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All Journal Jurnal Dampak Buletin Ilmiah Nagari Membangun Warta Pengabdian Andalas: Jurnal Ilmiah Pengembangan Dan Penerapan Ipteks Jurnal Amplifier: Jurnal Ilmiah Bidang Teknik Elektro dan Komputer Andalasian International Journal of Applied Science, Engineering, and Technology
Reri Afrianita
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POTENSI FLY ASH SEBAGAI ADSORBEN DALAM MEYISIHKAN LOGAM BERAT CROMIUM (Cr) PADA LIMBAH CAIR INDUSTRI Reri Afrianita; Yommi Dewilda
Jurnal Dampak Vol 11, No 1 (2014)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/dampak.11.1.67-73.2014

Abstract

Penelitian ini bertujuan untuk melihat kapasitas fly ash sebagai adsorben dalam penyisihan logam kromium (Cr) dalam larutan artifisial. Konsetrasi awal Cr yang digunakan adalah adalah 1,6 mg/l merupakan konsentrasi Cr tertinggi hasil sampling pada percetakan koran X di Kota Padang. Adsorpsi dilakukan secara batch dengan variasi diameter adsorben, berat adsorben, waktu kontak dan kecepatan pengadukan. Dari hasil penelitian didapat kondisi optimum untuk diameter adsorben 0,14-0,075 mm; berat adsorben 1 g; pH adsorbat 2; kecepatan pengadukan 120 rpm dan waktu kontak 60 menit. Pengaruh parameter terhadap kapasitas adsorpsi adalah semakin kecil diameter partikel, maka semakin luas permukaan serapannya, peningkatan kapasitas penyerapan berbanding terbalik dengan jumlah adsorben yang digunakan, pengikatan ion logam Cr sangat efektif pada suasana asam dengan pH 2, kecepatan pengadukan yang rendah menyebabkan kurang efektifnya tumbukan yang terjadi antara adsorben dengan adsorbat dan jika sebaliknya menyebabkan struktur adsorben cepat rusak, dan pada waktu kontak menit ke-60 fly ash telah jenuh atau mencapai titik keseimbangan dalam mengadsorpsi ion logam Cr yang terdapat dalam larutanKata Kunci: Cromium (Cr), fly ash, Kapasitas Adsorpsi
STUDI PENENTUAN KONDISI OPTIMUM FLY ASH SEBAGAI ADSORBEN DALAM MENYISIHKAN LOGAM BERAT KROMIUM (Cr) Reri Afrianita; Yommi Dewilda
Jurnal Dampak Vol 10, No 2 (2013)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/dampak.10.2.104-110.2013

Abstract

Penelitian ini bertujuan untuk menentukan kondisi optimum fly ash sebagai adsorben dalam menyisihan logamkromium (Cr) dengan menggunakan larutan artifisial. Konsentrasi awal Cr yang digunakan adalah adalah1,6mg/l merupakan konsentrasi Cr tertinggi hasil sampling pada percetakan koran X di Kota Padang.Mekanisme adsorpsi dilakukan secara batch dengan variasi diameter adsorben, berat adsorben, waktu kontakdan kecepatan pengadukan. Hasil penelitian ini didapat kondisi optimum untuk diameter adsorben 0,14-0,075mm; berat adsorben 1 g; pH adsorbat 2; kecepatan pengadukan 120 rpm dan waktu kontak 60 menit. Variasikondisi optimum ini menunjukkan bahwa pengikatan ion logam Cr sangat efektif pada suasana asam,kecepatan pengadukan yang rendah menyebabkan kurang efektifnya tumbukan yang terjadi antara adsorbendengan adsorbat dan jika sebaliknya menyebabkan struktur adsorben cepat rusak, dan pada waktu kontakmenit ke-60 fly ash telah jenuh atau mencapai titik keseimbangan dalam mengadsorpsi ion logam Cr yangterdapat dalam larutanKata Kunci: Kromium (Cr), fly ash, kondisi optimum.
Pelatihan dan Pendampingan Jaringan Komputer dengan Mikrotik di Pondok Pesantren Modern Terpadu Dr. Muhammad Natsir Alahan Panjang Kabupaten Solok Heru Dibyo Laksono; Reri Afrianita; Mumuh Muharram; Novizon Novizon
Warta Pengabdian Andalas Vol 28 No 2 (2021)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jwa.28.2.76-83.2021

Abstract

Training of Computer network using Miktrotik at the Integrated Modern Islamic Boarding School of Dr. Muhammad Natsir at Alahan Panjang is one of the solutions to overcome the problem of the effectiveness and efficiency computer user. The training was started by a field survey to laboratory of the information and communication technology (ICT) at the School. In this survey, discussions were held on what problems are very important and get priority to find solutions in increasing the effectiveness and efficiency of computer use at the School. The results of the survey agreed that computer network training with Mikrotik would be held in order to increase the effectiveness and efficiency of computer use on it. The second activity was the preparation of computer network training with Mikrotik. Preparation was carried out in the form of discussions with teammates to determine materials and methods that were more efficient and effective in the implementation of computer network training with Mikrotik at the Information and Communication Technology (ICT) laboratory. The results of the discussion agreed that the training would be provided in the form of presentations and hands-on practice. The third activity was the implementation of computer network training with mikrotik. This training was provided for 2 days, namely Saturday and Sunday. The first day was done by shared knowledge about the basics of computer networks and Mikrotik. The second day, students did a computer network training with Mikrotik. The fourth activity was the evaluation of computer network training activities with Mikrotik, to evaluate the activities that have been carried out and to obtain suggestions and input for future improvements.
Sistem Pengatur Tegangan Otomatis : Analisa Peralihan Dengan Pengendali Tunggal Dan Kaskade Heru Dibyo Laksono; Novizon Novizon; Melda Latif; Eko Amri Gunawan; Reri Afrianita
JURNAL AMPLIFIER : JURNAL ILMIAH BIDANG TEKNIK ELEKTRO DAN KOMPUTER Vol 11, No 2 (2021): Amplifier November 2021 Vol 11 No 2
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/jamplifier.v11i2.19133

Abstract

This journal describes the design and analysis of the response of a single controller and cascade direct current type of Automatic Voltage Regulator (AVR) system. The direct current AVR system is represented form of a transfer function. For single and cascade controllers, it is designed using a parallel architecture using MATLAB software with predetermined design criteria. The types of controllers used consist of Proportional Differential (PD), Proportional Integral (PI), Proportional Integral Differential (PID), Proportional Differential with First Order Filters in the Differential Section (PDF) and Proportional Integral Differentials with First Order Filters in the Differential Section(PIDF). For the transition analysis, the observed parameters consist of rise time, peak time, steady state time, maximum pass value and peak value. The results of the analysis show that the controllers that meet the design criteria are Proportional Differential (PD) controllers and Proportional Differential controllers with First Order Filters in Differential Sections (PDF) for single controllers and cascade controllers. For a single controller, the value of the Proportional constant (Kp) is 0.6280 and the value of the Differential constant (KD) is 0.1710 for the Proportional Differential (PD) controller. Proportional constant value (Kp) is 0.6130, Differential constant value (KD) is 0.1710 and filter constant value (Tf) is 0.0009 for Proportional Differential controller with First Order Filter in Differential Section (PDF). Cascade controllers and Proportional Differential (PD) controllers, the Proportional constant (Kp) is 1.7300 and the Differential constant (KD) is 0.0242 for the inner circle (C2). Outer ring controller (C1), the proportional constant (Kp) is 179,000 and the Differential constant (KD) is 2.4600. Cascade controllers and Proportional Differential controller types with First Order Filters in the Differential Section (PDF), the Proportional constant (Kp) value is 1.5900, the Differential constant (KD) value is 0.0246, the filter constant value (Tf) is 0.0018 for the inner circumference (C2 ). For the outer ring controller (C1), the Proportional constant (Kp) value is 134,0000, the Differential constant (KD) value is 2.2900 and the filter constant value (Tf) is 0.00008.
The Effect of Coagulants Variations in the Coagulation Unit on the Efficiency of Raw Water Turbidity Removal Sedimentation Unit Continuous Discharges Flow (CDF) as a New Method Ridwan Ridwan; Reri Afrianita; Resi Meilinta Danir Danir
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 1 No. 02 (2021): November 2021
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v1i02.17

Abstract

Variations in the type of coagulant resulted in different floc characteristics. The sedimentation unit with continuous discharges flow or (CDF) method is a sedimentation unit that applies the leaking tank phenomenon, so it is possible that it will affect the condition of the floc that has been formed and in the end can affect the efficiency of turbidity removal. This study was to determine the effect of the type of coagulant in the coagulation unit on the removal of raw water turbidity in the sedimentation unit using the CDF method with a 6% discharge ratio to the product discharge. The raw water used is Sungai Batang Kuranji water with a turbidity of 27.63 NTU. The experimental reactor consisted of a coagulation-flocculation unit and a sedimentation unit with various coagulants being Poly Aluminum Chloride (PAC), Ferric Chloride, and Alum. The results showed that the efficiency of removing turbidity from the Sungai Batang Kuranji by PAC coagulant was 90.12%, Ferric Chloride 86.99%, and Alum 81.72%. The Spearman correlation value of the coagulant variable on the efficiency of the removal of turbidity is 0.948, indicating a unidirectional effect between the two variables. The addition of 6% CDF flow in the settling zone did not break the floc because the flow formed was still laminar.
The Study of Raw Water Turbidity Removal in Sedimentation Unit Continuous Discharges Flow (CDF) Method Using Plate Settlers Ridwan Ridwan; Reri Afrianita; Refa Nabila Hadi
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 2 No. 3 (2022): November 2022
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v2i03.38

Abstract

The sedimentation unit using the continuous discharges flow (CDF) method can remove raw water turbidity of 91.09% with initial turbidity of 75.248 NTU. The performance of the sedimentation unit using the CDF method needs to be tested at high turbidity, which is more than 100 NTU. Sedimentation using the CDF method with the addition of plate settlers is an alternative that can be done by increasing the turbidity value. This study aims to determine the performance of the sedimentation unit using the CDF method with the addition of plate settlers in the removal of high turbidity. The study used a laboratory-scale reactor of 240 L/hour, with units consisting of plunge coagulation, baffle channel flocculation and a 5% CDF method sedimentation unit with plate settlers. The study used artificial raw water with variations in turbidity of 110.355 NTU, 132.035 NTU, and 153.338 NTU. The research shows that the efficiency of removal of turbidity on average for the variation of turbidity is 92.32%, 91.25%, and 89.87%, respectively. The correlation value and significance of Rank Spearmen from the variation of turbidity to reactor performance are -0.926 and 0.00, respectively. In other words, the more turbid the raw water, the lower the reactor performance
Perencanaan Pengembangan Modul Pembelajaran Matematika Untuk Warga Belajar Paket C Berbasis Open Source (Scilab) di Pusat Kegiatan Belajar Masyarakat (PKBM) Karang Putih Heru Dibyo Laksono; Reri Afrianita; Novizon Novizon
Warta Pengabdian Andalas Vol 30 No 2 (2023)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jwa.30.2.339-345.2023

Abstract

The planning for the development of a mathematics learning module for residents studying package C based on the open-source platform Scilab at the Community Learning Center (PKBM) Karang Putih is one of the solutions to address the lack of facilities, especially open-source learning media. The activity plan started with discussions and information sharing. In this stage, discussions and experiences were shared regarding the Scilab-based mathematics learning module for package C learners. The second activity is the analysis of the module's needs. Based on the discussion's outcomes, decisions will be made about the type of module to be created, the required features, potential challenges, necessary resources for the development process, and so on. The third activity is the design of the learning module. During this phase, the interface and layout of the open-source Scilab-based mathematics learning module are designed. The final activity is the development of the learning module. This stage involves implementing the outcomes of the analysis and design of the mathematics learning module. It also includes testing to ensure that all functions work as intended. By following this planned process, the development of the mathematics learning module for package C learners using Scilab will be expected to provide a valuable open-source learning resource at the Community Learning Center (PKBM) Karang Putih.
PRELIMINARY DESIGN SISTEM PENYEDIAAN AIR BERSIH PADA KAMPUNG TEMATIK IKAN HIAS DI KAMPUNG SARASAH KECAMATAN BUNGUS TELUK KABUNG KOTA PADANG Ridwan Ridwan; Vera Surtia Bachtiar; Reri Afrianita; Yega Serlina
BULETIN ILMIAH NAGARI MEMBANGUN Vol 6 No 3 (2023)
Publisher : LPPM (Institute for Research and Community Services) Universitas Andalas Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/bina.v6i3.489

Abstract

Kampung Sarasah, as a thematic village, has had economic potential in the form of freshwater ornamental fish farming activities since 2020. The unavailability of a clean water supply system is one of the hindering factors for the growth and development of the area. Therefore, a preliminary study is needed for the provision of clean water supply in the area in the form of a preliminary design. This activity aims to provide a description and socialization of the technical plan for clean water supply in Kampung Sarasah, Padang City. The Preliminary design of the clean water supply system is carried out in Kampung Sarasah, Bungus Timur Village, Bungus Teluk Kabung Sub-District, Padang City. The preliminary design of the clean water supply system in Kampung Sarasah is conducted in several key stages, including a survey of the community's conditions and mapping of the Kampung Sarasah area, observation, socialization, and field measurements using Global Positioning System (GPS) equipment and the utilization of Google Earth application for selecting the route of transmission and distribution pipes for the clean water supply system plan. The capacity of the clean water treatment installation in the Kampung Sarasah area is 1.0 L/second, consisting of coagulation-flocculation unit, sedimentation unit, filtration unit, and disinfection unit. The capacity of the main distribution pipe network in the area is 1.2 L/second, using 2-inch HDPE pipes with a length of approximately 1.7 km. The estimated cost of the Sarasah Thematic Village Clean Water Supply System, based on community empowerment and excluding the procurement and construction of Water Treatment Plant and 15 m³ Reservoir, is Rp. 144,050,400. Following the preliminary design of the Sarasah Thematic Village Clean Water Supply System, it is recommended to proceed with detailed engineering design to support the smooth development of the system.
Co-Authors Eko Amri Gunawan Laksono, Heru Dibyo Melda Latif Mumuh Muharram Novizon, Novizon Refa Nabila Hadi Resi Meilinta Danir Danir Ridwan Ridwan Ridwan Ridwan Vera Surtia Bachtiar Yega Serlina Yommi Dewilda