bluuebunny/crossref_metadata_2025_split huggingface dataset:
Decreasing Iron (Fe) Contaminant from Ground Water for Water Treatment Processed by Dielectric Barrier Discharge Ozone Generator
Authors: Putri R A , Oktiawan W , Syakur A 
Published: April 2020

Abstract
At the end of the decade, we have been entered to the bad condition for water quality. As well as we know that water is a primary demand for everyone. Ozone is a very reactive oxidant, and it can oxidize any parameters in water quality and then that parameters can be reduced. The principal of electrical discharge ozone generator can produce ozone when the compilation of electricity flow through the electrode, after that the discharge electrons will bound with free air which containing O2 so that O3 (ozone is formed). In the research, electrical discharge for ozone generator was made with high voltage variation are 12 kV, 13 kV, 14 kV. Next, ozone concentration that produced by this generator is contacted to the groundwater sample in Semarang which containing 5, 85 mg/litre iron and not yet required by World Health Organization International Standard for drinking water that is 0, 3 mg/litre. The result shows, the highest production ozone concentration by this generator is 33, 41 ppm and can decrease iron contaminant up to 23% from 5, 85 mg/litre to 4, 53 mg/litre. The lowest production ozone concentration is 2, 85 ppm, and can decrease iron contaminant up to 12% from 5, 85 mg/litre to 5, 15 mg/litre.
Strengthening Water Irrigation Management to Increase Water Usage Efficiency
Authors: Hanipah  , Hasibuan H S , Tambunan R P 
Published: April 2020

Abstract
The land-use change from agricultural to the industrial city took place in Karawang. Besides land conversion, transfer in water usage also increased for industrial needs. This is caused by poor water management in terms of distribution and control of water usage, mainly in the industrial and agricultural sectors. The area of irrigated land was reduced from 97, 037 ha (2009) to 90, 062 ha (2017), while the amount of dry land increased from 22, 063 ha (2009) to 46, 299 ha (2017). It showed that the lack of irrigation water management has an impact on the reduction of fertile paddy fields. Therefore, this research aims to formulate an action plan of water irrigation management. The study was conducted in West Telukjambe District, Karawang Regency. The method used stakeholder analysis. Data obtained from observation and interview data, irrigated land area, and the amount of irrigation water availability. The results showed the overlapping and missing roles of several stakeholders in charge of irrigation water management in West Telukjambe. Model simulations showed the increasing of irrigation serving area for additional management performance of each stakeholder. Therefore, the integrated management of irrigation systems needed to control the distribution and water irrigation efficient.
Aluminium Recovery from Water Treatment Sludge as Coagulant by Acidification
Authors: Ruziqna D P , Suwartha N , Moersidik S S , Adityosulindro S 
Published: April 2020

Abstract
Aluminium in water treatment sludge can be recovered as coagulants by acidification method. However, there are some factors that affect efficiency in recovering aluminium, such as stirring speed during acidification, pH, and sludge characteristic. This study aims to find the optimum acidification stirring speed in recovering alum and to evaluate the performance of recovered coagulant compared to a pure coagulant. Aluminium recovery is carried out by adding sulphuric acid until the pH of the sludge reaches 2.5. The acidic sludge is stirred for 30 minutes, with acidification stirring speed is varied from 240–720 rpm, and left for settling until the supernatant is formed. The supernatant was used as a recovered coagulant, examined using a jar test to determine the optimum dose, and compared with the pure coagulant. The results show that the optimum acidification stirring speed was obtained at 540 rpm, where mass balance shows aluminium recovery efficiency of 16.5%. The optimum dose for recovered coagulant was 25 ppm, with a turbidity reduction of 93.38% in jar test. While the optimum dose for pure alum was 20 ppm, with turbidity reduction of 93.26%. Though potentially reduced higher turbidity, the recovered coagulant has slightly lower quality than the pure coagulant, which required a higher optimum dose.
Removal of Physical Contaminants from Potable Water Distribution
Authors: Wicaksono A P , Zaman B , Budihardjo M A 
Published: April 2020

Abstract
Water distribution from water treatment plants may still contain some contaminants such as odour, sediments, discolouration, bacteria, viruses, and worms. This effluent is unhygienic and has potential hazards waterborne disease to human health such as skin disease, itching, influenza, typhus, and diarrhea. These diseases are caused by several contaminant parameters, both physical, chemical, and microbiological. Several methods can be used to treat water such as filtration which can reduce the concentration of contaminants carried or formed in potable water distribution so that it can conform the drinking water quality standards. Filtration has many media types such as activated carbon, greensand manganese, ferolite, polypropylene, yarn, and ceramic. The advantage of activated carbon is low cost, high efficiency, and easy to maintain. Effects of water purification show that the filtration from activated carbon combined with polypropylene filtration processes has significant effects and very effective to reduce physical contaminant. It can reduce 60 – 80 % contaminants, depends on the concentration of the contaminant. This article is a review of some results of the research process.
Value of the Ash Opacity on the Performance of Incinerator as a Result of System Variations
Authors: Muhammad F I , Gita D I , Pertiwi D , Farhah A D , Aulia F R 
Published: April 2020

Abstract
About 15% of the total population of Semarang City does not get any waste management service. The lack of the infrastructure for collecting and processing waste, transportation, and disposal of the waste in the unserved area is believed to be the causes of the problem. As a result, incineration becomes the solution chosen for some people. Unfortunately, incineration has adverse effects. The ash produced by the incineration contains pollutants. To reduce the ash, the pollutant control devices that can be applied to the incinerator are needed. It is also necessary to monitor air quality emissions to find out the ash opacity value of burning material. The modification into two variations was carried out to determine the performance of the incinerator. The first system variation uses the principle of spreading water on the ash produced by the incineration. While the second system variation uses the principle of passing the ash in the submerged water. The composition of the waste burned in the incinerator was 38.115% leaves, 3.458% branches, and 20.475% food scraps. The measurement of the opacity value is done at the inlet and outlet of the incinerator.
IDF Curve Patterns for Flood Control of Air Lakitan river of Musi Rawas Regency
Authors: Syarifudin A , Destania H R 
Published: April 2020

Abstract
The problem of flooding in a Watershed (Basin) or region is caused by natural conditions, such as relatively high rainfall, sloping topographic conditions and tidal influences. Human behaviour is often also the cause of flooding problems, such as the location of settlements that are in the river borders or industries that dump waste directly into river bodies. Besides the problem of flooding can also be caused by a not well-organized river/drainage system or lack of maintenance of an existing river/drainage system. Furthermore, social problems include increasing demands for the availability of new and good residential environmental infrastructure. To overcome the problems as described above, before an activity such as build in a left/right inspection road planning, is need analysis rainfall data and make patterns of Intensity Duration Frequency (IDF) Curve to an analysis of hydraulics in determining flood discharge plans. The results showed that the discharge of river capacity of Air Lakitan river was 482.74 m3/seconds, so the river is unable to hold water flow.
Batik Home Industry Wastewater Treatment Using UVC/Ozon Oxidation Method: Case Study in Cibelok Village, Pemalang, Indonesia
Authors: Larasati D A , Alkian I , Arifan F , Sari S R 
Published: April 2020

AbstractBatik is one of Indonesia’s cultural heritages that spread across various regions with their unique characteristics. One of the regions that have batik industries is Pemalang Regency. However, batik industries also contribute to liquid waste. Wastewater containing pollutants such as waxes, resins, dyes, and binders such as silicates produce high concentrations of Biochemical Oxygen Demand (BOD) and vibrant colors. There are still many batik enterprises that discard wastewater directly to the environment without being processed first. This study aims to degrade Remazol Black B and Biochemical Oxygen Demand (BOD) dyes in batik liquid waste to contact time variations 0, 15, 30, 45, 60 minutes with UVC-Ozone oxidation methods. The Ozone-UVC method is an alternative method for decolorization and degradation of BOD. The dye degradation test was carried out using Spectroquant UV/VIS Spectrophotometer, and the BOD degradation test was carried out using Dissolved Oxygen - DO Meter AZ-8403. The result shows that the BOD degradation at batik wastewater was from 190.17 – 96.83 mg/L. Visually, the increase in treatment time makes the sample look clearer (decolorization), evidenced by the sample image and decreased absorbance results.
Treatment of Leachate using Electrocoagulation Technology; Study case in Jatibarang Landfill-Semarang City
Authors: Oktiawan W , Priyambada I B , Ardhianto R 
Published: April 2020

Abstract
Leachate are dominantly recalcitrant organic pollutants, and thus before its discharge to the environment, leachate must be treated. In this study, electrochemical processes, using aluminum and iron electrode in electrocoagulation, were used to remove non-biodegradable compounds in leachate. The electrocoagulation was conducted as main treatment at flow rate 20 ml/minutes and 40 ml/minutes and constant voltage of 5 volt, and 10 volt. The results showed that aluminum electrocoagulation was effective to remove organic pollutant (measured as COD) 54, 08% (2, 5 g) using 10 volt and flow rate 20 ml/minutes, respectively, while maintaining its initial pH condition at 5, 7-6, 6. Applied voltage 20 ml/minutes using iron electrode provides results 33, 7% (1, 9 g) removal of COD, by using Fe electrode provides increasing pH 6, 0 to 9, 1. This implies that higher voltage and minimum flowrate at aluminum and iron electrode was likely to affect higher COD removal than minimum voltage and higher flowrate. Overall, electrocoagulation processes can be used as alternative method for the removal of recalcitrant organic pollutants of leachate in Jatibarang Landfill, Semarang City.
Retrofit Plans on Building Envelopes as Energy Efficiency Efforts: A Green Building Concept
Authors: Aurora D M , Hasibuan H S 
Published: April 2020

Abstract
Buildings with all their activities use considerable energy in the urban environment. Environmentally friendly buildings concept becomes essential with energy conservation. The application of this concept to existing buildings can be made through retrofit, by carrying out a series of improvements or changes to facilities and elements, to reduce energy consumption. This research was conducted to investigate how much energy savings will be generated through the simulation of several retrofit plans on the building envelope. The model in this study is the public office building, Jakarta Provincial Government’s office. The projects are carried out by simulating the reduction of Window Wall Ratio, the addition of shading, and the replacement of glass material. The analytical method used is energy simulation with sensitivity analysis using the Autocad Greenbuilding Studio application. From the simulation, the results showed that retrofit plans proved to be able to save energy use in the building by 18 - 22%. This simulation also affects the savings in operational costs.
Detail Engineering Design (DED) Domestic Wastewater Distribution and Treatment System in Sampangan, Bendan Ngisor, Petompon, Gajahmungkur District
Authors: Junaidi J , Hardyanti N , Oktiawan W , Rohmah A S , Wulansari R 
Published: April 2020

Abstract
Environmental sanitation is one of the programs in the International Sustainable Development Goals (SDGs) 2030. Semarang Mayor Regulation No. 42 of 2013 on Semarang City Wastewater Masterplan has classified the domestic wastewater management system into two types, off-site and on-site operations. Gajahmungkur district is included in the off-site system. Sampangan, Bendan Ngisor, and Petompon are part of Gajahmungkur district that directly bordered by Kaligarang river. Most residents dispose of greywater into water bodies. This paper aims to present the results of the Detail Engineering Design (DED) domestic wastewater distribution and treatment system. The method of sampling wastewater used SNI 6989: 59: 2008. Based on the results, TSS values 236 mg/L, COD 331 mg/L, and BOD 116 mg/L. This result shows that the domestic wastewater produced is still above the Minister of Environment & Forestry Regulation No. 68 of 2016. The installation of wastewater used for the Gajahmungkur district consists of Grit Chamber, Collecting Wells, Anaerobic Baffled Reactor, Settling Tank, and Chlorination Tank. The type of domestic wastewater distribution system is a shallow sewer. This plan is divided into 11 blocks and serves a population of 20, 097 people. The planned budget for the costs required to make this plan is IDR35.016.315.000, 00.
Holistic Water Management at the Community Level, Case Study Jabung District, Malang Regency, Indonesia
Authors: Ari I R D , Rukmi W , Elya N 
Published: April 2020

Abstract
Access to safe water as a basic infrastructure is still a major problem throughout the world, and it is the main concentration to be solved as stated in SDGs pillars 6 and 9. Availability access to basic needs such as infrastructure of water is also one important homework to deal with for the Indonesian government along with the Universal Access 100-0-100. The research aim is to measure the Water Poverty Index (WPI) through the 5-component to propose a poverty eradication strategy of the water infrastructure at the community level. Jabung District in Malang Regency is chosen as the case study, wherein at about 33, 19% and 16% of households are the receiver of Raskin (Poor Rice) program and Program Keluarga Harapan (Family Hopes Program) – the poverty alleviations programs in Indonesia. Both field observation and depth interviews are conducted towards 548 heads of households at the compiling data. The WPI measurement indicates that 1 of the 15 villages have the low safe value of WPI. Among the fifth component, the environment shows the worst scale of the WPI whereby 14 villages have a value of 49, 16 (unsafe value), so integrated water management strategy by incorporating water balance for both domestic and non-domestic purposes is indispensable.
Identification of Potential Uses of Building Information Modeling (BIM) for Construction Supply Chain Management: Preliminary Studies
Authors: Sholeh M N , Nurdiana A , Setiabudi B , Suharjono  
Published: April 2020

Abstract
The 4.0 industrial revolution in all fields encouraged the construction industry to make technological-based innovations. Building Information Modeling (BIM) is one of the tools in advancing construction technology today. On the other hand, supply chain construction continues to grow and becomes important in project management. This study aims to identify the potential use of BIM in construction supply chain management. Preliminary studies on several projects in Indonesia were carried out as identification methods. The Delphi process was used to obtain the data described in the Strength, Weakness, Opportunity, and Threat (SWOT) analysis. As a result, BIM has the potential to be applied to the construction SCM with several considerations. There are 5 trends in strength, 4 trends in weakness, 5 trends in opportunity, and 3 trends in threat. Trends in strength and opportunity are used as indicators in the analysis of impacts. BIM as advanced technology is the highest indicator and the lowest trust between stakeholders in the application of BIM in the construction supply chain. In addition, harmonization between BIM actors is needed: the Ministry of Public Works, contractors, suppliers and academics in the supply chain.
Design Optimization of Water Distribution Suburban Area in Mranggen, Semarang, Indonesia
Authors: Rezagama A , Handayani D S , Zaman B , Putra R R S 
Published: April 2020

Abstract
Water losses in water distribution systems are one of the problems that occur in water distribution systems. Water losses can be caused by physical losses or leakage. Leakages can be caused by technical and non-technical factors. The existing condition of the water distribution network in subdistrict capital Mranggen, Demak Regency has not been able to drain water continuously for twenty-four hours in Batursari and Kebonbatur Sub-Districts. The optimization of the drinking water distribution network is carried out by evaluating the network system using Epanet software and then doing the rehabilitation design and network development according to future developments. The results of the analysis of the epanet model show that the use of deep well pump systems directly distributed to customers results in inefficiencies from pressure. Access to the safe drinking water needs to be prepared first from the availability of raw water, treatment units to the distribution network. The construction of clean water transmission pipeline system is prepared to go into different zoning from the initial network. Zoning pumping network systems will increase pressure significantly and reduce leakage through control.
Community Movement for Sustainable Use of Natural Resources: Case study of North Kendeng Mountain Area, Central Java, Indonesia
Authors: Hadi S P , Purnaweni H , Prabawani B , Hamdani R S 
Published: April 2020

Abstract
North Kendeng Mountain has abundant limestone potentially utilized for materials of cement, cosmetics, paint, and other commercial products. This area is also a storage for water resources widely used for household and irrigation for local people. The conflict between government and investors on one side preferring this area for utilization for commercial uses and local people supported by influential people and academician choosing it for conservation. Local people pioneered by Sedulur Sikep (Adat or Traditional Community) form a Community Network for Caring North Kendeng Mountain (JMPPK) mobilizing people through cultural events, rally, demonstration, dialog, discussion, and lobby. Sedulur Sikep believes that they must treat the Earth as a mother providing everything for the human being. Human nature must adequately address the Earth. This paper observes the development of conflict over water resources, the way JMPPK defends their right over natural resources. The type of research is descriptive analysis. The data collection techniques include an informal interview, observation, and a literature review. The data is analyzed qualitatively. So far, the interest and aspiration of local people, both expressed through Strategic Environmental Assessment (SEA) studies and their own opinion aired the government, has not incorporated a variety of events at the revision of spatial planning. They are persistent and continue struggling along with their counterparts. It is required a dialog among relevant stakeholders regarding the area for utilization and conservation to create sustainable management.
Mental Model Perspective of Multi-Sector Industrial Symbiosis in Indonesia Based on Waste Exchange Strategy: Introductory Study
Authors: Pradhita O , Azhar H N , Laksana M P , Surbakti N N 
Published: April 2020

Abstract
Indonesia, as a developing country, has a long-term national vision to become a stable industrial country which will achieve in 2035. This commitment showed by an increase in industrial sector contribution to Indonesia’s GDP, which is targeted to reach 30% in 2035 compared to 20.97% contribution to GDP in 2015. The global competition and current trends also become challenges for the Indonesian industry sector, where nowadays, international markets more prefer eco-labeled products than conventional ones. The green industry concept, which prioritizes the efficient use of resources sustainably to improve environmental performance, could be the answer to tackle both problems. Green industry development can be done through the concept of industrial symbiosis by implementing a waste exchange strategy. This strategy is applied by reusing waste as raw material for other industries. This study examines industrial symbiosis potential practices in Indonesia using waste exchange strategies in various industrial sectors through a mental model approach. The mental model structure in this study was built by exploring possible synergies between industries through byproduct similarity. From the psychological model, we uncovered nine waste categories as vital nodes in waste-resource networks. This preliminary study may serve as additional industrial planning guidance for the Indonesian government and other related stakeholders in the green industry development
Quantitative Risk Analysis for Oil and Gas Projects: A Case Study
Authors: Hatmoko J U D , Khasani R R 
Published: April 2020

Abstract
Delays have been identified as one of the significant risks in oil and gas projects. A sound risk analysis is, therefore, one of the critical factors for the success of the projects. The aim of this research was to measure the impact of delay risks on the completion time of an oil and gas project in Indonesia as a case study. Data of relevant delay risks were initially collected from literature reviews and observations on project documents and finalized through interviews with key respondents of the project. A monte-carlo based simulation software was used to simulate 28 delay risks identified and applied to the 34 project activities. This research found a probability of less than 1% for on-time project completion according to the baseline schedule (366 days). It was also projected that the project duration could be extended by 10.6% (405 days) and 14.2% (418 days) with 50% and 80% probabilities, respectively. The sensitivity analysis indicated that the most influential activity on project delays was the tubular delivery, and the risk delay with the most significant impact to project delays was the delay of long-lead item delivery. This research showed the mechanism of incorporating delay risks into relevant project activities, and the findings allow a better understanding of stakeholders to develop appropriate risk mitigation strategies.