scholarly journals Bioleaching of heavy metals from pig manure with indigenous sulfur-oxidizing bacteria: effects of sulfur concentration

Heliyon ◽  
2018 ◽  
Vol 4 (9) ◽  
pp. e00778 ◽  
Author(s):  
Xiaocheng Wei ◽  
Dongfang Liu ◽  
Lirui Liao ◽  
Zhendong Wang ◽  
Wenjiao Li ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Pig Manure ◽  
Sulfur Concentration ◽  
Sulfur Oxidizing ◽  
Sulfur Oxidizing Bacteria

Bioleaching of Heavy Metals from Pig Manure Employing Indigenous Sulfur-Oxidizing Bacteria: Effects of Solid Content

2019 ◽  
Vol 230 (2) ◽  
Author(s):  
Xiaocheng Wei ◽  
Wenli Huang ◽  
Dongfang Liu ◽  
Lirui Liao ◽  
Zhendong Wang ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Solid Content ◽  
Pig Manure ◽  
Sulfur Oxidizing ◽  
Sulfur Oxidizing Bacteria

Heavy metal removal from wastewater and leachate co-treatment sludge by sulfur oxidizing bacteria

2001 ◽  
Vol 44 (10) ◽  
pp. 53-58 ◽  
Author(s):  
L. C. Aralp ◽  
A. Erdincler ◽  
T. T. Onay
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Municipal Wastewater ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Heavy Metal Concentration ◽  
Organic Content ◽  
Removal Of Heavy Metals ◽  
Sulfur Oxidizing ◽  
Sulfur Oxidizing Bacteria

Heavy metal concentration in sludge is one of the major obstacles for the application of sludge on land. There are various methods for the removal of heavy metals in sludge. Using sulfur oxidizing bacteria for microbiological removal of heavy metals from sludges is an outstanding option because of high metal solubilization rates and the low cost. In this study, bioleaching by indigenous sulfur oxidizing bacteria was applied to sludges generated from the co-treatment of municipal wastewater and leachate for the removal of selected heavy metals. Sulfur oxidizing bacteria were acclimated to activated sludge. The effect of the high organic content of leachate on the bioleaching process was investigated in four sets of sludges having different concentrations of leachate. Sludges in Sets A, B, C and D were obtained from co-treatment of wastewater and 3%, 5%, 7% and 10% (v/v) leachate respectively. The highest Cr, Ni and Fe solubilization was obtained from Set A. Sulfur oxidizing bacteria were totally inhibited in Set D that received the highest volume of leachate.

Bioleaching of heavy metals from contaminated aquatic sediments using indigenous sulfur-oxidizing bacteria: a feasibility study

1998 ◽  
Vol 37 (6-7) ◽  
pp. 387-394 ◽  
Author(s):  
H. Seidel ◽  
J. Ondruschka ◽  
P. Morgenstern ◽  
U. Stottmeister
Keyword(s):  
Heavy Metals ◽  
Pilot Plant ◽  
River Sediments ◽  
Chemical Properties ◽  
Leaching Potential ◽  
Removal Of Heavy Metals ◽  
Sulfur Oxidizing ◽  
Physical And Chemical ◽  
Better Than ◽  
Sulfur Oxidizing Bacteria

The removal of heavy metals from contaminated river sediments was studied using suspension leaching under laboratory conditions and percolation leaching in a pilot plant. The leaching potential of indigenous sulfur-oxidizing bacteria was compared with acid treatment. Bioleaching with elemental sulfur as substrate was found to be better than treatment with sulfuric acid for the solubilization of all metals tested. The physical and chemical properties of the sediments used in this study did not affect leaching capacity under optimum conditions in the laboratory. Under the practical conditions in the pilot plant, the redox state of sludge had a considerable influence on leaching efficiency. In a deposited oxic sediment with good permeability, about 62% of the metals tested were removed by percolation leaching after 120 days. Zn, Cd, Ni, Co and Mn were sufficiently leached to enable treated sediments to be reused as soil. In a freshly dredged anoxic sediment, only a total of 9 % of metals were removed. The results indicate that freshly dredged sediments need to undergo pretreatment before percolation leaching to improve mass transfer and to activate the leaching active bacteria.

Biological leaching of heavy metals from anaerobically digested sewage sludge using indigenous sulfur-oxidizing bacteria and sulfur waste in a closed system

2001 ◽  
Vol 43 (2) ◽  
pp. 59-65 ◽  
Author(s):  
K. Kitada ◽  
A. Ito ◽  
K. Yamada ◽  
J. Aizawa ◽  
T. Umita
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Closed System ◽  
Elemental Sulfur ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Sulfur Oxidizing ◽  
Digested Sewage Sludge ◽  
Sulfur Oxidizing Bacteria

The utilization of indigenous sulfur-oxidizing bacteria and sulfur waste was investigated in order to remove heavy metals from anaerobically digested sewage sludge economically. Indigenous sulfur-oxidizing bacteria existing in anaerobically digested sewage sludge were activated by adding elemental sulfur to the sludge and then the bacteria were isolated. It was found that indigenous sulfur-oxidizing bacteria could utilize sulfur waste generated by desulfurization of digestion gas as a substrate. Then, biological leaching of heavy metals from anaerobically digested sewage sludge was carried out using indigenous sulfur-oxidizing bacteria and sulfur waste. By adding sulfur waste to sewage sludge, sulfuric acid was produced by the bacteria and the sludge pH decreased. Heavy metals in sewage sludge were effectively removed owing to the decrease of pH. The optimum amount of sulfur waste added to decrease the pH sufficiently was 5g/L when the sludge concentration was 2%. It was presented that the biological leaching of heavy metals from sewage sludge can be carried out in a closed system, where all required materials are obtained in a sewage treatment plant.

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