Abstract
The present study explores the feasibility of biogas production from dairy wastewater in the UAF reactor with simultaneous wastewater treatment. The study was carried out at different hydraulic retention times (8h, 12h, 16h, 24h). Two different media such as pebble stone media and aggregate media were used as the packed media. The maximum COD removal efficiency of 91.55 % is achieved at the hydraulic retention time of 24 Hours with an organic loading rate of 1.35 kg/m3 /d for aggregate media, whereas for pebble stone media a maximum COD removal efficiency of 76.32 % is achieved. Before the start of the experiments, the COD/BOD ratio is fixed to 1.4 with initial COD and BOD of 1350 mg/L and 960 mg/L. So, from the results it is concluded that the Upflow Anaerobic Filter (UAF) Reactor can be used as a one of the best treatment methods for the diary wastewater treatment.
Highlights
Biogas production is one of the best by-products that can be obtained from the wastewater in the anaerobic digestion tank at optimum hydraulic retention time and organic loading rate [6-7]
Maximum COD removal efficiency of 76.72% for pebble stone media and 91.55% for aggregate was achieved at an organic loading rate (OLR) of 1.35 kg COD/m3/d for hydraulic retention time (HRT) of 24h
The reason for the lower removal efficiency could be due to the higher organic loading rate at shorter HRT
Summary
Water pollution is an emerging problem in the modern world due to the rapid use of water in industries for manufacturing and other purposes [1] These pollutions are causing serious issues to the environment and in turn, affect the surface water and groundwater. From the biogas, it possible to generate electricity This anaerobic digestion tank will be the economical treatment method for sludge and wastewater treatment. The first is concerned with high flowrates and second is dealing with small milk transformation units Due to this highly polluted wastewater, industries are not having the capacity to treat the wastewater and result in a direct discharge into the environment. The current investigation deals with the treatment of dairy wastewater in an up-flow anaerobic filter reactor for the biogas production using different media as a packing material.
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