and inhibitory compounds 39,40 . The term “TS” thus refers to the total amount of organic and inorganic matter in a primary feedstock 41 .…”

“…The amount of biogas generated in an AD system is highly dependent on the main feedstock's physiochemical parameters, such as total and volatile solids, carbon/ nitrogen (C/N) ratio, temperature, and inhibitory compounds. 39,40 The term "TS" thus refers to the total amount of organic and inorganic matter in a primary feedstock. 41 According to the amount of TS in the raw slurry (>20%-40%), an AD system is categorized as a dry AD, whereas a liquid separated sample (<10%-20%) is classed as wet AD.…”

Effects of Seasonal Temperature Variation on Slurry Temperature and Biogas Composition of a Commercial Fixed-Dome Anaerobic Digester Used in Bangladesh

“…The collected samples were brought to the Green Energy Knowledge Hub (GEKH) laboratory at Bangladesh Agricultural University (BAU) for physical and chemical analyses. The total solids (TS) and volatile solids (VS) were determined using the following standard [26], as described by Nasrin et al [27]. For drying and combustion of samples for TS and VS evaluation, a heating oven (UN30, Memmert, Schwabach, Germany) and a muffle furnace (LE 14/11/ B 150, Nabertherm, Lilienthal, Germany) were used.…”

Techno-economic and environmental analysis of organic municipal solid waste for energy production

“…Some researchers studied biogas generation from cattle feedstock, poultry feedstock and rice straw bedding [ 16 , 17 ]. In contrast, another group of researchers optimized the total solid in kitchen waste to implement an efficient AD process [ 18 ]. Researchers in Ref.…”