Sri Wahyuni
Pakuan University

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Implementation of the 3R Waste Disposal (TPS-3R) program in Tanah Sareal District, Bogor City Yudi Prakasa; Sri Wahyuni; Sata Yoshida Srie Rahayu
Indonesian Journal of Applied Environmental Studies Vol. 6 No. 1 (2025): Indonesian Journal of Applied Environmental Studies
Publisher : Universitas Pakuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33751/injast.v6i1.28

Abstract

Rapid population growth has generated significant environmental challenges, particularly in waste management, which remains a national strategic issue in Indonesia. Waste management is regulated under Law No. 18 of 2008 on Waste Management and strengthened through Presidential Regulation No. 97 of 2017, which outlines the National Policy and Strategy for Household Waste and Similar Waste Management. One approach to reducing household waste is the TPS-3R (Reduce, Reuse, Recycle) program, which emphasizes minimizing waste volumes and improving waste characteristics prior to disposal at final landfill sites (TPA). This study aims to evaluate the performance of the TPS-3R program in Bogor City in terms of its effectiveness in reducing household waste. The evaluation applied the CIPP model (Context, Input, Process, and Product). The findings show that the Context aspect is strong, as the program aligns with national regulations, has a clear legal foundation, and meets the objective of reducing waste at its source through community participation. The Input aspect is adequate but requires improvement: TPS-3R facilities generally meet basic standards; however, human resources are still limited, with managerial and technical roles often carried out concurrently, and maintenance funding remains insufficient. The Process aspect is also rated adequate: available facilities are only utilized at 50–70%, while training and capacity building for TPS-3R managers are conducted more than three times annually. Funding primarily relies on community contributions, government allocations, and revenues from recyclable products. The Product aspect shows partial success: TPS-3R facilities contribute to waste reduction and generate by-products that provide supplementary income, yet overall waste reduction targets outlined in the Regional Waste Management Strategy (Jakstrada) have not been fully met. In conclusion, optimizing both input and process components is crucial to enhance TPS-3R performance and achieve the national target of reducing waste by 30% by 2025.
Enhancing hydroponic vegetable productivity using environmentally friendly cow biourine fertilizer technology as nutrient solution Akbar Choer; Rosadi Rosadi; Sri Wahyuni
Indonesian Journal of Applied Environmental Studies Vol. 6 No. 1 (2025): Indonesian Journal of Applied Environmental Studies
Publisher : Universitas Pakuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33751/injast.v6i1.29

Abstract

The increasing scarcity of arable land and agricultural inputs has encouraged the adoption of innovative cultivation systems such as hydroponics, with vegetables being among the most suitable commodities. Hydroponic cultivation commonly relies on AB Mix as the primary nutrient source; however, the availability of livestock resources, particularly cow urine, presents an opportunity to develop biourine as an environmentally friendly alternative to synthetic fertilizers. This study employed a quantitative experimental approach using a Complete Randomized Factorial Design to examine the effects of different combinations of AB Mix and cow biourine on the growth and productivity of hydroponic vegetables. Treatments consisted of varying concentration ratios of AB Mix and biourine, with evaluation focused on vegetative parameters including plant height, leaf length, leaf width, number of leaves, and post-harvest yield. Results demonstrated that spinach (Amaranthus sp.) and water spinach (Ipomoea aquatica) exhibited optimal growth under treatments dominated by AB Mix, particularly at the P4 ratio (75% AB Mix + 25% biourine), which significantly improved vegetative growth and yield compared to other treatments. Conversely, bok choy (Brassica rapa var. chinensis) responded more favorably to biourine-dominated treatments, with the P5 ratio (25% AB Mix + 75% biourine) producing the best performance across measured parameters. These findings indicate that biourine can partially substitute for AB Mix in hydroponic systems, with crop-specific responses determining the optimal formulation. The study highlights the potential of livestock-derived biourine as an eco-friendly fertilizer alternative, reducing reliance on synthetic inputs and supporting sustainable hydroponic vegetable production.