Effect of extracellular enzyme activity on digestion performance of mesophilic UASB reactor treating high-strength municipal wastewater

Abstract

Effect of extracellular enzyme activity on digestion performance of up-flow anaerobic sludge blanket (UASB) reactor was investigated for enhancement of anaerobic treatability of municipal wastewater. Two identical UASB reactors (9 L), namely Reactor-A (without enzyme addition) and Reactor-B (with enzyme addition),were simultaneously operated at mesophilic conditions (32 ± 2°C) with a hydraulic retention time of 24 h. Preliminary test results showed that the highest total chemical oxygen demand (TCOD) removal were achieved with an extracellular enzyme dosage of 0.2 mL/L. In the activation period of the extracellular enzyme (on days 186-212), while Reactor-A removed up to 69.3% of TCOD and 55.9% of soluble chemical oxygen demand (SCOD), Reactor-B effectively removed up to 81.9% of TCOD and 72.2% of SCOD. The average VFA/alkalinity ratios were determined to be about 0.40 (±0.03) and 0.28 (±0.08) for Reactor-A and Reactor-B, respectively.

Utilization of the White-rot Fungus, Trametes menziesiifor Landfill Leachate Treatment

“…These enzymes were known for their ability to degrade a variety of environmental pollutants that include leachate. The ability of these enzymes to degrade a variety of industrial pollutants, environmental pollutants and leachate was also supported by Turkdogan-Aydinol et al (2011).…”

Novel Application of Mahua (Madhuca sp.) Flowers for Augmented Protease Production from Aeromonas sp. S1

“…The global enzymes market is expanding day by day due to their extensive applications in biotechnology and industry [1,2]. Enzymes are not only being used in different industrial processes for manufacturing of a wide variety of products, but today they are also being looked at as an eco-friendly option for treatment of industrial/municipal wastes [3,4]. Among various enzymes exploited globally, protease came out as a major hydrolytic enzyme.…”