Bioaugmentation process of secondary effluents for reduction of pathogens, heavy metals and antibiotics

Algheethi, Adel Ali Saeed Abduh and Mohamed, R. M. S. R. and Efaq, A. N. and I. , Norli and Abdullah, Abd Halid and Mohd Kassim, Amir Hashim and Ab Kadir, M. O. (2016) Bioaugmentation process of secondary effluents for reduction of pathogens, heavy metals and antibiotics. Journal of Water and Health .

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Abstract

The study probed into reducing faecal indicators and pathogenic bacteria, heavy metals and β-lactam antibiotics, from four types of secondary effluents by bioaugmentation process, which was conducted with Bacillus subtilis strain at 45 Celsius. As a result, faecal indicators and pathogenic bacteria were reduced due to the effect of thermal treatment process (45 Celsius), while the removal of heavy metals and β-lactam antibiotics was performed through the functions of bioaccumulation and biodegradation processes of B. subtilis. Faecal coliform met the guidelines outlined by WHO and U. S. EPA standards after 4 and 16 days, respectively. Salmonella spp. and Staphylococcus aureus were reduced to below the detection limits without renewed growth in the final effluents determined by using a culture-based method. Furthermore, 13.5% and 56.1% of cephalexin had been removed, respectively, from secondary effluents containing 1 g of cephalexin L^(-1) (secondary effluent 3), as well as 1 g of cephalexin L^(-1) and 10 mg of Ni2þ L^(-1) (secondary effluent 4) after 16 days. The treatment process, eventually, successfully removed 96.6% and 66.3% of Ni^(2+) ions from the secondary effluents containing 10 mg of Ni^(2+) L^(-1) (secondary effluent 2) and E4, respectively. The bioaugmentation process improved the quality of secondary effluents.

Item Type:Article
Uncontrolled Keywords:Bacillus subtilis 2012WTNC; bioaccumulation; biodegradation; cephalexin; nickel; pathogenic bacteria
Subjects:T Technology > TP Chemical technology > TP155-156 Chemical engineering
Divisions:Faculty of Civil and Environmental Engineering > Department of Chemical and Bioprocess Engineering
ID Code:8478
Deposited By:Mr. Mohammad Shaifulrip Ithnin
Deposited On:24 May 2017 15:57
Last Modified:24 May 2017 15:57

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