Zinc Removal from ZnO Industrial Wastewater by Hydroxide Precipitation and Coagulation Methods: The Role of pH and Coagulant Dose

Jurnal Riset Teknologi Pencegahan Pencemaran Industri

View Publication Info
 
 
Field Value
 
Title Zinc Removal from ZnO Industrial Wastewater by Hydroxide Precipitation and Coagulation Methods: The Role of pH and Coagulant Dose
 
Creator Ratnawati, Ratnawati
 
Subject Zn
pH
coagulant
turbidity
COD
 
Description Liquid waste from the ZnO industry must be treated to meet the quality standards of wastewater into water bodies, according to the Minister of Environment Regulations No.5, 2014. It still contains 79 mg/L of Zn metal, cloudy with turbidity above 500 NTU, and COD value around 222 mg/L. This study aims to determine the effect of pH on reducing Zn metal and the coagulant dose to minimize turbidity and COD in liquid waste produced by the ZnO factory in Depok, West Java. The waste treatment has been carried out by adding alkaline to neutralize the acid conditions in the equalization basin. However, the results have not met the requirements. It is necessary to vary the pH (8.5; 9.0; 9.5; 10.0 and 10.5) to precipitate of Zn optimally, modify the dose of coagulants (50; 100 and 150 mg/L) and reaction times (10; 15 and 20 minutes) to reduce its turbidity and COD concentration. The best results were obtained at a pH of 9.5 with a coagulant dose of 50 mg/L and a reaction time of 10 minutes. This condition can reduce Zn concentration (79 to 3.71 mg/L), turbidity (557 to 1.42 NTU), COD (222 to 68 mg/L) with a removal efficiency of 95.3%; 99.7%; and 69.4% respectively. These values have met the standard requirements according to government regulations.
 
Publisher Balai Besar Teknologi Pencegahan Pencemaran Industri
 
Date 2020-11-19
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
 
Format application/pdf
 
Identifier http://jrtppi.id/index.php/jrtppi/article/view/87
10.21771/jrtppi.2020.v11.no2.p35-42
 
Source Jurnal Riset Teknologi Pencegahan Pencemaran Industri; Vol. 11 No. 2 (2020); 35-42
2503-5010
2087-0965
10.21771/jrtppi.2020.v11.no2
 
Language eng
 
Relation http://jrtppi.id/index.php/jrtppi/article/view/87/75
 
Rights Copyright (c) 2020 Jurnal Riset Teknologi Pencegahan Pencemaran Industri
https://creativecommons.org/licenses/by-nc-sa/4.0
 

Contact Us

The PKP Index is an initiative of the Public Knowledge Project.

For PKP Publishing Services please use the PKP|PS contact form.

For support with PKP software we encourage users to consult our wiki for documentation and search our support forums.

For any other correspondence feel free to contact us using the PKP contact form.

Find Us

Twitter

Copyright © 2015-2018 Simon Fraser University Library