Study on color removal of Sewage Treatment Plant (STP) effluent using granular activated carbon

W.R.W Daud,S.A Roces,I Nyoman Widiasa,Anita Nurfida,M.A Hussain,A.C Kumoro,X Rong,A.W Lothongkum,P.T.S Nam,Hadiyanto Hadiyanto,M.T Phong,L Yung

doi:10.1051/matecconf/201815603011

Abstract

Recycling of sewage treatment plant (STP) effluent is one of the attractive solutions to fulfill clean water for hotels and malls in Indonesia. STP effluent has average characteristics as follow: pH 6.8; color (true color) 107 PtCo; A254 (UV absorption) 0.36 cm-1 and COD 35.9 mg/L. Because of high color and organics contents, STP effluent needs further treatment such as activated carbon adsorption. Batch and continuous treatment of synthetic STP effluent by a commercial granular activated carbon (Filtrasorb 300) were investigated. The results show that adsorption capacity of the Filtrasorb 300 for color body of STP effluent was 184 PCU/g of carbon. Langmuir model is appropriate to describe the isotherm adsorption process in this study, with Qm: 476.2 PCU/g of carbon. The results of isotherm adsorption model evaluation, SEM photograph and FTIR analysis show that color adsorption occurred was physical adsoption.

Highlights

Construction of hotels and malls have been increasing enthusiasticly in major cities in Indonesia such as Jakarta, Bandung, Yogyakarta and Bali
Color in Sewage Treatment Plant (STP) effluent is caused by humic substances as a result of contact between water and Natural Organic Matter (NOM) [4]
In the batch process obtained the largest adsorption capacity obtained at 0,5 grams of carbon mass where capacity reached 184 PCU/g of carbon

Summary

Introduction

Construction of hotels and malls have been increasing enthusiasticly in major cities in Indonesia such as Jakarta, Bandung, Yogyakarta and Bali. That phenomenon is not complemented with the availability of fresh water supply. Recycling of Sewage Treatment Plant (STP) effluent is one of the solutions in order to fulfill clean water supply for hotels and malls in Indonesia. Since its color and organic content are still high, advanced wastewater treatment is required. Color in STP effluent is caused by humic substances as a result of contact between water and Natural Organic Matter (NOM) [4]. Dissolved ions in water such as iron (Fe) and manganese (Mn) [5] can contribute the color

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