1,720,970 research outputs found
Praktik Pengelolaan Limbah Padat dan B3 (Bahan Berbahaya dan Beracun) di Jakarta,Bogor, Depok Dan Bekasi
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Comparative analysis of Baglog waste management and effect on bok choy (Brassica rapa var. chinensis) plant
Full text linkPurpose: This study was conducted to compare BSF larvae flooding technique and goat manure application for baglog waste bioconversion. The compared parameters were the effectiveness of technique, the quality of compost produced, and the suitability as a growing media and nutrients supplier.
Method: A total of four treatments were applied to assess the bioconversion process and the resulting compost quality. The effectiveness of compost application as a growing media and nutrient supplier for cultivating Bok choy (Brassica rapa var. chinensis) was also evaluated.
Results: The results showed that the highest waste reduction percentage was found in treatment P2 (D = 54.48%; WRI = 2.59%/day). Furthermore, BSF larvae flooding technique was identified as the most effective in reducing the fly population index. Goat manure application in treatment P4 (-0.2) yielded the lowest odor of hedonic scales. The quality of compost produced by all treatments was analyzed, and the results showed conformity with the Indonesian National Standard for N, P, K, and Ca content. Bok choy cultivated using compost treatment P2 had the highest plant height (16.3 ± 1,5 b cm), leaves count (13 ± 2 a leaves), wet weight (187.7 ± 5,8 b g).
Conclusion: BSF larvae flooding technique was more effective in reducing the fly population index and provided a significant reduction in baglog and food waste. On the other hand, goat manure application was more effective in reducing odor levels. Compost produced by treatment P2 showed the best growth parameters for cultivating bok choy.
Research Highlights
• Baglog waste can be effectively reduced through the bioconversion process by using two methods, i.e., BSF larvae flooding technique and goat manure application.
• The bioconversion process produced compost that conformed with SNI 19-7030-2004 regulation for N, P, K, and Ca, except for pH and C/N ratio.
• The BSF larvae flooding technique (used a very large quantity of BSF larvae) tends to be more effective to reduce the fly population index, to accelerate the baglog and also for the bioconversion food waste into compost.
• Utilize BSF larvae and goat manure for enhanced agricultural output and implementing a circular economy.
• Baglog waste is able to absorb the water content of waste to minimize unpleasant odors
DESIGN AND PERFORMANCE TEST OF APPROPRIATE ON-FARM COMPOSTING PACKAGE FOR SMALL FARMERS.
No full textIn Indonesia, the active participation of farmers is fundamental to gain the multiple benefits of organic waste treatment via composting. Currently, small farmer involvement in composting practice has still low because of limited access to appropriate technologies. Minimum supply of appropriate facility increased the probability of ineffective organic waste treatment. The main aim of this research is to create appropriate on-farm composting package for small farmers by adopting NOL (non-odorous and low maintenance) principles in the whole composting process with minimum input of raw materials. The composting package maximizes goat housing with raised slatted floor function to become the major device with composting bin as a complement. The research showed that composting can be done with the minimum input of raw materials and maintenance. Overall, the majority of nutrient content of the composting products complied national quality standard [SNI 19-7030-2004] and decree of agricultural minister [Permentan No. 70/2011] so that it could be applied safely for the agricultural land especially for the horticultural plant. Therefore, this package is highly recommended for small farmers to assist composting practice with effective and efficient ways in developing countries
On the Performance Analysis and Environmental Impact of Concrete with Coal Fly Ash and Bottom Ash
Full text linkCoal is a commonly used fuel by coal power plants that produce coal fly ash and coal bottom ash (coal FABA) as byproducts. The latest regulation in Indonesia changes coal FABA classification to non-toxic waste, which opens up its utilization possibility. This paper analyses the coal FABA potential from Suralaya Coal Power Plant as concrete material and its environmental impact. To determine coal FABA potential, the methods used in this paper are slump test, compressive strength test, flexural strength test, and carbon footprint calculation. This paper shows that concrete mixture with coal FABA content has a lower slump value, lower compressive strength, and generally lower flexural strength. Furthermore, the carbon footprint calculation result shows that concrete mixture with coal FABA content has lower CO2 emissions than conventional concrete. Finally, the result shows that concrete with coal FABA could be used as non-structural concrete
Formulasi Indeks Kenyamanan Udara dalam Ruang pada Tempat Ibadah: Formulation of Indoor Air Comfort Index for Worship Buildings
No full textTwo main functions of public facilities are providing services to residents and maintaining environmental quality. There is currently no index that states the parameters of indoor air comfort quantitatively for worship buildings. The comfort for a building will affect the physical and mental health of its occupants. The research has identified and formulated an indoor air comfort index for worship buildings based on temperature, noise, odour, relative humidity, and light intensity that can be the best recommendations for district/city governments. The research has conducted using qualitative and quantitative methods. The qualitative method is based on filling the questionnaires by respondents and the quantitative method is based on the measurement of five parameters at the research site. The formulation obtained from the results of the weighting of the questionnaire and the index for each parameter. The indoor air comfort index is obtained based on five levels: uncomfortable, less comfortable, quite comfortable, comfortable, and extremely comfortable. The results of the research place of worship gave an index value of 4.0 at Tridharma temple that has declared comfortable, an index value of 2.9 at Church of Immanuel that have declared quite comfortable, and a range of index values of 3.1-3.8 at seven other sites that has declared comfortable
Food Waste Management Utilizing Black Soldier Fly Larvae
Full text linkFood waste is a growing concern in developing countries. This study aims to implement food waste bioconversion by utilizing black solider fly larvae for two eateries' food waste. The bioconversion process used 0.5 g of black solider fly eggs for 14 days in the six bio ponds. After 14 days, the waste, larvae, and compost are separated using sieves to measure the larvae and compost production. The bioconversion process is evaluated based on bioconversion characteristics and black soldier fly larvae and compost produced. Waste Reduction Index, Fresh Matter Consumption Rate, Dry Matter Consumption Rate, Dry Matter Rate, and Efficiency of Conversion of Digested Feed evaluated the bioconversion characteristics for reduction. According to the experimental results, utilizing BSFL is adequate for food waste management, effectively reducing up to 62.6%. Simultaneously, the fresh larvae and compost are produced within a 14-day bioconversion process. The compost meets standards for the nitrogen, C/N ratio, phosphorus, potassium, zinc, and iron content (SNI 19-7030-2004)
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
System development to select environmental odour nuisance panel members
No full textEnvironmental odour is one of the impacts that occur due to changes in air quality. Regulations related to measuring the level of odour with the panel method in Indonesia are still minimal and need further development. The research aims to design a selection system for members of the environmental odour panel. Measurement of the level of odour with the panel method uses hedonism scale instruments as assessment tools. Prospective panel members were recruited with 32 people, consisting of 18 women and 14 men. Gender and age did not significantlt affect the hedonic scale assessment of odour. Panelist selection was conducted by providing 5 odour stimuli using Olfacto-Screen for 3 repetitions in a wind speed of 1 m/sec. The assessment results of each candidate panel member were compared with the results of the NH3 and H2S detector readings. The panellists’ assessment was consistent based on the correlation coefficient between the odour-hedonic scale and the detector, which was R2 > 0.75. There were 5 panel members passing scenarios with consecutive passing percentages, i.e. schema 1 (41%); schema 2 (72%); schema 3 (94%); schema 4 (100%); and schema 5 (100%)
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