Indonesian Journal of Urban and Environmental Technology
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STUDY OF OPTIMALIZATION SOLID WASTE OF REFUSE DERIVES FUEL (RDF) AT LANDFILL GRIYO MULYO, SIDOARJO DISTRICT
Get PDFSidoarjo Regency in East Java grapples with a waste crisis, producing 1,086 tons/day in 2022, escalating annually due to urbanization. In response, Griyo Mulyo Landfill adopts Refuse Derived Fuel (RDF) technology, transforming waste into pellets for sustainable energy. This comprehensive waste management strategy not only addresses the increasing waste generation but also contributes to sustainable energy production, aligning with environmental and energy efficiency goals for the district. Aims: This study was aimed to assess the potential for waste reduction using Refuse Derived Fuel (RDF) technology in Sidoarjo Regency, East Java. Methodology and results: the focus of this study was on implementing RDF to convert waste into pellets, thereby reducing landfill reliance and transforming waste into a renewable energy source. The study involved analyzing the composition of waste entering the Griyo Mulyo Landfill Sidoarjo, revealing a significant portion of biodegradable, plastic, paper, and other materials. By determining the optimal RDF composition and estimating calorific values, the research aimed to provide insights into effective waste management strategies. Conclusion, significance and impact study: Analyzing the waste composition entering the landfill revealed optimal RDF components, emphasizing the potential for waste reduction and renewable energy production. The proposed inclusion of EM4 bioactivators in biodrying at Griyo Mulyo landfill promises accelerated decomposition, enhancing overall waste management efficiency. Significantly, this research offers practical insights for sustainable waste management in rapidly urbanizing regions, providing policymakers, waste authorities, and environmentalists with valuable strategies to mitigate the environmental impact of increasing urbanization. The potential impact extends to cleaner energy sources and influences waste management policies, fostering eco-friendly practices in Sidoarjo and beyond
EVALUATION OF ENHANCED SOLAR DESALINATION SYSTEM PROTOTYPE
Get PDFSolar desalination technology has been one of the effective solutions to tackle the problem of water scarcity. A number of studies have been conducted at our water research group to determine which variable influences the quantity of distilled water produced by an independent solar desalination unit. Aims: This study was aimed to design and optimize a novel solar desalination unit and field-tested using the best variable from the previous studies. Methodology and results: Variables used from the previous studies were evaluated to obtain the best values for each parameter, those are: glass cover inclination, gap distance between water and glass cover, insulation thickness, water depth, and water mass flow rate. Those best values were then implemented in the optimized basin design, delivery mechanisms, evaporation techniques, and heat isolation methods. The optimized design can generate up to 2,778.2 mL/m2/8hrs of distilled water with an efficiency of 23.35% in preliminary test, and was field tested at Batukaras Beach, where it produced up to 902 mL/m2/8hrs with an efficiency of 13.56%. Conclusion, significance and impact study: Meteorological parameters and environmental conditions are important factors that greatly affect the performance and productivity of the desalination unit. The relative humidity is inversely proportional to the volume of distillate water, where the smaller the value, the greater the amount of distillate water that can be produced, and it has significant impact on the productivity of the prototype. The quality of the distillate water produced still needs improvement on the parameters of pH, turbidity, and total coliform
Cs-137 AND Co-60 CONCENTRATION REMOVAL ON RADIOACTIVE LIQUID WASTE BY ION EXCHANGE AND COAGULATION-FLOCCULATION METHOD
Get PDFRadioactive liquid waste is a hazardous and toxic waste which comes from nuclear research laboratory. This waste may cause explosion when treated with evaporator. Aim: This research was intended to reduce and determine the best removal method of Cs-137 and Co-60 from radioactive liquid waste. Methodology and Result: Methods used in this research are ion exchange and coagulation-flocculation method. In ion exchange method used two types of reactor that is continuous reactor and batch reactor with variables of debit, material type, mesh size and mass of material, while in coagulation-flocculation method used jar test with ferro sulfate coagulant dose variables. Continuous reactor consisting of separating funnel and chromatography column with a diameter of 4 cm and height 60 cm, whereas in batch reactor used jar test stirrer. The application of radioactive liquid waste treatment is done using selected method, with the start condition for Cs-137 of 3 x 10-5 mCi/L and for Co-60 of 4.8 x 10-6 mCi/L. Application of Ion Exchanger with Continuous Reactor Speed 60 mL/10 sec and Coagulation-Flocculation with dose of 100 mmol/L in pH 8 effluent result the value for Cs-137 and Co-60 that undetected or very little, below 10-6 mCi/L. Conclusion, significance and impact study: The conclusion of this study is suitable with the Government Regulation Number 10 of 1997 about nuclear power, the limit of quality standard for Cs-137 and Co-60 is below 10-6 mCi/L. So the appropriate method to treat of Cs-137 and Co-60 are Ion Exchanger with Continuous Reactor Speed 60 mL/10 sec and Coagulation-Flocculation with dose of 100 mmol/L in pH 8
INVESTIGATION OF MECHANICAL CHARACTERISTICS OF LIGHTWEIGHT CONCRETE USING ENVIRONMENTALLY FRIENDLY LIGHTWEIGHT AGGREGATES
Get PDFThis study aims to investigate the mechanical properties of lightweight concrete using lightweight aggregate and analyze the impact of silica fume on enhancing its compressive strength. The main objective of this study was to improve the value of industrial waste by utilizing GGBFS as a substitute for cement. Four alternative compositions have been used to produce samples of lightweight concrete. The coarse aggregate is substituted with 100% lightweight expanded clay aggregate, whereas the fine aggregates are replaced with 100% vermiculite and 100% polystyrene bead waste. A combination of 20% GGBFS and 10% silica fume is employed for cement replacement. The materials used throughout this study consist of aluminum powder and superplasticizer. The workability, compressive strength, tensile strength, and specific gravity of concrete will be determined by testing. The waster curing will be carried out on cylindrical concrete specimens 200 mm in height and 100 mm in diameter. Experimental results showed that the concrete mixture consisting of 80% cement and 20% GGBFS as binders, along with lightweight expanded clay aggregate as coarse aggregate and vermiculite as the fine aggregate, exhibits the highest compressive strength compared to other lightweight concrete mixtures
POLICY FORMULATION FOR ANTICIPATING THE IMPACT OF ACID RAIN ON PADDY PLANTS USING NORMATIVE JURIDICAL ANALYSIS
Get PDFLaw Number 32 of 2009 Article 57, paragraph 4C that one of the preservations of atmosphere functions regulate efforts to protect against acid rain. One of the effects of acid rain is soil damage to plants, such as what happened to paddy plants. In Indonesia, paddy is one of the priority food sources, but every year, it decreases in several regions. Aims: This study aimed at acid rain\u27s anticipated impact on paddy plants in this case study Bandung Regency. Methodology and results: The approach method in this study is a normative juridical approach, using primary data sources obtained through interviews and journal literature. Then, secondary data from legal literature were analyzed descriptively and qualitatively. The study results show that the Bandung Regency Environmental Service has enforced the law. However, violations still occur by industry and society through vehicle emissions, coupled with the increase in population. One of the efforts to formulate policies to anticipate acid rain in paddy plants is to establish sanctions for violators who still pollute the environment, apply catalytic converters to vehicle exhausts that have the potential to remove NOx, carry out measurements at groundwater measurement stations, water quality information systems (manual or real-time). In addition, the irrigation policy for river water flowing on agricultural land with existing laws is being improved. Conclusion, significance, and impact study: Anticipating the impact of acid rain on rice requires various approaches, both technical and non-technical, as well as further analysis from various policy sectors
APPLICATION OF OPEN AIR MODEL (R PACKAGE) TO ANALYZE AIR POLLUTION DATA
Get PDFAir pollution problem is faced by many countries in the world. Ambient air quality studies and monitoring need a long time period of data to cover various atmospheric conditions, which create big data. A tool is needed to make easier and more effective to analyze big data. Aims: This study aims to analyze various application of openair model, which is available in open-source, for analyzing urban air quality data. Methodology and results: Each pollutant and meteorological data were collected through their sampling-analysis methods (active, passive or real-time) from a certain period of time. The data processed and imported in the openair model were presented in comma separated value (csv) format. The input data must consist of date-time, pollutant, and meteorological data. The analysis is done by selecting six functions: theilSen for trend analysis, timeVariation for temporal variations, scatterPlot for linear correlation analysis, timePlot for fluctuation analysis, windRose for wind rose creation, and polarPlot for creating pollution rose. Results from these functions are discussed. Conclusion, significance and impact study: Openair model is capable of analyzing a long time air quality data. Application of openair model is possible to cities in Indonesia that already monitor ambient air quality but have not analyzed the data ye
SIDOARJO VOLCANIC MUD AS PROMISING FENTON CATALYST FOR REMOVAL OF CONGO RED DYE
Get PDFSidoarjo mud is a volcanic mud (VM) that continues erupting in Sidoarjo to this day. The VM has the potential to be used in water treatment technology as a reagent or catalyst due to enormous amount of discharged flow and rich mineral content. Heterogeneous Fenton is one promising process for maximizing the VM potential, however customization is essential to optimize the process. Aim: This study aimed to investigate the catalytic abilities of Sidoarjo VM in Fenton oxidation by several modification approaches, such as calcination (CVM), impregnation-calcination (ICVM), and unmodified (UVM). Methodology and results: Fenton oxidation was carried out in a batch reactor system with the following conditions: initial congo red (CR) concentration= 50 mg/L; VCR=300mL pH=2; agitation speed=300 rpm; catalyst dosage=0.5 g/L; dan H2O2 concentration=485 mg/L. The highest performance results were achieved when the process was combined with adsorption, at 90% (CVM), 55% (ICVM), and 52% (UVM), respectively. Conclusion, significance, and impact study: The Sidoarjo volcanic mud shows high potential as a Fenton catalyst in the UVM modification technique with CVM reveals to be more suitable as an adsorbent
RELEVANCE OF SOCIAL CAPITAL IN KAMPUNG ARRANGEMENT IN KAMPUNG PISANG, MAKASSAR, INDONESIA
Get PDFImproving poor conditions of the kampung in urban areas can be solved without evictions. Eviction is not a good strategy as it will eliminate the uniqueness of kampung characteristics. Aims: This study was aimed to find out the relevance of social capital in kampung arrangement and also to understand the most influential element of the social capital and its role on the arrangement of kampung in Kampung Pisang. Methodology and results: The study investigated the elements of social capital that affect the activities in every phase in kampung arrangement process. This was done through the analysis of data resulted from the questionnaire and interview surveys on the residents of Kampung Pisang. The result showed the most influential element of social capital is the social network in participation variable. Conclusion, significance and impact study: Participation as an element of social capital plays a major role in kampung arrangement in Kampung Pisang, Makassar city in Indonesia. By participation, the relevance of social capital in kampung arrangement is developing people’s knowledge about the environmental quality and using it in the improvement of physical environmental condition. This paper showed that kampung arrangement could be done by using social capital to hinder evictions