Jurnal Sains & Teknologi Lingkungan

Pengolahan Air Embung Alam Tampungan Hujan Morowudi dengan Kombinasi Pretreatment Geotekstil dan Teknologi Filtrasi

2025-07-17T01:39:54+00:00

There has been an exceedance of water quality standards in the Morowudi Village reservoir. Therefore, treatment using a combination of geotextile pretreatment and filtration is required. The objective of this study is to determine the reduction in turbidity, color, and total coliform concentrations in the Morowudi reservoir water and to identify the most optimal efficiency of each variation in reducing turbidity, color, and total coliform concentrations. The turbidity, color, and total coliform concentrations of Morowudi reservoir water were 84.9 NTU, 251 TCU, and 730,000 CFU/100 mL, respectively. This laboratory-scale study used geotextile pretreatment as the initial filter, followed by filtration. The geotextile pretreatment reactor is a cylindrical tube with dimensions of 40 cm x 50 cm. Treatment is conducted in stages from the geotextile pretreatment reactor to filtration. The filtration reactor has a length of 10 cm, width of 10 cm, and height of 90 cm. In the filtration reactor, variations in the height of silica sand, zeolite, and activated carbon media are tested. In variation 1, the heights of the silica sand, zeolite, and activated carbon media were 30 cm, 20 cm, and 20 cm, respectively. In variation 2, the heights of the silica sand, zeolite, and activated carbon media were 20 cm, 30 cm, and 20 cm, respectively. Based on the research results, in variation 1, the average reduction in turbidity concentration was 19.39 NTU with a reduction percentage of 77.16%, color concentration was 85.40 TCU with a percentage of 65.98%, and total coliform was 2.60%. In variation 2, the average reduction in turbidity concentration was 25.08 NTU with a percentage of 70.46%, color concentration was 98.55 TCU with a percentage of 60.74%, and total coliforms were 633,000 CFU/100 mL with a percentage of 13.29%. The treatment results in this study did not meet the hygiene and sanitation water quality standards.

Analisis Debit Limpasan pada Perencanaan Sistem Drainase Berwawasan Lingkungan di Kecamatan Pasirjambu dan Kecamatan Ciwidey, Kabupaten Bandung

2021-12-17T12:09:55+00:00

Ecodrainage planning in Pasirjambu District, Ciwidey District. In 2017 the district experienced a fairly high rain intensity and there was a change in the function of the forest area in the upstream area, so that the Ciwidey Sub-watershed experienced an overflow. To overcome this problem, an environmentally friendly drainage is planned by adding complementary structures, namely a reservoir pool as a flow barrier. The available surface runoff discharge is 11.68 m³/s at outlet S.8. The discharge will be reduced by 8 m³/s into the reservoir with a storage volume of 2,208 m3. Meanwhile, another reservoir originating from the Ciwidey River with a discharge of 21.007 m³/s requires a storage volume of 210.07 m³. The water stored in the embung will be used for irrigation purposes, so that this reservoir can reduce areas prone to flooding and prone to inundation but can also increase rice production as a livelihood for the community.

Pemodelan Sistem Dinamis Pengelolaan Sampah Peserta Kelas Belajar Zero Waste melalui Prinsip 3AH (Cegah, Pilah, dan Olah)

2025-11-18T08:40:14+00:00

The waste management problem in Indonesia continues to escalate alongside population growth and urbanization, with waste generation reaching 68 million tons annually, including 15% plastic waste that is difficult to decompose. This study aims to analyze community-based waste management through a system dynamics modeling approach applied to participants of the Zero Waste Learning Class (BZW), which adopts the 3AH principles (Prevent, Sort, Process). Using Causal Loop Diagram (CLD) and Stock and Flow Diagram (SFD), this study maps the interactions between variables such as the number of participants, environmental literacy, waste generation, and the effectiveness of prevention, sorting, and processing activities. Data was collected through surveys of 492 BZW alumni and secondary data on waste management. Simulations were performed using Powersim Studio 10 software, with model validation conducted using the Absolute Mean Error (AME) method, yielding an error rate of 2%, indicating a valid model. This study examines four policy scenarios: Business as Usual (BAU), improved environmental literacy, enhanced waste prevention, and optimized waste processing. The simulation results show that the optimal scenario is increasing the capacity for organic and inorganic waste processing, which successfully reduced residual waste to -56.87 tons by 2030. Furthermore, the amount of sorted waste reached 100% of the generated waste. This study concludes that the system dynamics modeling approach is effective in supporting strategic decision-making for community-based waste management and provides recommendations to enhance environmental literacy and waste processing efficiency to achieve sustainability.