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All Journal Journal of Research and Technology Jurnal Pensil : Pendidikan Teknik Sipil Serambi Engineering
Mirna Apriani
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Other

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TIME RISK ANALYSIS OF IMPLEMENTATION SELF-MANAGED COMMUNITY PROJECT IN BANGIL – KALIANYAR VILLAGE Luqman Cahyono; Mirna Apriani; Anggara Trisna Nugraha; Agung Prasetyo Utomo
Jurnal Pensil : Pendidikan Teknik Sipil Vol 11 No 2 (2022): Jurnal Pensil : Pendidikan Teknik Sipil
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (327.633 KB) | DOI: 10.21009/jpensil.v11i2.25078

Abstract

Self-managed project through of KOTAKU (Kota Tanpa Kumuh) program managed by Lembaga Keswadayaan Masyarakat Abdi Karya Amanah Kalianyar - Bangil Village received around 1 billion funds from Direktorat Jenderal Cipta Karya Kementrian Pekerjaan Umum Dan Perumahan Rakyat. The implementation of self-managed projects is carried out entirely by the community with less knowledge regarding building construction. The research objective is to identify and analyze time risks in implementing community self-managed projects. The data analysis method used is literature study, observation, average analysis, risk analysis and risk matrix preparation. The results of the analysis show that there are 20 risk variables with the highest ranking being low labor productivity where the measurement scale is likely to occur >60–80% and the risk impact on time is >7-30 days from the duration of the project, then the risk response decision "Avoidance" risk must be avoided.
PEMANFAATAN LIMBAH DAUN NANAS (ANANAS COSMOSUS) SEBAGAI ADSORBEN LOGAM BERAT Cu Mayangsari, Novi Eka; Mirna Apriani; Veptiyan, Egata Dwi
Journal of Research and Technology Vol. 5 No. 2 (2019): JRT Volume 5 No 2 Des 2019
Publisher : 2477 - 6165

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55732/jrt.v5i2.322

Abstract

Pineapple leaf waste (Ananas cosmosus) contains a constituent component in the form of cellulose and lignin. Cellulose, hemicellulose, and lignin bind to each other to form lignocellulose. The high cellulose content can be used as an adsorbent through the process of delignification or removal of lignin. This study aims to determine the characteristics and ability of pineapple leaf cellulose to remover heavy Cu metals. Applied pineapple leaves to be used are equalized to 60 mesh then delignified for 70 and 90 minutes by mixing pineapple powder using 9% NaOH with a ratio of 1:30 (w/v). Pineapple leaves are characterized by chesson, SEM, and XRD analysis. The results of Chesson analysis showed that pineapple leaf cellulose had a cellulose content of 25.33% and the delignification time of 70 minutes resulted in the highest cellulose content of 59.12%. The XRD diffractogram showed pineapple leaf cellulose including type I cellulose. The highest degree of crystallinity was obtained by pineapple leaf cellulose with a delignification time of 90 minutes which was equal to 65.98%. The adsorption process was observed with variations in contact time 30, 60, 90, and 120 minutes. The highest Cu metal adsorption was pineapple leaves with a delignification process of 70 minutes with a contact time of 90 minutes.
Pengolahan Limbah Industri Kerupuk Ketumbar Menggunakan Biofilter Aerobik Dewi, Tanti Utami; Ulvi Pri Astuti; Ahmad Erlan Afiuddin; Mirna Apriani; Danang Hadi; Ferisa Jenisa
Jurnal Serambi Engineering Vol. 10 No. 3 (2025): Juli 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

The coriander cracker industries in Nganjuk City, commonly structured in Small Business scales are  still implying conventional equipment in its production. High daily production volumes are resulting the large amounts of liquid waste containing pollutants exceeding Indonesia’s Threshold Value specifically in Chemical Oxygen Demand (COD) at 131.2 mg/L and Total Suspended Solids (TSS) at 203 mg/L. This condition causes serious environmental risks toward improper treatment. The biofilter system is one of wastewater treatment method with a simple and applicable way, applying a biological treatment approach utilizing microorganisms to reduce organic contaminants. This study aims to analyze the influence of media type on the removal efficiency of COD and TSS concentrations in coriander cracker industries’ wastewater using an aerobic biofilter system with the bioball and Kaldness K1 media. Performance testing of the aerobic biofilter demonstrated that the reactor with Kaldness K1 media achieved the highest removal efficiencies, eliminating 85.96% of COD and 95.01% of TSS by day 12. The study confirms that the Kaldnes K1 media's porous surface structure and high specific surface area enhance biofilm growth of microorganisms, thereby optimizing organic matter degradation processes.
PEMANFAATAN LIMBAH DAUN NANAS (ANANAS COSMOSUS) SEBAGAI ADSORBEN LOGAM BERAT Cu Mayangsari, Novi Eka; Mirna Apriani; Veptiyan, Egata Dwi
Journal of Research and Technology Vol. 5 No. 2 (2019): JRT Volume 5 No 2 Des 2019
Publisher : 2477 - 6165

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55732/jrt.v5i2.322

Abstract

Pineapple leaf waste (Ananas cosmosus) contains a constituent component in the form of cellulose and lignin. Cellulose, hemicellulose, and lignin bind to each other to form lignocellulose. The high cellulose content can be used as an adsorbent through the process of delignification or removal of lignin. This study aims to determine the characteristics and ability of pineapple leaf cellulose to remover heavy Cu metals. Applied pineapple leaves to be used are equalized to 60 mesh then delignified for 70 and 90 minutes by mixing pineapple powder using 9% NaOH with a ratio of 1:30 (w/v). Pineapple leaves are characterized by chesson, SEM, and XRD analysis. The results of Chesson analysis showed that pineapple leaf cellulose had a cellulose content of 25.33% and the delignification time of 70 minutes resulted in the highest cellulose content of 59.12%. The XRD diffractogram showed pineapple leaf cellulose including type I cellulose. The highest degree of crystallinity was obtained by pineapple leaf cellulose with a delignification time of 90 minutes which was equal to 65.98%. The adsorption process was observed with variations in contact time 30, 60, 90, and 120 minutes. The highest Cu metal adsorption was pineapple leaves with a delignification process of 70 minutes with a contact time of 90 minutes.
Co-Authors Ahmad Erlan Afiuddin Anggara Trisna Nugraha Danang Hadi Ferisa Jenisa Luqman Cahyono Novi Eka Mayangsari Tanti Utami Dewi Ulvi Pri Astuti Utomo, Agung Prasetyo Veptiyan, Egata Dwi