Process For Biological Oxidation And Control Of Dissolved Iron In Bioleach Liquors
Iron has a central role in bioleaching and biooxidation processes. Fe2+ produced in the dissolution of sulfidic minerals is re-oxidized to Fe3+ mostly by biological action in acid bioleaching processes. To control the concentration of iron in solution, it is important to precipitate the excess as part of the process circuit.
Process For Biological Oxidation And Control Of Dissolved Iron In Bioleach Liquors
Iron has a central role in bioleaching and biooxidation processes. Fe2+ produced in the dissolution of sulfidic minerals is re-oxidized to Fe3+ mostly by biological action in acid bioleaching processes. To control the concentration of iron in solution, it is important to precipitate the excess as part of the process circuit.
Sequential Treatment Of Olive Oil Mill Wastewater With Adsorption And Biological And Photo-Fenton Oxidation
Olive oil mill wastewater (OMWW) is a highly toxic effluent obtained from the extraction process by the olive oil industry and creates a major problem in Turkey as in other Mediterranean countries. This effluent is characterized by an unpleasant smell, dark color, and high organic matter content such as sugars, tannins, polyphenols, polyalcohols, pectins, and lipids. As reported by several authors, more than 30 phenolic compounds have been detected in OMWW (De Marco et al. 2007).
Sequential Treatment Of Olive Oil Mill Wastewater With Adsorption And Biological And Photo-Fenton Oxidation
Olive oil mill wastewater (OMWW) is a highly toxic effluent obtained from the extraction process by the olive oil industry and creates a major problem in Turkey as in other Mediterranean countries. This effluent is characterized by an unpleasant smell, dark color, and high organic matter content such as sugars, tannins, polyphenols, polyalcohols, pectins, and lipids. As reported by several authors, more than 30 phenolic compounds have been detected in OMWW (De Marco et al. 2007).
Tannery Wastewater Treatment By Electro-Oxidation Coupled With A Biological Process
The majority of treatment plants for tannery wastewater are based on the biological activated sludge process. In Europe, where stringent limits for nitrogen have to be observed, a commonly applied treatment scheme for tannery wastewater is based on biological methods comprising nitrification–denitrification, sometimes preceded by chemical pre-treatment, generating huge quantities of sludge, particularly when high strength wastewater is treated. Biological nitrification often suffers inhibition as nitrifying bacteria are sensitive to many organic compounds and metal ions. For this reason it is pertinent to investigate other, more reliable, methods to solve pollution problems associated with the tannery industry.
Tannery Wastewater Treatment By Electro-Oxidation Coupled With A Biological Process
The majority of treatment plants for tannery wastewater are based on the biological activated sludge process. In Europe, where stringent limits for nitrogen have to be observed, a commonly applied treatment scheme for tannery wastewater is based on biological methods comprising nitrification–denitrification, sometimes preceded by chemical pre-treatment, generating huge quantities of sludge, particularly when high strength wastewater is treated. Biological nitrification often suffers inhibition as nitrifying bacteria are sensitive to many organic compounds and metal ions. For this reason it is pertinent to investigate other, more reliable, methods to solve pollution problems associated with the tannery industry.
The Treatment Of Azo Dyes Found In Textile Industry Wastewater By Anaerobic Biological Method And Chemical Oxidation
The treatment of synthetic wastewater containing azo dyes found in textile industry wastewater was carried out by anaerobic biological method and chemical oxidation. The main target of this study was to compare different treatment methods and to evaluate the effect of different parameters on treatment effectiveness.
The Treatment Of Azo Dyes Found In Textile Industry Wastewater By Anaerobic Biological Method And Chemical Oxidation
The treatment of synthetic wastewater containing azo dyes found in textile industry wastewater was carried out by anaerobic biological method and chemical oxidation. The main target of this study was to compare different treatment methods and to evaluate the effect of different parameters on treatment effectiveness.
Treatment Of Leather Industry Wastewater By Aerobic Biological And Fenton Oxidation Process
Degradation of leather industry wastewater by sole aerobic treatment incorporating Thiobacillus ferroox-idans, Fenton’s reagents, and combined treatment was investigated in this study. The sole treatment by Fenton’s oxidation involving the introduction of 6 g FeSO4 and 266 g H2O2 in a liter of wastewater at pH of 3.5 and 30 ◦C for 30 min at batch conditions reduced COD, BOD5, sulfide, total chromium and color up to 69%, 72%, 88%, 5%, 100% and T. ferrooxidans alone showed maximum reduction to an extent of 77, 80, 85, 52, 89, respectively, in 21 d treatment at pH 2.5, FeSO4 16 g/L and temperature of 30 ◦C.
Treatment Of Leather Industry Wastewater By Aerobic Biological And Fenton Oxidation Process
Degradation of leather industry wastewater by sole aerobic treatment incorporating Thiobacillus ferroox-idans, Fenton’s reagents, and combined treatment was investigated in this study. The sole treatment by Fenton’s oxidation involving the introduction of 6 g FeSO4 and 266 g H2O2 in a liter of wastewater at pH of 3.5 and 30 ◦C for 30 min at batch conditions reduced COD, BOD5, sulfide, total chromium and color up to 69%, 72%, 88%, 5%, 100% and T. ferrooxidans alone showed maximum reduction to an extent of 77, 80, 85, 52, 89, respectively, in 21 d treatment at pH 2.5, FeSO4 16 g/L and temperature of 30 ◦C.
Wastewater Treatment: Wet Air Oxidation As A Precursor To Biological Treatment
The use of wet air oxidation as a pretreatment step in the context of an integrated chemical/biological process was investigated for model organic-containing wastewaters. It was found that the selection of suitable wastewaters and pretreatment conditions (i.e. temperature, residence time, use of catalysts) was significant for the effective application of an integrated process.
Wastewater Treatment: Wet Air Oxidation As A Precursor To Biological Treatment
The use of wet air oxidation as a pretreatment step in the context of an integrated chemical/biological process was investigated for model organic-containing wastewaters. It was found that the selection of suitable wastewaters and pretreatment conditions (i.e. temperature, residence time, use of catalysts) was significant for the effective application of an integrated process.
Biological Degradation And Chemical Oxidation Characteristics Of Coke-Oven Wastewater
Industrial wastewaters, containing various refractory organic pollutants, are often discharged into the water environment without appropriate treatments. In order to remove refractory organic pollutants effectively from industrial wastewaters, the optimal treatment process with high quality effluent and low operating cost must be selected and moreover appropriate operation of the wastewater treatment process is required.
Biological Degradation And Chemical Oxidation Characteristics Of Coke-Oven Wastewater
Industrial wastewaters, containing various refractory organic pollutants, are often discharged into the water environment without appropriate treatments. In order to remove refractory organic pollutants effectively from industrial wastewaters, the optimal treatment process with high quality effluent and low operating cost must be selected and moreover appropriate operation of the wastewater treatment process is required.