Household Waste Management Technology as Compost Using Effective Microorganisms and Shredded Plastic at the Ngawu Asri Waste Treatment Site Gunungkidul Regency Dewi Wahyuningtyas (1*), Suparni Setyowati Rahayu (2), Gatot Santoso (3), Anak Agung Putu Susastriawan (4), Samuel Kristiyana (5), Satriawan Dini Hariyanto (6)
1) Chemical Engineering, Institut Sains & Teknologi AKPRIND, Yogyakarta, Indonesia
*dewi.wahyuningtyas[at]akprind.ac.id
2) Environmental Engineering, Institut Sains & Teknologi AKPRIND, Yogyakarta, Indonesia,
3,5) Electrical Engineering, Institut Sains & Teknologi AKPRIND, Yogyakarta, Indonesia,
4,6) Mechanical Engineering, Institut Sains & Teknologi AKPRIND, Yogyakarta, Indonesia
Abstract
Garbage or household waste is waste that comes from daily activities in the household and does not include feces and specific waste. Most of the composition of wastes at the Ngawu Asri Waste Treatment Site, Gunungkidul Regency comes from organic wastes (food scraps) and inorganic wastes (plastics). The aims of this study are to process organic wastes by using Effective Microorganisms (EM-4) into compost and to process plastic wastes into shredded plastics as plastic recycling materials. The composting methods includes making an organic waste shredder machine, making Effective Microorganisms (EM-4) solution with concentration of 1-2% v/v water, mixing it with organic waste, processing composting, and compost analysis. The methods for shredded plastic includes making a shredder machine, testing it, and results analysis. The compost results obtained were carbon content (C) 24.381%, nitrogen (N) 1.424%, C/N ratio 17.121, black brown color, pH value 6.90 with optimum composting time of 3 weeks. The chopped plastic results obtained were 1-2 cm in size, with capacity of 50 kg/hour, with 10 Hp gasoline engine. This study has impacts for the Ngawu communities. They used compost for their plants growth and sold the production of shredded plastics to the plastic factory in Klaten Regency.
