Improving the Effi ciency of a Coagulation-Flocculation Wastewater Treatment of the Semiconductor Industry through Zeta Potential Measurements

2015 ◽  
pp. 192-221
Keyword(s):  
Wastewater Treatment ◽  
Zeta Potential ◽  
Semiconductor Industry ◽  
Effi Ciency

scholarly journals Improving the Efficiency of a Coagulation-Flocculation Wastewater Treatment of the Semiconductor Industry through Zeta Potential Measurements

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Eduardo Alberto López-Maldonado ◽  
Mercedes Teresita Oropeza-Guzmán ◽  
Adrián Ochoa-Terán
Keyword(s):  
Wastewater Treatment ◽  
Zeta Potential ◽  
Semiconductor Industry ◽  
Physicochemical Characteristics ◽  
Treatment Conditions ◽  
International Regulations ◽  
Key Factor ◽  
Dosing Strategy ◽  
The Right ◽  
Ph Variations

Efficiency of coagulation-flocculation process used for semiconductor wastewater treatment was improved by selecting suitable conditions (pH, polyelectrolyte type, and concentration) through zeta potential measurements. Under this scenario the zeta potential,ζ, is the right parameter that allows studying and predicting the interactions at the molecular level between the contaminants in the wastewater and polyelectrolytes used for coagulation-flocculation. Additionally, this parameter is a key factor for assessing the efficiency of coagulation-flocculation processes based on the optimum dosages and windows for polyelectrolytes coagulation-flocculation effectiveness. In this paper, strategic pH variations allowed the prediction of the dosage of polyelectrolyte on wastewater from real electroplating baths, including the isoelectric point (IEP) of the dispersions of water and commercial polyelectrolytes used in typical semiconductor industries. The results showed that there is a difference between polyelectrolyte demand required for the removal of suspended solids, turbidity, and organic matter from wastewater (23.4 mg/L and 67 mg/L, resp.). It was also concluded that the dose of polyelectrolytes and coagulation-flocculation window to achieve compliance with national and international regulations as EPA in USA and SEMARNAT in Mexico is influenced by the physicochemical characteristics of the dispersions and treatment conditions (pH and polyelectrolyte dosing strategy).

scholarly journals Investigation of Mineral-Processing Wastewater Recycling Processes: A Pilot Study

2018 ◽  
Vol 10 (9) ◽  
pp. 3069 ◽  
Author(s):  
Jin Park ◽  
Young-Soo Han ◽  
Sang-Woo Ji
Keyword(s):  
Wastewater Treatment ◽  
Pilot Study ◽  
Zeta Potential ◽  
Fresh Water ◽  
Pilot Plant ◽  
Mineral Processing ◽  
Treated Water ◽  
Remote Locations ◽  
Sludge Recycling ◽  
Wastewater Recycling

Mineral processing requires large amounts of water, but, often in the remote locations of many mines, sufficient fresh water frequently cannot be supplied. Therefore, recycling of water is important in mineral processing and enhancing the efficiency of the liquid-solid separation and dewatering steps in mineral processing wastewater treatment is critical. The objectives of the study were to evaluate the effect of anionic flocculant dosage and sludge recycling (SR) on solid removal and sludge dewaterability. Different combinations of the flocculant dosage with and without SR were applied in a mineral-processing wastewater treatment pilot plant. Increasing the amount of flocculant dose of 1.1% v/v (flocculant solution to wastewater) did not significantly decrease the turbidity of the treated water, while the combination of a flocculant with SR increased the zeta potential. Increasing flocculant dose adversely affected dewaterability, although the dewaterability of the 0.6% v/v flocculant-treated sludge significantly increased after aging of the sludge. Sludge recycling was effective for increasing the dewaterability, and a flocculant dose of 1.1% v/v with SR led to formation of large flocs that were stable during aging and sonication.

scholarly journals Proposed Wastewater Treatment Plant for a Paper Mill

2012 ◽  
Vol 11 ◽  
pp. 25-28
Author(s):  
Arshad Ali ◽  
Muhammad Jawed Iqbal
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Environmental Problem ◽  
Treatment Plant ◽  
Paper Mill ◽  
Uasb Reactor ◽  
Plant Design ◽  
Pollution Load ◽  
Effi Ciency ◽  
Wastewater Samples

The decline in the availability and alarming pollution of the existing water resources is the major environmental problem of third-world countries. The main reason of water pollution is the disposal of untreated industrial effl uents. This study was designed to evaluate the pollution load caused by a paper mill, and to propose a wastewater treatment plant design, based on the analyses of wastewater samples. The wastewater samples were collected from the local paper mill for a period of more than four months on a regular basis. The pH, temperature, color, TSS, TDS, BOD, COD and AOX were measured as, 8.1, 23°C, 2,431 PtCo unit, 956 mg/L, 3,046 mg/L, 1,582 mg/L, 2,492 mg/L and 19.81 mg/L, respectively. Based on the data obtained, the wastewater treatment plant consisting of a screening chamber, primary sedimentation tank and a UASB reactor was designed. It was concluded that the treatment effi ciency of more than 75% removal of BOD and COD concentrations could be accomplished. The treatment plant will also be able to produce 2,200 m3/day of biogas.DOI: http://dx.doi.org/10.3126/hn.v11i0.7157 Hydro Nepal Vol.11 2011 pp.25-28

TESTING OF COAGULATING PROPERTIES OF TITANIFEROUS SLUDGE

2015 ◽  
Vol 5 (2) ◽  
pp. 54-59 ◽  
Author(s):  
Larisa Guramovna SPIRIDONOVA
Keyword(s):  
Wastewater Treatment ◽  
Process Modeling ◽  
Industrial Wastewater ◽  
Structure And Properties ◽  
Industrial Wastewater Treatment ◽  
Effi Ciency ◽  
Industrial Sewage

The article is devoted to the issues of industrial wastewater treatment using reagents received from productions wastes. The structure and properties of waste formed by production of titanium products containing ions of the titan, aluminum and iron are investigated. Modeling the process of receiving the reagent based on titanium sludge is made, its coagulating properties are investigated. During receiving process, modeling special att ention is paid to removal of the fl uorides, which are present at sludge. Effi ciency of the received titanic coagulant in comparison with known «Аква-АуратТМ30» reagent is shown. It is experimentally confi rmed that for production of a coagulant it is necessary to use the sludge, which is selected, in a place of its direct education. It is made a conclusion about the possibility of titanium sludge use for receiving reagent and its further use for purifi cation of industrial sewage.

scholarly journals CLEANING OF OIL-CONTAINING WASTEWATER

2018 ◽  
Vol 8 (4) ◽  
pp. 24-28
Author(s):  
Anastasya O. BYSTRANOVA ◽  
SvetlanaYu. Yur'evna TEPLYKH ◽  
Evgeniy A. TEPLYKH
Keyword(s):  
Wastewater Treatment ◽  
Oil Extraction ◽  
Model Solution ◽  
Analytical Dependence ◽  
Extraction Plant ◽  
Technological Processes ◽  
Effi Ciency

The regularities of changes in the composition of wastewater, methods of cleaning and technological schemes of the oil extraction industry and the processes of formation of wastewater of the oil extraction plant CJSC Samaraagroprompererabotka and their chemical and physical indicators are studied. The eff ectiveness of wastewater treatment by reagent methods using known, analog and new reagents, on a model solution was investigated. An analytical dependence describing the processes of increasing the effi ciency of new technological processes (discrete and binary) reagent purifi cation has been carried out. The economic effi ciency of the proposed methods for treating oil-fat-containing wastewater is determined.

scholarly journals CLASSIFICATION OF SORBENTS USED IN TECHNOLOGIES FOR PURIFICATION OF WASTE WATER FROM PETROLEUM PRODUCTS

2020 ◽  
Vol 10 (3) ◽  
pp. 26-34
Author(s):  
Elena S. MALYSHKINA
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Informed Choice ◽  
Petroleum Products ◽  
Oil Products ◽  
Environmental Friendliness ◽  
Pine Sawdust ◽  
Effi Ciency ◽  
Special Algorithm

Currently, there is no a generally accepted classifi cation of the sorbents used in the technologies for wastewater treatment from oil products. The purpose of this work is to more fully systematize the sorbents used in wastewater treatment, depending on their main characteristics, as well as on the economy and environmental friendliness. Based on the existing classifi cations, the generalized classifi cation of the sorbents designed for wastewater treatment from oil products in the dissolved and emulsifi ed forms, and additionally in the fi lm form, was developed and supplemented with the new parameters. A special algorithm, that allows one to make an informed choice of the sorbent in terms of its application effi ciency, environmental protection and material costs, is formed. In this regard, as an example, the classifi cation of pine sawdust has been performed. It can be considered as an eff ective sorbent base.

scholarly journals Stability of colloidal systems - a review of the stability measurements methods

2017 ◽  
Vol 72 (1) ◽  
pp. 33
Author(s):  
Jakub Matusiak ◽  
Elżbieta Grządka
Keyword(s):  
Wastewater Treatment ◽  
Zeta Potential ◽  
Colloidal Systems ◽  
Density Measurements ◽  
Factors Influencing ◽  
Opposite Process ◽  
The Stability ◽  
Stability Measurements

<p>The stability of colloidal systems is very important in numerous already existing and new formulations. In most cases if such systems are not characterized by an appropriate stability they can not find any useful applications. The opposite process to the stabilization is the flocculation. Generally, it is undesirable. However, in a few cases the flocculation is very useful, for example in  the wastewater treatment. That is why the methods used to determine stabilizing-flocculating properties of the colloidal systems are of significant importance.</p><p>The paper describes types of stability and flocculation as well as the factors influencing those processes, e.g. the addition of polymers or surfactants. The methods presented in this paper are UV-VIS spectrophotometry,  turbidimetry, zeta potential and density measurements.</p>

Coagulation–flocculation mechanisms in wastewater treatment plants through zeta potential measurements

2014 ◽  
Vol 279 ◽  
pp. 1-10 ◽  
Author(s):  
E.A. López-Maldonado ◽  
M.T. Oropeza-Guzman ◽  
J.L. Jurado-Baizaval ◽  
A. Ochoa-Terán
Keyword(s):  
Wastewater Treatment ◽  
Zeta Potential ◽  
Wastewater Treatment Plants ◽  
Flocculation Mechanisms

Novel Composite Flocculent Ployferric Chloride- Polydimethyldiallylammonium Chloride (PFC-PDMDAAC): Its Characterization and Flocculation efficiency

2006 ◽  
Vol 1 (3) ◽  
Author(s):  
Y. Wang ◽  
B.Y. Gao ◽  
Q.Y Yue ◽  
J.C. Wei ◽  
W.Z. Zhou
Keyword(s):  
Wastewater Treatment ◽  
Surface Water ◽  
Zeta Potential ◽  
Spectroscopy Method ◽  
Water And Wastewater Treatment ◽  
Actual Surface ◽  
Flocculation Efficiency ◽  
Fe Species ◽  
Water And Wastewater ◽  
Wastewater Samples

In this study, a new composite flocculent was prepared from polyferric chloride (PFC) and polydimethyldiallylammonium chloride (PDMDAAC). The Fe( ) species and zeta potential of the composite flocculent (PFC-PDMDAAC) and PFC were measured by a timed complexation spectroscopy method and the malvern Zetasizer 3000, respectively. The flocculation efficiency of PFC-PDMDAAC for treating actual surface water or wastewater samples was compared with that of PFC. The results showed that when PDMDAAC fraction (Wp) is 7.0%, PFC-PDMDAAC contains the smallest content of Fec and has the highest zeta potential. PFC-PDMDAAC is more effective than PFC and PDMDAAC in water and wastewater treatment. Therefore, the use of PFC-PDMDAAC is both technically and economically feasible in water and wastewater treatment.

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