Indonesian Journal of Urban and Environmental Technology
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STUDY IN PLUIT RESERVOIR, NORTH JAKARTA AND DETERMINATION OF ORGANIC DEGRADATION
Get PDFAim:This research is aimed to study of organic degradation in Pluit reservoir, that located in the Village Penjaringan, North Jakarta, between 6° 07\u27 28.6" S 106° 48\u27 07.6" E and 6° 06\u27 40.2" S 106° 47\u2751.1"E with a broad area of ± 80 Ha, depth 1-8 meter. Flow systems pluit reservoir is half continuous and water is disposed with 4 units pump with a capacity of 4.5 m3/s which operates 8 hours/day throughout 11 pumps available. From the results of research findings are then compared with quality standards inspection according to the Government Regulation No. 82/2001 Class II for a review of recreation, fisheries and agriculture. Methodology and Result:The 90% of the DO value is ≤ 2 mg/L. The phosphate value obtained overall is not complied to the standard quality (≤ 0.2 mg/L P). In Pluit reservoir is found organic compounds as raw CODwhich was not complied to the standard quality (≤25 mg/L COD) approximately 27.52 mg/L COD - 371.52 mg/L COD. A kinetics test was done in order to determine the decreasing rate of COD in two conditions, where the first aeration to initial DO reached 4.5 mg/L, and the second is without aeration. Conclusion, significance and impact study:The COD degradation towards time is then measured and shows that organic degradation rate towards time without aeration process shows no decreasing, while non-aerated condition shows that the reaction rate following first pseudo reaction is 0.096 hours-1 – 0.133 hours-1 with an average value of 0.1177 hours-1
COMMUNITY DEVELOPMENT STRATEGY THROUGH IDENTIFICATION OF TANGIBLE AND INTANGIBLE ASSETS FOR THE DEVELOPMENT OF BARAN BURING TOURISM KAMPUNG
Get PDFSuburban areas often experience development pressures, with implications for changing green space into built areas, rural cultures into urban ones, and poverty into prosperity. The development of Buring Kampong (suburban settlement) in Malang City into a tourism kampong, in addition to improving the local economy, must also be able to support environmental quality and community independence. This research used the Asset Based Community Development (ABCD) approach in identifying tangible and intangible assets. The data were collected through field observation, focused group discussion, interviews, and secondary data. Tangible aspects include land use, natural and artificial resources, infrastructure, accessibility, machinery and equipment, and local architecture. Meanwhile, intangible assets include intellectual property, potential branding development, goodwill, software/web, formal and informal organization, social and cultural values, and potential customers. The data obtained were presented descriptively and discussed together, as a triangulation process. The results showed the diversity and breadth of tangible and intangible assets of Baran village, and both of these assets can be directly found in the field and during FGDs and interviews. This research is also an effort to strengthen community engagement and public awareness about their assets, and this activity needs to be continuously improved, to have a better level of community engagement, confidence, social participation, branding, and networking
IMPACT OF CONSTRUCTION ACTIVITIES ON RESIDENTS OF CAPE COAST NORTH METROPOLIS, GHANA
Get PDFConstruction projects have caused significant disruption in urban areas. Despite the need to limit the environmental impacts of construction operations, stakeholders often fall short, resulting in negative consequences for nearby residents. Aim: This study aimed to investigate the effects of various construction activities on residents of the UCC and CCTU campuses in the Cape Coast North Metropolis, Ghana. Methodology and Results: Using a stratified and random sample of 100 residential houses from the University of Cape Coast and Cape Coast Technical University, questionnaires were administered to residents in university-owned dormitories, private hostels, and faculty/staff housing. Data were analysed using Excel and IBM SPSS, focusing on modelling the relationship between variables and assessing their influence. The results indicated that construction operations impacted the environment and residents of the Cape Coast North Metropolis. The R and R Square values indicated that construction activities affected residents\u27 responses. Meanwhile, the adjusted R Square accounted for the complexity of the model, with a standard error measuring the average prediction error. The constant term was considered significant, representing the expected value when all predictors were zero. Conclusion, significance, and impact: From initial ground disturbance to eventual decommissioning, construction projects can lead to soil degradation, habitat destruction, and increased carbon emissions. There is a need to prioritise sustainable and resident-friendly construction practices by incorporating responsible construction methods that mitigate the negative impacts on both residents and the environment. Continuous evaluation will enable better management and improvement of construction processes, leading to stakeholder benefits. Policymakers should explore eco-friendly building techniques, considering construction impacts
UTILIZATION OF HIGH-VOLUME FLY ASH AS A SUPPLEMENTARY CEMENTITIOUS MATERIAL IN ENVIRONMENTALLY FRIENDLY CONCRETE
Get PDFInnovations in material technology are expected to reduce the use of commercial cement and replace it with other environmentally friendly materials with the same performance as normal concrete. Aim: This study aim to analyze the mechanical property of High-Volume Fly Ash Concrete (HVFAC) using F class fly ash with different mix percentages. Methodology and Results: The experiment was conducted in laboratory scale. Four variations of test specimens consisted of: 1 variation (F0), which is conventional concrete with 100% Portland cement as control specimen, and three variations of HVFC (F70, F80, and F90), which were made with fly ash content (%) 70, 80, and 90 of total cementitious. Fresh concrete testing to determine workability, while hard concrete testing is done by density and compressive strength tests at the age of 3, 7, and 28 days on specimens that have been treated with the water submerged curing method. Conclusion, significance, and impact of study: All HVFAC specimens fulfill the Self Compacting Concrete (SCC) category. The compressive strength test results at 28 days showed that the addition of fly ash percentage caused a decrease in compressive strength values in all HVFAC variants, but still exceeded the minimum requirements of high and medium quality concrete. All HVFAC variations meet the requirements of ASTM C618-23 based on the evaluation of Strength Activity Index (SAI) values at 7 and 28 days of age. The utilization of 90% fly ash as a cement substitute resulted in an environmentally friendly concrete product based on the concept of cleaner production
IMPLEMENTATION OF TRANSIT ORIENTED DEVELOPMENT (TOD) IN THE JAKARTA SUB-URBAN AREA
Get PDFThe high mobility of sub-urban communities has become the focus of the government to create an effective transportation system by creating a Transit-Oriented Development concept at several stations in sub-urban or supporting cities of DKI Jakarta. Aims: The purpose of this research is to find out whether the Bekasi and Plawad stations which are located in the suburbs are effective for making transit oriented development. Methodology and results: The type of research to be carried out is quantitative and qualitative research, in which the variables in this study will cover the area, the distance between points, the number of trips from each region to the types of transportation modes used by the community. Then, these variables will be analyzed spatially using maps created in the ArcGIS application and compared to be given a score (scoring) in accordance with the provisions of the indicators of the variables that have been determined in this study. Conclusion, significance and impact study: Plawad and Bekasi Stations are considered not feasible to be used as TOD due to inadequate facilities, the train itself is not yet the main transportation and needs to be increased to meet the commuter mobility needs of the people of Bekasi City
H2S EXPOSURE TO WORKERS IN COAL INDUSTRIES (CASE STUDY IN SURALAYA COAL YARD AND EAST KALIMANTAN COAL MINING)
Get PDFAims: This study is aimed to identify the hazards and occupational risk factors of Hydrogen sulfide as one of the most dangerous gas exposures for employees coming from coal, oil and gas companies. Hydrogen sulfide is a toxic colourless gas with a characteristic odor, soluble in various liquids including water. This gas is irritant and asphyrant that can be absorbed through lung into blood. Its inhalation exerts hard damage of respiratory tract. Methodology and Result: The method used is the analysis of questionnaires with logistic regression statistics. The numbers of respondents are 170 people from the employment population who work in coal mining and Pertamina production units. Results obtained from workers\u27 observations and H2S sampling suggest that the most dominant source of H2S exposure hazard comes from the skim tank and DAF areas. The variables associated with shortness of breath was age (P = 0.006). As many as 17.3% of workers did not apply proper work procedures, and 30.58% of workers had experienced work accidents. Conclusion, significance and impact study: H2S are not related to complaints of dizziness or shortness of breath of workers. Specific factors related to occupational safety are long-term exposure of work factors related to complaints of shortness of breath (OR = 2,061), and factors not using PPE associated with dizziness (OR = 3,484
DESIGN OF PLUMBING SYSTEM AT TUNJUNGAN PLAZA APARTMENT, SURABAYA
Get PDFAim: This study of plumbing system plan is aimed at planning a plumbing system that is compatible with clean water, waste water and rain water management at Tunjungan Plaza apartment, Surabaya City, Indonesia according to SNI 8153-2015, and meet 5 aspects of safety, security, simplicity, beauty, and economy. It applies water supply system which commonly used for tall buildings, namely Roof Tank system. Methodology and Result: Plumbing system planning methods are collecting and analyzing fluctuation in water use, planning clean water and recycled water systems by endorsing alternative piping for clean water and recycled water. In addition to water supply, recycled water system that utilizes waste water to be recycled for flushing closets and watering plants also required to be implemented. Average daily water consumption is 268 m3/day for clean water and 44 m3/day for recycled water with the capacity of ground water tank for clean water is 564.54 m3 and recycled water is 62 m3. Conclusion, significance and impact study: Clean water supply system will implement roof tank system and recycled water will reutilize wastewater for flushing on toilet tank and watering the plants. Waste water use separated system between grey water and black water and then distributed to STP to be treated and reused for flushing water closet and watering plants. Rain water goes to infiltration well by gravity through designed 1 well. Total amount of investment of plumbing equipment is Rp 2,157,697,501,- with cost of water supply per unit Rp 4,445,643,- meanwhile waste water piping cost per units is Rp 1,070,711,-