Closure to “Bioleaching of Metals from Sewage Sludge: Elemental Sulfur Recovery” by B. R. Ravishankar, J. F. Blais, H. Benmoussa, and R. D. Tyagi

1995 ◽  
Vol 121 (7) ◽  
pp. 543-544
Author(s):  
B. R. Ravishankar ◽  
J. F. Blais ◽  
H. Benmoussa ◽  
R. D. Tyagi
Keyword(s):  
Sewage Sludge ◽  
Elemental Sulfur ◽  
Sulfur Recovery

Bioleaching of Metals from Sewage Sludge: Elemental Sulfur Recovery

1995 ◽  
Vol 121 (7) ◽  
pp. 543-544
Author(s):  
Rajesh Seth ◽  
Durga Prasad ◽  
J. Glynn Henry
Keyword(s):  
Sewage Sludge ◽  
Elemental Sulfur ◽  
Sulfur Recovery

Bioleaching of Metals from Sewage Sludge: Elemental Sulfur Recovery

1994 ◽  
Vol 120 (2) ◽  
pp. 462-470 ◽  
Author(s):  
B. R. Ravishankar ◽  
J. F. Blais ◽  
H. Benmoussa ◽  
R. D. Tyagi
Keyword(s):  
Sewage Sludge ◽  
Elemental Sulfur ◽  
Sulfur Recovery

Biolixiviation des métaux lourds et stabilisation des boues d'épuration : essai en bioréacteur opéré en mode cuvée

1993 ◽  
Vol 20 (1) ◽  
pp. 57-64 ◽  
Author(s):  
R. D. Tyagi ◽  
J. F. Blais ◽  
N. Meunier ◽  
D. Kluepfel
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Suspended Solids ◽  
Elemental Sulfur ◽  
Batch Reactor ◽  
Fecal Coliforms ◽  
Sludge Stabilization ◽  
Sludge Digestion ◽  
Batch Time ◽  
Phosphorus And Potassium

A biological process of heavy metals solubilization and sewage sludge stabilization was studied in a batch reactor of 30-L capacity. The acclimatized leaching microflora was composed of two major groups of thiobacilli: less acidophilic and acidophilic. A batch time of 10 days allows a substantial metal solubilization: cadmium (100%), copper (80%), manganese (80%), nickel (46%), and zinc (100%). The bioleaching process also causes a significative decrease in sludge total suspended solids (25%) and volatile suspended solids (32%), and a considerable reduction (under the detection limit of 10 cfu∙mL−1) of indicator bacteria (total coliforms, fecal coliforms, fecal streptococci). After filtration or centrifugation of the leached sludge, the solubilized metals were precipitated by lime neutralization. The phosphorus and potassium sludge contents were not affected by bioleaching process. These results indicate that the process of sludge digestion and metal leaching can be conducted in parallel in the same reactor. Key words: sewage sludge, heavy metals, bioleaching, stabilization, thiobacilli, elemental sulfur.

Evaluation of a hybrid physicochemical/biological technology to remove toxic H2S from air with elemental sulfur recovery

Chemosphere ◽  
2019 ◽  
Vol 222 ◽  
pp. 732-741 ◽  
Author(s):  
Antonio Velasco ◽  
Juan Manuel Morgan-Sagastume ◽  
Armando González-Sánchez
Keyword(s):  
Elemental Sulfur ◽  
Sulfur Recovery ◽  
Biological Technology

A novel boost circuit design and in situ electricity application for elemental sulfur recovery

2014 ◽  
Vol 248 ◽  
pp. 317-322 ◽  
Author(s):  
Jia Liu ◽  
Yujie Feng ◽  
Weihua He ◽  
Yuanyuan Gong ◽  
Youpeng Qu ◽  
...  
Keyword(s):  
Circuit Design ◽  
Elemental Sulfur ◽  
Sulfur Recovery

Elemental Sulfur Recovery through H2Regeneration of a SO2-Adsorbed CuO/Al2O3

2007 ◽  
Vol 46 (8) ◽  
pp. 2661-2664 ◽  
Author(s):  
Youhua Zhao ◽  
Zhenyu Liu ◽  
Zhehua Jia ◽  
Xinyan Xing
Keyword(s):  
Elemental Sulfur ◽  
Sulfur Recovery

Can the plant availability of elemental sulfur be enhanced through its combination with sewage sludge and hydrated lime?

1998 ◽  
Vol 78 (3) ◽  
pp. 459-466 ◽  
Author(s):  
G. D. Sulewski ◽  
J. J. Schoenau
Keyword(s):  
Sewage Sludge ◽  
Elemental Sulfur ◽  
Particle Diameter ◽  
Hydrated Lime ◽  
Growth Chamber ◽  
Initial Oxidation ◽  
Plant Availability ◽  
Oxidation Rates ◽  
Handling Characteristics ◽  
S Oxidation

Elemental sulfur (S°) was combined with dried anaerobically digested sewage sludge (DDS) and/or hydrated lime (Ca(OH)2) to create a possible alternative to conventional S° fertilizers. These S° blends were studied in both powdered and pelletized form to discern both the role of DDS as a fertilizer binder and as a potential stimulator of heterotrophic S° oxidation. The S° blends were visually examined to obtain general conclusions regarding surface characteristics and potential plant availability. An incubation lasting 12 wk was used to examine the short-term release of sulfate from fine (mean particle diameter [MPD] = 82 µm) and coarse (MPD = 353 µm) S° blends. Sulfate supply potential and the effects of S° pelletization were studied in the growth chamber with canola as the test crop. An apparent link existed between enhanced S° oxidation rate and a modified surface environment produced by the combination of S° + DDS + Ca(OH)2. Soil amendment with S° blends containing DDS + Ca(OH)2 or Ca(OH)2 showed initial oxidation rates superior to S° alone. Growth chamber observations revealed higher canola yield and sulfate recovery with application of S° blends containing DDS + Ca(OH)2 over S° alone. Attempts at pelletizing the S° blends resulted in improved handling characteristics, but lowered product performance due to poor dispersion in soil. Key words: Elemental sulfur, sewage sludge, oxidation, plant availability

scholarly journals Implementation of a Sulfide–Air Fuel Cell Coupled to a Sulfate-Reducing Biocathode for Elemental Sulfur Recovery

2021 ◽  
Vol 18 (11) ◽  
pp. 5571
Author(s):  
Enric Blázquez ◽  
David Gabriel ◽  
Juan Antonio Baeza ◽  
Albert Guisasola ◽  
Pablo Ledezma ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Fuel Cell ◽  
Sulfate Reduction ◽  
Electron Donor ◽  
Lower Energy ◽  
Elemental Sulfur ◽  
Sulfur Recovery ◽  
Sulfate Reducing ◽  
Electrochemical Systems ◽  
Recovery System

Bio-electrochemical systems (BES) are a flexible biotechnological platform that can be employed to treat several types of wastewaters and recover valuable products concomitantly. Sulfate-rich wastewaters usually lack an electron donor; for this reason, implementing BES to treat the sulfate and the possibility of recovering the elemental sulfur (S0) offers a solution to this kind of wastewater. This study proposes a novel BES configuration that combines bio-electrochemical sulfate reduction in a biocathode with a sulfide–air fuel cell (FC) to recover S0. The proposed system achieved high elemental sulfur production rates (up to 386 mg S0-S L−1 d−1) with 65% of the sulfate removed recovered as S0 and a 12% lower energy consumption per kg of S0 produced (16.50 ± 0.19 kWh kg−1 S0-S) than a conventional electrochemical S0 recovery system.

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