Article History

Received 02 November 2017
Received in revised form 13 November 2017
Accepted 22 November 2017
Available online 30 November 2017


Commercial Flight kitchen, conventional activated sludge plant, Heterotrophic bacteria, Effluent treatment.

Heterotrophic bacterial flora associated with the Conventional Activated sludge plant employed for treating effluent of a commercial flight kitchen

Sajan Vazhappilly Lonappan, Sarita Ganapathy Bhat and Muthusamy Chandrasekaran*

Department of Biotechnology, Cochin University of Science and Technology, Cochin - 682022, Kerala, India.

*Corresponding author :

ABSTRACT: Safe disposal of wastewater, reuse and recycle of the same is mandatory for effective management of wastewater generated and disposed by human activities. In this study wastewater generated from a commercial flight kitchen catering to the needs of different flight services operating from the International Airport, Cochin, India, subjected to treatment by conventional activated sludge plant (CASP) was evaluated for its efficiency and the bacterial diversity associated with CASP. Samples collected over a period of five months were evaluated for the Organic Load Removal Efficiency (OLRE) of the system with regard to the removal of the BOD5, COD, TSS and FOG of the disposed effluent. Total viable counts were made on the samples of the Mixed Liquor Suspended Solids (MLSS) of the conventional activated sludge plant (CASP) and distinct colony types were isolated and identified employing polyphasic taxonomy including molecular taxonomy. The CASP showed more than 50% OLRE. Species of Bacillus were the predominant group among the bacteria isolated, and most of them were capable of producing amylase, caseinase, gelatinase, lipase, and cellulase production; biofilm formation; and biosurfactant production. Study indicated that species of Bacillus play a significant role in the efficiency of CASP.


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