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All Journal Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Media Ilmiah Teknik Lingkungan
Niesa Hanum Mistoro
Universitas Islam Indonesia
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Environmental Science

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Evaluation of Preventive Operational Control in Maintaining Treated Water Turbidity Stability at SPAM Katulampa, Bogor City: Evaluasi Pengendalian Operasional Preventif dalam Menjaga Stabilitas Kekeruhan Air Hasil pada SPAM Katulampa Kota Bogor Niesa Hanum Mistoro; Enry Adiarto Guntoro; Noviani Ima Wantoputri; Makmur Gunawan; Muhammad Yacob
Media Ilmiah Teknik Lingkungan (MITL) Vol. 11 No. 2 (2026): Media Ilmiah Teknik Lingkungan (MITL)
Publisher : ​Institute for Researches and Community Services Universitas Muhammadiyah Palangkaraya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33084/mitl.v11i2.13478

Abstract

Treated water turbidity stability is an important indicator of operational reliability in surface-water-based drinking water treatment plants. This study evaluated preventive operational control at SPAM Katulampa, Bogor City, using daily operational data from 10 February to 10 March 2026 and field observations. The evaluated parameters included raw and treated water turbidity, raw water flow rate, turbidity removal efficiency, and preventive control practices in each treatment unit. Data were analyzed using descriptive statistics and the coefficient of variation, followed by development of a preventive operational control matrix. Raw water turbidity fluctuated markedly, with an average of 58.83 NTU, a range of 12.00–262.98 NTU, and a coefficient of variation of 88.49%. In contrast, treated water turbidity remained stable, averaging 0.61 NTU with a range of 0.52–0.91 NTU and a coefficient of variation of 16.83%, consistently meeting the 3 NTU drinking water standard. Stability was supported by integrated controls at the intake, coagulation, flocculation, sedimentation, filtration, reservoir, and overall operation stages. Key measures included screening, coagulation control, sludge draining, filter backwashing, media maintenance, and final water quality verification. The findings confirm that stable treated water quality results from coordinated preventive control across the treatment train.
Performance Evaluation and Operational Optimization of a Fine-Bubble Porous–Venturi Aeration System Niesa Hanum Mistoro; Sri Puji Saraswati; Johan Syafri Mahathir Ahmad; Henny Sudibyo; Dahlia Anggita Zahra
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 23, No 2 (2026): July 2026
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v0i0.%p

Abstract

Aeration is the most energy-intensive unit in wastewater treatment systems, particularly in shallow decentralized reactors with limited hydrostatic pressure, which, which reduces oxygen transfer efficiency. However, systematic evaluations of integrated porous–Venturi microbubble systems under shallow-water conditions are limited. This study aims to address this gap by investigating and optimizing a fine-bubble porous–Venturi microbubble generator (MBG) using laboratory-scale experiments. Clean water experiments were conducted in a 200 L batch reactor with two liquid flow rates (71.6 and 103.8 L/min) and four gas flow rates (0.15–0.60 L/min). Aeration performance was assessed using the volumetric oxygen mass transfer coefficient (KLa(20)), standard oxygen transfer rate (SOTR), and specific aeration efficiency (SAE), supported by one-way ANOVA. The results showed that the gas flow rate influenced  KLa(20) and SOT,R whereas the liquid flow rate had a dominant effect on SAE. The optimal operating conditions were identified as QL = 71.6 L/min and QG = 0.45 L/min, achieving KLa(20) of 2.23 h⁻¹ and SAE exceeding 40 kg O₂/kWh. The findings showed that optimum gas–liquid interaction leads to energy-efficient aeration performance rather than maximum flow rate supply. It also provides practical design insights for optimizing aeration systems in shallow and decentralized wastewater treatment applications
Co-Authors Dahlia Anggita Zahra Enry Adiarto Guntoro Henny Sudibyo Johan Syafri Mahathir Ahmad Makmur Gunawan Muhammad Yacob Noviani Ima Wantoputri Sri Puji Saraswati