bluuebunny/crossref_metadata_2025_split huggingface dataset:
Utilization of Dredged Mud in Land Reclamation: A Comparison Study of Several Soil Improvement Methods
Authors: Wayan Sengara I , Bratanata Jonathan , Krisnanto Sugeng 
Published: August 2022

Abstract
Utilization of dredged mud in land reclamation will become more applicable in the future due to the increase of the need for space and the rising cost of granular fill materials. Dredged mud mainly consists of soft clay and has very low bearing capacity and high compressibility. Therefore, soil improvement is urgently required. In this paper, the effectiveness of using dredged mud as the fill material in land reclamation was analyzed for a case study of land reclamation. The performance of several soil improvement methods in using such reclamation material was calculated and compared. The soil improvement methods considered in this study were prefabricated vertical drain (PVD) with vacuum preloading, cement mixed dredged mud, and rigid inclusion. The load transfer mechanism in each method was analyzed using analytical and numerical methods. In addition, an elementary cost analysis was performed to compare the cost of the methods based on Indonesian prices. It was found that for the considered case study, cement mixing achieved the highest bearing capacity with the shortest time but with the highest cost. For the same increase in bearing capacity, PVD with vacuum preloading provided the lowest cost. This study provides a preliminary step towards the implementation of effective soil improvement for land reclamation in Indonesia.
Integrated Flood Model in 3D Non-Orthogonal Boundary Fitted Hydrodynamic Model for Ciliwung River, Jakarta
Authors: Muslim A B , Muin M 
Published: August 2022

Abstract
The flood model (MuFlood) had been developed and applied as a flood early warning system in Jakarta, Indonesia. The low land Jakarta faces flood threat because of a significant land-use change in the upstream region, especially in the Katulampa catchment area. Katulampa, Bogor, is located 350 meters above Mean Sea Level (MSL). The distance from Katulampa to Manggarai Gate in Ciliwung River is approximately 91 km. The flood arrival time is about 12 hours. The output of MuFlood is as input for the ocean hydrodynamics model (MuHydro3D) using the 3D Non-Orthogonal Boundary Fitted. The paper presents the integrated model results to simulate flood events from Katulampa and the local catchment area of Jakarta. The comparison between observation and model prediction from the MuFlood hydrodynamic model is excellent for the 21-22 September 2020 case. MuHydro3D predicted that from 21-22 September 2020 case cause the water level increases up to 19 cm on West Flood Canal (KBB), and the closer the bay, the water level will gradually smaller and as same as the tide.
Vessel Size and Dredging Depth Optimization for Tol Laut Program using Genetic Algorithm: Hub Port Case Study
Authors: Sihombing R , Muin M , Tawekal R L 
Published: August 2022

Abstract

Tol Laut is an Indonesian government containerized sea freight program which is aimed at reducing the price disparity, as well as extending logistic distribution from developing regions. The program can be enhanced by determining the optimum dredging depth of port navigation channel and the optimum size of vessel. The required channel depth is affected by the size of vessel, which is represented by its draft, on the respected hub port. The significance of vessel size and dredging depth in accommodating the container demand will be evaluated by considering the physical environmental conditions such as surface water elevation which affected by tidal conditions. Genetic Algorithm is utilized in this study since it showed robust results on optimizing port performances problems that have many dependent variables and solutions. As a hub port within Tol Laut Program, Port of Belawan is selected as a case study due to its strategic location. Several demand scenarios were run using the algorithm, resulting several channel depth-vessel size pairs as the solution. In conclusion, the feasibility of the dredging activity relies significantly on the growth of the demand.
Constructed wetlands with Cyperus alternifolius as a sustainable solution for household greywater treatment
Authors: Qomariyah S , Utomo B , Wahyudi A H 
Published: August 2022

Abstract
Compared to the conventional wastewater treatment plants, constructed wetlands (CWs) are low-cost and affordable green technologies for treating many types of wastewater. This study aimed to evaluate the sustainability of an old-single CW, after four years of operation, and compare its performance with a new-smaller CW, using Cyperus alternifolius plant and applying Hydraulic Retention Time (HRT) for one day. Two artificial wetlands, namely CW-B and CW-S, were used with dimensions (length x width x height) of 170 x 70 x 70cm and 71 x 42.5 x 52.5cm, respectively. The first operation of the CW-B was in September 2015 and the CW-S was in April 2019. Several concentrations of household greywater influent were loaded into the CWs to analyze their performance. Two aeration pipes were installed in the wetland system to increase the oxygen level in the systems. Water quality parameters namely Biological Oxygen Demand (BOD), Total Suspended Solid (TSS), detergent, and Dissolved Oxygen (DO) were laboratory tested before and after treatment. Research carried out during April to October 2019 resulted in the mean removal efficiencies for CW-B and CW-S being 94.13% and 96.84% for BOD; 95.04% and 95.62% for TSS; 97.11% and 94.61% for detergent; and 99.5% and 79.7% for DO increase, respectively. These findings indicate that the removal efficiencies of those parameters in both wetlands were not significantly different. Hence, the system of the old CW-B wetland still keeps a good working process. Referring to the national standards of water quality, the greywater effluents were safely discharged into water bodies and could be used for irrigation needs. A further study needs to be developed to maximize the detergent removal to meet the existing standard for hygiene sanitation. These results suggest that CWs are becoming a sustainable solution for the treatment of greywater at the household level and finally contributing to minimizing the pollution of water.
Influence of random variable on reliability index of braced monopod platform based on fatigue analysis in Madura North Java Sea
Authors: Paramashanti  , Rildova  , Sucipto V N B , Kurniawan A 
Published: August 2022

Abstract
This paper carried out fatigue reliability analysis on braced monopod structure located in Madura North Java Sea to find the most suitable fatigue performance function so better service life prediction of each structure’s components can be done by testing the influence of some load random variable. Fatigue reliability analysis is a local analysis therefore analysis will be conducted only on four critical joints. Reliability analysis is done on several performance function using First Order Reliability Method (FORM). The load random variables which will be tested are yearly fatigue damage, local and global stress analysis, and S-N curve parameter. Randomness of fatigue damage is obtained by running fatigue analysis using only one-year wave data for 59-year SEAFINE wave data. Fatigue damage from analysis will be divided by safety factor and service life to obtain yearly fatigue damage. Reliability index from several performance functions show S-N curve parameter hardly influence the result of reliability analysis. Therefore, fatigue reliability analysis will only include yearly fatigue damage and local and global stress analysis as load random variable. Reliability index with 2 as the value of safety factor and 20 years of service life for four critical joint which are 301L, 303L, 203L, and 201L respectively are 1.24, 1.30, 1.30, and 1.30.
Numerical study of hydrodynamic and sedimentation for sustainable marine floating cage aquaculture in Indonesia: a case study in Situbondo, East Java.
Authors: Sabrina Marsha , Karjadi Entin A. 
Published: August 2022

Abstract
In this study, the floating cage aquaculture in Indonesia, specifically the effect on sedimentation in surrounding areas will be studied. In addition to waves and currents, sedimentation is a considerable environmental concern. This result could help establish additional criteria for 1) selecting suitable aquaculture locations, 2) assessing the effect of aquaculture on the environment, and 3) developing sustainable marine aquaculture industry in Indonesia. This is important because, as an archipelago, Indonesia is expected to play a significant role in providing food supplies from marine aquaculture. The results are from a case study in Situbondo, East Java in which the hydrodynamics and sedimentation are simulated using the Delft3D model with an energy-loss coefficient included in the model to account for floating cages.
The Challenge Of Assisting Stakeholders In Data-Scarce Settings: Characterising Intermittent Water Systems Using A Citizen Science Approach
Authors: Sioné L , Templeton M R , Onof C. 
Published: August 2022

Abstract
The lack of relevant data on the failures of water infrastructure impedes efforts to remediate Intermittent Water Systems, and, by association, improve public health. This paper discusses implementing a citizen science approach that leverages the personal concern of citizens to gain information on the quantity and quality of services provided by IWS - data which would otherwise be intractable, laborious or costly, for developing countries to gather. In the first instance, this paper discusses the development of the citizen science approach and the supporting data-collection tool – a smartphone application. It then ascertains: (i) the feasibility and reproducibility of the method, and (ii) the reliability of the collected data by auto-validating the results using internal consistency tests. Finally, the paper reported on the acceptance of the method as a decision-support tool to develop evidence-based solutions to IWS. This paper demonstrates the first proof of concept that citizen science can be used in conjunction with personal communication technology to bridge the information gaps on the supply of municipal water in data-scarce and resource-constrained settings. It is a feasible and validated data collection method which requires a minimal time and resource investment.
Development of Concrete Material Technology in the context of supply - demand based on geographical aspects
Authors: Pradoto R G K , Soemardi B W , Gazali A , Putri A T , Purba R P , Mahardika I 
Published: August 2022

Abstract
The Indonesian construction industry is one of the leading sectors with significant contributions to economic growth. A current major issue in the industry is to strive for sustainable development focuses on three aspects, social, environmental, and economical. The use of technology, especially concrete material technology, is one of the supporting factors to achieve the goal. Concrete material usage, with cement as the main component, is quite prominent in the industry, supported by Indonesia’s top 12th cement producer globally with a 2,05% contribution of the world’s total cement production. However, the industry performance in each part of Indonesia also needs to be observed, considering that Indonesia has numerous islands. This study aims to evaluate the landscape of technological development of construction material regarding the supply-demand from geographical dimensions. This supply-demand analysis can consider policy strategies to support sustainable development programs. The data used in this study are derived from the production and consumption aspects of concrete material with an economic approach. The study shows the relationship between the development of concrete construction technology in terms of supply and market conditions. In addition, this study discusses the sustainable aspect of concrete material technology in the context of the trend of cement usage.
Redefining Role of Stakeholders in Restoring Hydrological Function and Conservation of Biodiversity of Nipa-Nipa Grand Forest Park, Southeast Sulawesi
Authors: Wahyuni Ira Ryski , Alfian Alfian , Mutmainnah Mutmainnah , Erif La Ode Muhammad , Djafar Fitria Nur Indah 
Published: August 2022

Abstract
The Nipa-Nipa Grand Forest Park is a conservation forest area in Southeast Sulawesi. This park has potency of hydrological function and serves as the lungs of Kendari City. Its existence is currently used by residents for agriculture, clean water sources, settlements, and tourism without proper regulation and supervision. Therefore, it has potentially caused monopoly, unilateral control, and conflicts. In line with that, the lack of awareness and initiative from the community and stakeholders in maintaining the sustainability of the Nipa-Nipa Forest triggers uncontrollable damage. This study aims to restore hydrological function and conservation of the Nipa-Nipa by redefining role of stakeholders involved in its governance by using the Participatory Action Research (PAR). This method’s actions consist of participatory mapping, planning, and agreements. The outputs of this approach were an increase of community participation in Nipa-Nipa management, the improved capacity building of Forest Conservation Farmers Groups (KTPH), the enactment of new regulations of the implementation of the Nipa-Nipa Forest Park, and the ratification of the MoU between the Farmers Group (KTPH) and the Nipa-Nipa Forest Management Unit (UPTD). The results of this study were developing a strategy for a better governance system, involving stakeholders in decision making, developing equal and harmonious government-community relations, and developing land-use planning that meets environmental conservation, and small sustainable business development.
Tsunami Risk Assessment in Business Continuity Planning for Palu Special Economic Zone
Authors: Purnama Muhammad Rizki , Adityawan Mohammad Bagus , Pribadi Krishna Suryanto , Farid Mohammad , Widyaningtias  , Kuntoro Arno Adi 
Published: August 2022

Abstract
On September 28, 2018, an earthquake with a magnitude of 7.4 Mw struck Central Sulawesi, Indonesia and triggered a major tsunami. At least 3475 people lost their lives as reported by the Indonesian National Board for Disaster Management (BNPB), while a large unknown number is still buried under the rubble and presumed dead. This event also damaged the facilities and infrastructure of the Palu City coastal area. Currently, The Government of Palu is developing the Palu Special Economic Zone (PSEZ) in Tawaeli District, Palu, Central Sulawesi to attract investors and spur economic growth in neighbouring areas. Thus, mitigation plans are urgently needed to reduce damage and losses due to the impact of future tsunamis on PSEZ. This study assesses the impact of tsunamis around the Palu Special Economic Zone and its supporting infrastructure. Hypothetical earthquake-induced tsunamis were simulated using Delft3D and DelftDashboard. The fault scenario is developed based on data from PUSGEN. Further parameters were developed with the empirical earthquake source-scaling laws. The model simulates the tsunami generation, propagation, and inundation from the source to the coastal area. A tsunami impact scenario is then developed as a basis for analysing the business impact to the transportation infrastructure and critical utilities serving the PSEZ, as well as to the operation of the industries and businesses within the PSEZ. The lessons learned from this study can assist stakeholders in developing an areawide business continuity plan as a commitment of the stakeholders for implementing areawide business continuity management for the PSEZ, which will improve the economic resilience of the Palu City as well as South Sulawesi region.
Removal of Sulphate and Heavy Metals from Acid Mine Drainage using Permeable Reactive Barrier Technique
Authors: Anungstri Rissa , Petrus Himawan Tri Bayu Murti , Prasetya Agus 
Published: August 2022

AbstractContaining sulphates and heavy metals, acid mine drainage (AMD) should be managed strategically to mitigate and control the migration of the contaminants to the downstream area. Conventional treatment techniques such as using lime to increase pH levels and metal precipitation or using imported material are usually inefficient and unsustainable. The AMD treatment investigated in this study uses the permeable reactive barrier (PRB) technique to enhance bacterial sulphate reduction and metal sulphide precipitation. The AMD treated is seepage water from industrial mining waste rock dump. This study aims to calculate the removal efficiency percentage of reactive materials to reduce contaminants in a batch test. Reactive materials used were organic waste generated locally i.e. domestic sewage sludge (SE), municipal compost (CO), cocopeat (CP), and the inorganic waste material is fly ash (FA) from a coal-firing power plant. A batch test was conducted in 56 days in an anaerobic chamber using nitrogen gas to support an anaerobic environment during subsampling. Mine water used in this test has a low pH level of 3.2, alkalinity (as CaCO3) < 1 mg/L, high sulphate 3280 mg/L, and contains Fe 46 mg/l, Al 54 mg/L, Cu 2.3 mg/L and Zn 3.4 mg/L. The test result at day 56 from using individual reactive material shows increased pH levels to 6.9; 5.6; 3.7; and 11.6 for sewage (SE), compost (CO), cocopeat (CP), and fly ash (FA), respectively. Alkalinity was increased to 1450 mg/L (SE), 323 mg/L (FA), 15 mg/L (CO), 1 mg/L for CP. The highest sulphate removal was measured in 85% from addition of FA. Sulphate removed from organic material reactor were 52% by (SE), 17% by (CO), 20% by (CP). %RE of dissolved metals (Al, Cd, Co, Mn, Ni, Fe, Cu, Zn), from SE reactor was 80%, CO reactor 80%, CP reactor 52%, FA reactor 94%. Oxidation-Reduction Potential (ORP) was measured to determine reducing conditions. ORP were measured at -551 mv, 255 mv, 156 mv, and -113 mv for SE, CO, CP and FA respectively. SE has the potential to remove metals and favour reducing conditions for sulphide precipitation at medium pH levels. Meanwhile, metal precipitation from addition of FA is mainly due to hydroxide precipitation at high pH levels. FA was able to decrease the most sulphate due to ion adsorption.
The Impact of Pavement Distress to Vehicle Maneuver in Bandung City
Authors: Jihanny Jongga , Ayuningtyas Kardina Nawassa Setyo , David Anju , Salsabila Firnandia Zahwa , Kamajaya Murti , Salmadhia Difa 
Published: August 2022

Abstract
Pavement distress can interfere with the vehicle’s maneuver, causing the vehicle to reduce its speed and change lane or do an evasive maneuver to avoid it. These behaviors could impact traffic conflict significantly. This study aims to identify the impact of pavement distress on vehicle maneuver, specifically the speed and evasive maneuver of the vehicle when approaching poor pavement conditions. The results show differences in responding to pavement distress for each type of vehicle. Motorcycles tend to maneuver or change lanes to avoid the poor pavement condition and it may be because of its dimension, while heavy vehicles tend to reduce the speed while confronting the pavement distress. Besides, light vehicles tend to maneuver, reduce their speed, and do a combination of those responses. From this study, we can investigate that it could be dangerous if the vehicle takes an opposite lane while there is a vehicle on the opposite lane. Some vehicles reduce their speed while confronting poor pavement thus they could be more careful on roads, nevertheless, in the rainy season, it could be dangerous, especially when the pothole is covered with rainwater. The improvement of road conditions is vital to enhance travel time and reduce obstacles on road.
Bioprocess of Oil Contaminated Water At Gathering Station Through A Consortium Of Endogenous and Exogenous Bacteria
Authors: Madonna Sandra , Nurperbangsari Dzalika , Sugiana Astrid Meilasari , Zulkifliani  
Published: August 2022

Abstract
Production activities of petroleum have resulted in extensive environmental pollution, due to accidents, leaks, and oil spills during these activities. Gathering Station is one production facility at the oil field that serves as a gathering place for several liquids produced from production wells to measure the production flow rate. Wastewater at the Gathering Station that still contains oil, so before being discharged into water bodies should be treated to match the existing quality standards. One of the promising methods to remove the oil-polluted at gathering stations is the use of bioprocess technology, which is an eco-friendly, cost-effective, and sustainable approach. A laboratory study was carried out on the Bioprocess of wastewater contaminated oil at the gathering through a consortium of endogenous bacteria and Bacillus cereus and Pseudomonas aeruginosa as consortium exogenous bacteria. The major objective of this research is to determine the effectiveness of consortium endogenous bacteria and consortium exogenous bacteria (Bacillus cereus and Pseudomonas aeruginosa) in degrading oil at the gathering station. Bioprocess was done by using 10% (v/v) inoculum consortium of endogenous bacteria and 10% (v/v) inoculum Bacillus cereus and Pseudomonas aeruginosa as exogenous bacteria and using oil spill dispersant (OSD) 0.2% (v/v) in media. Oil concentrations were determined by the gravimetric method (SNI 6989.10-2011). The result showed that the mixture of Bacillus cereus and Pseudomonas aeruginosa as exogenous bacteria and consortium endogenous bacteria in media produced the highest value of efficiency in degradation oil that up to 64.29% during 21 days (from 1062 mg/l to 379.25 mg/l), with a total population 65 x 106 cfu/ml, this indicated a synergistic relationship between Bacillus cereus and Pseudomonas aeruginosa as exogenous bacteria and consortium endogenous bacteria at room temperature (21±1°C), pH range value 8.34-9.68 and Total Dissolved Solids (TDS) range value from 553-167 mg/l.
Thermal deformation behavior and processing maps of nickel-free high nitrogen austenitic Cr18Mn16Mo2.5N0.83Nb0.15 stainless steel
Authors: Liu Xianli , Wang Yu , Yang Nanan , Yang Zhuojuan , Jin Songzhe 
Published: August 2022

Abstract
The nickel-free high nitrogen austenitic Cr18Mn16Mo2.5N0.83Nb0.15 stainless steel was fabricated by electroslag remelting technology. The high-temperature thermal deformation behavior of as-fabricated steel was investigated using Gleeble-1500D type thermal-mechanical simulation testing machine under the condition of the temperature range from 950 °C to 1100 °C and the strain-rate range from 0.01s−1 to 1.0s−1. The constitutive equation containing polynomial of as-fabricated steel was built to describe stress function containing the variable of deformation temperature and strain-rate based on Arrhenius equation. The Q value is 448.915 kJ mol−1 by computing using the experimental data obtained from the thermal deformation tests. The thermal forging temperature should be higher than 1050 °C and the strain-rate below 1s−1 based on the thermal processing maps.
The use of g-C3N4/MOFs(Fe) as a photocatalyst for remediation of pharmaceutics in water
Authors: Nguyen Hoang Phuc , Nguyen Thanh Nhan , Lee Soo Wohn , Hoang Mai Ha 
Published: August 2022

Abstract
Metal-organic framework MIL-101(Fe) was deposited successfully on g-C3N4 templates under solvothermal treatment. The results of XRD, FT-IR, and SEM measurements revealed the growth of MIL-101(Fe) crystals on g-C3N4 to fabricate the g-C3N4/MIL-101(Fe) hybrid. The photocatalytic ability of g-C3N4/MIL-101(Fe) was examined through the photodegradation performance of paracetamol in an aqueous solution under visible light irradiation. Among the samples, 0.5CN-M, standing for 0.5 g of g-C3N4 used for fabrication of g-C3N4/MIL-101(Fe), showed the best photocatalytic ability when degraded about 34% of paracetamol in water. The effective photocatalytic performance of g-C3N4/MIL-101(Fe) than that of MIL-101(Fe) might result from the high surface area of MIL-101(Fe) and the formation of heterojunction layer between this MOF and g-C3N4.