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Pengolahan Lindi TPA Muara Fajar Pekanbaru Menggunakan Sequencing Batch Reactor Aerob dengan Variasi Teknik Stabilisasi (IDLE) Ashari Syawal, Ferdy; Dinil Fitri, Shafira; Darmayanti, Lita; Andrio, David; Tanjung, Munir; Fadhila, Fadhila
Jurnal Teknik Kimia USU Vol. 15 No. 1 (2026): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v15i1.23407

Abstract

Leachate is a liquid generated from waste decomposition containing organic matter, ammonia, heavy metals, and suspended solids in high concentrations. Improper leachate disposal can pollute soil and water around the landfill. This study aims to determine the effect of different idle stabilization techniques on COD, ammonia, and TSS removal efficiency using an aerobic Sequencing Batch Reactor (SBR). Three idle variations were tested: static idle, mixed idle, and aerated idle. The SBR reactor was operated with fill (1 h), react (18 h), settle (2 h), draw (1 h), and idle (2 h) phases for four cycles. The results showed that the aerated idle variation achieved the highest removal efficiencies: COD 86.67%, ammonia 95.36%, and TSS 93.97%. Aerated idle provided better sludge stability and optimal oxygen conditions for microbial activity.
The Impact of Market Relocation on the Income of Traders in Sorong City Fadhila, Fadhila; Hasbiah, Hasbiah; Rahman, Abdul
EKOMA : Jurnal Ekonomi, Manajemen, Akuntansi Vol. 5 No. 3: Maret 2026
Publisher : CV. Ulil Albab Corp

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56799/ekoma.v5i3.16542

Abstract

This study aims to analyze the impact of market relocation on traders’ income at Rufei Modern Market, Sorong City. The research employs a quantitative approach using primary data collected from 50 traders who experienced the relocation process. Data were analyzed through descriptive statistics, validity and reliability tests, normality testing, paired sample t-test, and simple linear regression. The results show that market relocation improved the physical quality of the trading environment, including facilities, comfort, security, and spatial organization. However, these improvements were not followed by better economic outcomes. The average daily income of traders decreased from IDR 475,000 before relocation to IDR 398,000 after relocation, indicating a decline of 16.2%. The paired sample t-test confirms that this decrease is statistically significant. Regression analysis reveals that positive perceptions of the new market conditions are associated with better income changes, although the influence remains limited. Furthermore, the impact of relocation varies among traders depending on merchandise type, customer dependency, and adaptability. Overall, market relocation has both structural benefits and economic challenges, indicating the need for supporting policies to ensure traders’ sustainability.