Simulation and optimization of a coking wastewater biological treatment process by activated sludge models (ASM)

Abstract

Applications of activated sludge models (ASM) in simulating industrial biological wastewater treatment plants (WWTPs) are still difficult due to refractory and complex components in influents as well as diversity in activated sludges. In this study, an ASM3 modeling study was conducted to simulate and optimize a practical coking wastewater treatment plant (CWTP). First, respirometric characterizations of the coking wastewater and CWTP biomasses were conducted to determine the specific kinetic and stoichiometric model parameters for the consecutive aeration-anoxic-aeration (O-A/O) biological process. All ASM3 parameters have been further estimated and calibrated, through cross validation by the model dynamic simulation procedure. Consequently, an ASM3 model was successfully established to accurately simulate the CWTP performances in removing COD and NH4-N. An optimized CWTP operation condition could be proposed reducing the operation cost from 6.2 to 5.5 €/m(3) wastewater. This study is expected to provide a useful reference for mathematic simulations of practical industrial WWTPs.

Determination and Analysis of Kinetic Parameters of Heterotrophic Bacteria in Mathematical Simulation

“…The specific steps are used to take the appropriate volume of activated sludge and raw water mixed in a 1L sealed reactor, the occurrence of biochemical reactions, consumption of oxygen and produce CO 2 , CO 2 is loaded with 45% KOH solution of the CO 2 trap to absorb the pressure drop in the reactor. The pressure sensor detects this pressure change and turns on the power of the electrolysis unit, which produces oxygen to supplement the oxygen consumed by the reaction process and maintains the pressure balance inside and outside the reactor (Yang et al, 2016). The computer calculates the oxygen production of the electrolysis unit based on the amount of current and the turn-on time during the reaction, thereby obtaining the amount of oxygen consumed by the microorganisms in the test.…”

An improved ASM-GDA approach to evaluate the production kinetics of loosely bound and tightly bound extracellular polymeric substances in biological phosphorus removal process

“…11 Established earlier by the International Water Association (IWA), popularly used activated sludge models (ASMs) have provided researchers and practitioners with a standardized set of the mechanism model for the biological treatment processes. [12][13][14][15] Although researches on ASMs mathematical models have contributed to increasing knowledge in the BPR eld, 16,17 the reaction mechanism by incorporating and exploring the roles of TB-EPS and LB-EPS in BPR process in ASM models were not presented in literatures. To gain a better understanding of the role of EPS in the transformation and transportation of P in a dynamic biological-treatment model, kinetics model of the formation and hydrolysis of X TB-EPS and X LB-EPS being accompanied by new model parameters (new kinetic and stoichiometric parameters) are established in an improved ASM2 in this study.…”

Transformation and utilization of slowly biodegradable organic matters in biological sewage treatment of anaerobic anoxic oxic systems

“…However, differences in sewage composition cannot be described by COD. Currently, the Activated Sludge Models (ASMs) as suggested by the International Water Association are the most widely recognized methods for characterizing COD components (Ikumi et al, 2014;Wichern et al, 2006;Wu et al, 2016). The quantitative characterization of these components is required for the application of ASMs.…”