Fate of water soluble azo dyes in the activated sludge process Download PDF EPUB FB2
The study was approached by dosing the feed to the pilot ASP systems with various water soluble azo dyes and by monitoring each dye compound through the system, analyzing both liquid and sludge samples. The fate of the parent dye compound was assessed via mass balance by: The study was approached by dosing the feed to the pilot ASP systems with various water soluble azo dyes and by monitoring each dye compound through the system, analyzing both liquid and sludge samples.
The fate of the parent dye compound was assessed via mass balance calculations. ADS Classic is now deprecated. It will be completely retired in October Please redirect your searches to the new ADS modern form or the classic info can be found on our blog.
In this research, the fate of azo dyes in sludges was studied. Azo dyes are characterized by nitrogen to nitrogen double bonds (N~N).
The color of azo dyes is due to azo bonds and associated chromophores. Digestion of Reactive Black 5 dye and Navy dye wash water from a textile mill was studied in this by: Shaul GM, Holdsworth TJ, Dempsey CR, Dostal KA () Fate of water soluble azo dyes in the activated sludge process.
Chemosphere has been cited by the following article. In order for this strategy to work, azo dye reduction should occur in biofilms exposed to oxygen. Therefore, the effect of oxygen on the azo dye reduction by methanogenic granular sludge was studied using Mordant Orange 1 (MO1) as a model.
Shaul GM, Holdsworth TJ, Dempsey CR, Dostal KA () Fate of water soluble azo dyes in the activated sludge process. Chemosphere – CrossRef Google Scholar Shaw CB, Carliell CM, Wheatley AD () Anaerobic/aerobic treatment of coloured textile effluents using sequencing batch by: 2.
Shaul et al. () investigated the partitioning of water-soluble azo dyes in the activated sludge process. A total of 18 dyes were tested and categorised according to. Furthermore, the pigments are only sparingly soluble in water and may rather quickly be bound to the particulate matter or sludge if subjected to waste water treatment.
This indicates that the actual PEC effluent, stp and PEC surface water for the production phase are more likely to be in the range of 1 to mg/l and to 1 mg/l, respectively.
The public demand for color-free waste discharge to receiving waters and tougher color standards have made decolorization of a variety of industrial wastes a top priority. Unfortunately, with the complicated color-causing compounds, the decolorization of these wastes.
Azo dyes are a widespread class of poorly biodegradable industrial pollutants. In anaerobic environments, azo bonds are reductively cleaved yielding carcinogenic aromatic amines, many of which are assumed to resist further metabolism by anaerobes.
Here we report for the first time that an azo dye compound is completely biodegradable in the absence of by: Citations () Chemical- and sediment-mediated reduction of the azo dye 1) Fate of water ý soluble azo dyes in the activated sludge : Malcolm John Hetheridge.
The objective of this study was to determine the partitioning of water soluble azo dyes in the activated sludge process (ASP). Azo dyes are of concern because some of the dyes, dye precursors, and/or their degradation products such as aromatic amines (which are also dye precursors) have been shown to be, or are suspected to be, carcinogenic.
Activated sludge process has been employed as a method of the decontamination of the waste water in dye industries, but it has been considered disadvantageous because of the low decontamination. In order to improve the decontaminating properties, the influences of the composition of the culture medium on the decreases of acid azo dyes and the Cited by: 6.
The full text of this article hosted at is unavailable due to technical by: Fate of water-soluble azo dyes in the activated sludge treatment (Cooper, ) The hi gh degr ee of su lphon ation of azo d yes in Group 1 enhanced their water solubility and limited their.
Get this from a library. Fate of water soluble azo dyes in the activated sludge process: project summary. [Glenn M Shaul; Clyde R Dempsey; Kenneth A Dostal; Water.
Biodegradation of aromatic amines produced from the decolorization of Orange II by zero-valence tin. Fate of water soluble azo dyes in the activated sludge process. Azo. Fate of Azo dyes in sludges. Fate of water-soluble azo dyes in the activated sludge process. Global gene expression profiling in Escherichia coli K The effect of oxygen availability and FNR.
Health Association (APHA) ().Author: Manish M. Jani. The Internet Journal of Microbiology. Volume 7 Number 1. Brown and Hamburger conducted a study on 14 azo dyes subjected to anaerobic sludge digestion followed by aerobic treatment.
T.J Holdsworth, C.R Dempsey, K.A Dostal, Fate of Water Soluble Azo Dyes in Activated Sludge Process. Chemosphere, 2() r Shin KS Cited by: 4. Textile wastewater is difficult to be treated because it contains recalcitrant matters. This study evaluated the performance of an immobilized-cell process using polyethylene glycol media and microbial properties of the immobilized-cells for biodegradation of recalcitrant organics.
The immobilized-cell process could remove hardly-biodegradable soluble COD more than 50% at various Hydraulic Cited by: 2. But this conventional process produces a large amount of sludge which needs adsorption onto activated carbon is also an effective method for color removal.
However, activated carbon may have a very short life, depending on the initial color level and the Dostal KA. Fate of water soluble azo dyes in the activated sludge process.
EPA/ File Size: KB. Treatment of azo dyes with laccase. UV-VIS spectroscopy showed that the azo dyes were decolorized by the enzymatic treatment at different rates. Acid Orange 52 and Direct Blue 71 showed the highest decolorization rates (more than 50% decolorization after 2 h) Cited by: Azo dyes are of concern to environmental regulators because of the widespread production and utilization of these compounds as well as their potential adverse impact to environmental and human health.
The typical line of defense between a dye-laden effluent and a receiving stream, river or other. Ionic Polymer-Coated Laccase with High Activity and Enhanced Stability: Application in the Decolourisation of Water Containing AO7 K. Fate of water-soluble azo dyes in the activated-sludge.
Devi M, Kaushik BD () Decolorization of textile dyes and dye effluent by Aspergillus Spp. Indian J Microbiol Shaul GM, Holdsworth TJ, Dempsey CR, Dostal KA () Fate of water soluble azo dyes in the activated sludge process.
Chemosphere Cited by: 6. Decolorization of Different Textile Dyes by Isolated Aspergillus niger Color removal from cotton textile industry wastewater in an activated sludge system with various additives.
Water Res., Fate of water soluble azo dyes in the activated sludge process. Chemosphere, In particular, azo dyes, which account for % of total dyes of all textile dyestaffs produced (Rodríguez Couto et al., ) are resistant to biodegradation by conventional aerobic activated.
It is generally assumed that sulfonated azo dyes are not degraded under aerobic conditions ().Nevertheless, there have been some reports which suggest a conversion of certain sulfonated azo dyes under aerobic conditions (3, 7, 8, 13, 15).Furthermore, certain carboxylated analogs of sulfonated azo compounds are utilized aerobically as the sole source of carbon and energy by specifically Cited by: Azo dyes account for more than 50% of the dyes used in textile which was purchased from Alvan Sabet Co.
(Hamedan, Iran). This dye is soluble in water and belongs to the cationic basic dye group. The The findings of the present work indicate that pre-adaptation of the activated sludge cultures to the azo dye can improve the rate and the Cited by: 4.
The typical line of defense between a dye-laden effluent and a receiving stream, river or other body of water is an aerobic biological wastewater treatment plant; hence the need for determining the fate of azo dyes undergoing such treatment. Activated sludge pilot plant studies conducted to determine the fate of several azo dyes have been.(1) Shaul GM et al; Fate of Water Soluble Azo Dyes in the Activated Sludge Process USEPA/// (NTIS PB ) () (2) Green,FJ; The Sigma-Aldrich Handbook of Stains, Dyes, and Indicators.
Aldrich Chemical Company, Inc: Milwaukee, WI p. () (3) Lyman WJ et al; Handbook of Chemical Property Estimation Methods.This study investigated the biodegradation performance and characteristics of Sudan I and Acid Orange 7 (AO7) to improve the biological dye removal efficiency in wastewater and optimize the treatment process.
The dyes with different water-solubility and similar molecular structure were biologically treated under aerobic condition in parallel continuous-flow mixed stirred : Shixiong Sheng, Bo Liu, Xiangyu Hou, Bing Wu, Fang Yao, Xinchun Ding, Lin Huang.