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Indah Lestari, Dwi
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Religion Chemistry Computer Science & IT Economics, Econometrics & Finance Education Energy

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Adsorption of Tofu Liquid Waste Using Rice Husk Activated Carbon Daning Kinanti Sutama; Alfiana, Aulia Firda; Rizkita, Nadya; Indah Lestari, Dwi; Aminah, Siti
Science Education and Application Journal Vol 7 No 1 (2025): Science Education and Application Journal
Publisher : Program Studi Pendidikan IPA, Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/seaj.v7i1.1170

Abstract

Adsorption of Tofu Liquid Waste Using Rice Husk Activated Carbon. Rice husk is an agricultural by-product rich in organic matter, and improper management can cause environmental pollution. Given the high carbon content in rice husk, it can be used as an adsorbent. Furthermore, the type of activator and activation technique employed impact the properties of activated carbon. Due to its ability to produce activated carbon with a high pore volume and specific surface area, KOH is a chemical substance that is frequently employed. This study sought to ascertain whether rice husks might be used as activated carbon to lower the amount of organic matter in liquid effluent from the tofu business. The results of this study indicate that rice husk activated carbon can reduce the level of TDS by 27%, TSS by 97%, and pH 6 from the initial level. The optimum contact time is 120 minutes at a ratio variation of 1:130, because at that time the activated carbon has approached saturation by the adsorbed adsorbate and experienced equilibrium and saturation.
Comparative Efficiency of KOH-Activated Rice Husk Carbon in Adsorbing Pollutants from Laundry and Tofu Wastewater Daning Kinanti Sutama; Indah Lestari, Dwi; Endah Kusuma Wardani, Erina; Fauziah, Shaddiqah Munawaroh; Alfiana, Aulia Firda
Science Education and Application Journal Vol 7 No 2 (2025): Science Education and Application Journal
Publisher : Program Studi Pendidikan IPA, Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/seaj.v7i2.1254

Abstract

Comparative Efficiency of KOH-Activated Rice Husk Carbon in Adsorbing Pollutants from Laundry and Tofu Wastewater. This study aims to compare the adsorption capacity of rice husk-based activated carbon in overcoming pollution from two types of liquid waste, namely laundry waste and tofu liquid waste. The raw material of rice husk is processed through a carbonization process and chemical activation using potassium hydroxide (KOH), then used in a batch adsorption test. The parameters analyzed include Chemical Oxygen Demand (COD), Total Dissolved Solids (TDS), and Total Suspended Solids (TSS). The results show that the adsorbent material produced is able to reduce pollutant levels significantly. COD and TDS are more effectively reduced in laundry waste because the organic content and surfactants are more easily adsorbed, while TSS experiences a greater decrease in tofu waste due to the high suspended solids content. The adsorption process follows the Langmuir isotherm model with the regression values for both laundry and tofu wastewater of  R2>0.9, which indicates the occurrence of monolayer adsorption on the surface. This biosorbent has proven to be economical, environmentally friendly, and has the potential to be applied on a small scale, especially for household industries such as laundry businesses and tofu production. In addition to being relevant for local contexts, this approach can also be adopted globally in areas with high rice husk availability and similar waste management problems.
Analisis Pemasaran Produk Simpanan Dan Pembiayaan Pada BMT Insan Madani Satriana, Desmi; Hartini, Dwi; Indah Lestari, Dwi; Mai Fransiska, Helga; Imanda, Rafly
Risalah Iqtishadiyah Vol 3 No 2 (2024): July - December 2024
Publisher : Risalah Iqtisadiyah: Journal of Sharia Economics, Sharia Economics Study Program, STEI Ar Risalah Sumatera Barat

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Abstract

In BMT Insan Madani there are business fields, one of which consists of collecting funds and distributing funds, namely Savings and Financing. These savings products consist of savings products, such as (wadiah savings, education savings, hajj/umrah savings, holiday savings, and qurban savings), and then financing products, such as (murabahah, mudharabah, musyarakah, and IMBT). The purpose of this study is to determine the implementation of marketing savings and financing products. This study uses a qualitative method, namely by collecting data by conducting interviews. The results of this study are that BMT is present as a place to collect funds for people who need a place to store funds in the future, both for education, hajj/umrah, and even holidays. In addition, BMT is also a place to provide funds and acts as a capital manager for people who lack funds in building their businesses. The initial procedure carried out by BMT Insan Madani in marketing its products, they conduct a location survey, this is done to find information about the needs and problems that exist in the community, after the location survey is carried out, the BMT will collect funds or distribute funds with savings products and provisions available at BMT Insan Madani, according to the needs of the community.
Co-Authors Alfiana, Aulia Firda Daning Kinanti Sutama Dwi Hartini Endah Kusuma Wardani, Erina Imanda, Rafly Mai Fransiska, Helga Rizkita, Nadya Satriana, Desmi Shaddiqah Munawaroh Fauziah Siti Aminah