scholarly journals Improving wastewater treatment plants operational efficiency and effectiveness through an integrated performance assessment system

2020 ◽  
Vol 3 (1) ◽  
pp. 276-287
Author(s):  
J. Cassidy ◽  
T. Silva ◽  
N. Semião ◽  
P. Ramalho ◽  
A. Santos ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Performance Assessment ◽  
Asset Management ◽  
Wastewater Treatment Plants ◽  
Treatment Phase ◽  
Operating Conditions ◽  
Assessment System ◽  
Performance Assessment System ◽  
Efficiency And Effectiveness ◽  
Rehabilitation Needs

Abstract Optimizing the efficiency of urban water systems is a growing concern for water utilities worldwide. Wastewater treatment plants (WWTP) are crucial in maintaining water quality and resource recovery in a world facing growing challenges such as climate change, water-energy-food nexus and the increase of legal requirements and users' expectations. Thus, adopting a performance assessment system (PAS) is of the utmost importance to assess operating conditions and to identify critical aspects of the WWTP which can negatively affect its effectiveness, efficiency and reliability. This paper presents the global and operational performance assessment of an urban WWTP and identifies improvement measures. The WWTP presented a good performance in terms of effectiveness and reliability. Nevertheless, in terms of efficiency, relevant improvement opportunities were identified, specifically in the sludge treatment phase and in terms of energy management. PAS was proven to be successful in the identification and prioritization of rehabilitation needs in a systematic way which will continuously improve the efficiency and effectiveness of the WWTP as well as to support asset management decisions regarding their upgrade and retrofit.

Operational energy performance assessment system of municipal wastewater treatment plants

2010 ◽  
Vol 62 (6) ◽  
pp. 1361-1370 ◽  
Author(s):  
Lingbo Yang ◽  
Siyu Zeng ◽  
Jining Chen ◽  
Miao He ◽  
Wan Yang
Keyword(s):  
Wastewater Treatment ◽  
Performance Assessment ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Energy Performance ◽  
Influential Factors ◽  
Assessment System ◽  
Municipal Wastewater Treatment ◽  
Operational Energy ◽  
Municipal Wastewater Treatment Plants

Based on the statistical analysis of operational energy consumption and its influential factors from data of 599 Chinese WWTPs in 2006, it is noticed that the most influential factors include treatment technology adopted, treated sewage amount, removed pollutants amount, etc. Using the conclusion above, this paper sets up an integrated system of operational energy performance assessment for municipal wastewater treatment plants. Combining with result from on-spot research and model simulation, the calculating method of benchmark value and score of 7 energy efficiency indicators grouped into 3 levels is stated. Applying the assessment system to three plants, its applicability and objectivity are proved and suggestions to improve energy performance are provided.

scholarly journals Performance Assessment System for Energy Efficiency in Wastewater Systems

Water ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 1807
Author(s):  
Catarina Jorge ◽  
Maria do Céu Almeida ◽  
Dídia Covas
Keyword(s):  
Energy Efficiency ◽  
Performance Assessment ◽  
Asset Management ◽  
Energy Use ◽  
Assessment System ◽  
Greenhouse Gases Emissions ◽  
Performance Assessment System ◽  
Wastewater Systems ◽  
And Control ◽  
Support Decision Making

Performance assessment is essential to effectively evaluate and monitor the activity of water utilities, support decision making, and encourage continuous improvement. Performance assessment systems (PAS), covering several service objectives and criteria, have been successfully applied in water supply and wastewater systems. Tailored approaches focusing on the assessment of the energy use and efficiency in wastewater systems are still limited. This paper aims at the development and demonstration of a comprehensive PAS for energy efficiency, tailored for wastewater systems, incorporating criteria related to energy consumption, operation and maintenance (O&M) costs, and environmental impacts, such as untreated discharges and greenhouse gases emissions, among others. Management and control of excessive or undue inflows to these systems is specifically addressed by several novel criteria and metrics. The proposed PAS should be adapted by each utility to be aligned with the objectives of the organisation and with the implemented asset management strategy. The proposed approach and the resulting consolidated PAS are thoroughly described. Results from the application of the PAS to several Portuguese utilities are discussed. This PAS aims at contributing to a reliable and replicable process to assess energy efficiency in wastewater systems and to encourage a more rational energy management.

scholarly journals A performance indicators system for urban wastewater treatment plants

2010 ◽  
Vol 62 (10) ◽  
pp. 2398-2407 ◽  
Author(s):  
Sílvia Quadros ◽  
Maria João Rosa ◽  
Helena Alegre ◽  
Catarina Silva
Keyword(s):  
Wastewater Treatment ◽  
Performance Indicators ◽  
Wastewater Treatment Plants ◽  
Cost Effective ◽  
Assessment System ◽  
Urban Wastewater ◽  
Performance Assessment System ◽  
Overall Performance ◽  
Urban Wastewater Treatment ◽  
A Performance

A performance assessment system (PAS) is an important instrument to provide a cost-effective and sustainable management of wastewater treatment plants (WWTPs). Despite the fact that many PASs have been developed in recent years, important aspects of WWTP evaluation have not yet been considered. This paper presents the framework and the overall performance indicators of a PAS developed for urban WWTPs.

Aligning Asset Management and Process Strategies at Wastewater Treatment Plants

2016 ◽  
Vol 2016 (9) ◽  
pp. 305-314
Author(s):  
Vincent Morello ◽  
Eric Antmann ◽  
George A Brown ◽  
Janeen Wietgrefe
Keyword(s):  
Wastewater Treatment ◽  
Asset Management ◽  
Wastewater Treatment Plants

scholarly journals The capacity of wastewater treatment plants drives bacterial community structure and its assembly

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Young Kyung Kim ◽  
Keunje Yoo ◽  
Min Sung Kim ◽  
Il Han ◽  
Minjoo Lee ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Community Structure ◽  
Bacterial Community ◽  
Activated Sludge ◽  
Community Assembly ◽  
Bacterial Communities ◽  
Wastewater Treatment Plants ◽  
High Capacity ◽  
Operating Conditions ◽  
Rrna Gene

Abstract Bacterial communities in wastewater treatment plants (WWTPs) affect plant functionality through their role in the removal of pollutants from wastewater. Bacterial communities vary extensively based on plant operating conditions and influent characteristics. The capacity of WWTPs can also affect the bacterial community via variations in the organic or nutrient composition of the influent. Despite the importance considering capacity, the characteristics that control bacterial community assembly are largely unknown. In this study, we discovered that bacterial communities in WWTPs in Korea and Vietnam, which differ remarkably in capacity, exhibit unique structures and interactions that are governed mainly by the capacity of WWTPs. Bacterial communities were analysed using 16S rRNA gene sequencing and exhibited clear differences between the two regions, with these differences being most pronounced in activated sludge. We found that capacity contributed the most to bacterial interactions and community structure, whereas other factors had less impact. Co-occurrence network analysis showed that microorganisms from high-capacity WWTPs are more interrelated than those from low-capacity WWTPs, which corresponds to the tighter clustering of bacterial communities in Korea. These results will contribute to the understanding of bacterial community assembly in activated sludge processing.

scholarly journals Biological Nutrient Removal Model No. 2 (BNRM2): a general model for wastewater treatment plants

2013 ◽  
Vol 67 (7) ◽  
pp. 1481-1489 ◽  
Author(s):  
R. Barat ◽  
J. Serralta ◽  
M. V. Ruano ◽  
E. Jiménez ◽  
J. Ribes ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Nitrogen Removal ◽  
Nutrient Removal ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Operating Conditions ◽  
Plant Performance ◽  
Biological Nutrient Removal ◽  
Nitrite Oxidizing Bacteria ◽  
Removal Model

This paper presents the plant-wide model Biological Nutrient Removal Model No. 2 (BNRM2). Since nitrite was not considered in the BNRM1, and this previous model also failed to accurately simulate the anaerobic digestion because precipitation processes were not considered, an extension of BNRM1 has been developed. This extension comprises all the components and processes required to simulate nitrogen removal via nitrite and the formation of the solids most likely to precipitate in anaerobic digesters. The solids considered in BNRM2 are: struvite, amorphous calcium phosphate, hidroxyapatite, newberite, vivianite, strengite, variscite, and calcium carbonate. With regard to nitrogen removal via nitrite, apart from nitrite oxidizing bacteria two groups of ammonium oxidizing organisms (AOO) have been considered since different sets of kinetic parameters have been reported for the AOO present in activated sludge systems and SHARON (Single reactor system for High activity Ammonium Removal Over Nitrite) reactors. Due to the new processes considered, BNRM2 allows an accurate prediction of wastewater treatment plant performance in wider environmental and operating conditions.

Developments in the Rorschach Assessment of Disordered Thinking and Communication

2021 ◽  
Vol 42 (2) ◽  
pp. 265-280 ◽  
Author(s):  
James H. Kleiger ◽  
Joni L. Mihura
Keyword(s):  
Performance Assessment ◽  
Assessment System ◽  
Empirical Validity ◽  
Rorschach Performance Assessment System ◽  
Valuable Method ◽  
Performance Assessment System

Abstract. In its first 100 years, the Rorschach has been heralded as a valuable method for investigating disturbances in thought organization and reasoning. It has survived periods of intense scrutiny and criticism, as contemporary researchers continued to demonstrate the empirical validity of the Rorschach as a measure of disordered thinking ( Mihura et al., 2013 ). It is fitting to mark the centenary of Rorschach’s “experiment” by summarizing contemporary contributions of the Rorschach Performance Assessment System (R-PAS) and reviewing the empirical and conceptual bases for using the inkblots to assess disordered thinking and communication.

scholarly journals Enhanced Performance Assessment System (EPAS) for carbon sequestration.

2010 ◽  
Author(s):  
Yifeng Wang ◽  
Amy Cha-Tien Sun ◽  
Jerry A. McNeish ◽  
Thomas A. Dewers ◽  
Teklu Hadgu ◽  
...  
Keyword(s):  
Carbon Sequestration ◽  
Performance Assessment ◽  
Assessment System ◽  
Performance Assessment System
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