[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. · 5.51 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: The feasibility of a mesophilic anaerobic treatment of an alcohol distillery wastewater (beet molasses stillage) was studied in a 1300 l Uppow Anaerobic Sludge Blanket (UASB) reactor f o r a period of 180 days. The system was seeded with 600 L of mesophilic anaerobic sludge harvested from the bottom of a dairy anaerobic lagoon. Nutrients were added to acidiied e and after adjusting the pH in an equalization tank, the system was fed with a diluted eeuent containing COD in the range of 1000-11000 mg/L at 30 C. Initially, the system had an OLR of 1 kg COD m ;3 d ;1 and uppow velocity w as maintained at 0.6 m/h (HRT= 6 h) throughout the study. A gradual increase in OLR, through increased feed concentration, resulted in an excessive sludge washout necessitating the addition of calcium carbonate to act as a nuclei for granule formation. After 20 days of operation and at an OLR of 5.3 kg COD m ;3 d ;1 , signs of granule formation were observed, as indicated by increased VSS at the bottom of the reactor and reduced eeuent VSS. At this point, the loading to the system was increased in four stages up to 16 kg COD m ;3 d ;1 (COD removal eeciency of 95%) to evaluate the optimum operational conditions of the system. During this period, the VSS/SS ratio remained constant at 0.83 and the SLR varied from 0.14 to 0.81 kg COD kg ;1 VSS d ;1 . The performance of the system, based on unit reactor volume and unit microbial mass, was 10 kg SCOD m ;3 d ;1 and 0.25 kg SCOD kg ;1 VSS d ;1 , respectively.
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