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Environmental Remediation Full-Scale Implementation: Back to Simple Microbial Massive Culture Approaches Syakti, Agung; Yani, Mohamad
Makara Journal of Technology Vol 13, No 1 (2009)
Publisher : Directorate of Research and Community Services, Universitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (92.941 KB) | DOI: 10.7454/mst.v13i1.157

Abstract

Using bioaugmentation and biostimulation approach for contaminated soil bioremediation were investigated and implemented on field scale. We combine those approaches by culturing massively the petrophilic indigenous microorganisms from chronically contaminated soil enriched by mixed manure. Through these methods, bioremediation performance revealed promising results in removing the petroleum hydrocarbons comparatively using metabolite by product such as biosurfactant, specific enzymes and other extra-cellular product which are considered as a difficult task and will impact on cost increase.
An overview of technologies suitable for handling Indonesian agricultural soils contaminated with persistent organic pollutants Dwindrata Basuki Aviantara; Mohamad Yani; Nastiti Siswi Indrasti; Gunawan Hadiko
Journal of Degraded and Mining Lands Management Vol 9, No 2 (2022)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2022.092.3415

Abstract

Since Indonesia have signed and ratified Stockholm Convention on Persistent Organic Pollutants (POPs) in 2009, the country must make efforts to manage POPs appropriately. A number of pollution evident of POPs has occurred in Indonesia, either air, soil or water. Agricultural soils are not excluded from POPs pollution as the result of halogenated pesticide uses or other unidentified sources. Contamination of POPs to humans have been detected, as well as indicated potential exposure of POPs to humans. Based-catalyzed decomposition is a method that can be used to decompose or decontaminate POPs. Limestone can be processed to produce calcium-based catalyst that can apply for POPs decomposition. Indonesia is a country rich in limestone natural resources to produce calcium. However, calcium is inferior to sodium or potassium in reactivity for the dehalogenation of POPs. Thus, more evaluation is needed in order for synthesizing proper and economical calcium-based catalyst to alleviate POPs pollution in Indonesia.
PENILAIAN DAUR HIDUP BOTOL PET (POLYETHYLENA TEREPHTALATE) PADA PRODUK MINUMAN LIFE CYCLE ASSESSMENT (LCA) OF PET (POLYETHYLENA TEREPHTALATE) BOTTLES FOR DRINKING PRODUCT Mohamad Yani
Bumi Lestari Journal of Environment Vol 13 No 2 (2013)
Publisher : Environmental Research Center (PPLH) of Udayana University

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Abstract

AbstractThe use of PET packaging in drinking products has increased and shifted glass packaging,so it is necessary to study the life-cycle of PET packaging. This research aims to evaluate lifecycle of PET bottles on tea beverage products. This life-cycle assessment includes productionprocess, inventory, environmental impact, and cost analysis. The life cycle of PET bottle inIndonesia is not complete. The relationship between PET bottle manufacturers, drinkingmanufacturers, and recycling waste, are unidirectional. The recycled waste-PET used forother products. Based on the analysis of inventory, PET bottles 600ml is nedeed 28g resin/bottles and energy. The PET packaging production still produced a high defective product.Environmental impact assessment of PET bottle production indicates that the ambient airquality, noise and waste water are still good. The impact of PET bottle plant produce aglobal warming potential, reduce ozone layer and acid rain. The cost analysis describethat selling price of PET bottles is half the price of a glass bottle, while the price of waste-PET flake is three times higher than cullet. Although PET packaging is considered morepractical, cheap and saving, but the recycling of PET packaging has not been widelyutilized.
Methods and Approaches of Decision Support System for Coconut Agroindustry Development and Down-streaming: A Systematic Literature Review and Future Agenda Wardah, Siti; Wardah, Siti; Marimin, Marimin; Yani, Mohamad; Djatna, Taufik
International Journal of Supply Chain Management Vol 9, No 4 (2020): International Journal of Supply Chain Management (IJSCM)
Publisher : International Journal of Supply Chain Management

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Abstract

Decision support system in development and Down-streaming of coconut-based agroindustry constitutes a meaningful approach for stakeholders in decision making process, in which it is semi-structural process in coconut agroindustry. This current work aimed to identify and analyze a method and approach in development of coconut agroindustry and its downstream, as well as to collaborate and criticize both stages. This work has reviewed 146 scientific articles from 5 main publication databases worldwide published between 2000 – 2018. The identification and classification techniques of this work included multicriteria decision making, financial feasibility study, qualitative and quantitative study, while the methods were generally grouped into decision support system, multicriteria decision making, multi objective decision making, smart system. Currently, methods in decision making system in the area of coconut agroindustry in both downstream and development stage mostly discussed in traditional perspective, without considering spatial intelligent decision support system which enables us to create decision faster. This work successfully built research framework as feed for further model development using smart decision making system covering development and downstream coconut agroindustry with integration of potential area mapping model, product development, and institutional aspect.
ANALISIS KEBERLANJUTAN PENGEMBANGAN PRASARANA TRANSPORTASI PERKOTAAN DI METROPOLITAN MAMMINASATA PROVINSI SULAWESI SELATAN Kusbimanto, Ignatius Wing; Sitorus, Santun R.P.; -, Machfud; Poerwo, I.F. Poernomosidhi; Yani, Mohamad
Jurnal Jalan-Jembatan Vol 30 No 1 (2013)
Publisher : Direktorat Bina Teknik Jalan dan Jembatan

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Abstract

ABSTRAKMetropolitan Mamminasata yang terdiri dari Makassar, Maros, Sungguminasa dan Takalar merupakan salah satu dari delapan Kawasan Metropolitan si Indonesia. Permasalahan prasarana transportasi perkotaan saat ini adalah kemacetan pada waktu jam sibuk, kesemerawutan lalu lintas, tingginya angka kecelakaan, kebisingan dan polusi udara akibat emisi kendaraan bermotor. Pemerintah telah melakukan berbagai upaya untuk mengatasi maslah transportasi namun belum efektif. Tujuan penelitian ini adalah untuk mengevaluasi kondisi eksisting sistem jaringan prasarana transportasi perkotaan dan status berkelanjutannya serta mengidentifikasi faktor-faktor kunci yang berpengaruh dalam rangka menghasilkan arah kebijakan pengembangan prasarana transportasi perkotaan berkelanjutan Metropolitan Mamminasata. ruang lingkup penelitian terbatas pada jaringan jalan nasional. Data primer diperoleh dari survei perhitungan lalu lintas dan wawancara dengan responden secara purposiv sampling. berdasarkan data lalu lintas tahun 2009 volume lalu lintas rata-rata adalah 2.299 smp/jam dan pada tahun 2013 meningkat menjadin 3.520 smp/jam. Nilai derajat kejenuhan mengalami peningkatan dari 0,43 pada tahun 2009 menjadi 0,66 pada tahun 2013. Tingkat Layanan (LOS) kategori C dimana aliran jaringa jalan stabil mendekati tidak stabil dengan volume lalu lintas tinggi. Multi Dimensional Scaling (MDS) digunakan untuk menganalisis empat dimensi yang terdiri dari 59 atribut. MDS menggunakan RAPTransport untuk mendapatkan Indeks Keberlanjutan. Nilai dimensi lingkungan adalah 51,87%, ekonomi dimensi 53,23%, dimensi sosial 49,19%, dan 51,68% dimensi keteknikkan. Status keberlanjutan cukup berkielanjutn yang ditunjukkan dengan nilai indeks keberlanjutan multi dimensi adalah 50,18. MDS, analisis kebutuhan dan ISM digunakan untuk untuk mendapatkan faktor kunci utama. Pemerintah dan pemerintah daerah dalam menetapkan arahan kebijakan dengan melakukan interfensi kebijakan dengan cara meningkatkan faktor-faktor kunci yang sensitif dalam upaya meningkatkan status berkelanjutan. Kata kunci :  prasarana transportasi perkotaan, keberlanjutan, tingkat pelayanan, teknik dan faktor kunci
PENGHILANGAN BAU AMONIAK DARI TEMPAT PENUMPUKAN LEUM PADA INDUSTRI KARET REMAH DENGAN MENGGUNAKAN TEKNIK BIOFILTER Mohamad Yani; . Purwoko; Andes Ismayana; Puji Rahmawati Nurcahyani; Derin Pahlevi
Jurnal Ilmu Pertanian Indonesia Vol. 17 No. 1 (2012): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

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Malodorous gases emitted from natural rubber industries. At crumb rubber plant, leum storage emits high concentration of  ammonia that strength odor and dangerous to healthy workers. This research occurred to remove ammonia from leum storage using biofilter coloum 23L packed with mixed of top-soil, peat-rubber leaves and sludge. The result shows that this biofilters can remove ammonia  from inlet concentration at 4 - 20 ppm to  outlet concentration less than 4,7 ppm (average of 1,1ppm below regulation limit of 2 ppm). The biofilter packed with top soil performs  to ammonia removal efficiency average of 89% and ammonia-removal capacity at 0,36 g-N/kg-dry-material/d. The biofilter packed with mixed of top soil and rubber leaves performs  to ammonia removal efficiency average of 85% and ammonia-removal capacity at 0,60 g-N/kg-dry-material/d. The biofilter packed with mixed of top soil and sludge performs  to ammonia removal efficiency of 99% and ammonia-removal capacity at 0,36 g-N/kg-dry-material/d. The biofilter packed with mixed of top soil and sludge indicated the most stable on ammonia removal capacity and the lowest oulet ammonia at an average of 0.1 ppm.
PENYISIHAN POLUTAN DARI AIR LINDI TEMPAT PEMBUANGAN SAMPAH DENGAN METODE PRESIPITASI STRUVITE: PENGARUH DOSIS PRESIPITAN DAN pH Suprihatin, Mohammad Yani, dan Dewi Ratnasari
Jurnal Teknologi Industri Pertanian Vol. 29 No. 2 (2019): Jurnal Teknologi Industri Pertanian
Publisher : Department of Agroindustrial Technology, Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24961/j.tek.ind.pert.2019.29.2.205

Abstract

Leachate is a waste water formed from the disposed garbage in landfill site. Leachate has a high content of ammonium that can contaminate water. Ammonium removal can be done by struvite precipitation. Struvite precipitation is a process of precipitation by chemical reactions assisted with precipitant chemicals containing Mg2+ and PO43- forming a precipitate of struvite crystals (MgNH4PO4.6H2O). This study aimed to determine the effect of molar ratio and pH on ammonium removal and other important pollutants from leachate. The leachate used for the experiments was taken from landfill Galuga, Bogor Regency that is used for disposal of municipal solid wastes from Bogor City and its surroundings. MgCl2.6H2O and Na2HPO4.2H2O were used as precipitants. The process was conducted in a jar test with stirring speed of 120 rpm for 15 minutes with sedimentation time of 45 minutes. Results showed that this process could reduce ammonium concentration as well as other important pollutant levels, such as COD, TSS, turbidity, and colour. The best ammonium removal efficiency was obtained at molar ratio of 1: 1.3: 1.2 and pH 9 with an ammonium removal of 80.51%. In this condition, removals of 46.67% COD, TSS 96.04%, turbidity 86.1%, and colour of 86.43% were achieved.Keywords: Ammonium, leachate, molar ratio, precipitation, struvite
Isolation, Selection and Identification of Polyaromatic Hydrocarbons (PAHs) Degrading Bacteria from Heavy Oil Waste (HOW)-Contaminated Soil Yani, Mohamad; Charlena, Charlena; Mas?ud, Zainal Alim; Anas, Iswandi; Setiadi, Yadi; Syakti, Agung Dhamar
HAYATI Journal of Biosciences Vol. 27 No. 2 (2020): April 2020
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (415.935 KB) | DOI: 10.4308/hjb.27.2.142

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The heavy oil waste (HOW) containing polyaromatic hydrocarbon (PAHs) is a persistent organic pollutants (POPs) that difficult to degrade. The new PAH degrading consortium was investigated from HOW contaminated soil in North Sumatera of Indonesia. The isolation, selection and identification of polyaromatic hydrocarbon degrading bacteria from soil contaminated by HOW was conducted to solve a bioremediation process. The isolation microbes from soil contaminated by HOW was performed using a minimum ONR7a media and followed on marine agar media for purification purposes. From the performed isolation results, 11 isolates were able to degrade PAHs compounds, such as phenanthrene, dibenzothiophene, or fluorene compounds. They grew at pH range of 4.8-8.2 and performed on emulsification activity in paraffin from 0.150-0.662. Three of them showed the best performance on HOW biodegradation capability and then successfully selected and identified as Salipiger sp., Bacillus altitudinis, and Ochrobactrum anthropi. using 16S rDNA. The HOW biodegradation as TPH-degradation were 38.66%, 59.60%, and 47.16%, respectively. Those isolated bacteria could potentially be as bioremediation agents to develop on bioremediation process for soils contaminated by HOW.
Model Identifikasi Risiko dan Strategi Peningkatan Nilai Tambah pada Rantai Pasok Kelapa Sawit Hidayat, Syarif; ., Marimin; ., Ani; ., Sukardi; Yani, Mohamad
Jurnal Teknik Industri Vol 14, No 2 (2012): DECEMBER 2012
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/jti.14.2.89-96

Abstract

The actors in the palm oil supply chain industry are the farmers, traders, crude palm oil (CPO) factories, frying-oil factories (refineries), distributors and the consumers. The farmers sell fresh fruit bunches (FFB) to the CPO factories through traders. FFB is converted into CPO which is later sold to the refineries. Refineries convert CPO into frying oil which is sold to the consumers through the distributors. There are risks due to product quality consistency, price fluctuation and supply chain continuity. This study has two objectives: (1) to develop a model to identify, evaluate and rank the risks, (2) to develop a model to identify and rank the strategies in improving their added value. Data for this study was obtained through direct interviews and questionnaires. The respondents were selected experts and industry players. The data were processed using Fuzzy Analytic Hierarchy Process (FAHP) models. The first FAHP model showed that the two most important risks were the supply chain continuity and product quality. The second FAHP model showed that the recommended strategies to improve the added values of the actors were the improvement of the infrastructure/cluster development, followed by the usage of superior seeds and cultivation techniques.
PHYSICAL AND CHEMICAL CHARACTERISTICS OF COMPOST, HUSK CHARCOAL AND WOOD CHARCOAL TO AMMONIA GAS ABSORPTION Mohamad Yani; Mia Juliana
Jurnal Teknologi Industri Pertanian Vol. 22 No. 2 (2012): Jurnal Teknologi Industri Pertanian
Publisher : Department of Agroindustrial Technology, Bogor Agricultural University

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Abstract

Ammonia is an odorous gas emitted from many industries and natural activities. The ammonia pollutant was treated by physical and chemical absorptions and biological oxidation (biofiltration). The objective of this research was to determine the physical and chemical characteristics of bokashi compost, husk charcoal, and wood charcoal and their composition by weight (K). This packing materials were analyzed to physical and chemical characteristics, such as moisture content, density, porosity, C/N ratio, water absorption capacity (WAC), and ammonia absorption capacity (AHC). The characteristics of husk charcoal were better than those of wood charcoal and compost. The husk charcoal had moisture content of 7%, density of 136 kg/m3, porosity of 86%, pressures drops of 434 Pa, C/N ratio of 41.60, WAC of 51%, AAC of 1.5x10-3g-N/g-dry-material, its saturated with ammonia for 5 hours and it was needed 30 minutes to detached the ammonia. The composition of packing materials of K122 and K221 were better than that of K212 or K221. The K122 had density of 220 kg/m3, porosity of 78%, pressure drops of 643 Pa, C/N ratio of 35, moisture content of 19%, WAC of 49%, AAC of 4.7x10-3g-N/g-dry-material, saturated with ammonia for 4 hours. The K221 had density of 247 kg/m3, porosity of 77%, pressure drops of 627Pa, C/N ratio of 36, moisture content of 26%, WAC of 17%, AHC of 4.3x1-5g-N/g-dry-material, saturated with ammonia for 6 hours. The physical and chemical characteristics of husk charcoal single or mixed packing materials influenced by the water and ammonia holding capacity. However, compost addition would support the microbial growth in biofilter. Keywords: ammonia absorbtion, compost, husk charcoal, wood charcoal