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All Journal Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Jurnal Ilmu Lingkungan Media Ilmiah Teknik Lingkungan REACTOR : Journal of Research On Chemistry And Engineering Indonesian Journal of Community Services Cel
Niesa Hanum Mistoro
Program Studi Teknik Lingkungan, Fakultas Teknik Sipil Dan Perencanaan, Universitas Islam Indonesia
Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Energy Environmental Science Other

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Evaluasi Kinerja Penyisihan Kekeruhan dan Penggunaan PAC dalam Operasional Harian di SPAM Katulampa, Kota Bogor Niesa Hanum Mistoro; Enry Adiarto Guntoro; Noviani Ima Wantoputri; Dahlia Anggita Zahra; Makmur Gunawan; Muhammad Yacob
REACTOR: Journal of Research on Chemistry and Engineering Vol. 7 No. 1 (2026)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v7i1.90

Abstract

This study evaluates turbidity removal performance and daily Polyaluminum Chloride (PAC) use at SPAM Katulampa, Bogor, based on routine operational data under fluctuating raw water turbidity. Daily operational data from 10 February to 10 March 2026 were analysed, including raw water turbidity, treated water turbidity, PAC consumption, and flow rate. Descriptive statistics, time-series plots, turbidity removal calculation, and exploratory scatter plots with linear trendlines were used to assess treatment stability and the relationship between PAC use and turbidity. Raw water turbidity varied widely from 12.00 to 262.97 NTU, while treated water turbidity remained low at 0.52–0.91 NTU, below the 3 NTU national turbidity limit. Turbidity removal ranged from 94.9% to 99.8%, indicating stable performance of the treatment process. Daily PAC use ranged from 324.75 to 519.60 kg/day. However, the linear relationships between raw water turbidity and PAC use (R² = 0.0148), and between PAC use and treated water turbidity (R² = 0.0021), were very weak. The results indicate that low treated-water turbidity was maintained despite high raw-water variability, but this stability cannot be attributed solely to PAC use. It is more appropriately understood as the combined performance of coagulation, flocculation, sedimentation, filtration, and routine operational control. Higher-resolution operational data are needed to evaluate real-time PAC dose response and process optimization.
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.v23i2.518-532

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
Pemanfaatan Sampah Plastik Multilayer sebagai Campuran pada Bahan Bangunan Ramah Lingkungan dengan Produk Batako, Paving Blok dan Roster Hijrah Purnama Putra; Muhammad Zian Sulthon; Niesa Hanum Mistoro; Malik Mushtofa; Fadhilah Ramadhana; Reza Surya Ibrahim; Dieska Shafira Cahyadhy; Andri Pangestu Ashari
Jurnal Ilmu Lingkungan Vol 24, No 3 (2026): May 2026
Publisher : School of Postgraduate Studies, Diponegoro Univer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jil.24.3.672-687

Abstract

Peningkatan timbulan sampah plastik multilayer yang sulit didaur ulang mendorong perlunya inovasi pemanfaatan material alternatif pada sektor konstruksi non-struktural. Penelitian ini mengkaji pemanfaatan plastik multilayer sebagai substitusi parsial agregat halus pada batako, paving blok, dan empat motif roster beton melalui lima variasi campuran (V1–V5). Metode penelitian dilakukan melalui pendekatan eksperimental laboratorium yang mencakup proses pencampuran, pencetakan, curing, serta pengujian kuat tekan, penyerapan air, dan ketahanan aus (khusus paving blok). Kebaruan penelitian ini terletak pada pengujian simultan terhadap tiga jenis produk menggunakan sumber plastik dan kerangka evaluasi yang sama. Pada batako V2, kuat tekan berada pada kisaran 26.42kg/cm² tetapi memiliki penyerapan air sebesar 67,01%, sehingga tidak terdapat variasi dengan penambahan plastik yang memenuhi standar baku mutu. Paving blok V2 memiliki kuat tekan 8,62 MPa, penyerapan air 7,88%, serta ketahanan aus 0.46 mm/menit, memenuhi persyaratan standar baku mutu D. Produk roster menunjukkan karakteristik berbeda berdasarkan geometri. Roster motif 2 menunjukkan kuat tekan 22,01–33,76 kg/cm² dengan penyerapan air 10,45–13.67%, sedangkan motif 4 menghasilkan kuat tekan rata-rata 25,11 kg/cm² dengan nilai antar benda uji berkisar antara 12,94–47,48 kg/cm² dan penyerapan air rata-rata 11,22–13,68% pada variasi V2–V3. Akumulasi potensi teoritis pemanfaatan plastik mencapai 544,90 kg/hari, dengan nilai terbesar terdapat pada paving blok V2 sebesar 468,00 kg/hariTemuan ini menunjukkan adanya potensi pemanfaatan plastik multilayer pada produk konstruksi non-struktural berdasarkan skenario kapasitas produksi. Namun, manfaat lingkungannya belum dinilai secara menyeluruh melalui analisis daur hidup, pengukuran emisi, maupun konsumsi energi.
Stakeholder Analysis of a Climate-Smart Agroforestry Community Service Program in the Dieng Highlands Ikrom Mustofa; Dhandhun Wacano; Diah Ayu Prawitasari; Akhmad Irfan; Niesa Hanum Mistoro
Indonesian Journal of Community Services Cel Vol. 5 No. 2 (2026): Indonesian Journal of Community Services Cel
Publisher : Research and Social Study Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70110/ijcsc.v5i2.149

Abstract

Background: Highland farming in the Dieng landscape faces land degradation and climate uncertainty. Technical recommendations may not endure when authority, work, and benefits are not negotiated among local actors.Aims: This community-service evaluation mapped stakeholder interests, influence, participation, and relationships in a climate-smart agroforestry program in Serang Village, Central Java.Methods: Activities were held on 4–5 October 2025, with 18 attendance records on the first day and 19 on the second. Evidence came from documents, field observation, group dialogue, semi-structured conversations, and UII–UNSIQ team validation.Result: Stakeholders were assessed through a power–interest matrix, salience attributes, and the IAP2 participation spectrum. Farmer groups, UII, and UNSIQ emerged as key players; the village government as a context setter; and KWT/PKK and students as interested actors with limited decision power. Participation remained at involve–collaborate rather than empowerment. Priorities are a joint demonstration plot, stronger KWT/PKK decision roles, village coordination, shared monitoring, and selective engagement with extension and government. The findings also show that combining power–interest, stakeholder salience, and participation analysis can reveal differences in influence that may not be visible from attendance or participation records alone.
Co-Authors Akhmad Irfan Andri Pangestu Ashari Dahlia Anggita Zahra Dahlia Anggita Zahra Dhandhun Wacano Diah Ayu Prawitasari Dieska Shafira Cahyadhy Enry Adiarto Guntoro Enry Adiarto Guntoro Fadhilah Ramadhana Henny Sudibyo Ikrom Mustofa Johan Syafri Mahathir Ahmad Makmur Gunawan Makmur Gunawan Malik Mushtofa Muhammad Yacob Muhammad Yacob Muhammad Zian Sulthon Noviani Ima Wantoputri Putra, Hijrah Purnama Reza Surya Ibrahim Sri Puji Saraswati