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All Journal Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Jurnal Katalisator

Suci Wulandari

Universitas Andalas

Author-ID : 5411720

Agriculture, Biological Sciences & Forestry Chemistry Earth & Planetary Sciences

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Home Biogas Production using Homemade Bio-activator with Chicken Manure Heru Surianto; Slamet Raharjo; Suci Wulandari
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 18, No 2 (2021): July 2021
Publisher : Universitas Diponegoro

The previous experiment was obtained that homemade activator is the best activator to produce biogas by using food waste consist of vegetable, fruit and rice waste. The current research is carried out by adding chicken manure as a co-activator. Chicken manure content rich in nitrogen can be significantly enhance biogas production. This study is expected to increase the biogas production. There are two processes conducted at the laboratory scale, batch and semi-continuous process. The batch process aim to activate bacteria. The ratio set at food waste/chicken manure, 2 : 1 of digester #1, 3 : 1 of digester #2, 4 : 1 of digester #3 and digester control using food waste only. Stage two aims to produce biogas by adding food waste for 6 days periodically. The ratio is set at food waste/water, 1 : 2. The highest biogas yielded is digester 2 with a cumulative volume biogas 120.77 liters consist of 71.01% CH4, 26% CO2, 2.9% O2 and 0.088% H2S. The potential of methane gas produced is 0.87 kWh and methane volume per TS and VS at around 18.72 L/kg and 34.68 L/kg, respectively.

GWP, AP, and EP Contribution on Potential Improving Scenarios of Domestic SWM in Padang City: A Review Suci Wulandari; Slamet Raharjo
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 18, No 1 (2021): March 2021
Publisher : Universitas Diponegoro

The increase in solid waste generation is incompatible with solid waste management (SWM). Padang city have a small processing percentage of 5% through composting and recyling. Improper and nonoptimal SWM lead to many obstacles including climate change, water and soil contamination, to creatures life disturbance. By conducting Impact Assessment and Contribution Analysis, this study examines the most impact contributor of unit processes in four scenarios of domestic solid waste management in Padang City. Scenario 0 presents the existing condition; scenarios 1, 2, and 3 present the improvement of Scenario 0 in recycling percentage rate and technology implementation in a row by composting, incineration, and anaerobic digestion. CML2001, impact assessment method by Center of Environmental Sciences of Leiden University, is used to assess the environmental impact of Global Warming Potential (GWP), Acidification Potential (AP), and Eutrophication Potential (EP). This study found that the significant impact for the four scenarios is GWP by the contribution percentage over 72%. While EP is the second place in the contribution range of 1.70% to 5.46%, and followed by AP under 0.91%. Scenario 1 is the best scenario due to the small contribution of impact compared to other scernarios, and potentially to be applied by modification in increase of composting percentage and additional recovery gas in landfill.

ISOTHERM, KINETICS, AND THERMODYNAMIC STUDIES FOR ADSORPTION METHYLENE BLUE SOLUTION USING SHRIMP SHELL Suci Wulandari; Hamdhan Fathony; Putri Ramadhani; Deswati; Rahmiana Zein
JURNAL KATALISATOR Vol. 8 No. 1 (2023): Jurnal Katalisator Volume 8 No. 1, April 2023
Publisher : LLDIKTI X Sumbar, Riau, Jambi, Kepri

This research was carried out adsorption of methylene blue dye using shrimp shell (SS) biosorbent. Methylene blue dye is commonly used in the textile and paper industries. Previously, research had been carried out on the adsorption of anionic dyes by shrimp shells, then in this study a batch adsorption was carried out to absorb methylene blue cationic dyes.It is carried out in batches with several parameters to obtain the optimum conditions. Several studies were carried out such as isotherm studies, kinetics and thermodynamics to analyze how the adsorption process occurs. The adsorption process followed the Langmuir isotherm model for the two biosorbents which showed the formation of monolayers, the kinetic model followed the second-order pseudo. The thermodynamic study of shrimp shells showed that the adsorption process was non-spontaneous, endothermic, and increased randomness. FTIR analysis shows that there are electrostatic interactions, cation exchange, and hydrogen bonding. SEM-EDX analysis shows that the pore filling of the biosorbent surface by methylene blue molecules occurs.

THERMODYNAMIC STUDY OF METHYLENE BLUE DYE ADSORPTION USING KAPOK HUSK Hamdhan Fathony; Suci Wulandari; Putri Ramadhani; Rahmiana Zein; Deswati
JURNAL KATALISATOR Vol. 8 No. 1 (2023): Jurnal Katalisator Volume 8 No. 1, April 2023
Publisher : LLDIKTI X Sumbar, Riau, Jambi, Kepri

This research discusses the thermodynamics of methylene blue(MB) adsorption using kapok husk (KH) and kapok huskmodified with citric acid (CA-KH). Both biosorbents obtained thermodynamic results with a negative value of the change in Gibbs energy (∆G), indicating that the adsorption process took place spontaneously, a negative value on enthalpy (∆H), indicating the adsorption process was an exothermic process, and a negative entropy value (∆S) indicating an increase The regular distribution of methylene blue dye on the surface during the adsorption process is proven by the results of SEM photo analysis at 3000x magnification with the distribution of methylene blue dye on the surface of the two biosorbents..

Co-Authors Deswati Deswati Hamdhan Fathony Heru Surianto Putri Ramadhani Rahmiana Zein Slamet Raharjo

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