Cost Optimization of Wastewater Treatment Plant Design Preliminary Design Including Sludge Disposal

1980 ◽  
Vol 15 (2) ◽  
pp. 121-142 ◽  
Author(s):  
R.M. Narbaitz ◽  
B.J. Adams
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
Random Search ◽  
Cost Optimization ◽  
Treatment Plant ◽  
Design Procedure ◽  
Treatment System ◽  
Water Quality Parameter ◽  
Preliminary Design ◽  
Plant Design

Abstract A computer based design methodology was developed to facilitate and improve the preliminary design of wastewater treatment plants. It aids design by choosing the least cost treatment system (including sludge treatment and disposal) which meets all the constraints of the particular application. This methodology not only chooses the best alternative treatment system among numerous alternatives but also finds the optimal values of the independent design variables of the processes forming the optimal treatment system. In addition, it has two advantages over currently available design methodologies in that it optimizes wastewater treatment design with respect to the removal of more than one water quality parameter and it considers that sludges produced by different processes have different qualities. This methodology is based on a nonlinear programming method termed optimization by random search and systematic reduction of the size of search region. The design procedure was used to analyze a particular example problem.

Research on Variable Metric Chaos Optimization Modeling for the Prediction of Wastewater Treatment Plants Performance

2012 ◽  
Vol 428 ◽  
pp. 169-175
Author(s):  
Guo Kai Fu ◽  
Yi Yue Hu ◽  
Zhi Zhang
Keyword(s):  
Neural Network ◽  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Treatment System ◽  
Variable Metric ◽  
Chaos Optimization ◽  
Actual Operation ◽  
The Stability

A reliable model for any wastewater treatment plant is essential in order to provide a tool for predicting its performance and to form a basis for controlling the operation of the process. This would minimize the operation costs and assess the stability of environmental balance. For the multi-variable, uncertainty, non-linear characteristics of the wastewater treatment system, a variable metric chaos optimization neural network (VMCNW) prediction model is established standing on the actual operation data in the wasterwater treatment system. The model overcomes several disadvantages of the conventional BP neural network. Namely:slow convergence, low accuracy and difficulty in finding the global optimum.The results of model calculation show that the predicted value can better match measured value,played a effect of simulating and predicting and be able to optimize the operation status. The establishment of the predicting model provide a simple and practical way for the operation and management in wastewater treatment plant,and have good research and engineering practical value.

Anaerobic digestion: impact of future greenhouse gases mitigation policies on methane generation and usage

2005 ◽  
Vol 52 (1-2) ◽  
pp. 39-47 ◽  
Author(s):  
P.F. Greenfield ◽  
D.J. Batstone
Keyword(s):  
Nitrous Oxide ◽  
Wastewater Treatment ◽  
Greenhouse Gases ◽  
Greenhouse Gas ◽  
Wastewater Treatment Plants ◽  
Carbon Tax ◽  
Treatment Plant ◽  
Greenhouse Gas Mitigation ◽  
Plant Design ◽  
Ghg Mitigation

The debate as to whether carbon dioxide, methane, nitrous oxide and other greenhouse gas emissions will become subject to increasing regulation, increased restrictions, and probably to some form of carbon tax, has moved from a simple “yes” or “no” to “when”. Wastewater treatment plants will be significantly impacted by increased energy costs and by specific regulations and/or penalties associated with emissions of methane and nitrous oxide. In this paper, the greenhouse gases emissions of different wastewater process options are estimated. The paper outlines the increasing need for wastewater treatment plants to factor greenhouse gas mitigation issues into their medium- as and long-term strategies, and identifies anaerobic enhouse as processes as being at the core of such strategies. Further, the paper identifies a number of key research challenges to be addressed if such strategies are to play a larger role in attenuating the likely impacts of GHG mitigation requirements on wastewater treatment plant design and operation.

Integrated design of sewers and wastewater treatment plants

2002 ◽  
Vol 46 (9) ◽  
pp. 11-20 ◽  
Author(s):  
J. Vollertsen ◽  
T. Hvitved-Jacobsen ◽  
Z. Ujang ◽  
S.A. Talib
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Integrated Design ◽  
Cost Effective ◽  
Wastewater Management ◽  
Plant Design ◽  
Sewer System ◽  
Process Simulations

Sewer system design must be integrated with wastewater treatment plant design when moving towards a more sustainable urban wastewater management. This integration allows an optimization of the design of both systems to achieve a better and more cost-effective wastewater management. Hitherto integrated process design has not been an option because the tools to predict in-sewer wastewater transformations have been inadequate. In this study the WATS model - being a new and validated tool for in-sewer microbial process simulations - is presented and its application for integrated sewer and treatment plant design is exemplified. A case study on a Malaysian catchment illustrates this integration. The effects of centralization of wastewater treatment and the subsequently longer transport distances are addressed. The layout of the intercepting sewer is optimized to meet the requirements of different treatment scenarios.

scholarly journals THE INFLUENCE OF AERATOR MOUNTING AND WASTEWATER TREATMENT PLANT DESIGN ON THE PERFORMANCE OF AERATION SYSTEMS

2010 ◽  
Vol 2 (5) ◽  
pp. 97-102
Author(s):  
Ala Sokolova ◽  
Mindaugas Rimeika
Keyword(s):  
Wastewater Treatment ◽  
Oxygen Transfer ◽  
Wastewater Treatment Plants ◽  
Oxygen Transfer Rate ◽  
Treatment Plant ◽  
Aeration Tank ◽  
Plant Design ◽  
Operational Parameters ◽  
Aeration System ◽  
The Impact

The paper analyzes the impact of the way of mounting a tube diffuser, the design of an aeration tank and the presence of a fixed carrier on the operational parameters of aeration systems used in small wastewater treatment plants. It was found out that the vertically mounted tube diffuser decreased standard oxygen transfer rate (SOTR) of the aeration system by approximately 20% and standard oxygen transfer efficiency (SOTE) by 25% comparing to the horizontally mounted tube diffuser. It was also defined that the design of the aeration tank might have an impact on the operation parameters of the aeration system: when the centre shell used to protect a diffuser was dismantled from a test tank, SOTR and SOTE increased by approximately 20%. It was also established that the presence of the fixed carrier in the aeration tank did not have an impact on the performance of aeration systems. Finally, research was carried out to compare the operational parameters of two diffusers of different types offered on the market and used in small wastewater treatment plants. It was found out that the performance different type diffusers might vary considerably.

scholarly journals Environmental Improvement of Alexandria’s Wastewater Treatment Plants Using Life Cycle Assessment Approach

2013 ◽  
Vol 14 (4) ◽  
pp. 450-459 ◽  
Keyword(s):  
Wastewater Treatment ◽  
Life Cycle Assessment ◽  
Life Cycle ◽  
Wastewater Treatment Plants ◽  
Current System ◽  
Treatment Plant ◽  
Current Treatment ◽  
Treatment System ◽  
Treatment Efficiency ◽  
Combined System

Improving the treatment efficiency of a primary wastewater treatment plant(WWTP),in Alexandria, Egypt,was studied.In order to improve the treatment efficiency of the plant, different improving scenarios were proposed and evaluated. The improvement scenarios are: scenario 1,use of engineered wetland instead of the current treatment system, scenario 2, use of the engineered wetland as a secondary treatment after the existing treatment system and scenario 3,replace the existing treatment system with a secondary WWTP. The scope of this study is to environmentally assess the existing primary WWTP, in addition to assess the possibility of using the engineered wetland for improving the primary WWTP. To evaluate the performance of each treatment system, Life Cycle Assessment (LCA) approach was applied. Based on the results, the main improvement achieved in all the scenarios is in the category of eutrophication and acidification, as the three scenarios have higher removal efficiency for the nutrients than the current system. Unlike the total reduction in the environmental impact, scenario 3 gave the highest reduction in the category of eutrophication and acidification (25%) followed by scenario 2 (24%) and the lowest reduction achieved by scenario 1 (13%). The analysis revealed that the use of combined system from natural and traditional systems (scenario 2) is the best scenario. However, scenario3 achieved a very close result.

scholarly journals Collaborative Control Applied to BSM1 for Wastewater Treatment Plants

Processes ◽  
2020 ◽  
Vol 8 (11) ◽  
pp. 1465 ◽  
Author(s):  
Keidy Morales-Rodelo ◽  
Mario Francisco ◽  
Hernan Alvarez ◽  
Pastora Vega ◽  
Silvana Revollar
Keyword(s):  
Mass Transfer ◽  
Wastewater Treatment ◽  
Control Structure ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Hankel Matrix ◽  
Design Procedure ◽  
Transfer Model ◽  
Collaborative Control ◽  
Predictive Controller

This paper describes a design procedure for a collaborative control structure in Plant Wide Control (PWC), taking into account the existing controllable parameters as a novelty in the procedure. The collaborative control structure includes two layers, supervisory and regulatory, which are determined according to the dynamics hierarchy obtained by means of the Hankel matrix. The supervisory layer is determined by the main dynamics of the process and the regulatory layer comprises the secondary dynamics and controllable parameters. The methodology proposed is applied to a wastewater treatment plant, particularly to the Benchmark Simulation Model No 1 (BSM1) for the activated sludge process, comparing the results with the use of a Model Predictive Controller in the supervisory layer. For determining controllable parameters in the BSM1 control, a new specific oxygen mass transfer model in the biological reactor has been developed, separating the kLa volumetric mass transfer coefficient into two controllable parameters, kL and a.

Upgrading of a small wastewater treatment plant: design and operation aspects

1995 ◽  
Vol 32 (7) ◽  
pp. 111-117
Author(s):  
G. J. Hatziconstantinou ◽  
C. M. Kalergis ◽  
A. P. Grivas
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Plant Performance ◽  
Process Efficiency ◽  
Plant Design ◽  
Settling Behaviour ◽  
Plant Restoration ◽  
Sludge Settling

This paper presents the case of a small wastewater treatment plant taken out of service due to insufficient design and equipment installed. Design assumptions and decisions made for plant restoration based on treatment requirements are outlined and plant operation aspects regarding revealed wastewater characteristics, process efficiency, sludge settling behaviour and equipment control, are discussed. The importance of wastewater characterization as a necessary procedure prior to plant design and construction, is stressed and the feasibility of nutrient removal in small wastewater treatment plants under minimum supervision, is assessed. A simplified mathematical model, as a useful tool to operators, for plant performance evaluation and prediction, is presented.

Analysis and balance of phosphorous removal from wastewater at urban wastewater treatment plant

2020 ◽  
Vol 15 (2) ◽  
pp. 142-151
Author(s):  
Peter Lukac ◽  
Lubos Jurik
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Wastewater Treatment Plants ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Phosphorus Recovery ◽  
Anaerobic Sludge ◽  
Biological Phosphorus Removal ◽  
The Mean

Abstract:Phosphorus is a major substance that is needed especially for agricultural production or for the industry. At the same time it is an important component of wastewater. At present, the waste management priority is recycling and this requirement is also transferred to wastewater treatment plants. Substances in wastewater can be recovered and utilized. In Europe (in Germany and Austria already legally binding), access to phosphorus-containing sewage treatment is changing. This paper dealt with the issue of phosphorus on the sewage treatment plant in Nitra. There are several industrial areas in Nitra where record major producers in phosphorus production in sewage. The new wastewater treatment plant is built as a mechanicalbiological wastewater treatment plant with simultaneous nitrification and denitrification, sludge regeneration, an anaerobic zone for biological phosphorus removal at the beginning of the process and chemical phosphorus precipitation. The sludge management is anaerobic sludge stabilization with heating and mechanical dewatering of stabilized sludge and gas management. The aim of the work was to document the phosphorus balance in all parts of the wastewater treatment plant - from the inflow of raw water to the outflow of purified water and the production of excess sludge. Balancing quantities in the wastewater treatment plant treatment processes provide information where efficient phosphorus recovery could be possible. The mean daily value of P tot is approximately 122.3 kg/day of these two sources. The mean daily value of P tot is approximately 122.3 kg/day of these two sources. There are also two outflows - drainage of cleaned water to the recipient - the river Nitra - 9.9 kg Ptot/day and Ptot content in sewage sludge - about 120.3 kg Ptot/day - total 130.2 kg Ptot/day.

Sludge minimization by disintegration at different wastewater treatment plants

2008 ◽  
Vol 3 (1) ◽  
Author(s):  
Luchien Luning ◽  
Paul Roeleveld ◽  
Victor W.M. Claessen
Keyword(s):  
Organic Matter ◽  
Wastewater Treatment ◽  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
New Technologies ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Biological Degradation ◽  
Ongoing Research ◽  
Sludge Minimization

In recent years new technologies have been developed to improve the biological degradation of sewage sludge by anaerobic digestion. The paper describes the results of a demonstration of ultrasonic disintegration on the Dutch Wastewater Treatment Plant (WWTP) Land van Cuijk. The effect on the degradation of organic matter is presented, together with the effect on the dewatering characteristics. Recommendations are presented for establishing research conditions in which the effect of sludge disintegration can be determined in a more direct way that is less sensitive to changing conditions in the operation of the WWTP. These recommendations have been implemented in the ongoing research in the Netherlands supported by the National Institute for wastewater research (STOWA).

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