Anaerobic co-digestion of lipid-spent Botryococcus braunii (LSBB) with waste activated sludge (WAS) and glycerol was studied. Different co-digestion mixtures were assessed in biochemical methane potential tests, performed at mesophilic temperature (35oC). The experimental methane yields obtained were compared to theoretical values calculated from the methane individual yields. No significant in...

Fish wastes have great potential as a source of high valued organic carbon for methane production but also have limitation (high content of ammonia nitrogen). Anaerobic treatment of fish wastes is possible with co-digestion. The main issue for co-digestion process lies in balancing several parameters in the co-substrate mixture: macroand micronutrients, C:N ratio, pH, toxic compounds, biodegrad...

BACKGROUND This study aims to chemically characterize thin stillage derived from lignocellulosic biomass distillation residues in terms of organic strength, nutrient, and mineral content. The feasibility of performing anaerobic digestion on these stillages at mesophilic (40 °C) and thermophilic (55 °C) temperatures to produce methane was demonstrated. The microbial communities involved were fur...

Future energy and environmental issues are the major driving force towards increased global utilization of biomass, especially in developing countries like Pakistan. Lignocellulosic residues abundant The present study investigated best-mixed proportion mechanically pretreated lignocellulosic i.e., wheat straw rice (WSRS), bagasse (BAWS), bagasse, (BARS), straw, (BAWSRS) through anaerobic co-dig...

Plant waste (PW) and excess sludge (ES) are two main organic matters of municipal solid waste. However, there few reports on their anaerobic co-digestion. In this work, the mixed proportion PW ES co-digestion was first optimized at mesophilic temperature, then enhanced with strong oxidant calcium peroxide (CP). The results showed that optimal mixing ratio 1/1 (in terms volatile solids), C/N dig...

Purpose: A trace element supplementation strategy previously shown to be effective in mesophilic conditions was tested for thermophilic digestion of source segregated domestic food waste. Method: Inoculum from a mesophilic anaerobic digester treating municipal wastewater biosolids was successfully acclimated to thermophilic temperature (55 o C) with food waste as a substrate. Four laboratory-sc...

Mr. Don Walter should be commended for his technical paper dealing with the real-world problems of preparing anaerobic digester feeds from a difficult raw material, municipal solid waste (MSW). The information presented in the paper is not readily available in the published litera­ ture, and will be valuable to engineers interested in MSW processing and digestion. The author discusses some of t...

• Assessment of bioplastic degradation during mesophilic treatments at pilot scale. Bioplastics degraded by 17 % and 30 total solids after AD plus composting. Compost showed high content (18 TS) did not meet legal limits. Starch-based bioplastics degrades faster than polylactic acid polymer in soil. soil degrade completely 8–9 years according to calculated kinetic. The aim the study was assess ...

The present experiment was carried out to determine the digestion kinetics of carbohydrate fractions of citrus by-products. Grapefruit pulp (GP), lemon pulp (LE), lime pulp (LI) and orange pulp (OP) were the test feed. Digestion kinetic of whole citrus by-products and neutral detergent fiber (NDF) fraction and acid detergent fiber (ADF) fractions of citrus by-products were measured using the <e...