Food waste can be meat, fish, cooked food scraps, moldy bread, bone scraps, cakes, expired foods, dairy products, fruits and vegetables. Food waste which is put into the trash will decay and produce a foul odor which in turn will invite flies and cause potentially diseases. Most of the food waste that is processed using the composting process needs to spend a relatively long time, which is about 1-3 months or even 6-12 months. This study aims to accelerate composting time through the addition of additive microorganisms in various quantities. Four aerobic composter reactors were utilized in this study. Variations of additive microorganisms added to the research object were 0 in reactor (control), 8 g in B2 reactor, 16 g in B3 reactor, and 32 g in B4 reactor. All reactors were added with dolomite lime. During the composting process temperature, pH, water content and macroelement were tested. The results showed that the mature and stable compost was reached on the seventh day and produced from B2 reactor. In That reactor treated food waste and additive microorganisms with a ratio of 7:3, and 1 g dolomite lime. The level of C/N ratio produced from B2 reactor was 16.71. The value of C/N ratio was better than B3 reactor which produced C/N of 18.37. The control reactor produced a C/N ratio of 21.84 and mature and stable compost was reached on the 14th day. All in all, this study was regarded to be successful in accelerating the degradation of food waste into mature and stable compost in just seven days.

The generation of solid waste around the world creates problems if not properly managed. The method of processing solid waste by burning or landfill is currently not optimal. The availability of land where the final processing (TPA) is critical, looking for a new TPA alternative will be difficult and expensive, especially in big cities. The processing of solid waste using bio drying technology has the potential to produce renewable energy and prevention of climate change. Solid waste processing products can serve as Refuse Derived Fuel (RDF), reduce water content of solid waste, meningkatkan kualitas lindi and increase the amount of recycled solid waste that is not completely separated from home. Biodrying technology is capable of enhancing the partial disintegration and hydrolysis of macromolecule organic compounds (such as C-Organic, cellulose, hemicellulose, lignin, total nitrogen). The application of biodrying has the potential to reduce greenhouse gas emissions such as carbon dioxide (CO2), methane (CH4), and dinitrooksida (N2O). These gases cause global warming.

Kegiatan pengelolaan sampah dapat melepaskan gas rumah kaca (GRK) ke atmosfer dan mengintensifkan iklim global. Pengomposan adalah proses komponen aerobik karbon degradable organik dalam limbah diubah menjadi karbon dioksida. Menggabungkan prakompos dan vermicomposting berpotensi menimbulkan emisi amonia dan gas rumah kaca. Desain percobaan dilakukan dengan memberikan fermentasi kotoran kambing dalam vermicomposting sampah organik dengan jumlah yang berbeda untuk mengetahui pengaruh fermentasi kotoran kambing terhadap emisi gas CO2, CH4, N2O saat kematangan kompos. Desain penelitian ini menggunakan 4 kombinasi yaitu kombinasi pertama 80% sampah organik, 20% kotoran kambing; kombinasi kedua yaitu 80% sampah organik, 20% kotoran kambing, 100 mL Aspergilus niger; kombinasi ketiga yaitu 60% sampah organik, 40% kotoran kambing; dan kombinasi keempat yaitu 60% sampah organik, 40% kotoran kambing, 100 mL Aspergilus niger. Kriteria pengujian yang digunakan adalah pengujian emisi gas CO2, CH4, N2O di akhir kematangan kompos. Dengan adanya penambahan kotoran kambing, semakin banyak kotoran kambing ditambahkan emisi gas CO2, CH4dan NO semakin banyak. Sedangkan dengan ditambahkan Aspergillus niger, proses fermentasi semakin cepat dalam menghasilkan emisi gas CO2, CH4 dan N2O.

COD dalam lindi merupakan salah satu parameter yang secara umum berada pada konsentrasi yang tiggi sebagai salah satu hasil biodegradasi material organik dan anorganik dalam sampah di TPA. Sistem evapotranspirasi yang menggunakan tumbuhan lokal merupakan salah satu sistem yang menjanjikan. Penelitian dilakukan untuk mengetahui efisiensi penyisihan COD dalam lindi dengan reaktor evapotranspirasi secara kontinyu yang menggunakan tumbuhan Tumbuhan Sente (Alocasia macrorrhiza) dan Rumput Belulang (Eleusine indica). Hasil uji menunjukkan efisiensi pada semua reaktor mulai sekitar hari ke 3 hingga hari ke 25 mengalami fluktuasi yang cenderung menurun (dari ± 75% menjadi ± 50%), tetapi hari selanjutnya cenderung meningkat. Pola tersebut dipengaruhi oleh peran media tanam, bakteri dalam media tanam, bakteri pada akar tumbuhan dan aktivitas metabolisme tumbuhan uji. Secara keseluruhan reaktor yang menggunakan Tumbuhan Sente (Alocasia macrorrhiza) lebih fluktuatif dibandingkan denga menggunakan Rumput Belulang (Eleusine indica) yang dipengaruhi pola pertumbuhan dan perkembangannya.

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