Abstract
Secondary treatment of wastewater by trickling bed filters is commonly used since it has potential not only to reduce COD, but also nitrogen content in the wastewater. In the current study, 3 bed trickle filter containing gravels and pebbles were utilized to provide secondary treatment to wastewater. Flow path in 3 bed packing with wire mesh in between the packing showed that liquid maldistribution was minimum in comparison with beds without partitioning meshes. Pretreated dairy wastewater was subjected to secondary treatment and the results showed that COD, TKN (Total Kjeldahl Nitrogen) and organic nitrogen undergoes reduction, with a steady rise in percentage reduction of COD and TKN with the number of trials. However, percentage reduction in organic nitrogen showed a negative trend probably due to variation in microbial flora. Also, significant drop in the performance of the trickle bed filter in 5th trial was observed, probably due to sloughing or due to loss of activity of the biofilm on the media of trickle bed filter.
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Ramananda Bhat, M., Nayak, S., Pariti, A., Dhawan, S. (2017). Secondary Treatment of Dairy Effluents with Trickle Bed. In: Mohan B., R., Srinikethan, G., Meikap, B. (eds) Materials, Energy and Environment Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-10-2675-1_36
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DOI: https://doi.org/10.1007/978-981-10-2675-1_36
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