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All Journal Sainteknol : Jurnal Sains dan Teknologi Journal of Clean Technology
Fauziyyah, Hasna Amalia
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Computer Science & IT Engineering

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Utilization of Nutgrass (Cyperus Rotundus L.) as a Phytoremediator in Reducing BOD and COD Levels of Batik Liquid Waste Using Constructed Wetlands in Sub-Surface Flow Type Irsyada, Muhamad Zakky; Fauziyyah, Hasna Amalia; Sari, Ayuk Permata
Sainteknol : Jurnal Sains dan Teknologi Vol 21, No 2 (2023): December 2023
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/sainteknol.v21i2.49818

Abstract

The process of dyeing batik fabric is a significant source of water pollution due to synthetic dyes. Only 5% of this compound is used, while 95% will be disposed of as waste. This compound is relatively stable, so it is tough to degrade in nature and is dangerous for the environment because it can cause effects such as increasing COD (Chemical Oxygen Demand) and BOD (Biological Oxygen Demand). Constructed wetlands in sub-surface flow type is a wastewater treatment method that utilizes the role of plants and microorganisms found in the plant root area or rhizosphere. Nutgrass (Cyperus Rotundus L.) is rarely used and is considered a weed that causes harm to surrounding plants. On the other hand, nutgrass is a plant with good remediation and straightforward maintenance. In this research, the nutgrass plant was used as a phytoremediator with planting media in the form of sand and gravel to improve the performance of constructed wetlands in processing liquid batik waste. Based on the analysis of BOD and COD test parameters, the results showed that nutgrass could reduce BOD levels by up to 75% and COD levels by 73% so that wastewater produced from artificial wetlands flows more safely and can be used for irrigation and plants sanitation.
Sustainable Production of Biofuels from Microalgae (Chlorella vulgaris) Using Irradiation Microwave as Future Green Energy; a Review Krisdayanti, Shendy; Fauziyyah, Hasna Amalia; Ubay, Isnina Noor; Erliana, Savira Rinda
Journal of Clean Technology Vol. 1 No. 1 (2024): February 2024
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/joct.v1i1.1663

Abstract

Biodiesel is a solution to the problem of depleting fossil fuel sources in Indonesia. Biodiesel can be derived from vegetable and animal fats. On the other hand, microalgae cultivation areas are spread across 26 provinces in Indonesia with a production potential of 462,400 tonnes/year. Microalgae with lipid content ranging from 38% - 60% can be converted into crude biodiesel as much as 35%. Irradiation microwave is the simplest and most effective technology with a constructive method for extracting oil from animal and vegetable fats, and biomass, and can be scaled easily. Using irradiation microwave, oil will be extracted from microalgae using hexane: methanol solvent for 60 minutes with a microwave power of 600 watts. Microalgae extraction with the help of irradiation microwave can produce more lipids compared to conventional lipid extraction which is 31% and 26% higher. Microalgae that go through a treatment process using irradiation microwave is more efficient because the average cost is two-thirds less compared to conventional heating, its lower energy consumption, lower costs, a more effective heating process, can increase production, and have a big impact on increasing biofuel yields.
Co-Authors Erliana, Savira Rinda Irsyada, Muhamad Zakky Krisdayanti, Shendy Sari, Ayuk Permata Ubay, Isnina Noor