A scenario-based multiple attribute decision-making approach for site selection of a wastewater treatment plant: Bahir Dar City (Ethiopia) case study

The challenge of selecting an appropriate wastewater treatment plant (WWTP) site is addressed in this study, using the case study of Bahir Dar City, Ethiopia. An innovative approach is proposed for selecting the WWTP site. Fifteen practically feasible alternatives were identified based on the geographical information system (GIS) based hydraulic design and considering the overall economy of the system. The three dimensions of sustainability were considered while evaluatingalternatives through incorporating economic, social, energy and environmental criteria in decision-making. The multiple attribute decision making (MADM) method was applied to prioritize the alternatives. Four scenarios representing the different perspectives of choices were used for weight elicitation. The results of the study show that the developed decisionmaking approach identified practically feasible alternatives. The framework and decision-making methodology developed in this study helped to facilitate the decision making by local government in a holistic view that incorporates environmental management in the city of Bahir Dar.

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Predicting the sound power and impact of a wastewater treatment plant

Water Science & Technology ◽

10.2166/wst.2001.0775 ◽

2001 ◽

Vol 44 (2-3) ◽

pp. 235-242 ◽

Cited By ~ 3

Author(s):

B. De heyder ◽

P. Ockier ◽

R. Jansen ◽

R. Huiberts

Keyword(s):

Wastewater Treatment ◽

Empirical Model ◽

Wastewater Treatment Plant ◽

Treatment Plant ◽

Empirical Models ◽

Sound Power ◽

Water Line ◽

Model Derivation ◽

Close Distance

Several process units at a wastewater treatment plant (WWTP) can produce a significant level of sound and thus induce sound nuisance for nearby residents. The risk for sound nuisance should be considered by making a prognosis of sound impact in an early project phase (planning, design). A prognosis requires information with respect to the sound characteristics of the different process units. This paper reports the development of empirical models for the sound power of relevant process units in the water line at Aquafin WWTPs. The used methodology for model derivation and validation allowed us to minimize the required number of measurements. Besides the methodology, the paper describes in detail the derivation and validation of the empirical model for the splashing water of screw pumps. Also the use of all the derived empirical models to determine the sound impact of a wastewater treatment plant at close distance is illustrated with a case-study.

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Optimising dissolved air flotation/filtration treatment of algae-laden lagoon effluent using surface charge: a Bolivar treatment plant case study

Water Science & Technology ◽

10.2166/wst.2012.373 ◽

2012 ◽

Vol 66 (8) ◽

pp. 1684-1690 ◽

Cited By ~ 2

Author(s):

Russell Yap ◽

Michael Holmes ◽

William Peirson ◽

Michael Whittaker ◽

Richard Stuetz ◽

...

Keyword(s):

Wastewater Treatment ◽

Surface Charge ◽

Wastewater Treatment Plant ◽

Pilot Plant ◽

Treatment Plant ◽

Dissolved Air Flotation ◽

Air Flotation ◽

A Charge ◽

Dissolved Air

Dissolved air flotation (DAF) incorporating filtration (DAFF) is used at the Bolivar wastewater treatment plant (WWTP) to polish lagoon effluent for reuse. Elevated algal populations are frequently experienced and can lead to increased coagulant requirements and process control issues. Streaming current detectors (SCDs) and a charge demand analyser (CDA) were used to monitor the full-scale plant. This was followed by an optimisation study using a pilot plant with a CDA. It was found that the normal operational charge demand range for DAF at Bolivar was between −46 and −40 μeq L−1. Decreasing the pH of coagulation reduced coagulant consumption and facilitated more sensitive CDA responses to changes in alum dose.

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The effect of normalization norms in multiple attribute decision making models: a case study in gear material selection

Structural and Multidisciplinary Optimization ◽

10.1007/s00158-004-0473-1 ◽

2004 ◽

Vol 29 (4) ◽

pp. 312-318 ◽

Cited By ~ 133

Author(s):

A.S. Milani ◽

A. Shanian ◽

R. Madoliat ◽

J.A. Nemes

Keyword(s):

Decision Making ◽

Material Selection ◽

Multiple Attribute Decision Making ◽

Multiple Attribute ◽

Decision Making Models

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Aplikasi Penentuan Tunjangan Kinerja dan Rekomendasi Pegawai Universitas Singaperbangsa Karawang

JURNAL MEDIA INFORMATIKA BUDIDARMA ◽

10.30865/mib.v3i3.1187 ◽

2019 ◽

Vol 3 (3) ◽

pp. 191

Author(s):

Aldi Jakaria ◽

Ade Andri Hendriadi ◽

Nina Sulistiyowati

Keyword(s):

Decision Making ◽

Employee Performance ◽

Multiple Attribute Decision Making ◽

Development Life Cycle ◽

Multiple Attribute ◽

Waterfall Model ◽

Definition Of ◽

The University

Universitas Singaperbangsa Karawang does not yet have a system and criteria for assessing the performance of non-P3K employees. Currently the staffing office at the University of Singaperbangsa Karawang does not yet have a way to determine how an employee is entitled to a Performance Allowance. Based on these facts, a website-based employee performance allowance information system will be created with a case study of the staff of the singaperbangsa karawang university. The system to be built includes the definition of criteria, data processing to become the best employee recommendation / promotion and determination of Employee Performance Allowances. The methodology used is software engineering and uses the Software Development Life Cycle (SDLC) method with the waterfall model because it is in accordance with the research that will be carried out with a relatively short stage of system usage. The calculation process is done by using the method of fuzzy multiple attribute decision making with weighted product because this method determines the weight value for each attribute, then proceed with a ranking process that will select the best alternative from a number of alternatives. The system created can provide information about the amount of employee performance benefits and recommendations for promotion for employees. After evaluating the user, this system gets a response that is easy to understand and easy to understand on each menu on the system. Looking at the benefits of this system is useful when it will provide performance allowances to employees and at the time will determine the employees who are reconditioned for promotions. The design of employee recommendation decision support systems using fuzzy multiple attribute decision making is done by completing the weighted product to produce alternatives after verification with the existing data getting 60% accuracy.

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