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All Journal Jurnal Ilmu Lingkungan JURNAL TEKNOLOGI LINGKUNGAN Jurnal Ilmiah HUBUNGAN INTERNASIONAL Jurnal Dampak Jurnal Serambi Engineering Jurnal Amplifier: Jurnal Ilmiah Bidang Teknik Elektro dan Komputer Andalasian International Journal of Applied Science, Engineering, and Technology Jurnal Andalas: Rekayasa dan Penerapan Teknologi
Reri Afrianita
Laboratorium Air Jurusan Teknik Lingkungan Universitas Andalas
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Library & Information Science Mechanical Engineering Other

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Journal : Jurnal Ilmu Lingkungan

 1 
The Effect of Variation in Cone Position Heigth on Raw Water Turbidity Removal in Sedimentation Unit Continuous Discharge Flow (CDF) Method as a New Method Ridwan Ridwan; Reri Afrianita; Yar Gustina
Jurnal Ilmu Lingkungan Vol 20, No 1 (2022): January 2022
Publisher : School of Postgraduate Studies, Diponegoro Univer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jil.20.1.58-64

Abstract

Unit sedimentasi metode continuous discharges flow (CDF) adalah metode baru dalam menyisihkan kekeruhan yang menggunakan prinsip tangki bocor secara kontinu dan terkendali. Perubahan ketinggian posisi cone dari dasar zona pengendapan ke bagian atas, dapat memperkecil jarak antara sumber aliran buang akibat bocor yang berasal dari cone sebagai sumber gaya baru yang bekerja terhadap flok, dan pada akhirnya meningkatkan efisiensi penyisihan kekeruhan. Penelitian ini bertujuan untuk menganalisis efisiensi penyisihan kekeruhan air baku pada 3 variasi ketinggian posisi cone di zona pengendapan. Penelitian menggunakan reaktor skala laboratorium kapasitas 240 L/jam yang terdiri dari unit koagulasi terjunan, flokulasi baffle channel dan sedimentasi metode CDF. Unit sedimentasi metode CDF yang digunakan adalah CDF 6% dengan variasi ketinggian posisi cone 0 m, 0,33 m dan 0,66 m dari dasar zona pengendapan. Air baku yang digunakan adalah Sungai Batang Kuranji Kota Padang dengan kekeruhan 25,876 – 26,012 NTU dan tawas sebagai koagulan dalam proses koagulasi. Hasil penelitian menunjukkan efisiensi penyisihan kekeruhan pada ketinggian posisi cone 0 m, 0,33 m dan 0,66 m secara berurutan adalah sebesar 82,88%, 83,86% dan 84,60%. Ketinggian posisi cone 0,66 m dari dasar zona pengendapan adalah posisi optimum dengan efisiensi penyisihan kekeruhan 1,72% lebih besar dari posisi cone di dasar zona pengendapan, yaitu 0 m. Analisis pengaruh ketinggian posisi cone terhadap penyisihan kekeruhan menggunakan korelasi Rank Spearman, menunjukkan pengaruh yang sangat kuat, semakin tinggi posisi cone semakin besar efisiensi penyisihan. Bilangan Reynolds (NRe)dan bilangan Froude (NFr) pada aliran buang ini secara berurutan adalah 23,83 dan 9,33x10-4. ABSTRACTThe continuous discharges flow (CDF) sedimentation unit is a new method for removing turbidity using the principle of a continuous and controlled leaking tank. Changes in the height of the cone position from the bottom of the settling zone to the top, can reduce the distance between the exhaust flow sources due to leakage from the cone as a new force source acting on the floc, and ultimately increase the efficiency of turbidity removal. This study aims to analyze the efficiency of raw water turbidity removal at 3 variations in the height of the cone position in the settling zone. The study used a laboratory-scale reactor with a capacity of 240 L/hour consisting of a plunge coagulation unit, baffle channel flocculation, and CDF sedimentation method. The sedimentation unit for the CDF method used is 6% CDF with variations in the height of the cone position 0 m, 0.33 m, and 0.66 m from the bottom of the settling zone. The raw water used is Sungai Batang Kuranji, Padang City with a turbidity of 25.875 – 26.012 NTU and alum as a coagulant in the coagulation process. The results showed that the efficiency of removal of turbidity at the height of the cone 0 m, 0.33 m, and 0.66 m respectively was 82.88%, 83.86%, and 84.60%. The height of the cone position 0.66 m from the bottom of the settling zone is the optimum position with a turbidity removal efficiency of 1.72% greater than the cone position at the bottom of the settling zone, which is 0 m. Analysis of the effect of the height of the cone position on the removal of turbidity using Spearman's Rank correlation showed a very strong influence, the higher the cone position the greater the removal efficiency. Reynolds number (NRe) and Froude number (NFr) in this exhaust stream are 23.83 and 9.33x10-4, respectively.
The Effect of Cone Area Variations on the Continuous Discharges Flow (CDF) Method Sedimentation Unit as a New Method for Raw Water Turbidity Removal Ridwan Ridwan; Reri Afrianita; Aulia Massyaf Putri; Reski Anggika
Jurnal Ilmu Lingkungan Vol 21, No 3 (2023): July 2023
Publisher : School of Postgraduate Studies, Diponegoro Univer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jil.21.3.659-666

Abstract

The Sedimentation Unit Continuous Discharges Flow (CDF) method is a modification by adding a continuous and controlled discharge flow as a net force acting on the particles to increase the efficiency of turbidity removal by applying the principle of a leaky tank at the bottom of the settling zone. The production capacity of the sedimentation unit using the CDF method is reduced due to the CDF flow of 6% of the flow rate so it needs to be recirculated. This study aims to maintain the production flow rate of the system and increase the efficiency of turbidity removal by recirculating the CDF flow. The research reactor consisted of a coagulation unit, flocculation unit, and sedimentation method using 6% CDF with a flow rate of 240 L/hour and 360 L/hour, and variations in the recirculation flow of 6% CDF to the flocculation unit were 0%, 25%, 50%, 75%, and 100 %. The sedimentation detention time at a flow rate of 240 L/hour and 360 L/hour was 90 minutes and 60 minutes, respectively. Research on a laboratory scale with raw water turbidity of 25,536 NTU. The results showed that the greater the CDF flow recirculation value, the higher the turbidity removal efficiency. Rank Spearman analysis, the correlation value of the CDF flow recirculation value to the efficiency of removal of turbidity is 0.980 and the significance value is 0.00 which means strong and significant. The highest turbidity removal efficiency was achieved at the 100% CDF flow recirculation value, ie at 240 L/hour flow rate was 87.21% with final turbidity 3.267 NTU, while at 360 L/hour flow rate was 82.50% with final turbidity 4,528 NTU. Uprating the flow rate in the experiment was able to produce a final turbidity value that met the drinking water quality standard, which was 5 NTU
Potensi Hilirisasi Instalasi Pengolahan Air dengan Unit Sedimentasi Metode Continous Discharges Flow Ridwan Ridwan; Reri Afrianita; Reski Anggika; Fajri Dwi Arya
Jurnal Ilmu Lingkungan Vol 22, No 6 (2024): November 2024
Publisher : School of Postgraduate Studies, Diponegoro Univer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jil.22.6.1537-1544

Abstract

Inovasi teknologi pengolahan air yang menjamin tercapainya kualitas baku mutu air minum sangat dibutuhkan guna keberlanjutan peningkatan layanan sistem penyediaan air minum sebuah kota. Penelitian ini bertujuan mengembangkan instalasi pengolahan air menggunakan bak sedimentasi dengan continuous discharges flow method (CDF) yang merupakan inovasi baru dalam menyisihkan kekeruhan air. Teknologi pengolahan air dirancang pada kapasitas desain 240 L/Jam dengan rangkaian proses koagulasi berupa terjunan air, proses flokulasi dengan sistem sekat sebanyak 6 kompartemen, bak sedimentasi metode CDF dengan variasi nilai CDF 10%, 11%, 12%, dan 13% dari kapasitas inlet, besaran resirkulasi aliran buang CDF 100% ke proses flokulasi, perbandingan luas cone terhadap luas permukaan bak sedimentasi adalah 13%, dan ketinggian cone dari dasar zona pengendapan sebesar 66%, dan unit filtrasi dengan media pasir kuarsa. Penelitian dilakukan dua kali pengulangan dengan kekeruhan air baku artifisial 115,686 NTU. Hasil penelitian menunjukkan efisiensi penyisihan parameter kekeruhan rata-rata pada unit sedimentasi dengan metode CDF pada variasi nilai CDF 10%, 11%, 12%, dan 13% secara berturut adalah 94,00%, 94,84%, 95,51% dan 96,28% dengan nilai kekeruhan secara berturut adalah 6,936 NTU, 5,967 NTU, 5,192 NTU dan 4,302 NTU. Semakin besar nilai CDF, maka semakin besar efisiensi penyisihan kekeruhan. Efisiensi penyisihan kekeruhan rata-rata secara keseluruhan teknologi pengolahan air dengan unit sedimentasi metode CDF pada variasi nilai CDF 10%, 11%, 12%, dan 13% secara berturut adalah 97,86%, 98,17%, 98,70% dan 98,75% dan nilai kekeruhan akhir hasil pengolahan secara berturut adalah 2,613 NTU, 1,997 NTU, 1,531 NTU dan 1,290 NTU yang memenuhi baku mutu air minum, yaitu kurang dari 5 NTU dan memiliki potensi untuk dihilirisasi dalam skala lapangan.
Co-Authors Amirul Luthfi, Amirul Aroiya Alawiyah Ary Zamzamy Asri Astia Ningsih Astri Astia Ningsih Aulia Massyaf Putri Danar Adi Laksono Danir, Resi Meilinta Danir Fajri Dwi Arya Gunawan, Eko Amri Hadi, Refa Nabila Hanalde Andre Laksono, Heru Dibyo Latif , Melda Melda Latif Mumuh Muharam Novizon, Novizon Pratama, Rizki Wahyu Putra, Ilham Hagi Reski Anggika Reski Anggika Ridwan Ridwan Ridwan, Ridwan Rifka Indriani Tivany Edwin Tomas, Micko Vera Surtia Bachtiar Yar Gustina Yogi Kurniawan, Yogi Yommi Dewilda Zulkarnaini Zulkarnaini