Microremediation of tannery wastewater by siderophore producing marine bacteria

The present study evaluated the microremediation potential of nine siderophore producing marine bacteria for hazardous raw tannery wastewater from common effluent treatment plant (CETP). Most of the pollutants detected in the wastewater were diminished after the bioremediation process. Further, amon...

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Published in:Environmental technology 2020-12, Vol.41 (27), p.3619-3632
Main Authors: Vijayaraj, A. S., Mohandass, C., Joshi, Devika
Format: Article
Language:English
Subjects:
Anaerobic conditions
Anaerobic processes
Animal models
Artemia
Bacteria
Bioassays
Biochemical oxygen demand
Bioremediation
Chemical oxygen demand
Chemical pollution
Chromium
Effluent treatment
Effluents
Environmental cleanup
Germination
Hazardous wastes
marine bacteria
multiple-toxicants
Pollutants
Pollution control
Pollution load
Seed germination
Statistical analysis
Sulfates
Survival
tannery
Textile industry wastewaters
Toxicants
Toxicity
toxicity bioassay
Wastewater disposal
Wastewater pollution
Wastewater treatment
Wastewater treatment plants
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creator Vijayaraj, A. S.
Mohandass, C.
Joshi, Devika
description The present study evaluated the microremediation potential of nine siderophore producing marine bacteria for hazardous raw tannery wastewater from common effluent treatment plant (CETP). Most of the pollutants detected in the wastewater were diminished after the bioremediation process. Further, among the three potent isolates selected for aerobic and anaerobic bioremediation study, Marinobacter hydrocarbonoclasticus demonstrated the highest bioremediation aerobically with a reduction in chromium (88%), sulphate (71%), phosphate (68%) and nitrate (57%). Notably, Nitratireductor kimnyeongensis could attack the effluent under both aerobic and anaerobic conditions as substantiated by statistically significant (p 
doi_str_mv 10.1080/09593330.2019.1615995
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S. ; Mohandass, C. ; Joshi, Devika</creator><creatorcontrib>Vijayaraj, A. S. ; Mohandass, C. ; Joshi, Devika</creatorcontrib><description>The present study evaluated the microremediation potential of nine siderophore producing marine bacteria for hazardous raw tannery wastewater from common effluent treatment plant (CETP). Most of the pollutants detected in the wastewater were diminished after the bioremediation process. Further, among the three potent isolates selected for aerobic and anaerobic bioremediation study, Marinobacter hydrocarbonoclasticus demonstrated the highest bioremediation aerobically with a reduction in chromium (88%), sulphate (71%), phosphate (68%) and nitrate (57%). Notably, Nitratireductor kimnyeongensis could attack the effluent under both aerobic and anaerobic conditions as substantiated by statistically significant (p &lt; .05) reduction in the pollutants [chromium (85%), sulphate (63%), Chemical Oxygen Demand (COD) (69%), phosphate (76%)]. From the study it is evident that the pollutant load reduction was achieved under both aerobic and anaerobic conditions, however, aerobic environment was more effective in reducing chromium, Biochemical Oxygen Demand (BOD), sulphate, nitrate and phosphate. The bioremediation efficiency was further confirmed by the bioassay experiments with plant and animal models where higher seed germination, greater plant length and biomass, as well as improved survival rate of Artemia nauplii for bioremediated wastewater was observed as compared to the untreated effluent indicating a significant reduction in toxicity. The results for simultaneous removal of multiple-toxicants thus signify effectiveness and ease of using the robust properties of these marine bacterial strains suggesting their potential application for bioremediation. 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subjects Anaerobic conditions
Anaerobic processes
Animal models
Artemia
Bacteria
Bioassays
Biochemical oxygen demand
Bioremediation
Chemical oxygen demand
Chemical pollution
Chromium
Effluent treatment
Effluents
Environmental cleanup
Germination
Hazardous wastes
marine bacteria
multiple-toxicants
Pollutants
Pollution control
Pollution load
Seed germination
Statistical analysis
Sulfates
Survival
tannery
Textile industry wastewaters
Toxicants
Toxicity
toxicity bioassay
Wastewater disposal
Wastewater pollution
Wastewater treatment
Wastewater treatment plants
title Microremediation of tannery wastewater by siderophore producing marine bacteria
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