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Municipal solid waste or MSW has potency to be decomposed by microorganisms and trasformed into compost. The waste contains 60%-75% of organic materials C, H, O, and N. The aim of this research was to develop a simulation model based on mathematical equations describing the phenomenon of the composting. The population of microorganisms , the rate of O2 consumption , the rate of CO2 production , the rate of H2O production, the rate of carbon nitrogen ratio or C/N, and temperature were the v Yohanes Setiyo; Hadi K. Purwadaria; Arief Sabdo Yuwono; M. Ahkam Subroto
Forum Pasca Sarjana Vol. 30 No. 1 (2007): Forum Pascasarjana
Publisher : Forum Pasca Sarjana

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Municipal solid waste or MSW has potency to be decomposed by microorganisms and trasformed into compost. The waste contains 60%-75% of organic materials C, H, O, and N. The aim of this research was to develop a simulation model based on mathematical equations describing the phenomenon of the composting. The population of microorganisms , the rate of O2 consumption , the rate of CO2 production , the rate of H2O production, the rate of carbon nitrogen ratio or C/N, and temperature were the variables tested in this research. Validation was carried out by comparing datum of simulation model with datum of composting. Simulation model was declared valid if the values of each parameter were r2 > 0.75, the total value of Err was closed to zero, and the distribution of Err was independent to time. The sensitivity test was analyzed by comparing the value changes of variable tied with the value changes of free variable. Correction from the simulation model in predicting the microorganism population, CO2, O2, and temperature could be expressed respectively as y’ = 1.06(y-1.003), y’ = 1.07(y+ 0.07), y’ = 1.02(y+ 0.05), and y’ = 1.02(y - 1.05). The temperature, the C/N and the rate of O2 consumption were sensitive to the changes of microorganism population and the radius of the bioreactor. Key words: composting, organic materials, simulation, bioreactor

Reconstruction of The Inner Baduy’s Ecohouse Structure in Banten Province Meiske Widyarti; Budi Indra Setiawan; Hadi Susilo Arifin; Arief Sabdo Yuwono
Forum Pasca Sarjana Vol. 35 No. 1 (2012): Forum Pascasarjana
Publisher : Forum Pasca Sarjana

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Environment quality has been worsening year by year; and building’s sector contributes 66% of fossil fuels pollution’s sources. The technique in building constructions needs to changing in order to increase environmental friendly manner. Indigenous people, such as the Inner Baduy community, from longstanding experience have developed systems as their local wisdoms adapting to its environment and houses in a sustainable manner. The objective of this study is to emphasize the importance of traditional knowledge in terms of providing low input energy buildings and settlement. A reconstruction of the Inner Baduy house has been drawn as a documentation of an Indonesian traditional house building in a tropical humid climate. The reconstruction is presented in a form of a technical drawings such as plan, view and section drawing by using SkecthUp computer program. Baduy local wisdom of community is significant in houseing structure development process. Indications by all the structure materials is taken from local sources such as rumbia roof and bamboo’s wall are taken from leuweung lembur and bantaran sungai. Development system’s local wisdom also very economic and efficient using pre-fabrication system. Key words: ecological design, environmental friendly, traditional building, sustainable construction

IMPLEMENTASI KONSEP “ZERO WASTE PRODUCTION MANAGEMENT” BIDANG PERTANIAN: PENGOMPOSAN JERAMI PADI ORGANIK DAN PEMANFAATANNYA Arief Sabdo Yuwono
Bumi Lestari Journal of Environment Vol 13 No 2 (2013)
Publisher : Environmental Research Center (PPLH) of Udayana University

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AbstractThe huge amount of rice straw as by-product of rice production system and the potential useof it as raw material of compost production for organic rice cultivation was the backgroundof this research. Here, rice straw was concerned as raw material to produce compost insteadof as waste from rice cultivation. The objectives of the research were to implement theconcept of “Zero waste production management” in agriculture by composting rice strawgenerated from an experimental field; to develop an input-output (waste-compost) massbalance in organic rice cultivation system; and, to apply the resulted compost on the ricefield. Materials necessary for the research covered an experimental organic rice field locatedin Bogor Municipality, rice seed, rice straw and goat manure. The rice field obtained organicfertilizer merely from compost without any synthetic fertilizer. The produced rice straw andgoat manure were composted by natural static pile method. The result of the researchindicated that waste-compost mass balance based on one hectare rice field showed that theproduced straw was ± 14.1 ton and the resulted compost was around 11.3 ton. It is merely 7ton from the produced compost necessary to apply in one hectare of rice field according toThe Ministry of Agriculture recommendation. It can be concluded that if the entire ricestraw produced from one hectare of rice field was composted, then the rice field could becompost self sufficient and even the rest of 4.3 ton could be utilized for other purposes.

Rice fields are considered to be among the highest sources of atmospheric methane, an important source of global warming. In order to meet the projected rice needs of the increasing world population, it is estimated that the annual world's rough rice production must increase to 760 million tons (a 65% increase) in the next 30 years. This will increase methane emissions from rice fields if current technologies are kept (Minami and Neue, 1993). Indonesia, a country of which rice is one of its Arief Sabdo Yuwono
Jurnal Keteknikan Pertanian Vol. 12 No. 2 (1998): Buletin Ketenikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.012.2.%p

Rice fields are considered to be among the highest sources of atmospheric methane, an important source of global warming. In order to meet the projected rice needs of the increasing world population, it is estimated that the annual world's rough rice production must increase to 760 million tons (a 65% increase) in the next 30 years. This will increase methane emissions from rice fields if current technologies are kept (Minami and Neue, 1993). Indonesia, a country of which rice is one of its staple foods, produces 43.2 M tons of rice per year (Indonesia's Central Bureau of Statistics, 1992). It is produced from wetland paddy of 9.2 M ha and 1.2 M ha dry land paddy.

KUANTIFIKASI BAU DAN POLUSI BAU DI INDONESIA Arief Sabdo Yuwono
Purifikasi Vol 9 No 2 (2008): Jurnal Purifikasi
Publisher : Department of Environmental Engineering-Faculty of Civil, Environmental and Geo Engineering. Institut Teknologi Sepuluh Nopember, Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25983806.v9.i2.155

Odour is concerned as one of the important environmental nuisance forms in Indonesia. Its presence can be detected by means of human olfactory systems. The term of “odour” contains at least two meanings, i.e. firstly as “sense” and secondly refers to a kind of odorous chemical compound. Principally, odour can be quantified in a number of methods such as odorous gas concentration measurement, by olfactometer, by hedonism scale, as well as by indirect measurement using frequency change of a chemical sensor. Odour quantification is useful to solve the polemics on odour pollution in Indonesia. A number of odour pollution cases are originated from industrial and agricultural activities, such as municipal solid waste treatment, crumb rubber production, intensive animal husbandry, wastewater treatment plant and oil refinery. Odour quantification is a tool to solve odour pollution polemics comprehensively by involving certified independent assessor.

RANCANG BANGUN DAN UJI KINERJA HIGH VOLUME AIR SAMPLER UNTUK MENGUKUR TOTAL SUSPENDED PARTICULATE Arief Sabdo Yuwono
Purifikasi Vol 13 No 1 (2012): Jurnal Purifikasi
Publisher : Department of Environmental Engineering-Faculty of Civil, Environmental and Geo Engineering. Institut Teknologi Sepuluh Nopember, Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25983806.v13.i1.228

Total suspended particulate (TSP) is fine particles in ambient air that settles very slowly and is normally measured using High Volume Air Sampler (HVAS). A HVAS should meet several design criteria, such as air flow rate of 1.13 to 1.70 m3/min according to national standard (SNI). This research produced four HVAS units using different types of fan and air vacuum pumps, i.e. centrifugal fan, axial fan, vacuum pumps with the power of 600 Watt and 1000 Watt. During performance test, the highest flow rate in the order of 0,518 m3/min was produced by 1000 Watt vacuum pump HVAS. Comparison test between designed HVAS and the reference HVAS showed that the ambient TSP concentration was 60.3% of those measured by reference HVAS.

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