Process system engineering in wastewater treatment process

Yoo, Chang Kyoo; Kim, Dong Soon; Cho, Ji-Hoon; Choi, Sang Wook; Lee, In‐Beum

doi:10.1007/bf02698284

Cited by 23 publications

(16 citation statements)

References 93 publications

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“…Many control strategies such as dissolved oxygen control, sludge inventory control, respirometry-based control and advanced nutrient removal control, have been proposed in this process [12]. However, it is difficult to evaluate and compare these methods, partly due to the variability of the influent, the complexity of the biological and hydrodynamic phenomena, the large range of lime constants (from a few minutes to several days, even weeks), and the lack of standard evaluationa1 criteria.…”

Section: Description Of the Bsm1mentioning

confidence: 99%

Performance assessment of cascade controllers for nitrate control in a wastewater treatment process

Liu

2011

Korean J. Chem. Eng.

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A cascade control strategy is proposed to the benchmark simulation model 1 (BSM1) to enhance the treatment performance of nitrogen removal in a biological wastewater treatment plant. The proposed control approach consists of two control loops, a primary outer loop and a secondary inner loop. The method has two controllers of which the primary loop has a model predictive control (MPC) controller and the secondary loop has a proportional-integralderivative (PID) controller, which is a cascade MPC-PID controller. The primary MPC controller is to control the nitrate concentration in the effluent, and the secondary PID controller is to control the nitrate concentration in the final anoxic compartment. The proposed method controls the nitrate concentrations in the effluent as well as in the final anoxic reactor simultaneously to strictly satisfy the quality of the effluent as well as to remove the effects of disturbances more quickly by manipulating the external carbon dosage rate. Because the control performance assessment (CPA) technique has the features of determining the capability of the current controller and locating the best achievable performance, the other novelty of this paper is to suggest a relative closed-loop potential index (RCPI) which updates the CPA technology into a closed-loop cascade controller. The proposed method is compared with a cascade PID-PID control strategy and the original PID controller in BSM1 and an improved performance of the suggested cascade MPC-PID controller is obtained by using the CPA approach.

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Section: Description Of the Bsm1mentioning

confidence: 99%

Performance assessment of cascade controllers for nitrate control in a wastewater treatment process

Liu

2011

Korean J. Chem. Eng.

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“…many components, kinetic and stoichiometric parameters etc.) [3]. Therefore, the key parameters influencing the removal efficiency must be well selected, prediction model efficiency and sensitivity analysis improved, because it is difficult to simultaneously consider all selected variables when is predicting the results at the same time.…”

Section: Virtual Reality Application Simulationmentioning

confidence: 99%

“…Environmental systems engineering (ESE), as an interdisciplinary field, is based on environmental modeling and process optimization focused on solving the environmental pollution problems by optimizing the existing processes or services with minimal costs (i.e. increasing treatment capacities of wastewater treatment plants with min 10 % -30 % by optimizing instrumentation, control and automation of treatment processes thus saving of 6 % -10 % from operating costs, and remarkably shorting payback times, or adapting it to new changes, or equipment/installations in treatment processes working at optimal operational parameters and regime with minimal costs) [3]. A general schematic representation of ESE concept, particularly applied for a wastewater treatment system, is illustrated in Figure 1 [1].…”

Section: Introductionmentioning

confidence: 99%

Environmental System Engineering (Ese): Modeling and Optimization of a Textile Effluent Discoloration Process by Sorption

Zaharia¹

2015

JESR

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Nowadays, an interdisciplinary field of engineering that focuses on analytical and/or empirical models represented by mathematical, data-driven and biotic structures combined with physical, biological and ecological processes in water, air and eco-systems is developing, i.e. environmental system engineering (ESE). In this system, environmental modeling and process optimization acts together for solving problems with environmental systems, especially for minimizing pollution, or eco-toxicological effects. The present paper proposes the study of modeling and optimization of an environmental system (i.e. textile wastewater treatment system based on sorption onto indigene peat) for its discoloration (consequently, decreasing of color, organic and inorganic loads of effluent discharged in aquatic receptor, or inside reused). All performed laboratory tests consisted in 22 hours-sorption experiments onto peat applied for a real colored textile effluent, organized with respecting of an empirical planning by a central active composite rotatable 23 order design, considering as independent variables the peat dose (X1), pH (X2), and temperature (X3), and as optimization criterion, or decision function, the discoloration degree, or color removal (Y, [%]). The mathematical model was found adequate for the textile wastewater treatment, and the optimal operational conditions for highest discoloration efficiency were proposed.

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“…In the fields of wastewater treatment planning in urban and peri-urban areas of economically developing and middle-developed countries, many researchers have conducted academic and practical purpose research over several decades [1]. Wastewater treatment management and planning is usually conducted with a primary requirement of effluent quality [2] and systematic considerations on the wastewater treatment systems have been conducted in developed countries [3]. Other aspects including economic, institutional and political, climatic, environmental, land availability-properties, sociocultural and other-local aspects are secondary considerations, and lastly cost effectiveness is pursued.…”

Section: Introductionmentioning

confidence: 99%

Not Too Little, Not Too Much and Shortcut: A Review on the Effectualness of Per Capita Pollutant Discharge Indicators

Tsuzuki¹

2014

Int J Waste Resources

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In the fields of wastewater treatment planning, institutional and governance aspects are sometimes emphasised in developing and middle-developed countries. This paper summarises some important technical issues for the stakeholders of municipal wastewater treatment and water environment management. Pollutant removal efficiencies at wastewater treatment plants (WWTPs) are important but effluent water quality is sometimes emphasised. To achieve high pollutant removal efficiencies, maintaining a certain level of pollutant concentrations in the influent, or "Not Too Little" pollutant, is necessary. The second point is pollutant discharge from the river catchment should be "Not Too Much". Excess and rapid pollutant discharge increase in the catchment results in high costs and lengthy time periods for the river water environment to recover the original water environment conditions. The third point is that developing and middle-developed countries can use a "shortcut" or technological bypass by use of existing hard and soft measures to facilitate environmental improvements. This can be done with appropriate financial mechanisms. Pollutant discharge per capita (PDC) and pollutant load per capita flowing into water body (PLC wb) are effective and efficient indicators that can be used to address these three concepts.

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Process system engineering in wastewater treatment process

Cited by 23 publications

References 93 publications

Performance assessment of cascade controllers for nitrate control in a wastewater treatment process

Performance assessment of cascade controllers for nitrate control in a wastewater treatment process

Environmental System Engineering (Ese): Modeling and Optimization of a Textile Effluent Discoloration Process by Sorption

Not Too Little, Not Too Much and Shortcut: A Review on the Effectualness of Per Capita Pollutant Discharge Indicators

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