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Enhancement of Chemical-Oxygen Demand and Color Removal of Distillery Spent-Wash by Ozonation
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ABSTRACT:
Distillery spent-wash has very high organic content (75 000 to 125 000 mg/L chemical-oxygen demand [COD]), color, and contains difficult-to-biodegrade organic compounds. For example, anaerobic treatment of the distillery spent-wash used in this study resulted in 60% COD reduction and low color removal. Subsequent aerobic treatment of the anaerobic effluent resulted in enhancement of COD removal to 66%. In this paper, the effect of ozonation on various properties of the anaero...
Related newspaper, magazine, and journal articles from HighBeam Research
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Enhancement of Chemical-Oxygen Demand and Color Removal of Distillery Spent-Wash by Ozonation
Water Environment Research
; ABSTRACT: Distillery spent-wash has very high organic content (75 000 to 125 000 mg/L chemical-oxygen demand [COD color, and contains difficult-to-biodegrade organic compounds. For example, anaerobic treatment of the distillery spent-wash used in this study resulted in 60% COD reduction and low
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Treatment of Distillery Spent-Wash by Ozonation and Biodegradation: Significance of pH Reduction and Inorganic Carbon Removal Before Ozonation
Water Environment Research
; ABSTRACT: This study is aimed at exploring strategies for mineralization of refractory compounds in distillery effluent by anaerobic biodegradation/ozonation/aerobic biodegradalion. Treatment of distillery spent-wash used in this research by anaerobic-aerobic biodegradation resulted in overall COD
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High-sulfate, high-chemical oxygen demand wastewater treatment using aerated methanogenic fluidized beds
Water Environment Research
; ABSTRACT: Many industrial wastewaters have both high organic pollution and sulfate (SO^sup -2^^sub 4^) concentrations. Although biological conversion of organics to methane may be an economical chemical oxygen demand (COD) removal option, significant inhibition of methane production results from
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The ABCs of BAC. (use of biologically active carbon for water treatment)
Public Works
; Part One of this article, which appeared in the May issue, dealt with biologically active carbon as an option for reducing organics. Part Two addresses treatment and operation options. It has been demonstrated that, for the most effective BAC reduction of organics, it is necessary first to convert
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Anaerobic Treatment of High-Saline Wastewater Using Halophilic Methanogens in Laboratory-Scale Anaerobic Filters
Water Environment Research
; ABSTRACT: The presence of a high concentration of sodium in wastewater is considered inhibitory for anaerobic biological treatment. This research was designed to investigate the potential use of halophilic methanogens and a mixed culture of halophilic methanogens and digester sludge, in anaerobic
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Activated Sludge Inhibition by Chemical Stressors-A Comprehensive Study
Water Environment Research
; ABSTRACT: The effects of shock loads of 1-chloro-2,4-dinitrobenzene (CDNB); cadmium; 1-octanol; 2,4-dinitrophenol (DNP); weakly complexed cyanide; pH 5, 9, and 11; and high ammonia levels on activated sludge biomass growth, respiration rate, flocculation, chemical oxygen demand removal,
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Time-dependent retardation model for chemical oxygen demand removal in a subsurface-flow constructed wetland for winery wastewater treatment
Water Environment Research
; ABSTRACT: The relative success of chemical oxygen demand (COD) removal models to describe measured rates of COD removal in a pilotscale constructed wetland designed for treatment of high-strength winery wastewater are evaluated using retention times determined from tracer studies. Not surprisingly,
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Ozone decolorization of mixed-dye solutions in a gas-induced reactor
Water Environment Research
; ABSTRACT: Ozone decolorization of several mixed two- and three-- dye solutions was studied using a newly developed gas-induced reactor. Decolorization kinetics of the mixed-dye solutions, the ozone utilization rate, and chemical oxygen demand (COD) elimination during decolorization were all
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Removing BDOC by ozonation.(bacterial contamination)
Public Works
; The goal of disinfection in water treatment practice is to maximize protection from bacterial contamination while minimizing the formation of disinfection byproducts (DBPs). New regulations from EPA have imposed stricter disinfection requirements while limiting the allowable concentration of DBPs,
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Removal of Pyrene and Benzo(a)Pyrene from Contaminated Water by Sequential and Simultaneous Ozonation and Biotreatment
Water Environment Research
; ABSTRACT: The removal of pyrene and benzo(a)pyrene from contaminated water by sequential and simultaneous ozonation-bioremediation techniques was investigated. During the sequential treatment, ozonation using 0.5 or 2.5 mg/L ozone was used as a pretreatment process, whereas, during the simultaneous
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