[Show abstract][Hide abstract] ABSTRACT: An Anaerobic Sludge Blanket (UASB) reactor was used to study the treatment of distillery effluent. Vinasse was used to feed the reactor, although its Chemical Oxygen Demand (COD) concentration varied during the experiment, the volume utilized to feed the reactor was adjusted to maintain constant Organic Load Rate (OLR). The UASB reactor was operated with OLR 1, 2, 4 and 6 gCOD/Ld. Removal efficiencies of 76,64,63 and 51% respectively were observed. The reactor responded with progressive decreases of efficiency with each increase of OLR, the total mass removed increased. An average biogas production of 1.400, 1.872, 2.17 and 2.172 L to each OLR of 1, 2, 4 and 6 gCOD/Ld, respectively was observed. The methane content in biogas was 63, 68, 86 and 89% each OLR tested. Methane production is also followed with values of .892 L to OLR 1 gCOD/Ld, 1.264 L to OLR 2 gCOD/Ld, 1.876 L to OLR 4 gCOD/Ld and 2.900 L to OLR 6 gCOD/Ld.
The UASB reactor operating in continuous mode, it was necessary to evaluate the best conditions for this type of waste. The treatment of distillery effluents using a UASB reactor is feasible and is an alternative to treat these wastes in the alcohol industries
INTERNATIONAL JOURNAL OF MODERN ENGINEERING RESEARCH. 06/2014; 4(6):37-42.
[Show abstract][Hide abstract] ABSTRACT: Palm oil is an important edible oil in the global fats and oil market and its industry is also one of the prominent global agricultural industries. The production of crude palm oil reached 62.34 million tonnes in 2014. However, enormous volumes of production has subsequently discharged large volumes of a palm oil mill effluent (POME). POME is a remarkably contaminating effluent due to its high amount of COD, BOD and colour concentrations, which can affect the environment, especially water resources. However, it was recognized as a prospective source of renewable biogas such as biomethane and biohydrogen. Nowadays, with the global emphasis on sustainability, if we simultaneously operate wastewater treatment and produced renewable bio energy in the palm oil industry, then this industry can be environmentally sound, with cleaner production and greater sustainability. The aim of this review is to discuss various existing treatment processes (mainly anaerobic and aerobic digestion, physicochemical treatment and membrane separation) and factors that influence the treatment methods and conversion of POME to renewable biogas such as biomethane and biohydrogen on a commercial scale.
Renewable and Sustainable Energy Reviews 10/2014; 42(February):1260-1278. · 5.63 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: The idea that storage can enhance manure quality as substrate for anaerobic digestion (AD) to recover more methane is evaluated by studying storage time and temperature effects on manure composition. Volatile fatty acids (VFA) and total dissolved organics (CODs) were measured in full scale pig manure storage for a year and in multiple flasks at fixed temperatures, mainly relevant for colder climates. The CODs generation, influenced by the source of the pig manure, was highest initially (0.3 g COD L(-1)d(-1)) gradually dropping for 3 months towards a level of COD loss by methane production at 15°C. Methane emission was low (<0.01 g COD L(-1)d(-1)) after a brief initial peak. Significant CODs generation was obtained during the warmer season (T > 10°C) in the full scale storage and almost no generation at lower temperatures (4-6°C). CODs consisted mainly of VFA, especially acetate. All VFAs were present at almost constant ratios. The naturally separated manure middle layer without sediment and coarser particles is suitable for sludge bed AD and improved further during an optimal storage time of 1-3 month(s). This implies that high rate AD can be integrated with regular manure slurry handling systems to obtain efficient biogas generation.
BioMed Research International 01/2014; 2014:712197. · 2.71 Impact Factor
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