Animal feed production soared due to the increasing demand for fresh meat and fish. The high cost of animal feed production causes animal feed producers to look for more economical and environmentally friendly alterna...
Animal feed production soared due to the increasing demand for fresh meat and fish. The high cost of animal feed production causes animal feed producers to look for more economical and environmentally friendly alternatives. Microalgae have the potential to add nutrients to animal feed and aquaculture feed because they contain high-value biomolecules. Bioactive compounds containing microalgae such as protein, carbohydrates, polyunsaturated fatty acids (PUFA), vitamins, and other compounds have been shown to improve feed efficiency and the quality of animal products. The contribution of microalgae to meet nutritional needs in animal feed/aquaculture is present in this review. The metabolism of microalgae produced during photosynthetic activity depends on natural conditions such as the location of cultivation, the possibility of contaminants in the culture, and their physiological response to biotic and abiotic factors, such as the availability of light intensity, temperature, pH, nutrients, and growth phase. The quality of microalgae biomass certainly affects the quality of animal feed. From various studies that have been carried out, several parameters can affect the efficiency and quality of animal products, including the amount of microalgae biomass added to the feed, the age of the animal, and the duration of feeding the animal.
Polycaprolactone (PCL) is an important polymer due to its mechanical properties, miscibility with a large range of other polymers and biodegradability. Polycaprolactone (PCL) was chosen as the matrix because of its bi...
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The community is a major component and has an important role in tourism development. The community is required to be able to open up to tourists, and it is to develop themselves with all their potential so that touris...
The community is a major component and has an important role in tourism development. The community is required to be able to open up to tourists, and it is to develop themselves with all their potential so that tourism development can be implemented through the encouragement of good institutional capacity of the community, and ultimately through the development of tourism, the community will feel the benefits as a means of improving their economy and quality of life. Therefore, in the tourism area, smart people are needed who can see and utilize every potential and opportunity. This study aims to describe the strategy of creating smart people in the Tongke-Tongke Mangrove forest tourism area, Kab. Sinjai in supporting tourism development. The research was conducted using qualitative descriptive analysis by strengthening observation, interviews, and documentation studies. The results showed that to create smart people in tourism areas, several strategic steps were needed, namely (1) Community involvement in the formulation of tourism development policies, (2) Development of an internet-based area as a medium for communication in business development (3) Assisting production activities and marketing-supported by the existence of a tourism industrial area, (4) Increasing human resources through the empowerment of potential educational backgrounds as well as development, coaching, and training, (5) Fostering the socio-cultural character of the community as capital in their involvement in tourism development. By using these strategies, a smart community will be created and can support the government in developing tourism as part of regional planning and development.
The air layer between the interior finishes and the structure is used as piping and wiring space. In many cases, ceilings and dry-type double floors are commonly constructed in Japan. However, the effect of ceilings a...
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Plastic waste in Indonesia reaches 64 million tons per year which 3.2 million tons are disposed to the sea. Therefore, a solution is needed to solve plastic waste problem in Indonesia. The objectives of the study is t...
Plastic waste in Indonesia reaches 64 million tons per year which 3.2 million tons are disposed to the sea. Therefore, a solution is needed to solve plastic waste problem in Indonesia. The objectives of the study is to know the effect of using High Density Polyethylene (HDPE) and Low Density Polyethylene (LDPE) waste on characteristics of asphalt concrete AC - WC based on the Marshall Test, compare the characteristics produced based on dry and wet mixing process, and evaluate whether the test results fulfil Bina Marga Specification 2018. By the result of wet process, stability value of 7% HDPE increased up to 38.08% and 8% LDPE content increased up to 22.03% and for the dry process, 9% HDPE and 11% LDPE increase the stability value up to 24.61% and 19.30% respectively. The use of HDPE or LDPE can increase stability of asphalt concrete mixing both in dry and wet process. We can use up to 8.7 ton of plastic waste into 1 km of 7-meter-wide asphalt pavement road.
Wonogiri Dam administratively located in Wonogiri Regency exactly in the upper reaches of Bengawan Solo Watershed. Wonogiri Dam is a multipurpose dam which is used as irrigation, raw water, hydroelectric power plant a...
Wonogiri Dam administratively located in Wonogiri Regency exactly in the upper reaches of Bengawan Solo Watershed. Wonogiri Dam is a multipurpose dam which is used as irrigation, raw water, hydroelectric power plant and flood control. The high impact of erosion and sedimentation became main issue in Wonogiri Dam caused by changes in land use at upstream area. Within 25 years the capacity of Wonogiri Reservoir was reduced by 65 million m3 from 440 million m3 in 1980 to 375 m3 in 2005 as recorded. One of parameter that used for assessment of the dam performance depends on erosion and sedimentation. This study aims to determine assessment of performance Wonogiri Dam in service of water needs due to erosion and sedimentation. Erosion and sedimentation analysis can be determined by using USLE (Universal Soil Loss Equation) and SRD (Sedimen Delivery Ratio) methods. As the result showed that erosion in Wonogiri Watershed has high erosion potential which gain 3,2 million m3/year. The Keduang Sub Watershed shows the highest level of erosion potential, which is between 1.175 million m3/year. The sedimentation rate result in Wonogiri Dam considered relatively high with rate value 1,948,000 m3/year. There for it is necessary that a comprehensive sedimentation management system is needed in the Wonogiri Watershed from both side, in technical and non technical aspect, such as reforestation or dredging activities. Based on the results of the analysis of the impact of erosion and sedimentation, it can be concluded that the performance evaluation of the Wonogiri Dam is include in the sufficient category because many activities have been carried out to restore the reservoir function to its original condition.
The post-earthquake housing reconstruction project is inseparable from being exposed to various risks. Risk is the possibility for an adverse event to occur due to uncertainty. The reconstruction in Pidie Jaya Regency...
The post-earthquake housing reconstruction project is inseparable from being exposed to various risks. Risk is the possibility for an adverse event to occur due to uncertainty. The reconstruction in Pidie Jaya Regency after the 2016 earthquake is still ongoing and uses community-based methods. The purpose of this paper is to identify risks during pre-construction stage in the implementation of community houses reconstruction after the earthquake disaster in Pidie Jaya Regency. Stakeholders who were directly involved in the reconstruction phase were the Management Consultants, Community Group (Pokmas), and the Regional Disaster Management Agency (BPBD) and each had its own potential risks. Data were obtained using 58 respondents from these stakeholders by distributing questionnaires in the research location, namely Pidie Jaya Regency. A total of 29 risk variables were identified, of which there are 8 variables that had high risk. The results of the analysis shown that when viewed from risk factors, the Pokmas formation factor is the most potential risk factor compared to other risk factors because these risk variables are owned by the three groups of respondents with the highest ranking.
During the reign of the Dutch East Indies, the phenomenon of developing architectural designs with a diverse variety of forms filled the developmental history of early modern architecture in Malang City. The offer of ...
During the reign of the Dutch East Indies, the phenomenon of developing architectural designs with a diverse variety of forms filled the developmental history of early modern architecture in Malang City. The offer of various aesthetic elements in the various design included the design of public buildings to meet the increasingly complex activity of city life. The aesthetic element is a visual sign that is closely linked to the context of dynamic society development and contemporary architecture development in a particular place. The study will explore how aesthetic visual signs appear in the central zone of Malang City, with two cases of important public buildings in that location. The method used is a qualitative descriptive analysis method in which the syntagma-paradigm relation analysis model is used to find visual signs in the form of a relationship between the aesthetic elements of the building and the context involved. The results of this study show that aesthetic visual signs have a potential and a hierarchy that contributes to the diversity of designing public architectural designs of the Dutch East Indies period in the new city center zone of Malang.
The acidity of the amalgamation liquid effluent from small-scale gold processing in Pancurendang Village has been detected. Coconut coir and banana stem midribs are part of plants that contain potassium and sodium, as...
The acidity of the amalgamation liquid effluent from small-scale gold processing in Pancurendang Village has been detected. Coconut coir and banana stem midribs are part of plants that contain potassium and sodium, as natural ingredients of alkali source and increase the potential hydrogen (pH). The aims of the research are: 1) determine the characteristic of wastewater from the amalgamation gold processing in Pancurendang Village, 2) analyze the effectiveness of the use of chopped coconut coir from Cocos nucifera and banana stem midrib from Musa sp. to neutralize the acidity of wastewater gold processing from Pancurendang Village, and 3) detect the potential of coconut coir and banana stem midrib to adsorb mercury (Hg). The wastewater from the three gold processing plants was mixed. Parameters tested in the laboratory include pH, TSS, Cu, Cd, Zn, Pb, As, Ni, Cr, CN, and Hg. Results were compared with quality standards. Acid neutralization trials used chopped coconut coir (coco-chips) and banana stem midribs with a dose variation of 50, 100, and 250 grams per 1 liter of wastewater. In addition, a mixture of 50 g of coco-chips and 50 g of banana stem midribs are also used. The pH of the wastewater was measured daily. The laboratory analysis results showed that the pH, TSS, and Hg values did not match the quality standards set by the Minister of Environment Decree No. 202/2004 and Central Java Regional Regulation No. 5/2012. Treatment with 250 grams of banana stem midrib in 1 L of wastewater can increase the pH of amalgamation wastewater from 2.8 to 6 within four days and 6.6 within eight days. Banana stem midrib is more effective in neutralizing acid in gold processing wastewater than coconut coir.
Hydrophobic membranes have limitations, which are the low permeation rate and susceptible to fouling, therefore membrane modifications are generally required. In this paper, hydrophobic polymer membrane modification h...
Hydrophobic membranes have limitations, which are the low permeation rate and susceptible to fouling, therefore membrane modifications are generally required. In this paper, hydrophobic polymer membrane modification has been studied by mixing dragon's blood resin (DBR) as bio additive. Two types of polymers were used, they were polyethersulfon (M-3 PES) and polyvinylidene Two types of polymers were used, they were polyethersulfon (M-3 PES) and polyvinylidene fluoride (M-3 PVDF) with a concentration of 14.5% polymer and 3% DBR. The results showed that M-3 PES had greater porosity, water uptake, pore size, and clean water flux than M3-PVDF. However, the antifouling performance of M-3 PVDF membrane tends to be better than M-3 PES, as well as its rejection. Both membranes tend to be stable even after repeated use.
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