Application of combination of coagulation-flocculation and membrane separation processes for tofu industrial wastewater treatment

Rachman Surachman, Sutrasno Kartohardjono

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Tofu is one of the popular foods consumed by Indonesians, however in the making process produced much wastewater, which is usually directly discharged into the river. This study aims to evaluate the effectiveness of coagulation-flocculation and membrane processes to treat the tofu wastewater in order to meet the government regulation for discharged wastewater. The coagulant agent used was alum, while the membrane process involved ultrafiltration (UF) and reverse osmosis (RO) processes. Experimental results showed that the effectiveness of coagulation increased with the addition of a coagulant dose until the optimal dose is reached at 300 ppm. The similar phenomena with Trans Membrane Pressure (TMP) in the UF process which showed an increase in effectiveness to 1 bar, and the rejection rate decreased as TMP across the UF membrane increased. The lowest concentrations of TSS, turbidity, TDS, COD and BOD in the final product of processed water after RO process were 0 mg/L, 0 FAU, 3.0 mg/L, 9.8 mg/L and 16 mg/L, respectively, which are far below the government regulation so that it can be disposed directly into the river.

Original languageEnglish
Title of host publicationRecent Progress on
Subtitle of host publicationEnergy, Communities and Cities - Proceedings of International Symposium on Sustainable and Clean Energy, ISSCE 2019: Quality in Research 2019
EditorsYuliusman Yuliusman, Cindy Dianita
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735419896
DOIs
Publication statusPublished - 4 May 2020
Event16th International Conference on Quality in Research, QiR 2019 - 2019 International Symposium on Sustainable and Clean Energy, ISSCE 2019 - Padang, Indonesia
Duration: 22 Jul 201924 Jul 2019

Publication series

NameAIP Conference Proceedings
Volume2230
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference16th International Conference on Quality in Research, QiR 2019 - 2019 International Symposium on Sustainable and Clean Energy, ISSCE 2019
CountryIndonesia
CityPadang
Period22/07/1924/07/19

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