Water Company Research Articles

Research on fault diagnosis of main equipment based on watershed power production data center

Abstract With the development of intelligent hydroelectric power stations and centralized control centers, water and hydropower development companies in various river basins have constructed power production data centers, establishing standardized and normalized data models and connecting the underlying system channels. Based on the power production data center, this paper constructs a unified data model for monitoring the main equipment and, in response to the shortcomings of the existing equipment alarm mode, analyzes the advantages of expert knowledge and intelligent diagnostic methods. It establishes a comprehensive diagnostic system for the main equipment of power stations, providing multi-level and multi-perspective diagnostic reference opinions. This system is of great significance for promoting the development of intelligent hydroelectric power and centralized control. Finally, taking the operating condition data of a mixed-flow turbine generator unit as an example, the effectiveness of the comprehensive diagnostic model is analyzed and verified.

Agency in green path development: Circular bioeconomy in the wastewater sector

ABSTRACT The mounting pressures of climate change and biodiversity loss require a transition towards more sustainable patterns of production and consumption. Within the bioeconomy, better utilization of natural resources can be achieved by pursuing a circular bioeconomy. In the article the authors study how circular bioeconomy efforts in the Hamar region, Norway, have resulted in green path development. They draw on the trinity of change agency conceptualization to deepen our understanding of how agency over time has resulted in green path upgrading in the region. Through a qualitative study, they provide novel insights into the agency of an inter-municipal water and wastewater company in green path development processes. The authors conclude that a combination of different forms of agency, exercised by different actors, has resulted in what they regard as emerging green path development within the region.

Dunside reservoirs discontinuance: taking a new approach

Discontinuance of reservoirs, particularly those retained by ageing embankment dams, is becoming a common option for water companies who no longer need these assets for their water supply network. This paper will examine the discontinuance of Dunside Upper and Lower reservoirs, describing the novel aspects of the project, along with the method of project delivery, and how they contributed towards the success of the project. It will also describe the process for removal under the Reservoirs (Scotland) Act 2011, which in the case of complete removal of the reservoir is termed abandonment.

Determining the range of negotiable prices for public–private partnership infrastructure projects: a simulation approach

PurposeThis research aims to measure the public sector comparator (PSC) to reach public–private partnership (PPP) projects' negotiable price range for water and sewage companies in Iran. PSC measurement drives the public sector to make valid decisions about costs.Design/methodology/approachAround 170 risks were primarily determined through studying numerous articles. Then, risk effects were specified by distributing questionnaires in two steps. The questionnaires are distributed among experts on PPP-related projects and the Monte Carlo simulation method is used for confidence factors of 70, 80 and 90%. PSC is measured based on these results to study cases of Sirjan’s sewerage and sewage purification systems.Findings11 risks were identified as the main risks that are effective on PSC, and project implementation costs were specified based on the modeling. The corruption of the private and public sectors was identified as the most effective risk in this research. It can affect a project’s cost up to 158% in the construction period and up to 134% in the operation period. Based on the obtained results, 63% of this risk’s cost goes to the public sector.Originality/valueThe originality of this research is the PSC measurement method and appointing the risk share of each private and public sector. The results of this research can be applied to all the infrastructure and PPP projects in Iran and other developing countries as a way for employers to estimate accurate negotiable price ranges.

Analisis Kadar Mangan (Mn) dan Besi (Fe) Pada Instalasi Pengolahan Air Minum (IPA 3) PT Hanarida Tirta Birawa

Population growth continues to increase, making the need for clean water increasingly increasing. The quality of raw water needed as a source of clean water also requires further processing to ensure it meets quality standards. To make clean water and drinking water suitable for consumption by the community, the role of the Regional Drinking Water Company (PDAM) is needed. PT Hanarida Tirta Birawa is one of the companies that serves clean water needs in Sidoarjo Regency. Clean Water Treatment Plants will have a big impact on environmental quality, especially water. The parameters that have the greatest influence on the content of raw water that will be processed into clean water are Fe (Ferrom/Iron) and Mn (Manganese) contained in raw water. At PT Hanarida Tirta Birawa, the manganese (Mn) content ranges from 0.04 to 0.13 mg/l and iron (Fe) ranges from 0.11 to 0.17 mg/l and meets the quality standards of RI Minister of Health Regulation No. 492/Menkes/PER/IV/2010. The reduction in processed water reached 87.23% for manganese and 93.29% for iron.

Efek Pengendalian Internal dan Sistem Informasi Akuntansi Terhadap Kualitas Laporan Keuangan

This research employs a quantitative method with the population consisting of Regional Water Companies in both Sukabumi City and Sukabumi Regency. The sampling technique used is purposive sampling, with a total of 51 respondents from both companies in Sukabumi City and Sukabumi Regency. The data used are primary data collected through the distribution of questionnaires. After the data was collected, the analysis was conducted using the SPSS 27 For Windows application, including data quality test, classical assumption test, multiple linear regression test, and hypothesis test. The research findings conclude that both aspects, namely internal control and accounting information systems, have a significant combined effect on the quality of financial reports. Additionally, separately, internal control and accounting information systems also have a significant effect on the quality of financial reports.

The Public Service and its new crises

The notion of public service for Brazilian administrative law has always been endowed with a natural fog, which involves dogmatic discussion based on the uncertainties of the elements and the scope of the concept, extending into spaces where new execution models continue to foster doubt. The debate on the distinction between public service and economic activity is once again on the agenda of administrative law, as the economic crisis influences adjustments aimed at the privatization of state-owned companies such as the Brazilian postal and telegraph company and the Rio water and sanitation company of January. In the reflections set out in this essay, we propose premises to face the “new crises” of public service, elucidating issues that compromise the efficiency of the State's administrative function, in points relating to its universality and adequacy. It is an invitation to doubt and conjecture many answers to the same question. What are the risks of Brazilian public service?

Mathematical Modeling of Drinking Water Losses Management Case Study – Cairo - Egypt

Water, As A Precious natural resource, necessitates sustainable management to minimize wastage. Excessive leakage, particularly in regions confronting water scarcity such as Egypt, directly undermines environmental objectives and principles of cost recovery. Effective water management is pivotal for reducing losses and optimizing efficiency. Accurate measurement of water production and distribution is essential to identify losses and assess water utilities' performance. This data aids in pinpointing the root causes of losses, whether physical or commercial, facilitating targeted reduction strategies. Forecasting supply-demand balance is critical for planning water networks and treatment facilities. Detailed infrastructure information enables decision-makers to discern areas experiencing water shortages and those with surplus resources. Our aim is to probe the causes of water losses in Cairo's drinking water network, the capital of Egypt, and propose managerial solutions. Operational efficiency relies on minimizing labor, material, and energy costs. Water loss poses a significant operational challenge, as components of non-revenue water can significantly impact utilities' financial stability. The IWA Water Balance offers a standardized approach to water audits, facilitating a comprehensive analysis of water production, storage, and distribution. This analysis aids in quantifying the magnitude of the water loss problem and prioritizing corrective actions based on revenue and non-revenue water components. The Cairo Water Company is entrusted with producing 5.5 million cubic meters of purified drinking water per day from 11 treatment plants, serving a network spanning 13,307 kilometers and supported by 20 maintenance centers. With a focus on serving 1.1 million citizens in compliance with Egyptian regulations, our study encompasses various metrics, including billed and unbilled consumption, unauthorized usage, and metering inaccuracies, to calculate commercial losses. Additionally, we evaluate main and storage leakages, as well as service connection leakages up to the customer meter, to determine technical losses. Through a mathematical module, we compute non-revenue water (NRW) and infrastructure leakage index (ILI) metrics. Performance indicators are utilized to assess the effectiveness of water utilities in managing losses and asset maintenance. Our designed module empowers decision-makers to evaluate and enhance asset methodologies for water loss management.

The Effectiveness of The Use of E-Commerce and Digital Payment on Brand Awareness of Private Regional Drinking Water Companies (PDAM)

The Effectiveness of The Use of E-Commerce and Digital Payment on Brand Awareness of Private Regional Drinking Water Companies (PDAM)

Pengaruh Kompetensi dan Lingkungan Kerja Terhadap Kinerja Pegawai Pada Perusahaan Daerah Air Minum (PDAM) Kabupaten Gowa

The purpose of this study was to determine the effect of competence and work environment on employee performance at the Regional Drinking Water Company (PDAM) Tirta je'neberang, Gowa Regency. The types of data used in this research are qualitative and quantitative data. Sources of data used in this study are secondary data and primary data. The analytical method used is descriptive analysis, multiple linear regression, and (T test, and F test, coefficient of determination) Y=4.376+0.639+0.1552. The results of the analysis of the correlation coefficient on the variable (X1) to (Y) of 0.951 which indicates the relationship which is strong while the variable X2 to Y is 0.980. The coefficient of determination is 97% then through the calculated f test of 640.186 > f table of 3.25 then through the t-test on the X1 variable to the Y variable at 3.775 > 1.687 while the X2 variable against the Y variable 9.449 > 1.687 so that Ha is accepted and Ho is rejected. Thus the hypothesis which states that competence and work environment partially and simultaneously have a significant effect on employee performance at the Regional Air Mining Company (PDAM) Tirta je'neberang, Gowa Regency.

Integrated Analysis of Water Quality in Treatment Plants: Physicochemical and Biological Assessments

Water treatment plants (WTPs) play a crucial role in ensuring access to safe drinking water, essential for human health and well-being. This study focuses on the IPA Kedunguling, operated by the Regional Drinking Water Company Sidoarjo, which serves the residents of Sidoarjo city. The objective was to evaluate the water treatment process and quality using physical, chemical, and biological assessments in accordance with Ministry of Health Regulation No. 2/2023 and Government Regulation No. 66/2014. The process involves raw water intake at the Intake, followed by treatment at the WTP and distribution to residents. Laboratory tests revealed that chemical and biological parameters met regulatory standards; however, Total Dissolved Solid (TDS) levels exceeded permissible limits, highlighting a potential area for improvement. This study underscores the importance of continuous monitoring and optimization of water treatment processes to ensure the provision of safe drinking water to communities. Highlights : Water treatment plants ensure access to safe drinking water, vital for human health. Evaluation of IPA Kedunguling's water treatment process and quality according to regulatory standards. Laboratory tests identify areas for improvement, particularly in Total Dissolved Solid levels. Keywords: Water treatment plants, water quality assessment, regulatory compliance, drinking water safety, continuous monitoring.

Person Job Fit, Job Crafting, Dan Work Engagement Dan Pengaruhnya Terhadap Organizational Citizenship Behavior Pada Perusahaan Daerah Air Minum Surya Sembada Kota Surabaya

This research is intended to determine the influence of Person Job Fit, Job Crafting and Work Engagement on Organizational Citizenship Behavior in Employees of Regional Drinking Water Company (PDAM) Surya Sembada Surabaya City by involving 65 employees of PDAM Surya Sembada Surabaya City as respondents in this research. The research results prove that Person Job Fit has a positive and significant effect on Organizational Citizenship Behavior. This means that if the employees have the appropriate Person Job Fit, a sense of mutual help behavior will be created between employees. Job Crafting has a positive and significant effect on Organizational Citizenship Behavior. This means that if employees apply Job Crafting, it will increase Organizational Citizenship Behavior. Work Engagement has a positive and significant effect on Organizational Citizenship Behavior. This means that if employees feel work engagement, it will also increase Organizational Citizenship Behavior. Simultaneously Person Job Fit, Job Crafting and Work Engagement have a positive and significant effect on Organizational Citizenship Behavior with coefficient of determination of 0,96 or 96%, this indicates that the Organizational Citizenship Behavior variable can be explained by the Person Job Fit, Job Crafting and Work Engagement variables by 96%.

Use of Unmanned Surface Vehicles (USVs) in Water Chemistry Studies.

Unmanned surface vehicles (USVs) equipped with integrated sensors are a tool valuable to several monitoring strategies, offering enhanced temporal and spatial coverage over specific timeframes, allowing for targeted examination of sites or events of interest. The elaboration of environmental monitoring programs has relied so far on periodic spot sampling at specific locations, followed by laboratory analysis, aiming at the evaluation of water quality at a catchment scale. For this purpose, automatic telemetric stations for specific parameters have been installed by the Institute of Marine Biological Resources and Inland Waters of Hellenic Centre for Marine Research (IMBRIW-HCMR) within several Greek rivers and lakes, providing continuous and temporal monitoring possibilities. In the present work, USVs were deployed by the Athens Water and Sewerage Company (EYDAP) as a cost-effective tool for the environmental monitoring of surface water bodies of interest, with emphasis on the spatial fluctuations of chlorophyll α, electrical conductivity, dissolved oxygen and pH, observed in Koumoundourou Lake and the rivers Acheloos, Asopos and Kifissos. The effectiveness of an innovative heavy metal (HM) system installed in the USV for the in situ measurements of copper and lead was also evaluated herewith. The results obtained demonstrate the advantages of USVs, setting the base for their application in real-time monitoring of chemical parameters including metals. Simultaneously, the requirements for accuracy and sensitivity improvement of HM sensors were noted, in order to permit full exploitation of USVs' capacities.

Application of the K-Medoids Algorithm in Clustering PAM Customers Based on Provinces in Indonesia

Application of the K-Medoids Algorithm in Clustering PAM Customers Based on Provinces in Indonesia

Adaptive Mechanism for Water and Wastewater Construction Companies in Coping with the Disruption of Projects Due to Crisis

The water and wastewater construction company (WWCC) plays an important role maintaining water sustainability for human. It is a very intricate industry vulnerable to disruptions, delays, and disputes in times of crisis or pandemic. It is a system that has internal interactions on its 5Ms of management such as Man, Material, Machine, Method, and Money that are sensitive to change affected by external environment which in turn affected their current projects. One of the external factors that affected WWCC in the year 2020 is the occurrence of coronavirus covid19. During the pandemic, the global construction industry including WWCC have experienced drastically altered risk environment applied to funding, labor shortages, material delays, suspension, and termination of contracts (Barriere 2020). The pandemic has affected WWCC’s 5Ms of management that ranges that eventually affected the triple constraints of projects such as scope, time, and cost. The study has determined the level of severity of the effect before and during covid19 to WWCC’s 5Ms of management that eventually affected the three interdependent constraints of projects. The data gathered before and during covid19 were compared and ultimately utilized in formulating the adaptive mechanism for WWCC in coping with the disruption of projects during crisis. The adaptive mechanism comprises of the precontemplation and contemplation phases. During pandemic, WWCC has to determine if there is a need for change in their organization. They have to adapt through precontemplation through internal and external scanning and situational analysis in order for them to comprehend and adapt to the change. WWCC upon realizing of the needed change, has to continue with the contemplation stage by utilizing the stop, start and continue (SSC) principle. To be more precise with the implementation of change, WWCC has to exercise pause, focus and identify prior to executing the SSC principle, followed by implementation, action, and maintenance.

Perbaikan Kualitas Pelayanan dengan Metode Integrasi Servqual dan Diagram Kartesius di Perusahaan Daerah Air Minum Tirta Moedal Semarang

This study aims to identify the service attributes that are important to consumers using the servqual integration method and cartesian diagrams. With the help of the SPSS tool, 120 respondents were surveyed. The results show that the quality of service provided by Tirta Moedal Water Company is good, with an average performance score of 3.5 on a scale of 1 to 5. The dimensions that need to be improved are responsiveness and empathy. These attributes include the process of handling complaints, providing information during maintenance, the speed of responding to customer complaints, the ability of employees to listen to customer complaints, and the availability of consultation and complaint services for consumers. This study is expected to help improve service quality and maintain existing attributes.

Impact Evaluation of Wastewater Treatment Based on the Anaerobic Digestion of Sewage Sludge Using the Life Cycle Assessment Method

All the inputs and outputs of a technical system can be interpreted from an environmental point of view. Using the life cycle assessment (LCA) approach, some changes that are less harmful to the environment can be included in the system. This research aims to evaluate the environmental effects of the wastewater treatment plant (WWTP) in South Tehran, and the LCA method was used in this study. Based on the data of qualitative parameters obtained from the measurement of Tehran province’s water and sewage company, the environmental emissions were calculated and analyzed using SimaPro software (9.0.0) and the standards defined under the ReCiPe 2016-midpoint method. In the ReCiPe 2016 method, the results were expressed in two intermediate levels (including three classes of influence) and final (including 18). The results showed that the treated wastewater and chlorine factors had the most adverse environmental effects. Among the 18 effect classes, the treated wastewater in the class of marine environmental toxicity with the amount of 101.1531 kg 1,4-DCB had the most environmental impacts among other classes. The power consumed by the biogas-burning combined heat and power (CHP) unit in the wastewater treatment (WWT) process reduced the environmental effects in most impact classes. The most adverse environmental effects of the WWT process are related to damage to human health and the ecosystem. According to the findings, the use of CHP systems is suggested for energy saving and also for reducing harmful effects on the environment.

The Impact of Climate Change on the Failure of Water Supply Infrastructure: A Bibliometric Analysis of the Current State of Knowledge

With ongoing climate change, new threats appear to the operation of water supply systems (WSSs), which are related to the amount of available drinking water resources, its quality, the operation of existing water supply infrastructure and changes in consumer behavior. The paper presents a bibliometric analysis of the state of knowledge on the impact of climate change on the failure of water supply infrastructure. The bibliometric analysis was performed based on the VOSviewer program. The results of the analysis indicate current research trends in this area around the world and allow the identification of strengths and weaknesses. Most research concerns the identification of factors related to the impact of climate on the failure rate of water distribution systems. A popular research topic was also the prediction of water supply network failures, taking into account the impact of climatic factors. The main research gap is determining the impact of climate change on water quality. The acquired knowledge can be used by water companies, policy-makers and other researchers to plan adaptation strategies to climate change, which pose new challenges for the operation of water supply systems. The conducted bibliometric analysis also allowed for identifying research gaps.

Quality assessment of different polyethylene-packaged groundwater in the Ilorin metropolis of Nigeria for compliance with standards

There is a notable proliferation of sachet water brands in the Ilorin Metropolis of Nigeria. However, more information regarding their safety for human consumption is required. This study aimed to determine the quality attributes of sachet water produced within the Ilorin metropolis of Nigeria to ascertain their conformity with regulatory standards. Three sachet water companies were each selected from three Local Government Areas within the study area. Physicochemical and microbial analyses were conducted on the collected water samples within 24 hours of production and monthly during 4-month storage. The results showed that temperature (25.10-30.13 ℃) and turbidity (0.37-2.84 NTU) were within permissible limits. Total hardness (36.0-136.33 mg/L) and pH (6.42-8.86) significantly (p ≤0.05) increased during storage and were above standards in some samples. There were significant (p ≤0.05) variations in chlorides (2.83-8.57 mg/L), nitrates (0.15-0.64 mg/L), sulphates (4.70-7.12 mg/L), and sodium contents (10.16-18.74 mg/L) but all were within standards. While five of the nine sachet water brands complied (2-100 CFU/mL) with the limit of 100 CFU/mL for the total viable count, all the samples failed the zero-tolerance requirement for coliform. Possible fecal contamination was concluded as the main concern with the sachet water brands produced within Ilorin Metropolis, suggesting their unfitness for human consumption. The water brands may, therefore, pose severe health hazards to consumers and threaten public health. In conclusion, the study demonstrated the likely unfitness of some sachet water brands in the Ilorin Metropolis of Nigeria for human consumption, owing to fecal coliform. This underscores the need for regulatory agencies to intensify the certification process of prospective sachet water factories. Furthermore, regular inspections of certified factories and their practices and products are recommended to ensure continued compliance with regulatory standards.

Risk‐Constrained Optimal Scheduling in Water Distribution Systems Toward Real‐Time Pricing Electricity Market

AbstractIn recent years, as a result of emerging renewable energy markets, several developed regions have already launched Real‐Time Pricing (RTP) strategies for electricity markets. Establishing optimal pump operation for water companies in RTP electricity markets presents a challenging problem. In a RTP market, both positive and negative electricity prices are possible. These negative prices create economically attractive opportunities for Water Distribution System (WDS) to dispatch their energy consumption. On the other hand, excessively high prices may put WDS at risk of supply disruptions and reduced service levels. However, the continuous development of wind power and photovoltaics results in more volatile and unpredictable fluctuations in the price of renewable energy. The risk arising from uncertainty in electricity prices can lead to a significant increase in actual costs. To address this issue, this paper develops an a posteriori random forest (AP‐RF) approach to forecast the probability density function of electricity prices for the next day and provide a risk‐constrained pump scheduling method toward RTP electricity market. The experimental results demonstrate that the developed method effectively addresses the issue of increased costs caused by inaccurate electricity price forecasting.