polyelectrolyte Articles
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A method for visualising polyelectrolyte distribution after polyelectrolyte conditioning of a biotic sludge
Charge neutralisation is an important mechanism in (polyelectrolyte) conditioning of biotic sludges and required for efficient sludge dewatering. Based on results from streaming potential and zeta potential measurements, it has been suggested that charge neutralisation is more complete on the outside of the sludge flocs than on the inside. This paper discusses the development of a technique for ...
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Performance of four polyelectrolytes as flocculation aids in the primary treatment of textile effluents
Samples of textile effluents were subjected to physico-chemical treatment using alum, Polyaluminium Chloride (PAC), and different anionic and cationic acrylamide copolymers. Except for alum, all chemicals were tested individually. Combinations of alum and PAC with different anionic and cationic polyelectrolytes were also tested. Results indicated the anionic polyelectrolyte to be the best polymer ...
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Environmentally friendly cellulose-based polyelectrolytes in wastewater treatment
Natural-based polyelectrolytes (PELs), with all the advantages coming from being produced from renewable and biodegradable sources, are a potential solution for the removal of dyes from wastewater. In this work, surplus Eucalyptus bleached cellulose fibres from a paper mill were modified to increase the charge and solubility of cellulose. First, reactive aldehyde groups were introduced in the ...
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The removal of color and COD from wastewater containing water base color by coagulation process
Abstract: In this study acrylic water base color was removed from synthetic wastewater using coagulation process. Experiments were conducted on the sample containing 100 mg/L and 400 mg/L of acrylic water base color. Destruction of color by means of coagulation/flocculation techniques using ferrous sulfate, alum, lime and polyelectrolyte (cationic, anionic and non ionic).The study was performed ...
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Comparing the flow dynamics and particle settling in full-scale sedimentation tanks of different lengths
The efficiency of sedimentation is dependent on settling tank design and operation, where the streamlined solid–liquid separation results in water of safe potable quality. It is therefore important that the tank design and operation are sufficiently optimised. Sedimentation tanks are commonly overdesigned, leading to unwarranted capital expenditure, and overloading. This study used ...
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Chitosan use in chemical conditioning for dewatering municipal-activated sludge
This work aims to evaluate the potential use of chitosan as an eco-friendly flocculant in chemical conditioning of municipal-activated sludge. Chitosan effectiveness was compared with synthetic cationic polyelectrolyte Sedipur CF802 (Sed CF802) and ferric chloride (FeCl3). In this context, raw sludge samples from Beni-Messous wastewater treatment plant (WWTP) were tested. The classic jar test ...
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Special chemical-physical process treats Tata Steel`s wastewater
Tata Steel Europe manufactures several types of packaging steel. One of the types is Electrolytic Chromium Coated Steel (ECCS). Until recently, a chemical containing chromium-6 was used to manufacture ECCS. Annex XIV of the REACH prohibits the use of chromium-6 with effect from 21 September 2017. It remains possible to apply for an exemption, but only a temporary one. Tata Steel looks to offer ...
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Conventional clarification, role of coagulants & residual test methods.
Disclaimers: – Links to third party websites in this post are not to be considered as Flowlink's endorsement of their products. Turbidity reduction is often necessary to provide water suitable for discharge to the environment or a municipal sewer system. Conventional clarification is the most commonly used process for turbidity reduction. Conventional clarification consists of ...
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