Article Per Year (5 Year)
p-Index From 2020 - 2025
1.151
P-Index
This Author published in this journals
All Journal Jurnal Ilmu Lingkungan Jurnal Reka Lingkungan Jurnal Sains Teknologi dan Lingkungan (JSTL) Al-Ard: Jurnal Teknik Lingkungan JURNAL REKAYASA KIMIA & LINGKUNGAN
Dewi Fitria
Universitas Riau, Pekanbaru, Indonesia
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Energy Engineering Environmental Science Public Health

Published : 5 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 5 Documents
Search

 1 
Pengaruh Rasio Padat/Cair dan Waktu Pengadukan pada Proses Ekstraksi Silika dari Palm Oil Fly Ash (POFA) Fika Rahma Yuni; Lita Darmayanti; Dewi Fitria
Al-Ard: Jurnal Teknik Lingkungan Vol. 6 No. 2 (2021): Maret
Publisher : Department of Environmental engineering, Faculty of Science and Technology, Islamic State University Sunan Ampel Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29080/alard.v6i2.1065

Abstract

Palm oil fly ash (POFA) is one of the solid wastes produced from burning palm kernel shells and coir as a steam generator for palm oil mills. POFA has a high silica content and might potentially to be used as an adsorbent. The removal of impurity metals and the separation of SiO2 by extraction process is a way to improve the performance of silica. The extraction process is influenced by several factors including the solid/liquid ratio and the stirring time. This study used a solid/liquid ratio of 1: 8, 1:10, 1:12 and a stirring time of 120; 150; 180; and 210 minutes. The results showed the highest mass of silica deposits was at a ratio of 1:12 and stirring time of 210 minutes with a mass of 18.35 grams or 73.4% of 25 grams of POFA with a silica content of 47.97% and a silica surface area 8.18 m2/g. Silica from each variation was tested on peat water. The highest removal efficiency of color, organic matter, and Fe were 80%, 46%, and 37% respectively by the extracted silica with a solid/liquid ratio 1:12 and stirring time 210 minutes.
PENGARUH WAKTU FLOKULASI PADA PROSES KOAGULASI FLOKULASI DENGAN BIOKOAGULAN KELOR UNTUK MENYISIHKAN KADAR BESI AIR SUMUR Dewi Fitria; Puti Sri Komala; Dura Vendela
Jurnal Reka Lingkungan Vol 10, No 2 (2022)
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekalingkungan.v10i2.165-174

Abstract

Salah satu sumber air baku air minum yang sering digunakan adalah air sumur. Air sumur pada umumnya mempunyai kualitas yang lebih baik dibanding air permukaan. Masalah yang sering ditemui pada air sumur adalah airnya terkadang mengandung logam besi (Fe) yang tinggi. Fe yang tinggi dapat menimbulkan gangguan kesehatan, menimbulkan bau yang menyengat dan gangguan estetika akibat perubahan warna air. Dalam penelitian ini digunakan proses koagulasi flokulasi untuk menurunkan kandungan Fe di dalam air sumur dengan menggunakan biji kelor sebagai biokoagulan. Percobaan ini menggunakan variabel utama waktu flokulasi dengan rentang 10-30 menit dengan interval 2 menit. Pengaruh waktu flokulasi pada penyisihan Fe juga dikaji pada variabel yang ikut mempengaruhi penyisihan Fe seperti  ukuran flok, C-organik air hasil koagulasi dan kadar air dalam flok. Waktu koagulasi yang digunakan adalah selama 1 menit dengan kecepatan 100 rpm, kecepatan flokulasi 40 rpm, waktu pengendapan 60 menit, dan dosis kelor yang digunakan 33 mg/L. Hasil penelitian menunjukkan bahwa waktu flokulasi optimum penyisihan Fe adalah 18 menit.
Pengembangan Rotary Algae Biofilm Reactor (RABR) Sistem Semikontinu untuk Produksi Biomassa dan Kadar Lipid, serta Penyisihan Polutan Organik Konsentrasi Tinggi Shinta Elystia; David Andrio; Dewi Fitria; Aryo Sasmita; Rahmadini Setianingsih
Jurnal Ilmu Lingkungan Vol 22, No 3 (2024): May 2024
Publisher : School of Postgraduate Studies, Diponegoro Univer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jil.22.3.693-703

Abstract

Penggunaan energi sebagian besar masih berasal dari sumber energi tidak terbarukan yang jumlahnya semakin berkurang. Produksi biofuel dari mikroalga dapat menjadi salah satu energi alternatif dalam menghasilkan energi terbarukan. Kadar lipid dalam biomassa mikroalga dapat dikonversi menjadi bahan baku biodiesel. Teknologi Rotary Alga Biofilm Reaktor (RABR) salah satu teknologi kultivasi mikroalga dan pengolahan limbah. RABR adalah pengembangan dari Rotating Biological Contactor, RABR adalah sistem pengolahan biologi dengan sistem attached growth dan suspended growth. Limbah cair tahu mengandung senyawa organic konsentrasi tinggi yang dapat dimanfaatkan oleh mikroalga sebagai nutrisi pertumbuhan untuk memproduksi biomassa dan menghasilkan lipid. Pada penelitian ini dilakukan pengolahan limbah cair tahu oleh mikroalga Chlorella sp. menggunakan teknologi Rotary Algae Biofilm Reactor (RABR) dengan metode penambahan nutrien secara semikontinu melalui variasi periode pergantian air limbah setiap 3 hari, setiap 4 hari dan setiap 6 hari selama total 12 hari pengolahan, hal ini bertujuan untuk mengetahui jumlah produksi biomassa dan kadar lipid dalam sel mikroalga Chlorella sp. tersuspensi dan biofilm serta penyisihan COD limbah cair tahu. Hasil terbaik didapatkan pada variasi periode pergantian air limbah setiap 4 hari karena nutrisi yang dibutuhkan oleh mikroalga terpenuhi dengan baik, selain itu juga diperoleh jumlah maksimum kepadatan sel tersuspensi dan biofilm di hari ke-12 yaitu 5,2x106 sel/ml dan 4,1x106 sel/ml, kadar lipid selama pengolahan sebesar 25-52% dan efisiensi penyisihan COD limbah cair tahu mencapai 90,24% dengan konsentrasi akhir COD adalah 64 mg/L.
Aplikasi Beads Komposit Chitosan – Clay Sebagai Adsorben dalam Penyerapan Ion Klorida (Cl-) Pada Air Payau: Application of Chitosan – Clay Composite Beads as Adsorbent to Removal of Cl- Ions in Brackish Syavina Ananda; Shinta Elystia; Dewi Fitria
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 9 No. 3 (2023): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v9i3.362

Abstract

Water resources found in coastal areas and islands in terms of water quality are still relatively low, so treatment is necessary. Chitosan and clay are adsorbents that can be applied in various techniques to overcome environmental pollution. Chitosan is a natural adsorbent that has a high adsorption capacity but has low mechanical stability and is easily dissolved in an acidic medium. Clay is an adsorbent with a large specific surface area and has high mechanical stability. This research uses chitosan – clay beads, which aim to increase mechanical stability environmental resistance, and efficiency in brackish water treatment. It is located in Bandar Sungai Village, Sabak Auh District, Siak Regency. The research was conducted by varying the concentration of chitosan–clay beads (1:0), (1:0,25), (1:0,5), and (1:0,75) (w/w) to decrease the chloride ion (Cl-) in brackish water. The characterization of chitosan-clay beads with the water absorption test obtained the best results at the concentration variation (1:0), which was equal to 694,079%. The mechanical strength test obtained the best results at the concentration variation (1:0,75), which was 6,23 kgf. The characterization of chitosan-clay beads using SEM showed that the beads had larger pores. The results obtained show the best chloride ion removal efficiency (Cl-) of 90,828% with a final concentration of 113 mg/L at a concentration of chitosan – clay beads of (1:0.5) with a sampling time of 30 minutes. The research results have met the quality standards set by the Government Regulation of the Republic of Indonesia Number 22 of 2021 concerning the Implementation of Environmental Protection and Management.
Assessment of Sail River Water Quality in Pekanbaru City Using the STORET and Pollution Index (IP) Methods Fitria, Dewi; Suci, Nabila Rahma; Darmayanti, Lita
Jurnal Rekayasa Kimia & Lingkungan Vol 20, No 1 (2025): Jurnal Rekayasa Kimia & Lingkungan (June, 2025)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v20i1.40087

Abstract

The Sail River acts as the main drainage in Pekanbaru City. Several community activities around the Sail River, such as residential areas, plantations, livestock, shops, markets, and schools, cause decreasing in water quality in the Sail River. For this reason, it is necessary to analyze the water quality of the Sail River using the STORET method and the Pollution Index. The physical (temperature, TSS, TDS), chemical (pH, COD, DO, Pb), and biological (total coliform) parameters were analyzed. The results of the water quality analysis obtained were compared with Class II Water Quality Standards based on PP No. 22 of 2021. The results of the analysis of the quality status of the Sail River downstream based on the STORET method over the last five years show a "heavily polluted" condition, while the results of the IP method analysis show a "moderately polluted" condition. Based on the STORET and Pollution Index methods results, sail river needs a pollution control policy and management to overcome the pollution.
Co-Authors Aryo Sasmita David Andrio Dura Vendela Fika Rahma Yuni Lita Darmayanti Puti Sri Komala Rahmadini Setianingsih Shinta Elystia Suci, Nabila Rahma Syavina Ananda