Leaves on the Diponegoro University campus were sent to the university’s solid waste facility for composting. A modification of the normal composting process was implemented to speed up the process. In this study, the content of cattle rumens and rice bran were added to accelerate the composting process. Three samples with different composition were prepared (sample code: L, L-R, and L-B). Sample L contained leaves only, sample L-R comprised of leaves with rumen content added and sample L-B consisted of leaves with the addition of rice bran. The results indicated that a maximum temperature of 60.2°C was reached in the L-B sample, while the temperature of compost and L-R was about 30°C. The lowest pH was 6.76 found on the L sample, with sample L-B and L-R having pH of 6.7 and 6.9, respectively. The quality of the mature compost of all variation was about the same, but the compost in sample L-B produced the highest C/N ratio of the three composts, about 20% higher.

Tempat Pengolahan Sampah Terpadu Universitas Diponegoro (TPST Undip) merupakan  sarana pengelolaan sampah  mandiri yang dibangun pada tahun 2015 oleh pihak institusi Universitas Diponegoro. TPST Undip melakukan kegiatan pengelolaan sampah mulai dari pengangkutan hingga pengolahan sampah untuk wilayah pelayanan yang mencakup seluruh area yang ada di kampus Undip. Pihak TPST Undip sudah melakukan upaya untuk mengolah timbulan sampah tersebut, yaitu dengan melakukan komposting untuk sampah organik biodegradable dan melakukan recycle untuk sampah anorganik. Pengomposan tersebut dilakukan selama 3 – 5 minggu dengan menggunakan bantuan aktivator EM4. Dalam penelitian ini, akan dibuat bioaktivator berupa larutan mikroorganisme lokal (MOL) dari berbagai macam daun yang mudah didapatkan di lingkungan sekitar kampus, seperti daun ketapang (Terminalia catappa), daun angsana (Pterocarpus indicus) dan daun mahoni (Switenia mahagony). Bioaktivator ini akan menggantikan aktivator komersial EM4 untuk digunakan dalam pengomposan sampah daun kering. Proses pengomposan dilakukan secara aerobik dengan bak bersekat dan dilakukan selama 28 hari. Hasilnya kandungan unsur hara makro yaitu COrganik, N-Total, dan K-Total dalam kompos ini telah memenuhi standar kualitas kompos di Indonesia yang diatur dalam SNI 19-7030-2004

Penerapan sistem drainase konvensional di daerah padat penduduk dapat mengakibatkan genangan banjir hulu atau hilir. Tujuan dari proyek ini adalah untuk menentukan curah hujan, kapasitas sistem drainase yang ada, sistem drainase dan perencanaan lingkungan (Eco-drainase) di wilayah studi. Perencanaan dimulai dari evaluasi saluran drainase yang ada di wilayah studi melalui analisis curah hujan dengan metode Log Person III di mana data curah hujan diperoleh dari Meteorologi, Klimatologi dan Geofisika (BMKG) Prov. Jawa Tengah, dan Departemen Manajemen Sumber Daya Air (PSDA) Prov. Jawa Tengah, kemudian merencanakan sistem Ecodrainage dengan menerapkan bangunan infiltrasi air hujan yang dapat diterapkan di daerah studi, serta membandingkan dengan sistem drainase yang ada, terutama pada kapasitas drainase dan debit, debit diserap dengan baik, serta sisanya dari debit air overflow ke saluran drainase. Dari perencanaan yang dilakukan menunjukkan bahwa setelah menerapkan Ecodrainage, banyak saluran yang awalnya tidak bertemu untuk menampung semua limpasan air, memenuhi. Dengan membandingkan debit ke sistem drainase yang ada: limpasan air ke saluran: 8.64 3m 3 /dt dan tidak ada debit air yang diserap, sedangkan untuk Ecodrainage, debit limpasan air hujan: 8.64 3m 3 /dt, aliran air diserap 4.419 m 3 /dt, dan buang sisanya masuk ke saluran: 4.224 m 3 /s.

Composting Process is alternative organic waste management for degradation waste generation. In general, bio activator will be added to the organic waste mixture which aims to accelerate the process of maturing compost and not forgetting the quality standards of it in order to apply to the soil so that the environment will stay in a healthy condition. Various types of bio activators used in the composting process such as EM-4, Acticomp, Orgadec, and also bacteria which can be produced using various source organic matters such as vegetable waste. Vegetable waste is an excellent medium for growing microorganisms, and it can be used as bio activator in the composting process. Another advantage of using this source is that vegetable waste is cheap and easy to find because they usually thrown away and not reused. Some researchers found bacterias like Streptococcus, Leuconostoc, Lactobacillus, and Pediococcus are contained by vegetables that will create lactic acid fermentation. This bacteria has a vital role in changing various sugars in vegetable waste, especially into lactic acid, which, when compost is given to the soil, bacteria will play a role to control the pathogenic organisms. Some studies about bio activator from a vegetable waste relationship have been done related to the compost quality result from the addition of the environmental bioactivation from vegetables. In this article, there will be reviews from various research journals related to the making and application of bio activator from vegetables in the composting process and to find out whether the use of vegetable waste is suitable bio activator for composting process.

Surakarta and Yogyakarta are the emerging cities which now struggle to manage its pollution from transport sector. This study aims to calculate the emission, to describe spatial distribution and to analyze existing co-benefit actions related to land transportation in Surakarta and Yogyakarta in 2015. The main method used for this analysis comes from Ministry of Environment and Forestry. The VKT values were aggregated for Surakarta city and Yogyakarta city and it showed 27.36 km/day, 37.52 km/day and 27.71 km/day for motorcycle, car and truck respectively. At Surakarta city, the emission load from transport sector in 2014 were 449.95 tons/ year (TSP), 5134 ton/ year(NOx), 243 ton/year (SO2), 50,605 ton /year (CO) and 421,594 tons/year (CO2e). Villages of Kemlayan, Timuran and Keprabon showed the highest emission. While in Yogyakarta city in 2014, the burden of TSP was 58,409 tons/year, NOx was 8,058 tons/year, SO2 was 285.37 ton/year, CO was 75,008 tons/year and CO2e by 601,068 tons/year. The village of Pringgokusuman and Sosromeduran showed the highest emission. Several programs were adopted in Yogyakarta city and Surakarta city for mitigating air pollution i.e ITS-ATCS, BRT system, car free day.