Effect of dosing method and pH on color removal performance

     
effect of dosing method and ph on color removal

Effect of dosing method and pH on color removal

As pH was further dropped to 4, again a higher dosage of alum was required to get a clearer solution (Figs. 4, 5). Similar kind of result was observed using calcium oxide as coagulant. Maximum turbidity removal was witnessed but at a higher dose compared to alum. At both ph 6 and 4, it took 1 g/l of CaO to give 10 NTU on the scale.

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deepdyve - unlimited access to peer-reviewed journals

DeepDyve - Unlimited Access to Peer-Reviewed Journals

DeepDyve is the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

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analysis and optimization of coagulation and flocculation

Analysis and optimization of coagulation and flocculation

The color removal patterns of both alum and chitin were observed to be good at neutral pH, further more chitin has shown moderate efficiency in removing color at both the acidic and basic pH ranges, i.e., at pH 6 and also 8. This may be as a result of resuspension of solids at this concentration.

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performance of alum and assorted coagulants in turbidity

Performance of alum and assorted coagulants in turbidity

As pH was further dropped to 4, again a higher dosage of alum was required to get a clearer solution (Figs. 4, 5). Similar kind of result was observed using calcium oxide as coagulant. Maximum turbidity removal was witnessed but at a higher dose compared to alum. At both ph 6 and 4, it took 1 g/l of CaO to give 10 NTU on the scale.

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the influence of dosing modes of coagulate on arsenic removal

The Influence of Dosing Modes of Coagulate on Arsenic Removal

3.2. Speciation Analysis. The arsenic-borne coagulates were treated following the sequential extraction method to study the arsenic removal mechanisms in different dosing modes [].Figure 3 shows that, in Step I, less than 2% of the arsenic-borne coagulates were extracted for Mode C more than that for Mode B. For Mode A, this number was close to zero.

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water treatment coagulation | water treatment | waste

Water Treatment Coagulation | Water Treatment | Waste

Ferric coagulants may be used in color removal at the high pH values required for the removal of iron and manganese and in softening of water. Reaction between alum and natural constituents of various waters are influenced by many factors, so it is impossible to determine accurately the amount of alum that will react with a given amount of

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treatment of water turbidity and bacteria by using a

Treatment of water turbidity and bacteria by using a

Oxidation using oxygen only reaches an appreciable rate when the pH rises above 9.5 (figure 31). Mn 2+ oxidation using oxygen depends on temperature: oxidation will be 5 times faster when the temperature rises from 11°C to 22°C; however, at normal pH levels, contact times are not easily compatible with industrial operation.. The presence of manganese dioxide "catalyses" the reaction.

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analysis and optimization of coagulation and flocculation

Analysis and optimization of coagulation and flocculation

The color removal patterns of both alum and chitin were observed to be good at neutral pH, further more chitin has shown moderate efficiency in removing color at both the acidic and basic pH ranges, i.e., at pH 6 and also 8. This may be as a result of resuspension of solids at this concentration.

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water handbook - clarification | suez

Water Handbook - Clarification | SUEZ

Optimum pH for turbidity removal is usually much higher than that for color reduction. The presence of sulfate ions can interfere with coagulation for color reduction, whereas calcium and magnesium ions can improve the process and broaden the pH range in which color may be reduced effectively.

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effect of ph on the coagulation performance of al-based

Effect of pH on the coagulation performance of Al-based

At the pH value of 7, the flocculation window is 15.6 to 20.1 ppm and any higher flocculant dose at 15.6 ppm, due to the fact that the high charge density of polyelectrolyte has a negative effect on the efficiency of removal of metal hydroxides formed by the restabilization of suspended solids.

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vodka dosing by 'genetics' and 'stony_corals

Vodka Dosing by 'Genetics' and 'Stony_Corals

Phosphate Removal / Granulated Ferric Oxide (GFO) - One of the most common questions is whether to use a phosphate removal material, such as GFO, with carbon dosing. GFO is useful in removal of phosphates from the water column. Essentially, by carbon source additions, the same net result is

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control of chemical dosing in wastewater treatment - world

Control of chemical dosing in wastewater treatment - World

Figure 3. The trial dosing unit was positioned above the inlet channel some 20 m upstream of the dosing point. The removal of phosphate from the effluent of a sewage works is an essential part of the UK urban wastewater treatment and related directives.

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effect of dissolved co2 on the ph of water | science

EFFECT OF DISSOLVED CO2 ON THE pH OF WATER | Science

EFFECT OF DISSOLVED CO 2 ON THE p H OF WATER. By Harold T. Byck. See all Hide authors and affiliations. Science 19 Feb 1932: Vol. 75, Issue 1938, pp. 224 DOI: 10.1126/science.75.1938.224 . Article; Info & Metrics; eLetters; PDF; This is a PDF-only article. The first page of the PDF of this article

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effects of ph on coagulation behavior and floc properties

Effects of pH on coagulation behavior and floc properties

Enhanced coagulation is one of the major methods to control disinfection by-products (DBPs) in water treatment process. Coagulation pH is an important factor that affects the enhanced coagulation. Recently, many studies focus on the coagulation effects and mechanisms, and few researchers studied the properties of flocs formed under different coagulation pH.

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drinking water treatment – ph adjustment – drinking water

Drinking Water Treatment – pH Adjustment – Drinking Water

About pH . pH is an indicator of the acid or alkaline condition of water. The pH scale ranges from 0-14; 7 indicates the neutral point. The normal pH range of drinking water is 6 – 8.5. The pH is mostly a result of natural geological conditions at the site and the type of minerals found in the local rock. The pH can also be affected by acid rain.

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ph adjustment and neutralization, the basics

pH Adjustment and Neutralization, the basics

The curve above is the actual titration results of the pH Adjustment of an acid (HCl) with a beginning pH of 2.0 and an ending pH of 11.0. Dilute Sodium Hydroxide (NaOH) was used as the neutralizing agent. A brief glance at the curve indicates that the process of pH neutralization or pH adjustment is not particularly easy.

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enhanced removal of heavy metals in primary treatment

Enhanced Removal of Heavy Metals in Primary Treatment

In the present study, a series of jar test was conducted to evaluate the optimum pH, dosage and performance parameters for coagulants alum and calcium chloride. Phosphorus removal by alum was found to be highly pH dependent with an optimum pH of 5.7-6. At this pH an alum dosage of 80 mg/l removed 83 % of the total phosphorus.

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chemical pretreatment for ro and nf

Chemical Pretreatment For RO and NF

Pulsing Xenia seem to pulse at their finest around a pH of 8.3, which makes a great visual monitor for checking the pH if you can keep up with the evasiveness of the animal. The pH is generally manipulated with dosing calcium and alkalinity. Alkalinity helps keep the pH from getting way too low at night. Magnesium is the underdog of parameters.

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