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All Journal Reaktor Jurnal Sains Dan Teknologi Lingkungan Jurnal Sains & Teknologi Lingkungan Specta Journal of Technology Indonesian Journal of Multidisciplinary Science Asian Journal of Social and Humanities

Gabriel Andari Kristanto

Fakultas Teknik, Universitas Indonesia, Indonesia

Author-ID : 471676

Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Public Health Social Sciences

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A Study of Compost as an Adsorbent for Congo Red Dye Removal Process Gabriel Andari Kristanto; Ariessyawtra Raindra Lamurvie; William Koven
Reaktor Volume 17 No. 4 Desember 2017
Publisher : Dept. of Chemical Engineering, Diponegoro University

The human population continues to grow annually, and so does the number of textile industries. In textile industry, synthetic dye is one of the most polluting substance in its wastewate which the conventional treatment processes are usually ineffective. Another option is using activated carbon to remove the dye, but carbon is an expensive material. It is is interesting that material that is rich in carbon, such as compost, may become an alternative solution. The objective of the present study was to assess the capability of compost in treating wastewater dye by determining the optimum compost dosage, particle size, and column height, while considering dye percentage removal and adsoprtion capacity. The optimum compost dosage was 8g/L and the optimum particle size was 1–2 mm in treating the 200 ppm Congo Red dye molecule, resulting in 20.49% removal and a 5.33 mg/g adsorption capacity. The optimum compost column height was 60 cm with 90% removal, and the adsorption capacity was 0.38 mg/g. The dye molecule wore off tthe compost, therefore fresh compost must be introduced in order to maintain its percentage removal level. The compatibility of isotherm model developed in this study with the Freundlich model is similar with previous studies. Keywords: compost; congo red dye;adsorbent, batch, column

ANALISA PEMANFAATAN KOMPOS SEBAGAI MEDIA BIOCOVER DI TEMPAT PEMROSESAN AKHIR SAMPAH: Studi Kasus Kota Depok, Jawa Barat Gabriel Andari Kristanto; Dwi Rahayu; Evy Novita
Reaktor Volume 15, No.2, OKTOBER 2014
Publisher : Dept. of Chemical Engineering, Diponegoro University

High percentage of organic waste in urban areas makes composting as good alternative in waste processing. However, composting has not been effectively used and the result is not optimal. Previous studies found compost can be used as biocover media to reduce methane emission landfill. The objective of the study is to identify the characteristic of produced at temporary waste unit Depok, West Java and the effect of compaction toward the amount of methane removal in the landfill. Before applied as biocover media, compost was characterized followed by maturation process. Study on methane removal efficiency was conducted as batches in four reactors for 35 days with compaction rate varying from 750, 800, 850 dan 900 kg/m3. Composting media used in the research had 80 cm thickness with artificial gas consisting of 50% CH4 dan 50% CO2. Initially, compost did not meet criteria as mature compost based on SNI 19-7030-2004, and as media biocover hence a pre-treatment was needed to improve the quality compost to meet the requirements. Compaction rate of 900 kg/m3has highest elimination capacity of methane i.e. 98,31%±3,6% and 13,98±4,32 g/m3/hour.

Assessment of Compost Maturity using The Static Respirometry Index Gabriel Andari Kristanto; Syifa Aulia Rahmah
Reaktor Volume 18 No. 4 December 2018
Publisher : Dept. of Chemical Engineering, Diponegoro University

To be used as organic fertilizer, compost must be stable and mature enough to ensure that it is safe for agricultural application. The stability and maturity of compost can be viewed from physical, chemical, and biological parameters. One of the biological parameters is the static respiration index (SRI). In many places, the SRI is applied as a representative indicator of the stability and maturity of compost but not in Indonesia compost standard of the SNI 19-7030-2004. This study aims to assess the index of the static respiration of composts and analyze their stability and maturity. The assessment was carried out on 10 compost samples sold in Jakarta and Depok. It is observed that 8 of 10 tested composts was stable and mature, with a static respiration index of 0.61–1.35 mg O2 g-1 VS h-1. One of the 10 composts was very stable and very mature, with a static respiration index of 0.46 mg O2 g-1 VS h-1 and 1 compost was unstable and immature, with an index of 1.79 mg O2 g-1 VS h-1. The results indicated that re-composted for seven days was adequate to make the compost more stable and mature than the initial state. Since maturity is not described by a single property, it is great assurance for the compost producer and end user in Indonesia that not only physical and chemical characteristics are used as indicator for compost stability and maturity but also biological indicator such as SRI. Keywords: compost; maturity; stability; static respiration index

Co-Authors Ariessyawtra Raindra Lamurvie Aristiati Ratna Aristiati Ratna Banaget, Cut Keumala Dahlan, Astryd Viandila Danumihardja, Irma Gusniani Della, Sevia Djoko M Hartono Dwi Rahayu Evy Novita Hilal, Zia Ru`ya Irma Gusniani Jachrizal Sumabrata Siti Kurnia Astuti Siti Kurnia Astuti, Siti Kurnia Sukma, Bayu Syaiful Amin Syifa Aulia Rahmah William Koven

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