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INDONESIA
Jurnal Rekayasa Lingkungan
Published by Badan Pengkajian dan Penerapan Teknologi
ISSN : -     EISSN : -     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Arjuna Subject : -
Articles 9 Documents
 1 
Search results for , issue "Vol. 7 No. 3: Jurnal Rekayasa Lingkungan" : 9 Documents clear
XYLANASE, AN ENVIRONMENTALLY FRIENDLY BLEACHING AGENT FOR PULP AND PAPER: Characterization And Stabilization Study Of Bacillus licheniformis I-5 CRUDE Xylanase Budiasih Wahyuntari., dkk
Jurnal Rekayasa Lingkungan Vol. 7 No. 3: Jurnal Rekayasa Lingkungan
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/jrl.v7i3.1961

Abstract

Isolate I-5 was isolated from Ciseeng hot spring, West Java and was identified as Bacillus licheniformis I-5. The isolate produces extracellular xylanolytic enzymes on Oatspelt containing Luria broth agar medium. Optimal activity of the crude enzyme was  observed at 50ºC and pH 7. The effect of sodium dodecyl sulphate, b-mercaptoethanol and Triton-X100 were observed. Incubating the crude enzyme in 1.5% SDS and 1.5% b-mercaptoethanol at 50oC for 90 minutes then adding Triton-X100 at final concentration of 3.5% for 45 minutes only reduced 5.75% of the initial enzyme activity. SDS/PAGE and zymogram analysis showed that at least two xylanolytic enzymes presence in the crude enzyme. The molecular weight of the enzyme was estimated about 127 and 20kD. The enzyme hydrolysed xylan into xylobiose, xylotriose and other longer xylooligosaccharides. Thermal stability of the crude enzyme was observed at 50, 60, and 70oC and pH 7 and 8. The results showed that the half time of the crude enzyme incubated at 50, 60, and 70oC pH 7 was 2 hours 55 minutes; 2 hours 33 minutes and 1 hour 15 minutes respectively. The half time at 50, 60 and 70oC, pH 8 was 2 hours 48 minutes; 1 hour 22 minutes and 1 hour 9 minutes respectively.keywords: Xilanase, Bacillus licheniformis I-5, thermal stability
FIXED MONITORING SYSTEM FOR MONITORING GAS GENERATED IN WASTE LANDFILL Heru Dwi Wahjono
Jurnal Rekayasa Lingkungan Vol. 7 No. 3: Jurnal Rekayasa Lingkungan
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/jrl.v7i3.1962

Abstract

Gas produced by landfill is bio-gas that has a high concentration of methane that could cause global warming if not controlled. Good management of a landfill in controling the production of methane gas, can be used as an alternative sources of energy to produce electrical energy. Monitoring of methane gas production needs to be done continuously for the energy conversion process can take place perfectly without polluting the environment. Fixed monitoring system described in this paper is the result of design and development including hardware and software of monitoring technology for methane gas to facilitate research in doing observations of a landfill performance.keywords : final disposal, landfill gas, methane, landfill performance, fixed landfill gas monitoring system
FEASIBILITY ANALYSIS OF USING BIOGAS RECOVERY FROM PALM OIL MILL EFFLUENT Subiyanto dkk
Jurnal Rekayasa Lingkungan Vol. 7 No. 3: Jurnal Rekayasa Lingkungan
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/jrl.v7i3.1963

Abstract

The increasing of crude palm oil (CPO) production in Indonesia is followed by the increasing of palm oil mill effluent. Unfortunately, the open system effluent treatment carried out by most of the palm oil mills potentially generates methane gas emission and increases greenhouse gas concentration in the atmosphere. This study proposes of using methane gas recovery for alternatively flaring and generating electricity, and analyze it in the framework of Clean Development Mechanism. Samples of effluent were taken from the three size of palm oil mills (60, 40, and 30 tonnes per hour of empty fresh bunch) in north Sumatra. The results indicate that capturing methane gasfrom the palm oil mill effluent and using the biogas for generating electricity mainly and flaring the rest will reduce carbon emissions as well as generate the additional income for the palm oil mill business.keywords : POME, methane, carbon emission, generating electricity, feasibility analysis of business
EVALUATION OF ENERGY CONSERVATION POLICY IMPLEMENTATION AS ONE OF THE EFFORTS TO REDUCE GLOBAL WARMING Sundari dkk
Jurnal Rekayasa Lingkungan Vol. 7 No. 3: Jurnal Rekayasa Lingkungan
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/jrl.v7i3.1964

Abstract

Energy conservation is the responsibility of national governments, provincialgovernments, district / city governments, employers and society. In this regard, it is conducted in this study is to examine the extent to which local governments implement energy conservation policies applied in office buildings or government owned office buildings. The study results show that there are 3 (three) categories of the efforts made by the agency that became the target sample. The third category is the category minor, moderate and major. Policies, programs and energy saving measures carried out by UGM and PT. PAL is the major categories (innovative). While the energy saving measures undertaken by the agency PUP - ESDM provinces DIY is in the middle category. The results of the energy savings made by the agency that became the target sample benefits budget savings in the payment of electricity bills. Cost Benefit Analysis of results showed that the replacement of some facilities building electric-poweredoffice equipment with energy-efficient appliances provide financial benefits in the form of significant budget savings. The role of leadership commitment will determine the successful implementation of energy saving programs and water. Fossil energy savings will decrease the GHG emissions .keywords : global warming, cost benefit, energy conservation
SOLID-LIQUID FERMENTATION PROCESS FOR SOLID WASTE PALM OIL PROCESSING Siawa Setyahadi., dkk
Jurnal Rekayasa Lingkungan Vol. 7 No. 3: Jurnal Rekayasa Lingkungan
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/jrl.v7i3.1965

Abstract

The main elements contained in solid waste palm-called empty fruit bunches palm oil are 45-50% cellulose, 25-35% hemicellulose and lignin. Empty fruit bunches palm oil are used as compost feedstock in this study have a 56.49% of C-organic content, 0.34% of N-total, and 165.15 of C / N ratio.Solid waste oil palm is increasing in line with the needs of palm oil for household needs. While palm trees need a good fertilization in order to increase oil palm productivity. Traditionally, processing of empty fruit bunches palm oil to be composted,left on open land that will take a long time and vast land in accordance with its production capacity. By using solid-liquid fermentation is expected to occur with a rapid decomposition process with enzymatic hydrolysis and followed by higher temperature at 100 oC or 121oC. The result shows that, within 4 days of decomposition, a pH value between 6-8, the water content 70-80%, C content was decreased from 56% to 53-49%, increasing N-Total value start from 0, 34% to 0.9%, and decreased the C/N ratio from 165 to 58.keywords : empty fruit bunches palm oil, fermentation, compost, solid-liquid
ANALYSIS OF THERMAL DISPERSION IN SELAT SEMBILAN WATERS, NORTH SUMATRA Amiral Aziz
Jurnal Rekayasa Lingkungan Vol. 7 No. 3: Jurnal Rekayasa Lingkungan
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/jrl.v7i3.1967

Abstract

Pangkalan Susu Coal Fire Steam Power Plants (CFSPP) are planned to build in Tanjung Pasir Village, Langkat Regency taking sea water as cooling condenser of power plants, and through it back into the sea. To explore the possibilities of re-entry of the circulation of hot water to the intake, it is necessary to study the termal dispersion within the framework of those plans. In this study, numerical modeling to determine termal distribution pattern that comes out from CFSPP outlet. From the study it could be concluded that with the given intake inlet – discharge outfall design configuration and under the worst scenario, cooling water system of Pangkalan Susu unit 3 & 4 is safe i.e. re-circulation of warmcooling water will not happen. The Pangkalan Susu unit 3 & 4 will consume intact sea water (30.5oC). However, the Pangkalan Susu unit 1 & 2 will be influenced by the warm cooling system that may decrease its cooling system efficiency since its inlet is covered by shattered sea water (31.2oC – 32.2oC).keywords : thermal dispersion, power plant. numerical modeling
PROSPECT OF SEAWEED AS ENVIRONMENTALLY FRIENDLY RAW MATERIALS FOR PAPER INDUSTRY Anny Kustantiny
Jurnal Rekayasa Lingkungan Vol. 7 No. 3: Jurnal Rekayasa Lingkungan
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/jrl.v7i3.1968

Abstract

Seaweed is a commodity which has great potency to be developed and commonly used in food and non-food industry, such as cosmetic and pharmaceutical. Currently, seaweed can also be utilized as raw material for pulp to support an environmental friendly paper industry. Research has been done by scientists from Korea who developed the processing technology of red algae by using extraction and bleaching process. The process is very simple, need less energy and environmental friendly chemical material. Red algae species which is used in this process is Gelidium amansii, which is very suitable for paper industry purposes and can be harvested in around 3 months, therefore this is different with wood pulp. There is a cooperation between Korea and Indonesiain producing Gelidium in Indonesia. This paper presents the assessment of red algae pulp processing technology and examines several matters that should be considered in developing red algae pulp industry in Indonesia. In term of resources, support from the government, universities and research institutions and acceptance of the industry.keywords : seaweed, red algae, extraction, paper, environment
DESIGN AND CONSTRUCTION COMPOSTING PLAN AT BPPT JAKARTA OFFICE Hendra Tjahjono., dkk
Jurnal Rekayasa Lingkungan Vol. 7 No. 3: Jurnal Rekayasa Lingkungan
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/jrl.v7i3.1969

Abstract

Waste, both organic and non organic waste generated much cause problems, such as environmental pollution. In large cities waste product per capita ranges between 600- 830 grams per day (Mungkasa, 2004). On the other hand, the city government more difficult to get a processing Waste (landfill). With the launch of Act No. 18 of 2008 on Waste Management in which one important message of the Act is any source of waste should reduce the amount of waste to be disposed to landfill. The results showed that BPPT office waste generation amounted to 0.0108 kg / peg / day or 0002 kg/org/m2/hr paper component composition 59.94% (almost 60%), office space (80.84%), canteen (10.49%), parks (8.67%) and approximately 28.47% of organic material, (Shochib. R,2010). BPPT, as one source of waste from the commercial sector, has reduced the amount of waste that must be disposed of to landfill by utilizing inorganic garbage that still has economic value, while for organic waste, BPPT trying to reduce the amount of waste by processing organic waste into compost, for it will built home composting, which is one place that used to process organic waste into compost. Home composting is designed for a capacity of 1 m3 per week with the long process of 6 weekskeywords: office waste, composting, home composting
BIOLOGICAL FERTILIZER EFFECT OF HEAVY METAL ABSORPTION OF COPPER AND LEAD TO BABY CORN CROP Sudaryono sudaryono
Jurnal Rekayasa Lingkungan Vol. 7 No. 3: Jurnal Rekayasa Lingkungan
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/jrl.v7i3.1970

Abstract

Absorption of heavy metals by plants is influenced by soil and plant biology. Heavy metals are absorbed into plant tissues through the root, then enter the food chain cycle. Metal will accumulate in body tissues and can have negative impacts for humans, animals, and plants when exceeding the limit of tolerance. Heavy metal accumulation in plant tissues can directly affect plant growth and production, can indirectly affect human health when consuming food contaminated heavy metals. The research objective was to determine the ability of biological fertilizers containing bacteria Azotobacter sp. and Pseudomonas sp., in absorbing heavy metals (Cu and Pb) contained in landfill waste compost, which is used to fertilize crops corn (baby corn). The research methodologyuses a split plot design arranged in Completely Randomized Design with 3 blocks as replicates. The first factor that serves as the main plot of the biological fertilizer, consisting of two cedars, namely: no biological fertilizers and biological fertilizers. The second factor that functions as a sub plot that is a combination of landfill waste compost with NPK fertilizer, consisting of four treatments, namely: Compost waste landfill: no fertilizer NPK = 1: 0; compost waste landfill: NPK = 2/3 : 1/3; compost waste landfill: fertilizer NPK = 1/3: 2/3Without landfill waste compost: NPK = 0: 1. The results showed that administration of biological fertilizers in combination with compost waste landfill is more dominant for increasing and improving soil physical chemistry, such as increasing soil pH, nutrients nitrogen, phosphorus and potassium and cation exchange capacity (KPK). Biological fertilizer containing bacteria Azotobacter sp. and Pseudomonas sp. may reduce the uptake of heavy metals Cu to below the threshold of 2.526 to 15.79 ppm, the maximum content of Cu ranges between 20-100 ppm. The mean content of Pb in tissues and cobs of corn is above the maximum limit of 29.80 to 42.69 ppm, which is still allowed Pb content between 0.1 to 10 ppm. Means baby corn crop is not safe for consumption.key words: compost from the landfill, heavy metals, biological fertilizer

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