A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Catalytic Oxidation of Sulphide Laden Tannery Wastewater Without Sludge Production
Abstract The beam house operations in tanning process of hides/skins comprise of soaking, liming, fleshing and deliming operations. The removal of animal hair and flesh from skin is facilitated by the liming operation. About 5 m3/ton of wastewater containing a credible concentration of sulphide and dissolved proteins are discharged in tannery process. It is highly alkaline and having high BOD/COD ratio. The biological treatment of wastewater occurs at neutral pH requires neutralization of the wastewater using acidic stream. This results in the emission of hydrogen sulphide which is considered to be highly toxic gas. The present investigation employed Heterogeneous Peroxide Oxidation process (HPO) for the oxidation of sulphide in the lime sulphide liquor without sludge production with simultaneous removal of COD from wastewater. The screened effluent was adjusted to pH 9.7 using conc. sulphuric acid, and it is catalytically oxidized with hydrogen peroxide 3.921 mM/L and nanoporous activated carbon (NPAC), 30 g/L at HRT 24 h. The dosage of hydrogen peroxide, mass of NPAC and HRT were optimized. The integrated catalytic and biological oxidation in Fluidized Immobilized Carbon Catalytic Oxidation (FICCO) reactor eliminated COD, sulphide, total Kjeldahl nitrogen, protein, amino acids and TOC by 66.66, 98.95, 75.67, 44.21, 48.98 and 62.18%, respectively. The sulphide present in the wastewater was catalytically oxidized to sulphate, and ammonia content was increased about 78.05% by cleaving protein molecules.
Catalytic Oxidation of Sulphide Laden Tannery Wastewater Without Sludge Production
Abstract The beam house operations in tanning process of hides/skins comprise of soaking, liming, fleshing and deliming operations. The removal of animal hair and flesh from skin is facilitated by the liming operation. About 5 m3/ton of wastewater containing a credible concentration of sulphide and dissolved proteins are discharged in tannery process. It is highly alkaline and having high BOD/COD ratio. The biological treatment of wastewater occurs at neutral pH requires neutralization of the wastewater using acidic stream. This results in the emission of hydrogen sulphide which is considered to be highly toxic gas. The present investigation employed Heterogeneous Peroxide Oxidation process (HPO) for the oxidation of sulphide in the lime sulphide liquor without sludge production with simultaneous removal of COD from wastewater. The screened effluent was adjusted to pH 9.7 using conc. sulphuric acid, and it is catalytically oxidized with hydrogen peroxide 3.921 mM/L and nanoporous activated carbon (NPAC), 30 g/L at HRT 24 h. The dosage of hydrogen peroxide, mass of NPAC and HRT were optimized. The integrated catalytic and biological oxidation in Fluidized Immobilized Carbon Catalytic Oxidation (FICCO) reactor eliminated COD, sulphide, total Kjeldahl nitrogen, protein, amino acids and TOC by 66.66, 98.95, 75.67, 44.21, 48.98 and 62.18%, respectively. The sulphide present in the wastewater was catalytically oxidized to sulphate, and ammonia content was increased about 78.05% by cleaving protein molecules.
Catalytic Oxidation of Sulphide Laden Tannery Wastewater Without Sludge Production
Prabhakaran, N. (author) / Swarnalatha, S. (author) / Sekaran, G. (author)
2018-01-01
15 pages
Article/Chapter (Book)
Electronic Resource
English
Removal of Sulphide in Anaerobically Treated Tannery Wastewater by Wet Air Oxidation
| Online Contents | 1996
Effect of Oxidizers on Sulphide Removal from Hair Dissolving Liming Wastewater in Tannery
| DOAJ | 2021
Treatment of Tannery Wastewater by Electrochemical Oxidation Process
| British Library Conference Proceedings | 2013
Microbial Ecology of Bulking and Foaming Activated Sludge Treating Tannery Wastewater
| Online Contents | 2005