scholarly journals A Study on Potential of Rainwater Harvesting System in SJK Chung Hua No. 2, Kuching

2013 ◽  
Vol 4 (2) ◽  
pp. 28-33
Author(s):  
Brenda K.E. Law ◽  
Rosmina A. Bustami
Keyword(s):  
Water Supply ◽  
Rainwater Harvesting ◽  
Rapid Development ◽  
Water Volume ◽  
Water Supply Systems ◽  
Innovative Solutions ◽  
Development Processes ◽  
Alternative Water ◽  
The Cost ◽  
Supply Systems

This study focuses on rainwater harvesting system in a school area in Kuching, Sarawak. Over the years of development processes, there exists quite a number of environmental issues in Malaysia and this is getting serious day by day. Flooding, greenhouse effect, pollution, and global warming are some of the factors that are happening brought about by the rapid development in Malaysia and the whole world today. Presently, the water supply systems have improved but the demand is increasing due to the population growth, and development. To pursue the need for a more sustainable development, rainwater harvesting has been recognized as one of the innovative solutions. This method can be used as an alternative water supply in the future and can reduce the utility bills for water supply among the consumers and potential to be implemented in Malaysia since it has high rainfall intensity. Besides, usage of the collected water volume from rainwater harvesting was direct and without any treatment. The process will include observation of the study area, rainfall data, and collections of data to determine the storage capacity required. From this study, rainwater can fully replace the treated water and the cost of the system is RM 16,699.60. The payback period of the system is 7.12 years with minimum maintenance fees.

Assessment of the potential contribution of alternative water supply systems in two contrasting locations: Lilongwe, Malawi and Sharm El-Sheikh, Egypt

2018 ◽  
Vol 11 (1) ◽  
pp. 130-149 ◽  
Author(s):  
Osman Jussah ◽  
Mohamed O. M. Orabi ◽  
Janez Sušnik ◽  
Françoise Bichai ◽  
Chris Zevenbergen
Keyword(s):  
Water Supply ◽  
System Performance ◽  
Social Preferences ◽  
Water Supply Systems ◽  
Potential Contribution ◽  
Important Conclusion ◽  
Assessment Approach ◽  
Alternative Water ◽  
Alternative Sources ◽  
Supply Systems

Abstract Growing water demand poses a challenge for supply. Poor understanding of alternative sources can hamper plans for addressing water scarcity and supply resilience. The potential of three alternative supply systems in Lilongwe, Malawi and Sharm El-Sheikh, Egypt are compared using a fast, data-light assessment approach. Lilongwe water supply is based on unsustainable use of source water, while Sharm depends primarily on desalination. Both locations experience shortages due to poor system performance and service inequity. Alternative supply systems are shown to potentially contribute to supply augmentation/diversification, improving service and system resilience. There are considerable seasonal variations to consider, especially regarding storage of water. Social preferences could limit the uptake/demand for alternative water. One important conclusion is the value in addressing public perceptions of alternative systems, and assessing water end use in order to site systems appropriately. Other issues surround financing, encouraging uptake and addressing institutional/governance aspects surrounding equitable distribution. A further consideration is whether demand reductions might yield shorter-term improvements in performance without the need to institute potentially expensive alternative water strategies. Reducing non-revenue water is a priority. Such measures should be undertaken with alternative supply enhancement to reduce inequity of supply, improve system performance and increase resilience to future changes.

scholarly journals Optimal Implementation of Wastewater Reuse in Existing Sewerage Systems to Improve Resilience and Sustainability in Water Supply Systems

Water ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2004
Author(s):  
Aakash Dev ◽  
Timo C. Dilly ◽  
Amin E. Bakhshipour ◽  
Ulrich Dittmer ◽  
S. Murty Bhallamudi
Keyword(s):  
Wastewater Treatment ◽  
Water Supply ◽  
Wastewater Reuse ◽  
Treated Wastewater ◽  
Water Supply Systems ◽  
Test Cases ◽  
Decentralized Wastewater Treatment ◽  
Graywater Reuse ◽  
The Cost ◽  
Supply Systems

A transition from conventional centralized to hybrid decentralized systems has been increasingly advised recently due to their capability to enhance the resilience and sustainability of urban water supply systems. Reusing treated wastewater for non-potable purposes is a promising opportunity toward the aforementioned resolutions. In this study, we present two optimization models for integrating reusing systems into existing sewerage systems to bridge the supply–demand gap in an existing water supply system. In Model-1, the supply–demand gap is bridged by introducing on-site graywater treatment and reuse, and in Model-2, the gap is bridged by decentralized wastewater treatment and reuse. The applicability of the proposed models is evaluated using two test cases: one a proof-of-concept hypothetical network and the other a near realistic network based on the sewerage network in Chennai, India. The results show that the proposed models outperform the existing approaches by achieving more than a 20% reduction in the cost of procuring water and more than a 36% reduction in the demand for freshwater through the implementation of local on-site graywater reuse for both test cases. These numbers are about 12% and 34% respectively for the implementation of decentralized wastewater treatment and reuse.

scholarly journals Selection of filter parameters of Individual water supply systems

2019 ◽  
Vol 110 ◽  
pp. 01072 ◽  
Author(s):  
Vladimir Shcherbakov ◽  
Aleksandr Akulshin ◽  
Aleksandr Bachmetev ◽  
Anatolyi Akulshin
Keyword(s):  
Water Supply ◽  
Water Intake ◽  
Small Diameter ◽  
Design Flow ◽  
Water Supply Systems ◽  
Minimum Diameter ◽  
Water Well ◽  
Pumping Equipment ◽  
The Cost ◽  
Supply Systems

The paper is devoted to the problem of optimal design, construction and operation of water supply systems and their elements. The key element of the system is a water well. The quality of its design and construction determines the operation of the water intake as a whole. Disadvantages in the construction of a well lead to disruption of the entire water supply system of a particular object. The paper proposed a methodology for selecting the optimal diameter and length of the well filter of a water well. Based on the methodology, an example of filter parameters selection for hydrogeological conditions of the city of Kursk is given. The above calculation showed that the use of the entrance velocity criterion in the design of wells can significantly reduce the cost of well construction while ensuring the design flow rate and allowable lowering of the water level. The cost of the filter, depending on the well design, is 20-30% of the total price for its construction. The most important filter parameters affecting the cost of a well are its length and diameter. Justifying the minimum diameter of the filter that ensures the designed water intake and allowable dewatering can significantly reduce the cost of the well, taking into account the fact that modern pumping equipment allows the use of columns of small diameter above the filter.

PERENCANAAN PEMANFAATAN SISTEM PEMANENAN AIR HUJAN (PAH) DALAM MENDUKUNG PENERAPAN ECODRAIN DI KAMPUS B UNIVERSITAS NEGERI JAKARTA

2021 ◽  
Vol 16 (1) ◽  
pp. 18-25
Author(s):  
Fauziah Ismahyanti ◽  
Rosmawita Saleh ◽  
Arris Maulana
Keyword(s):  
Water Balance ◽  
Water Supply ◽  
Rainwater Harvesting ◽  
Water System ◽  
Water Source ◽  
Office Building ◽  
Water Volume ◽  
Water Balance Method ◽  
Rainwater Runoff ◽  
Alternative Water

This research is done to plan rainwater harvesting so that it can be used as an alternative water source on the campus B UNJ so it is expected to reduce groundwater use that can cause a puddle. The method used in the PAH development plan is a water balance method. This method compares the level of demand with water volume that can be accommodated or the availability of water (supply). Based on the results of the analysis, it was found that the potential for rainwater in the FIO office building A was 1773.95 m3 , FMIPA building B was 1904.62 m3 , the FIO lecture building C was 1613.21 m3 and the Ulul Albab mosque was 512.16 m3 . Potential rainwater obtained cistern PAH capacity of 200 m3 by saving water needs by 30% in building A FIO, building B FMIPA, and building C FIO. The capacity of the PAH cistern is 80 m3 by saving the water needs of the Ulul Albab mosque by 13.3%. Placement of the PAH cistern under the ground with a ground water system. Ecodrainage application by utilizing the PAH system can reduce drainage load by 0.158 m3 /second or 13.9% from rainwater runoff.

scholarly journals Modeling Study of Design Flow Rates for Cascade Water Supply Systems in Residential Skyscrapers

Water ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 2580
Author(s):  
Yang Zhou ◽  
Eric Lee ◽  
Ling-Tim Wong ◽  
Kwok-Wai Mui
Keyword(s):  
Water Supply ◽  
Mathematical Models ◽  
Flow Rate ◽  
Supply System ◽  
Water Supply System ◽  
Design Flow ◽  
Water Volume ◽  
Water Supply Systems ◽  
Supply Systems ◽  
Design Flow Rate

Skyscrapers are common nowadays around the world, especially in cities with limited development area. In order to pump water up to the higher level of a skyscraper, a cascade water supply system has to be installed. Currently, cascade water supply systems are mainly designed based on practical experiences or requirements of existing standards/guidelines that, in fact, are not specifically for skyscrapers. However, thorough studies on cascade water supply system designs are still limited in the literature. This study proposes mathematical models and uses Monte Carlo simulations to evaluate the design flow rate of a typical cascade water supply system that feeds various appliances in a residential skyscraper in Hong Kong. Graphs that showed the correlations between the inflow rate in the supply pipe and water volume in the tank are obtained. While tank storage volume is confirmed, the design flow rate of the cascade water supply system can be determined from these graphs. The proposed mathematical models can also be applied to evaluate the design flow rate of cascade water supply systems in other types of skyscrapers (e.g., office, commercial building) as well as with the changes in water demand patterns in the models.

PSO Applied to Reduce the Cost of Energy in Water Supply Networks

2013 ◽  
Vol 409-410 ◽  
pp. 703-706 ◽  
Author(s):  
Bruno Melo Brentan ◽  
Edevar Luvizotto Jr. ◽  
Lubienska Cristina L.J. Ribeiro
Keyword(s):  
Water Supply ◽  
Extended Period ◽  
Water Supply Systems ◽  
Operational Parameters ◽  
Supply Networks ◽  
Water Pumping ◽  
Cost Of Energy ◽  
Pumping Stations ◽  
The Cost ◽  
Supply Systems

The growth of urban population and subsequent expansion of the cities impose difficulties of gather a reliable water supply systems that attend the fluctuations of demand throughout the day, and their operation with appropriate hydraulic and operational parameters. The search of better routines for water pumping stations with both starting and stopping of pumps or use of variable speed devices has become increasingly common, and the motivation of this search is found in the need for energy saving. But the task is arduous and becomes fertile field for the application of modern techniques and robust optimization. Noteworthy are currently those that seek their inspiration in nature systems, such as Particle Swarm Optimization, which is based on intelligence of groups, such as schools of fish or swarms of bee. By this way, the present work aims to contribute to the topic, developing a hybrid algorithm (simulator-optimizer) for determination of optimized routines for pumping station i.e., routines that seek the best operational routine for an extended period of 24 hours.

The Application of Rain Water Harvesting Method on a Low Income Flat in Cengkareng, Jakarta

2015 ◽  
Vol 747 ◽  
pp. 317-320 ◽  
Author(s):  
Yosica Mariana ◽  
Junius Ngadinata ◽  
Renhata Katili ◽  
Religiana Hendarti
Keyword(s):  
Water Supply ◽  
Low Income ◽  
Rainwater Harvesting ◽  
Rapid Development ◽  
Rain Water ◽  
Capital City ◽  
Water Harvesting ◽  
Rain Water Harvesting ◽  
Harvesting Method ◽  
Alternative Water

This paper presents a study of the application of the theory of rainwater harvesting for a low income flat in West Jakarta. The background of this study is that Jakarta as a capital city of Indonesia is actually experiencing water crisis because of the rapid population growth and the building construction. This rapid development in consequence affects a reduction on the ground water supply. Therefore, this study analyse the amount of rain water that can be an alternative water supply particularly for a low income flat. This study focused on the water supply for the flushing toilet. To accommodate that objective, a brief calculation of water catchment area and the amount of water that can be harvested has been conducted. The results showed that in general the water supplied by the rain water harvesting can provided 100% annually, but since the precipitation in August is relatively low, in consequence, the water suply should be provided by the local government water company (PDAM).

scholarly journals ABOUT FEATURES OF WATER CONSUMPTION CALCULATION WHEN DESIGNING WATER SUPPLY SYSTEMS OF HIGH-RISE BUILDINGS

2020 ◽  
Vol 10 (2) ◽  
pp. 29-35
Author(s):  
Sayriddin Sh. SAYRIDDINOV
Keyword(s):  
Water Supply ◽  
Water Consumption ◽  
Water Supply Systems ◽  
High Rise ◽  
Advantages And Disadvantages ◽  
Supply And Distribution ◽  
Effi Ciency ◽  
The Cost ◽  
Supply Systems ◽  
Research And Design

This article discusses the hydraulic and technological features of calculating water consumption when designing water supply systems for high-rise buildings in order to increase the effi ciency of water supply and distribution in a given projected object. The basic criteria for the operation of water supply systems for high-rise buildings in accordance with modern requirements of regulatory documents are given. The technological need is justifi ed and completed operational, technological and feasibility analysis of the applicability of methods determination of water consumption to improve the effi ciency of water supply systems of high-rise buildings. Advantages and disadvantages of methods for determining the cost of internal water supply performed by various research and design institutes are indicated.

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