Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/122491
Title: ALKALINE BIOLEACHING OF MUNICIPAL SOLID WASTER INCINERATION FLY ASH WITH INDIGENOUS EXTREMOPHILES
Authors: THULASYA RAMANATHAN
Keywords: Fly ash, bioleaching, indigenous isolates, alkaliphiles, fly ash-tolerance, mechanistic study
Issue Date: 14-Aug-2015
Citation: THULASYA RAMANATHAN (2015-08-14). ALKALINE BIOLEACHING OF MUNICIPAL SOLID WASTER INCINERATION FLY ASH WITH INDIGENOUS EXTREMOPHILES. ScholarBank@NUS Repository.
Abstract: BIOLEACHING OF FLY ASH IS CHALLENGING DUE LARGELY TO THE ALKALINE NATURE AND TOXIC LEVELS OF HEAVY METALS WHICH ARE DETRIMENTAL TO MICROBIAL GROWTH AND BIOLEACHING ACTIVITY. THE PRESENT WORK REPORTS THE ISOLATION OF INDIGENOUS BACTERIA FROM A LOCAL FLY ASH LANDFILL SITE AND THEIR BIOLEACHING PERFORMANCE. EIGHTEEN OUT OF THE THIRTY EIGHT INDIGENOUS ISOLATES SHOWED BIOLEACHING POTENTIAL, WITH SIGNIFICANT ALKALINE PH OR FLY ASH TOLERANCE. GENETIC CHARACTERIZATION OF THE STRAINS REVEALED A DOMINANCE OF FIRMICUTES, WITH ?ALKALIBACTERIUM SP. TRTYP6? BEING THE BEST PERFORMER WITH FLY ASH TOLERANCE OF UP TO 20% AND GROWTH OVER A PH RANGE 8-13. THE ORGANISM SELECTIVELY RECOVERED ABOUT 50% COPPER FROM THE WASTE. ALKALIBACTERIUM SP. USED CONTACT AND NON-CONTACT MODES OF BIOLEACHING FOR COPPER EXTRACTION WITH BIOGENICALLY SYNTHESIZED ORGANIC ACIDS ACTING AS LEACHING AGENTS. TO THE BEST OF OUR KNOWLEDGE, THIS IS THE FIRST TIME A STUDY ON BIOLEACHING WITH EXTREME ALKALIPHILES IS REPORTED.
URI: http://scholarbank.nus.edu.sg/handle/10635/122491
Appears in Collections:Ph.D Theses (Open)

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
Thesis_21Jan16.pdf2.93 MBAdobe PDF

OPEN

NoneView/Download

Page view(s)

58
checked on Nov 16, 2018

Download(s)

49
checked on Nov 16, 2018

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.