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All Journal PENELITIAN DAN KARYA ILMIAH Journal of Environmental Engineering & Waste Management Jurnal Serambi Engineering ACADEMICS IN ACTION Journal of Community Empowerment JURNAL PENELITIAN DAN KARYA ILMIAH LEMBAGA PENELITIAN UNIVERSITAS TRISAKTI Jurnal Penelitian dan Karya Ilmiah Lembaga Penelitian Universitas Trisakti INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY
Rijal Hakiki
President University
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Reduksi Tingkat Kekeruhan dan Total Partikel Tersuspensi Melalui Proses Sentrifugasi Pada Air Limbah Wudu Rijal Hakiki; Dwi Anggi Agustin
Journal of Environmental Engineering and Waste Management Vol 8, No 1 (2023)
Publisher : President University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33021/jenv.v8i1.3886

Abstract

Abstrak. Air limbah dihasilkan dari aktivitas manusia, baik industri maupun domestik. Air limbah domestik berasal dari kegiatan rumah tangga seperti mandi, mencuci, jamban, dan wudhu. Indonesia sebagai negara dengan mayoritas penduduk muslim menghasilkan air limbah wudhu yang dihasilkan setidaknya dari lima kali ibadah solat wajib. Secara umum, air limbah dapat diolah dengan berbagai teknologi, salah satunya adalah teknologi sentrifugasi. Teknologi sentrifugasi adalah salah satu teknologi proses untuk memisahkan partikel tersuspensi dari air limbah. Tujuan: Penelitian ini berfokus pada penggunaan teknologi sentrifugasi untuk mengolah air limbah wudhu yang bertujuan untuk mengetahui kemampuan teknologi sentrifugasi dalam pengolahan air limbah wudhu dalam hal efisiensi penyisihan dan penetuan kondisi proses optimum sehingga dapat menghasilkan efluen sesuai baku mutu air permukaan. Parameter indikator yang diamati sebagai acuan untuk mengamati perubahan kondisi efluen hasil pengolahan adalah tingkat kekeruhan (turbidity) dan konsentrasi total padatan terlarut (TSS). Metode dan Hasil: Penelitian ini merupakan penelitian skala laboratorium yang menggunakan unit sentrifugasi sebagai instrumentasi utama. Air limbah wudhu akan diolah pada berbagai variasi kombinasi perlakuan antara lain variasi kecepatan rotasi 500, 1500, 3000, 4500, dan 6000 rpm dan variasi durasi sentrifugasi 1, 3, 5, 8, dan 10 menit dengan penambahan kaolin pada dosis 25, 50, dan 75%. Kesimpulan: Hasil pecobaan menunjukan bahwa rentang penyisihan kekeruhan berada pada nilai 16,1-99,4% dan 0,9-92% untuk penyisihan parameter TSS. Kondisi optimum proses penyisihan dapat dicapai pada kombinasi perlakuan durasi 1 menit, kecepatan sentrifugasi 6000 rpm dan dosis kaolin 75%.
INVENTARISASI FAKTOR KEBERLANJUTAN REDUKSI SAMPAH PLASTIK MELALUI PROSES PIROLISIS Hakiki, Rijal
JURNAL PENELITIAN DAN KARYA ILMIAH LEMBAGA PENELITIAN UNIVERSITAS TRISAKTI Volume 7, Nomor 1, Januari 2022
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/pdk.v7i1.10768

Abstract

Cemaran plastik sebagai mikroplastik di perairan menjadi masalah global. Plastik adalah salah satu produk turunan minyak bumi yang komponen penyusunannya berupa senyawaan karbon yang masih memiliki nilai kalor. Pirolisis merupakan salah satu metode pengolahan termal yang dapat meminimalisir emisi dari hasil pembakaran sejalan dengan reduksi timbulan sampah plastik di lingkungan. Telah banyak dikembangkan reaktor pirolisis komersial yang mayoritasnya masih dibuat dalam kapasitas besar dan menggunakan bahan bakar fosil sebagai sumber energi reaktornya. Hal tersebut menjadi pertanyaan besar sehubungan dengan fenomena “trade offs” jejak karbon dan isu netralitas karbon pada proses pirolisis berbasis bahan bakar fosil. Artikel ini mencoba membahas inventarisasi faktor-faktor keberlanjutan proses pirolisis plastik mengacu pada berbagai literatur terkini yang kajiannya dilakukan secara sistematis terhadap berbagai rekomendasi strategi khsusunya pada aspek teknis. Secara teknis proses pirolisis dapat mereduksi hingga sekitar 60% massa sampah plastik walaupun pada prosesnya dilepaskan sejumlah emisi karbon dari proses pembangkitan panas pada reaktornya. Hal ini dapat diatasi dengan mengkombinasikan penggunaan sumber energi terbarukan sebagai upaya pembangkitan panas yang diperlukan pada proses pirolisis. Optimasi rancangan reaktor pirolisis merupakan strategi lain yang dapat dilakukan sehubungan dengan isu keberlanjutan reduksi sampah plastik melalui proses pirolisis. Strategi lain sehubungan dengan peningkatan efisiensi reaktor pirolisis juga turut dibahas secara sistematis pada artikel ini
A Workshop on Writing a Systematic Literature Review Using Artificial Intelligence (AI)-Based Tools Emilius German; Rijal Hakiki; Ani Pujiastuti; Disa Evawani Lestari; Risa Fitria
ACADEMICS IN ACTION Journal of Community Empowerment Vol 6, No 1 (2024): In-Press
Publisher : President University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33021/aia.v6i1.5412

Abstract

To generate meaningful research, lecturers and investigators have to identify strong, innovative research ideas. However, they often have difficulty with digesting a large number of relevant studies when conducting literature review. The workshop on "Writing a Systematic Literature Review Using New Tools" was intended to provide academics and professors with cutting edge techniques and resources to improve the efficiency and quality of their literature reviews. Participants were provided with tools including Publish or Perish, Mendeley, and Rayyan to help with systematic review processes, reference management, and collecting bibliographic data. The workshop offered information and practical exercises so that attendees could use these tools directly. Participants' comments indicated notable progress in their capacity to organize data, carry out systematic evaluations, and efficiently pinpoint research gaps. Most attendees gave the course high marks for efficacy; most of them scored between 4 and 5. This favorable response highlights how well the workshop improved the participants' research abilities and tool competency, which raised the standard for academic research and publishing.
THE PROSPECT OF DIGITALLY ENHANCED COLORIMETRY AS AN ANALYTICAL METHOD FOR WATER QUALITY DETERMINATION Hakiki, Rijal; Wikaningrum, Temmy
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY Volume 2, Number 2, April 2019
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/urbanenvirotech.v2i2.4362

Abstract

Aim: This study aims to observe the potential implementation of analytical methods based on digital image processing as an alternative method of colorimetric analysis that can be implemented in site. Methodology and Results: Pt-Co standard series solutions at concentrations of 5, 10, 20, 30, 40, 50, 60, 70, 80, 90 and 100 concentration units (CU) were measured by spectrophotometric method and digitally enhanced colorimetric (DEC) method to obtain a response in the form of absorbance (Abs) and area under curve (AUC) value. Absorbance measurement was carried out at 317.5 nm (λ max). The AUC value was obtained from the 3-point RGB value measurements, made average so that a color band is produced, then quantified by translating the color band intensity into the response curve in ImageJ software. The Abs and AUC values of artificial samples are processed into CU values with linear equations resulting from linear regression test. The results of the calculation of CU values from the two measurement methods were tested using independent t test method to examine significant differences between the two measurement methods. Conclusion, significance and impact study: Coefficient of determination (R2) plot CU VS AUC = 0.8638, in independent t test was obtained p-value = 0.4246 at the 95% confidence level. Therefore, it can be concluded that digitally enhanced colorimetric could be used to determine water quality, especially color parameter in site measurement.
COMPARISON OF GLOBAL WARMING POTENTIAL-IMPACT ON THE HANDLING OF THE HAZARDOUS-SLUDGE FROM THE CENTRALIZED INDUSTRIAL-WASTEWATER TREATMENT PLANT Hakiki, Rijal; Astuti, Maryani Paramita; Wikaningrum, Temmy
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY Volume 3, Number 1, October 2019
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/urbanenvirotech.v3i1.5530

Abstract

Aim: This study aimed to compare the secured landfill method and thermally sludge treatment through gasification, in order to determine their environmental impacts. Methodology and Results: The gate-to-gate LCA method was the implementation approach used to determine the, limits and assumptions to the actual condition. The experimental, theoretical mass balance calculation and secondary data of previous researches were used to carry out this study, with open-source openLCA software. In addition, the LCA was made up of four phases which include goal and scope definition, inventory analysis, impact assessment, and data interpretation. The simulation showed that the implementation of the thermal gasification process reduced the emission released to the atmosphere by lowering the hazardous sludge volume which is directly transported to the secured landfill. Conclusion, significance and impact study: Several assumptions and adjustments were made to the simulation results using the openLCA software, in the determined scope of study. Therefore, in conclusion, the thermal (gasification) treatment of hazardous sludge is further studied in connection with its implementation at the treatment plant. This was indicated by the acquisition of global warming potential impact category of 673 kg CO2 eq for direct disposal to secured landfill, which reduced to 424 kg CO2 eq during the implementation of thermal treatment. Conversely, there is a reduction in magnitude of impact by 37%.
THE ECO ENZYME APPLICATION ON INDUSTRIAL WASTE ACTIVATED SLUDGE DEGRADATION Wikaningrum, Temmy; Hakiki, Rijal; Astuti, Maryani Paramita; Ismail, Yunita; Sidjabat, Filson Maratur
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY VOLUME 5, NUMBER 2, APRIL 2022
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/urbanenvirotech.v5i2.13535

Abstract

Aim: This study aims to determine whether the application of eco enzyme affects the industrial waste activated sludge degradation and to compare the effects of eco enzyme made from oranges and tomatoes. Methodology and results: The experiments were done on the laboratory scale for 12 days by applying 10% of eco enzyme in the sludge samples. It showed both tomatoes and oranges eco enzymes can decrease the pH from 6.9 to 4.7 compared to control which was stable at 6.9. The reduction of COD, TSS, and VSS by tomato eco enzyme applications were 61%, 39% 41% respectively compared to by orange eco enzyme application that showed a higher reduction of 78%, 45%, 46% respectively. The control samples also show the reduction of COD, TSS, and VSS by 21%, 23%, 30% respectively. The reduction of organic content in the control samples of sludge (8.9%) was higher than the samples with eco enzyme (3.5%). Conclusion, significance, and impact study: The results showed that eco enzyme application significant statistically affected reduction of pH, COD, organic content, but not significant statistically on TSS and VSS reductions. Comparing the application of orange and tomatoes eco enzyme did not show the significant different treatment.
Co-Authors Ani Pujiastuti Astuti, Maryani Paramita Dwi Anggi Agustin Emilius German Filson Maratur Sidjabat Maryani Paramita Astuti Maryani Paramita Astuti Risa Fitria Temmy Wikaningrum Tetuko Kurniawan Yunita Ismail, Yunita