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All Journal Journal of Research and Technology Agricultural Science
Tatuk Tojibatus Sa’adah
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Engineering Environmental Science Industrial & Manufacturing Engineering

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PENGEMBANGAN TEKNIK PRODUKSI MASSAL BIOMAS ECENG GONDOK Tatuk Tojibatus Sa’adah; Dwi Haryanta
Journal of Research and Technology Vol. 2 No. 2 (2016): JRT Volume 2 No 2 Des 2016
Publisher : 2477 - 6165

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (134.303 KB) | DOI: 10.55732/jrt.v2i2.221

Abstract

Siltation and the presence of water hyacinth plants on a sewer/river is a cause of flooding in urban areas (beaches). Water hyacinth grows fast in rivers, sewer, boezem, lake and or water storage areas, which impedes the water flow and encourages a silting. Rivers dredging or reservoirs of waste water hyacinths just stacked on the edge of river that makes the dirty environment. The research aims to develop a composting technique made from water hyacinth in a mass scale. Factorial experimental treatments (1) Packaging B1: open, B2: plastic bags (glangsing), and B3: buried; and (2) Starter S1: mixture EM4 30%, S2: mixture EM4 20% + urea 1kg/3 liter, and S3: mixture EM4 10% + urea 2 kg/3 liter, so there are nine treatment combinations. Experimental units are water hyacinth biomass as much as one cubic, nine cubic overall. The research results devoted to volume shrinkage, variable temperature, pH, change in smell, colour and biomass texture of water hyacinth during the first two weeks showed a high variation among treatments, but in the fifth week, all of variables were homogeneous relatively and showed almost complete indicators of composting process. Depreciation amounted to 68-78% volume, temperature 26-29oC, pH of 7.0-7.5; texture is brittle, blackish brown color and relatively odorless. C/N biomass ratio at composting mass of water hyacinth from 33-37, and at fifth week the results are varied for the treatment of S1, S2B1, and S3B1 value is still above 20 while the other is below 20, and the lowest at 16.9 S3B3 treatment. Keywords: Composting technology mass, Water hyacinth biomass, Starter, Packaging
Circular Economy Based City Park Management Model in Surabaya Indonesia Dwi Haryanta; Tatuk Tojibatus Sa’adah; Achmadi Susilo; Indarwati
Agricultural Science Vol. 9 No. 1 (2025): September
Publisher : Faculty of Agriculture, Merdeka University Surabaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55173/agriscience.v9i1.181

Abstract

Maintaining a green, clean, beautiful, and lush city park through the year requires sustainable management, which includes maintenance like watering, pruning, trimming, and rejuvenation, as well as the creation of new parks. This study aims to identify the factors that influence the successful management of city parks in Surabaya and to understand the organic material cycle involved in managing these parks. This study used qualitative descriptive method. Data were collected through interviews with park management personnel, documentation from various city government policies, and field observations related to park management activities. Data were analysed using triangulation methods. Trees and city parks need regular care, such as pruning and trimming, to provide optimal benefits. Pruning waste, along with other organic waste, is composted at composting facilities or recycling centers widely available in Surabaya. The cyclical management of organic waste from city parks impacts the growth and development of Surabaya's parks while simultaneously solve the problem of organic waste produced by city communities.Although many studies discuss urban green space and waste management in Surabaya, specific research mapping the biomass cycle and circular economy framework in city park management is still limited. Therefore, this study aims to fill that research gap by exploring how circular economy principles are implemented in the Surabaya city park management system.
Co-Authors Achmadi Susilo Dwi Haryanta Indarwati