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Alkaline wastewater with acid

Established in 2001, Puyang Zhong Yuan Restar Petroleum Equipment Co.,Ltd, “RSD” for short, is Henan’s high-tech enterprise with intellectual property advantages and independent legal person qualification. With registered capital of RMB 50 million, the Company has two subsidiaries-Henan Restar Separation Equipment Technology Co., Ltd We are mainly specialized in R&D, production and service of various intelligent separation and control systems in oil&gas drilling,engineering environmental protection and mining industries.We always take the lead in Chinese market shares of drilling fluid shale shaker for many years. Our products have been exported more than 20 countries and always extensively praised by customers. We are Class I network supplier of Sinopec,CNPC and CNOOC and registered supplier of ONGC, OIL India,KOC. High quality and international standard products make us gain many Large-scale drilling fluids recycling systems for Saudi Aramco and Gazprom projects.

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Alkaline wastewater with acid
Textiles wastewater treatment technology: A review - Deng ...
Textiles wastewater treatment technology: A review - Deng ...

The results obtained demonstrated that SYF‐1 yeast was able to decolorize all the six different ,azo, dyes, and among them, ,Acid, Red B (ARB) ,dye, was removed at highest efficiency. The optimum decolorization efficiency of ARB ,dye, was achieved at 0.6 g/L of ammonium sulfate, glucose concentration of 4.0 g/L, NaCl concentration of ≤30 g/L, ,pH, of 7.0–8.0, temperature at 30°C, and a rotation ...

Toxicity of Disperse Dyes and its Removal from Wastewater ...
Toxicity of Disperse Dyes and its Removal from Wastewater ...

The solubility of dye is mainly affected by change in pH concentration of the solution. Namasivayam and Kavitha 111 examined the effect of pH on the removal of direct dye (Congo red) by using orange peel as an adsorbent. The maximum removal (76.6%) was observed at pH 5.0 minimum (49%) at pH 12.0.

A review on the sustainability of textile industries ...
A review on the sustainability of textile industries ...

The ,wastewater, contains not only the colored ,dye, but also other metallic particles, high fluctuating ,pH,, suspended solids with high chemical oxygen demand (COD), etc. , . Therefore, today, the textile ,wastewater, from the textile and dyeing industries causes major concern with regard to the treatment of textile ,wastewater,.

(PDF) Biodegradation of azo dye compounds
(PDF) Biodegradation of azo dye compounds

10/10/2014, · ,Azo dye, stability causes it to remain in water bodies for a long time, causing problems to the ecosystem. ,Azo dye, in concentration as low as 1 ppm is visible, and textile processing ,wastewater, ...

Degradation of Synthetic Azo Dyes of Textile Industry: a ...
Degradation of Synthetic Azo Dyes of Textile Industry: a ...

18/9/2017, · As textile industrial effluent contains a significant amount of ,dye, with many toxic metals, it increases ,pH,, BOD, and COD [ 14, 15] in the water body where it is released. It also disbalances organic-inorganic chemical content of the environment and is affective for the biotic content present in water.

Textiles wastewater treatment technology: A review - Deng ...
Textiles wastewater treatment technology: A review - Deng ...

The results obtained demonstrated that SYF‐1 yeast was able to decolorize all the six different ,azo, dyes, and among them, ,Acid, Red B (ARB) ,dye, was removed at highest efficiency. The optimum decolorization efficiency of ARB ,dye, was achieved at 0.6 g/L of ammonium sulfate, glucose concentration of 4.0 g/L, NaCl concentration of ≤30 g/L, ,pH, of 7.0–8.0, temperature at 30°C, and a rotation ...

Studies on Photocatalytic Degradation of Azo Dye Acid Red ...
Studies on Photocatalytic Degradation of Azo Dye Acid Red ...

99% of the dye Acid red -18 into non toxic and biodegradable simpler molecules by degrading azo bonds in 160 minutes at pH 7.5, temperature 303K and the system follow first order kinetics, the value of rate constant k is 2.33 ×10-2min-1. Keywords: Photocatalyst, Photocatalysis, Dowex-11, Acidred-18, Degradation. Introduction

Pollution Control In Dye Industry | CivilDigital
Pollution Control In Dye Industry | CivilDigital

20/5/2013, · SO2 is produced when borohydride is used in combination with bisulfite catalysis in the ,pH, rang e of 5 – 8 which readily reduces ,azo, dyes The utility of this process involving a variety of ,azo, dyes, giving percent colour reduction of 83-99% for ,acid,, direct, and reactive dyes and 74-99.9% for metalized direct and phthalocyanine dyes

A review on the sustainability of textile industries ...
A review on the sustainability of textile industries ...

1/6/2018, · The ,wastewater, contains not only the colored ,dye, but also other metallic particles, high fluctuating ,pH,, suspended solids with high chemical oxygen demand (COD), etc. , . Therefore, today, the textile ,wastewater, from the textile and dyeing industries causes major concern with regard to the treatment of textile ,wastewater,.

Biosorption of Acid Dyes by Non-living Aquatic Macrophyte ...
Biosorption of Acid Dyes by Non-living Aquatic Macrophyte ...

The effect of initial pH was determined by agitation 0.4 g of the pre-treated biomass and 200 mL of dye solution concentration 40 mg L-1 using shaker at different the initial pH range from pH 2 to pH 9 at 25°C.

Textiles wastewater treatment technology: A review - Deng ...
Textiles wastewater treatment technology: A review - Deng ...

The results obtained demonstrated that SYF‐1 yeast was able to decolorize all the six different ,azo, dyes, and among them, ,Acid, Red B (ARB) ,dye, was removed at highest efficiency. The optimum decolorization efficiency of ARB ,dye, was achieved at 0.6 g/L of ammonium sulfate, glucose concentration of 4.0 g/L, NaCl concentration of ≤30 g/L, ,pH, of 7.0–8.0, temperature at 30°C, and a rotation ...

Studies on Photocatalytic Degradation of Azo Dye Acid Red ...
Studies on Photocatalytic Degradation of Azo Dye Acid Red ...

99% of the ,dye Acid, red -18 into ,non, toxic and biodegradable simpler molecules by degrading ,azo, bonds in 160 minutes at ,pH, 7.5, temperature 303K and the system follow first order kinetics, the value of rate constant k is 2.33 ×10-2min-1. Keywords: Photocatalyst, Photocatalysis, Dowex-11, Acidred-18, Degradation. Introduction

Toxicity and Fate of Azo Dyes Danish Environmental ...
Toxicity and Fate of Azo Dyes Danish Environmental ...

Shu et al. (1994) demonstrated photo-oxidation (UV/H 2 O 2--photo chemical reactor) of two ,non,-biodegradable ,azo, dyes in ,waste water, (,Acid, Red 1* and ,Acid, Yellow 23*). It was observed that the decomposition of both ,azo, dyes was pseudo-first order reactions with respect to ,azo dye, concentrations.

Dye - Wikipedia
Dye - Wikipedia

Usually acetic ,acid, is added to the ,dye, bath to help the uptake of the ,dye, onto the fiber. Basic dyes are also used in the coloration of paper . Direct or substantive dyeing is normally carried out in a neutral or slightly alkaline ,dye, bath, at or near boiling point , with the addition of either sodium chloride (NaCl) or sodium sulfate (Na 2 SO 4 ) or sodium carbonate (Na 2 CO 3 ).

Brief History of Dyes - Assignment Point
Brief History of Dyes - Assignment Point

As the rate of degradation is ,pH, dependent, and the optimum pHrange is 3-5, so the ,pH, of the ,dye, solution was kept » 3 throughout the investigation. Higher (%) degradation is obtained as time goes on but after a certain period the change is very negligible.

Effective Treatment Systems for Azo Dye Degradation: A ...
Effective Treatment Systems for Azo Dye Degradation: A ...

For example, 0.6–0.8 kg NaCl, 30–60 g dyestuff and 70–150 L water are necessary to ,dye, 1 kg of cotton with reactive dyes; the ,wastewater, produced has 20–30% of the applied unfixed reactive dyes, with an average concentration of 2000 ppm, high salt content and dyeing auxiliaries [13].

Degradation of Synthetic Azo Dyes of Textile Industry: a ...
Degradation of Synthetic Azo Dyes of Textile Industry: a ...

18/9/2017, · As textile industrial effluent contains a significant amount of ,dye, with many toxic metals, it increases ,pH,, BOD, and COD [ 14, 15] in the water body where it is released. It also disbalances organic-inorganic chemical content of the environment and is affective for the biotic content present in water.

Effective Treatment Systems for Azo Dye Degradation: A ...
Effective Treatment Systems for Azo Dye Degradation: A ...

For example, 0.6–0.8 kg NaCl, 30–60 g dyestuff and 70–150 L water are necessary to ,dye, 1 kg of cotton with reactive dyes; the ,wastewater, produced has 20–30% of the applied unfixed reactive dyes, with an average concentration of 2000 ppm, high salt content and dyeing auxiliaries [13].

A Review Biotechnological removal of color and dye from ...
A Review Biotechnological removal of color and dye from ...

Due to the highly variable nature of biological treatment systems and especially textile effluents, there are a number of factors that may affect the biodegradation rate of ,azo, dyes. ,Non,-,dye, related parameters such as temperature, ,pH,, dissolved oxygen or nitrate concentrations, type and source of reduction equivalents, bacteria consortium, and cell permeability can all affect the biodegradation of ,azo, dyes …

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