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Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
Published by Universitas Diponegoro
ISSN : 1907817X     EISSN : 25500023     DOI : -
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences
Arjuna Subject : -
Articles 25 Documents
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Search results for , issue "Vol 22, No 3 (2025): November 2025" : 25 Documents clear
Optimizing Nutrient Removal in Agriculture Wastewater Using Electrocoagulation Technology Oktiawan, Wiharyanto; Sarminingsih, Anik; Hadiwidodo, Mochtar; Purwono, Purwono
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 22, No 3 (2025): November 2025
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v22i3.1028-1038

Abstract

Water pollution exacerbates global water crises by reducing freshwater availability and quality. Agricultural wastewater, containing pesticides, herbicides, fertilizers, and organic matter, can contaminate water bodies if untreated. This study optimizes electrocoagulation (EC) parameters—voltage, time, and calcium concentration—to maximize nitrogen compound removal using response surface methodology (RSM). Results show a nitrate reduction of 88.37% (2.960 mg/L) at 45 V, 15 minutes, and 7 mg/L calcium, while ammonia was reduced by 99.37% (0.016 mg/L) at 30 V, 1.5 minutes, and 4.5 mg/L calcium. Calcium enhances coagulation by forming calcium hydroxide. The optimal conditions for nitrate and ammonia removal (3.709 mg/L and 1.338 mg/L) were 45 V, 15 minutes, and 5.09 mg/L calcium. EC also removed 96.73% of iron, with magnesium concentrations remaining very low (0.001 mg/L).
Analysis of Soil Fertility and Sustainability of Shallot Intensive Farming Nugraha, Septian Hadi; Suryaningtyas, Dyah Tjahyandari; Hariyadi, Hariyadi
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 22, No 3 (2025): November 2025
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v22i3.766-781

Abstract

Larangan District is one of the shallot-producing areas that the government prioritizes for agricultural intensification. The high intensity of agriculture in Larangan District causes soil fertility and sustainability disparities. This research evaluates soil fertility and the sustainability of shallot farming intensification activities in Larangan District, Brebes Regency. Soil fertility evaluation used two different approaches: Base Cation Saturation Ratio (BCSR), which referred to Koppitke & Menzies research in 2007 and assessment through a combination of soil chemical properties, as referred to Soil Research Center of Indonesia. Sustainability analysis was carried out using the Rapid Appraisal for Farming (RAP-Farm) approach with a multi-aspect sustainability analysis method, with a total of 6 aspects (ecological, economic, social, institutional, technological, and logistics, and infrastructure) with 36 factors. The results of the research show that Larangan District has a moderate soil fertility status, with a nutrient unbalance from cation ratio analysis. Sustainability status shows a less sustainable status with aspects that have values below the limit, namely ecology, economics, and technology.
Microplastics Removal Strategies in Aquatic Environments Widiyanto, Edhi; Istirokhatun, Titik; Andarani, Pertiwi; Susanto, Heru; Desiriani, Ria; Apriliana, Pamella
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 22, No 3 (2025): November 2025
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v22i3.688-711

Abstract

Microplastics (MPs) have been globally detected in aquatic environments. The abundance of MPs contributed to the negative effects on aquatic ecosystems. Thus, it’s critical to create effective solutions for removing MPs from water. In this review, we compared several methods, including physical, physicochemical, and biological approaches, towards membrane filtration. The physical filtration technology is the simplest way in comparison with other methods. However, the removal ability of physical filtration against smaller MPs than 20 ?m becomes a crucial concern. Then, the other option is an adsorption method. Although the adsorption option is an inexpensive method, the undesirable aspect during adsorbent usage may not be environmentally friendly in aquatic systems. The similar problem is also demonstrated by chemical approaches in terms of coagulation and electrocoagulation treatment. Consequently, the biological methods were found to be less toxic to the environment. Even though it provides safe conditions to the environment, the biological approach needs a long time to degrade MPs. To overcome their disadvantages, the membrane technology offers efficient removal of MPs and no addition of chemical usage. However, the main point to pay attention to is that each technology has benefits and drawbacks. Therefore, the application of multiple technologies for MPs removal is considered. 
Utilization of Tofu Wastewater as a Fish Supplement: Impact on Fish and Economic Analysis Aufa, Muhammad Azri; Utama, Gemilang Lara; Mansyur, Mansyur; Subhan, Ujang; Sukarman, Irwa Sukma bin
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 22, No 3 (2025): November 2025
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v22i3.950-963

Abstract

Tofu liquid waste produced by the tofu industry in rural areas is often not reprocessed and has the potential to cause pollution if left untreated, so it is necessary to utilize tofu liquid waste which is the main idea in this research. The aim of this research is to analyze the potential for utilizing tofu liquid waste into fish supplements through the fermentation process with EM4 and Nitrobacter Plus and analyzing the economic and environmental benefits of utilizing tofu liquid waste into fish supplements. This research was conducted using an experimental method using a Completely Randomized Design (CRD) with 4 treatments and 3 replications. This research result showed that the provision of fish supplements from fermented tofu liquid waste has no significant effect on absolute weight growth, absolute length growth, specific growth rate, feed conversion ratio and survival rate. Based on the results of the economic analysis, the utilization of tofu liquid waste as a fish supplement was considered economically feasible with a Benefit Cost Ratio (BCR) of 1.285, Net Present Value (NPV) of Rp. 16,320,630,763 and Return on Investment (ROI) of 48.4%.
Land Use Change Impact on Erosion and Sedimentation in Kreo Sub-Watershed, Central Java Napitupulu, Ruth Erditha; Andawayanti, Ussy; Bisri, Mohammad; Putra, Rizky Almarendra Wirawan
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 22, No 3 (2025): November 2025
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v22i3.820-836

Abstract

Ministry of Forestry has designated Kreo Sub-watershed, part of Garang Watershed, a critical area due to high erosion rates contributing to flooding in Semarang. Rapid land use changes accelerate environmental degradation, increasing erosion and sedimentation risks. This study measures erosion and sedimentation rates in Kreo Sub-watershed using SWAT (Soil and Water Assessment Tool), determines Erosion Hazard Index, and proposes erosion control solutions based on Land Rehabilitation and Soil Conservation Analysis (ARLKT) with vegetative conservation. ARLKT approach includes simulating new land use scenarios to assess their impact on erosion reduction. To ensure SWAT modelling accurately represents field conditions and not overestimate, allowing conservation recommendations based on ARLKT applied appropriately, a field-based sedimentation analysis also conducted. The study utilizes rainfall, soil type, slope, and land use data in 2019 and 2024 from satellite imagery and validated using a confusion matrix. Results indicate a shift in Erosion Hazard Index from predominantly ‘Moderate’ in 2019 to ‘High’ in 2024, underscoring urgent need for sustainable watershed management. By integrating remote sensing, field validation, and hydrological modeling, this study offers a precise, data-driven approach to erosion control. The findings serve critical reference for policymakers in developing effective conservation strategies to enhance watershed resilience.
Optimization of District Metered Areas for Reducing Non-Revenue Water Swantara, Dewa Made Indra Widnyana; Razif, Mohammad; Pramitasari, Yantri Novia
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 22, No 3 (2025): November 2025
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v22i3.922-936

Abstract

Non-revenue water (NRW) is a significant issue for water supply in Indonesia, with a national NRW rate of 33.7% in 2022 and even higher at PT Air Minum Giri Menang (PT AMGM) at 36.21%. Although District Metered Areas (DMA) were implemented in 2018, their effectiveness has been limited due to poor monitoring. This study evaluates the current DMA conditions by creating a water balance and using EPANET 2.2 software for analysis, along with formulating optimization strategies through technical, financial, and institutional assessments. The research identifies fifteen DMAs, with five being well-established. Two DMAs were chosen for optimization. Simulations showed that many pipes in these DMAs did not meet flow speed standards. Water pressure in DMA Graha Permata Kota was fully satisfied at 100%, while DMA Elit Kota Mataram achieved 84.5%. The study noted a significant NRW reduction by an average of 27.26% in the selected DMAs. The total repair cost was Rp 14,725,300, leading to additional annual revenue of Rp 128,747,424 and a positive feasibility analysis. Institutional performance was rated as "good," but an increase of 14 field staff for water loss control is needed.
Sustainable Valorization of Used Biochar for Hexavalent Chromium Removal from Wastewater and Soil Fertility Enhancement Anwar, Dedy; Neliyati, Neliyati; Gusniwati, Gusniwati; Jasminarni, Jasminarni; Rohman, Arif; Syarifuddin, Hutwan; Nainggolan, Ellyas Alga; Wibowo, Yudha Gusti
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 22, No 3 (2025): November 2025
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v22i3.723-750

Abstract

Environmental pollution from wastewater and soil contamination remains a critical global concern, with current treatment methods often facing limitations in scalability, cost, or environmental safety. Biochar, a carbon-rich material derived from biomass pyrolysis, has emerged as a sustainable adsorbent for heavy metals and organic pollutants. While its use in environmental remediation is well-established, the fate and reuse of spent biochar have received limited attention. This comprehensive review explores the untapped potential of used biochar, particularly for the removal of hexavalent chromium (Cr(VI)) from wastewater and its role in enhancing soil fertility. We critically analyze current practices, mechanisms of Cr(VI) removal using spent biochar, regeneration techniques, and field applications, while highlighting circular economy frameworks that promote resource efficiency. The study integrates empirical evidence from recent case studies and offers policy recommendations to support large-scale implementation. This work is the first to provide an integrative review of the reuse of spent biochar with a dual focus on wastewater treatment and soil enhancement, underpinned by a circular economy perspective. It addresses critical research gaps by evaluating regeneration techniques, post-use functionality, and practical field applications, thereby positioning spent biochar as a viable, low-cost, and eco-friendly alternative in environmental management systems.
Performance Evaluation of Local Organism in Wastewater Treatment Abdulgani, Hamdani; Wati, Hessy Rahma; Fadhil, Muhammad
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 22, No 3 (2025): November 2025
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v22i3.1015-1027

Abstract

Biofilters are a type of attached growth biological treatment that is considered effective among other biological treatments because of their more affordable energy operating costs, easy maintenance and operational requirements, and low environmental impact. However, there is still minimal research related to the use of local microorganisms for biological wastewater treatment. Therefore, this study aims to improve biological wastewater treatment in the cracker industry in Indramayu using local microorganisms equipped with a biofilter that utilizes natural andesite stone as a medium for microorganism growth. The best reduction in BOD anaerobically reached 79.45% and 58.91% aerobically, obtained at a flow rate of 11.11 ml/minute on the 53rd and 45th days. The increase in the BOD/COD effluent ratio from 0.22 to 0.47 during treatment indicated a decrease in biologically degradable compounds and an increase in the effectiveness of local microorganisms in reducing organic matter. Therefore, in this study, we successfully designed a biofiltration system derived from local microorganisms to effectively remove pollutants from wastewater, particularly in the cracker industry.
Analysis of Pore Water Pressure and Seepage During The Impounding Stage of Randugunting Dam Fatimah, Illya Nur; Hidajat, Wahju Krisna; Santi, Narulita
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 22, No 3 (2025): November 2025
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v22i3.881-892

Abstract

Piping induced by seepage poses a significant risk to the stability of Randugunting Dam, located in Blora Regency, Central Java. This study aims to assess the geological and engineering geological conditions of the study area and to analyze the behavior of pore water pressure and seepage during the impounding stage. The methodology includes geological and engineering geological mapping, as well as field monitoring using instruments such as vibrating wire piezometers, v-notch, and observation wells. These field results were then compared with Finite Element Method (FEM) analysis conducted in GeoStudio SEEP/W 2018. The pore water pressure values derived from FEM analysis were generally higher than the actual values recorded by the piezometers. Groundwater levels observed in the wells showed a strong correlation with rainfall intensity. The actual seepage discharge measured at the v-notch was 0.000118 m3/sec, whereas the FEM analysis yielded a significantly higher discharge of 0.01271 m3/sec. Despite this, the measured discharge remains within safe limits, being less than 0.016 m³/s (2% of inflow) and below 0.14 l/min/m. Nevertheless, the higher discharge indicated by FEM analysis suggests a potential risk of piping that warrants attention.
Mapping the Potential of Organic Waste as a Bioconversion Substrate for Black Soldier Fly Larvae (BSFL) in Surabaya City and Sidoarjo Regency Fitriana, Aulia Rodlia; Bagastyo, Arseto Yekti; Warmadewanthi, IDAA; Hanh, Dang Vu Bich; Ursada, Riang
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 22, No 3 (2025): November 2025
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v22i3.865-880

Abstract

Waste management remains a critical challenge in Indonesia, particularly in urban areas. Bioconversion using Black Soldier Fly Larvae (BSFL) presents a sustainable solution for transforming organic waste into high-value biomass rich in protein and fat. The objective of this study was to investigate the potential utilization of organic waste from markets, bakeries, and rejected products from the food and beverage (F&B) industry (specifically creamer and milk), as BSFL substrates, while mapping the existing bioconversion sites. Data was collected through interviews, observations, and field measurements. Primary data included location details, technical specifications, implementation constraints, and BSFL bioconversion sites. Waste composition was analyzed via Loud Count Analysis during a 4-day sampling period. This research was conducted in Surabaya City and its surroundings. The results indicate that market waste mostly consists of dark green vegetables (26.5%), other vegetables (64.1%), and year-round fruits (53.9%). Furthermore, the daily average rejected bread is 2.6-2.7 kg. Rejected foods and beverages include creamers, liquids, and sweetened condensed milk. The facility processes 16.16 tons/day of substrate potential, producing 44.61 tons fresh larvae and 53.85 tons frass, with profits of IDR 58.1-969.6 million. The findings demonstrate significant potential for utilizing local organic waste as BSFL substrates in the study area.

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