Effectiveness of combined upflow roughing filter and upflow slow sand filter to reduce turbidity in Citarum water as a source of drinking water

Turbidity of Citarum River was high, fluctuating and used as drinking water source by people and PDAM (Regional Drinking Water Company). The aim of this study was to determine the ability of upflow roughing filter (URF) and upflow slow sand filter (USSF) in reducing turbidity. It was called multistage filtration (MSF). MSF was varied with and without settler. Gravel diameters and perviousness as follows: 0.5 cm was 0.243, 1 cm: 0.264, 2 cm: 0.265, 5 cm: 0.302 or just 24 - 30% of total URF’s volume. When settler was run with surface loading 0.5 m3/m2/hour, flowrate 0.67 l/minute, turbidity 321.16 - 3,496.53 NTU, efficiency was 57.9 - 96.2%. Settler reduced turbidity significantly. URF1 enhanced turbidity removal. However, URF2, URF3, USSF were not effective. In experiment without settler, turbidity was 130.78 - 533.00 NTU but its reduction in URF1 was bad. But in URF2 turbidity was almost the same as in experiment with settler. Efficiency was 41.9 - 89.1%. Here URF1 and URF2’s function were almost the same as settler and URF1. URF3 was ineffective, can be removed. USSF was still needed even though only able to reach 10-25 NTU. URF and USSF contributed to higher efficiency of turbidity removal.

Masalah dan Optimasi Rapid Sand Filter

Rapid Sand Filter is the most popular unit operation in water treatment plant although it has some problems in its operation and maintenance. But this filter is used widely in Indonesia by PDAM, a water company, because of its capability to treat big capacity of water. The crucial problem is backwashing, about the upflow velocity in theoretical and practical aspects.

Analisis Ketersediaan Air Baku Pada Pdam Tirta Anoa Di Kota Kendari

The provision of clean water to meet the needs of the community is something important, and the availability of clean water must be considered in order to meet the needs of the community, especially in Kendari City. This study aims to analyze the availability of raw water at the Regional Water Company (PDAM) Tirta Anoa Kendari City. The method used is the method of raw water availability by using discharge data from the Pohara River and the Wanggu River in 2010-2019. The results of this study are the availability of raw clean water at PDAM Kendari City is the production discharge of 300 ltr/second, the production discharge of Matabondu Springs of 50 l/second, the production discharge of the Wanggu River of 20 l/second, and the Anduonohu spring discharge of 5 ltr. /sec and Anggoeya at 40 liters/sec Keywords: raw water, availability, PDAMPenyedian air bersih untuk memenuhi kebutuhan masyarakat merupakan sesuatu yang penting, dan ketersediaan air bersih harus diperhatikan agar dapat memenuhi kebutuhan masyarakat, khususnya di Kota Kendari. Penelitian ini bertujuan untuk menganalisis ketersediaan air baku pada Perusahaan Daerah Air Minum (PDAM) Tirta Anoa Kota Kendari. Metode yang digunakan yaitu metode ketersediaan air baku dengan menggunakan data debit Sungai Pohara dan Sungai Wanggu tahun 2010-2019. Hasil Penelitian ini yaitu ketersediaan air bersih baku pada PDAM Kota Kendari adalah debit produksi sebesar 300 ltr/detik, debit produksi Mata Air Matabondu sebesar 50 l/detik, debit produksi Sungai Wanggu sebesar 20 l/detik, dan debit Mata air Anduonohu sebesar 5 ltr/dtk dan Anggoeya sebesar 40 liter/dtk Kata Kunci : Air Baku, Ketersediaan, PDAM

Transforming a water company to improve service levels and resilience: Lessons from Sierra Leone

All water companies need to be able to provide safe, adequate and reliable water supplies to their customers and consumers. Yet some work under very daunting conditions. The civil war in Sierra Leone resulted in the destruction of much water supply infrastructure. It also had a devastating impact on the performance of water companies. Since the war ended in 2002 other changes continue, such as: population growth, unplanned urbanisation, environmental destruction and climate change, plus the Ebola outbreak. These pressures all have a massive impact on the natural environment and on demands for water. It is against this background that Guma Valley Water Company is trying to rebuild water infrastructure and strengthen utility arrangements for providing a reliable and affordable service on which people depend. This article describes ongoing efforts to improve water supply in Freetown. The case study highlights the multi-faceted nature of resilience building and the processes that must be undertaken if water companies are to become resilient. Long-term technical and financial support is required, however, programmes should be realistic in their expectations.

THE ROLE OF TQM AND ORGANIZATIONAL CULTURE ON OPERATIONAL PERFORMANCE

TQM is one of the essential factors in organizational activities. This research aims to determine how TQM elements and organizational culture can lead to operational performance in a mineral water manufacturer in Pasuruan, East Java, Indonesia. Aside from that, researchers also measure how TQM elements, organizational culture, and operational performance can affect corporate performance. The respondents are 50 people from staff, suppliers, and consumers of the manufacturer. The method used in this research is a quantitative method that uses path analysis. The results showed that there is a significant impact between soft TQM elements towards operational performance. The results also showed a significant effect between hard TQM elements, organizational culture, and operational performance towards corporate performance. This research differs from other studies because the model analysis correlates organizational culture with TQM elements in a mineral water company.

Measurement Of Company Performance With Approach Balanced Score Study Case: Regional Drinking Water Company

Performance is a process carried out in achieving a result for each company or organization in the stage of providing services or products to customers within a certain period of time in accordance with their duties and functions. This study aims to conduct and see the overall organizational picture of the performance assessment of the Regional Water Company (PDAM) of Sungai Penuh Jambi City using the Balanced Score Card approach. viewed from four perspectives, namely: financial perspective, customer perspective, internal business perspective, and learning and growth perspective. From the results of the research on the Performance Measurement of Regional Drinking Water Companies (PDAM) of Sungai Penuh Jambi City using the Balanced Scorecard approach from a financial perspective through the current ratio, profit margin, operation ratio, return on investment, it shows that the company's financial performance is in good condition despite a decline in sales in 2019 For performance measurement based on customer perspective from customer acquisition, customer retention, customer satisfaction, customer satisfaction can be said to be good, although customer satisfaction that the Regional Drinking Water Company (PDAM) of Sungai Penuh Jambi City in 2020 can be said to be not good. Furthermore, the correlation/correlation of performance based on the perspective of internal business processes on the motivation variable, power alignment, has an influence level of 50.9% with a significance level of <5% or 0%, but for training it has a significance level. below 5% or equal to 0%. The performance based on the learning and growth perspective on employee satisfaction, employee retention, productivity, contributes positively to the company's economic improvement.

Technical condition of sewer networks in the Czech Republic

This article offers a comparison of the detected defects in sewerage systems operated by water companies and by self-operators, determines their quantity and classifies them into individual categories. The determination of the number of the defects at self-operators is evaluated on the basis of performed camera inspections and compared with data provided by the water company.

Effectiveness of combined up-flow roughing filter and up-flow slow sand filter to reduce turbidity in Citarum water as a source of drinking water

The turbidity of the Citarum River was high, fluctuating, and used as a drinking water source by PDAM (Regional Drinking Water Company). This study aimed to determine the ability of a combined up-flow roughing filter (URF) and an up-flow slow sand filter (USSF) in reducing turbidity, called multistage filtration (MSF). MSF was varied with and without settlers. Gravel diameters and perviousness: 0.5 cm was 0.243, 1 cm: 0.264, 2 cm: 0.265, 5 cm: 0.302 or 24-30% of URF’s volume. When settler was run with surface loading 0.5 m3/m2/hour, flowrate 0.67 l/minute, turbidity 321.16-3,496.53 NTU, the efficiency was 57.9-96.2%. Settler reduced turbidity significantly. URF1 enhanced turbidity removal. However, URF2, URF3, USSF were not effective. In an experiment without a settler, turbidity 130.78-533.00 NTU, but its reduction in URF1 was bad. In URF2 turbidity was almost the same as in the experiment with the settler. Efficiency was 41.9-89.1%. Here URF1 and URF2’s functions were almost the same as settler and URF1. URF3 was ineffective, can be removed. USSF was needed even though only able to reach 10-25 NTU. URF and USSF contributed to the higher efficiency of turbidity removal.

Integration of Quality Function Deployment Method with Theory of Inventive Problem Solving in an Effort to Improve Clean Water Quality in Tirtanadi Regional Drinking Water Company Sunggal Medan Branch

Clean water is the main natural resource that is very important in human life because almost some of our daily activities require water such as bathing, drinking, washing clothes, cooking, etc. The purpose of this study is to analyze integration of quality function deployment method with theory of inventive problem solving in an effort to improve clean water quality in Tirtanadi Regional Drinking Water Company Sunggal Medan Branch. This research was conducted by using descriptive correlational method. The population of this research is the active customers of Tirtanadi Regional Drinking Water Company Sunggal Medan Branch. The number of active customers of Tirtanadi Regional Drinking Water Company Sunggal Medan Branch is 502,503 the number of subscribers in 2021. Because the number of customers is so large, the researcher draws the number of respondents using simple random sampling and random sampling of respondents based on the arrival of customers. Analysis of the results of data processing using the house of quality (HoQ) and the TRIZ method. From the results of the study obtained the following results that average level of importance, sorted from the highest value are the dimensions of turbidity, odor, color, taste, iron and residual chlorine. While the value of each dimension is 4.54; 4.33; 4.3; 4.21; 4.12; 4.00. Performance level analysis The order of the average value of the perception level starting from the largest is the dimensions of turbidity, odor, taste, color, iron and residual chlorine with a value of 3.90; 3.67; 3.65; 3.64; 3.56; 3.1. The level of improvement is a comparison between the value expected by the company and the level of customer satisfaction with water quality. Sales Point consists of data processing, it can be seen that there are 9 attributes worth 1.5 which means that changes in these attributes have a major effect on the quality of clean water. Keywords: Quality Function Deployment Method, Theory of Inventive .Problem Solving, Clean Water Quality.