coagulant analyzer Articles

Stop the hit and miss in coagulation-flocculation: AppliTek’s charge density analyzer to reduce polymer dosing

Specialist manufacturer AppliTek NV has the pleasure to announce its latest analytical solution, called EZ-Charge®, for reducing the potentially skyrocketing costs that come with controlling the amount of suspended solids in waste water treatment. The novel water analyzer has been developed in cooperation with AQRatio (Germany), a company specialized in sewage sludge analysis and control. ...

Apr. 10, 2017

By AppliTek NV
Application performance of a new coagulant in wastewater reuse

Ultraviolet (UV) absorption characteristics of poly-Al-Zn-Fe (PAZF), a polymerized coagulant containing three kinds of metallic elements prepared from a galvanized-aluminum slag, was analyzed by UV-visible spectrophotometry during its polymerization process. Pollutant removal by PAZF in treating various wastewaters was investigated, in comparison with that of polyaluminum chloride (PAC). The ...

Feb. 2, 2016

By IWA Publishing
On-line optical determination of floc size of Fe(III) coagulants

This study investigated the floc aggregation, average floc size, floc size variance and floc growth velocity when ferric chloride (FeCl3) and polyferric chloride (PFC) were used to treat the simulated water samples. The factors including coagulant dose, ionic strength and solution pH, which affect the floc aggregation, were studied. Experiments were carried out in a bench-scale reactor using ...

Feb. 27, 2007

By IOS Press
Optimization of aeration conditions in the hybrid process of coagulation-ultrafiltration with air sparging

To optimize the aeration conditions in the hybrid process of coagulation-ultrafiltration with air sparging, a series of air flow rates under continuous and intermittent sparging were investigated. The water quality characteristics that surrounded membranes, bubble characteristics, fouling resistances, and energy consumption under different aeration conditions were analyzed. The results showed ...

Oct. 19, 2017

By IWA Publishing
Rheological and electrical properties used to investigate the coagulation process during sludge treatment

Analyses of rheological properties and electrical conductivity (σdc) at direct current have been employed in order to investigate the effects of calcium oxide on the coagulation process during sludge treatment in the textile industry. In this context, rheological and electrical measurements were performed on five samples – one that contained raw sludge and the other four that were ...

Oct. 23, 2017

By IWA Publishing
Pretreatment of concentrated leachate by the combination of coagulation and catalytic ozonation with Ce/AC catalyst

A raw concentrated leachate produced from membrane bioreactor-nanofiltration (MBR-NF) was taken from Chengdu Chang'an Waste Landfill Site, China. The major fraction of this concentrated leachate was large refractory humic substances. A coagulation–ozonation process was applied to treat this leachate, aiming at enhancing chemical oxygen demand (COD) removal efficiency and increasing its ...

Oct. 9, 2015

By IWA Publishing
Flocs' re-growth characteristics in circulation coagulation–membrane filtration process

Membrane fouling can be significantly mitigated through circulating coagulation, floc breakage and re-growth under appropriate conditions. In this study, unified membrane filtration index (UMFI) was adopted to analyze the membrane fouling. The effect of circulating coagulation pretreatment on both flocs' average diameter and membrane fouling were investigated under different ...

May 11, 2015

By IWA Publishing
Studies relating to an electrochemically assisted coagulation for the removal of chromium from water using zinc anode

In this work, an electrochemically assisted coagulation for the removal of chromium from water has been studied using zinc as anode and galvanized iron as cathode. The effects of pH, current density, concentration of chromium, temperature, adsorption kinetics and isotherms on the removal of chromium were investigated. The results showed that the optimum removal efficiency of 96.5% was achieved at ...

Jan. 1, 2011

By IWA Publishing
Magnesium hydroxide coagulation performance and floc properties in treating high pH reactive orange wastewater

Application of magnesium hydroxide as a coagulant for treating high pH reactive orange wastewater was studied. The coagulation performance and magnesium hydroxide-reactive orange floc properties were investigated under different dosages, feeding modes and pH values. Flocculation index (FI) was then discussed with controlled experiments using an intelligent particle dispersion analyzer and ...

May 7, 2015

By IWA Publishing
Using magnetic powder to enhance coagulation membrane filtration for treating micro-polluted surface water

The magnetic enhanced coagulation membrane filtration (MECMF) process was introduced into micro-polluted surface water treatment. The process was conducted by adding magnetic powder (MP) for enhancing coagulation. By contrasting the water quality parameters including dissolved organic carbon (DOC), UV254 and turbidity of permeates of MECMF and coagulation/flocculation membrane filtration ...

Aug. 8, 2015

By IWA Publishing
Techno-economical evaluation of nitrate removal using continuous flow electro-coagulation process: optimization by Taguchi model

This study aims to investigate the effect of the main parameters on the performance of a continuous flow electro-coagulation (EC) process for nitrate removal efficiency and its operating costs. For this purpose, the Taguchi experimental design with orthogonal array L27 (313) was applied to analyze the effects of selected parameters, namely initial nitrate concentration, inlet flow rate, ...

May 6, 2017

By IWA Publishing
Coagulation-adsorption of reactive orange from aqueous solution by freshly formed magnesium hydroxide: mixing time and mechanistic study

The utilization of magnesium hydroxide was successfully carried out to remove reactive orange by coagulation-adsorption from aqueous solution. The coagulation-adsorption mechanisms and magnesium hydroxide-reactive orange floc property were analyzed through zeta potential, scanning electron microscope (SEM), X-ray diffraction and Fourier transform infrared spectroscopy (FT-IR). Flocculation ...

Jan. 27, 2017

By IWA Publishing
Online Analyzers Improve Control of Chloramination Processes in Milwaukee

The Milwaukee Water Works is a national leader in providing high quality drinking water and monitoring water quality. Since 1998, it has invested $227 million in its infrastructure, from treatment plants to distribution systems, to ensure high quality drinking water and reliable supply. The Milwaukee Water Works treats Lake Michigan water with Ozone gas as a primary disinfectant because it ...

Oct. 1, 2010

By ASA Analytics
Anion exchange pretreatment for the removal of natural organic matter from humic rich water

The treatment of humic rich water using anion exchange, coagulation and PAC-adsorption was studied, both independently and in sequence in that order. The commercial aluminium-based coagulant PAX-16, powdered activated carbon W35 and the magnetic ion exchange resin (MIEX®) were used in the study. The source of humic substances was natural water (25.0 g C/m3 as DOC) flowing out from the Great ...

Dec. 1, 2011

By IWA Publishing
Effects of recycling flocculation membrane filtration on drinking water treatment

Recycling flocculation membrane filtration (RF-MF) and coagulation membrane filtration (C-MF) were investigated for removal of natural organic matter (NOM) from Luan river in this study. The effectiveness of recycling flocculation pretreatment on both NOM removal and membrane filtration were assessed under different concentrations of coagulant and reflux flocs. Under the conditions of coagulant ...

Oct. 21, 2013

By IWA Publishing
Sizes of particles formed during municipal wastewater treatment

Volumetric diameters Dv and specific surface area SpS of sludge particles formed during chemical coagulation and electrocoagulation of sewage were determined. The obtained aggregate-flocs differed substantially in both Dv and SpS values. The differences in Dv and SpS values of the analyzed particles were ...

Dec. 13, 2016

By IWA Publishing
Integrated Engineers Case Study: Circuit Board Manufacturer

A circuit board manufacturer in southern California was not able to achieve the discharge levels of copper and nickel with their existing system of coagulant, anionic and cationic flocculants and metal precipitant treatment process followed by lamella plate clarification. The previous treatment process developed a settled sludge that had poor shear characteristics and required further coagulant ...

May 8, 2007

By Integrated Engineers Inc.
Soil aquifer treatment using advanced primary effluent

Soil aquifer treatment (SAT) using primary effluent (PE) is an attractive option for wastewater treatment and reuse in many developing countries with no or minimal wastewater treatment. One of the main limitations of SAT of PE is rapid clogging of the infiltration basin due to high suspended solid concentrations. Some pre-treatment of PE before infiltration is likely to reduce this limitation, ...

Jan. 1, 2011

By IWA Publishing
Removal of Giardia spp. and Cryptosporidium spp. from water supply with high turbidity: analytical challenges and perspectives

Giardia and Cryptosporidium species are a serious problem if present in water supplies. The removal of these protozoans and the adaptation of existing protocols are essential for supplying drinking water to developing countries. Considering this, the aim of this study is to evaluate, on a bench level, the removal of Giardia spp. cysts and of ...

Dec. 18, 2015

By IWA Publishing
City of Houston Total Organic Carbon - Case Study

ABSTRACT The City of Houston, Texas has been aware of the implications that current and pending regulatory standards would have on the operation of their four surface water treatment facilities. In particular, the City has closely monitored changes in regulations related to enhanced coagulation, total organic carbon (TOC) removal, and disinfection by-products (DBP) reduction. The ...

Mar. 2, 2015

By TOC Systems, Inc.

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