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2018•Nature Environment and Pollution TechnologyOpen access

Influence of Organic Loading Rate in Acclimatization Phase of Hybrid Upflow Anaerobic Sludge Blanket (UASB) Reactor Treating Distillery Spent Wash

R. Thiyagu, P. Sivarajan

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Abstract

A lab scale hybrid Upflow Anaerobic Sludge Blanket (UASB) reactor inoculated with anaerobic digested sludge, procured from distillery industry, was used to treat distillery wastewater with low strength of organic loads during acclimatization phase under ambient conditions. The lab scale hybrid UASB reactor with an effective volume of 12.5 L was operated for period of 80 days as a start-up phase at temperature 30±5°C, optimal hydraulic retention time (HRT) of 24 h, for various organic loading rates (OLR) viz., 0.25, 0.35, 0.70, 1.10, 1.30, 2.30 kg COD m-3d-1 respectively. Chemical oxygen demand (COD) removal efficiency achieved was more than 95% and biogas rich in methane content was produced. Sludge granules were observed under scanning electron microscope (SEM). The study revealed that the hybrid UASB reactor would be a feasible, eco-friendly and sustainable treatment system for treating distillery spent wash.

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A lab scale hybrid Upflow Anaerobic Sludge Blanket (UASB) reactor inoculated with anaerobic digested sludge, procured from distillery industry, was used to treat distillery wastewater with low strength of organic loads during acclimatization phase under ambient conditions. The lab scale hybrid UASB reactor with an effective volume of 12.5 L was operated for period of 80 days as a start-up phase at temperature 30±5°C, optimal hydraulic retention time (HRT) of 24 h, for various organic loading rates (OLR) viz., 0.25, 0.35, 0.70, 1.10, 1.30, 2.30 kg COD m-3d-1 respectively. Chemical oxygen demand (COD) removal efficiency achieved was more than 95% and biogas rich in methane content was produced. Sludge granules were observed under scanning electron microscope (SEM). The study revealed that the hybrid UASB reactor would be a feasible, eco-friendly and sustainable treatment system for treating distillery spent wash.

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Available abstract

A lab scale hybrid Upflow Anaerobic Sludge Blanket (UASB) reactor inoculated with anaerobic digested sludge, procured from distillery industry, was used to treat distillery wastewater with low strength of organic loads during acclimatization phase under ambient conditions. The lab scale hybrid UASB reactor with an effective volume of 12.5 L was operated for period of 80 days as a start-up phase at temperature 30±5°C, optimal hydraulic retention time (HRT) of 24 h, for various organic loading rates (OLR) viz., 0.25, 0.35, 0.70, 1.10, 1.30, 2.30 kg COD m-3d-1 respectively. Chemical oxygen demand (COD) removal efficiency achieved was more than 95% and biogas rich in methane content was produced. Sludge granules were observed under scanning electron microscope (SEM). The study revealed that the hybrid UASB reactor would be a feasible, eco-friendly and sustainable treatment system for treating distillery spent wash.

Key concepts: Chemical oxygen demand, Biogas, Hydraulic retention time, Wastewater, Pulp and paper industry, Blanket, Hybrid reactor, Anaerobic digestion

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