MODELING AND CALCULATION OF WASTEWATER TREATMENT IN AEROTANK-MIXERS WITH SUSPENDED AND ATTACHED BIOCENOSIS USING NONLINEAR KINETICS OF MONO

Experimental investigations on the kinetics of wastewater treatment processes in biofilms were performed in a laboratory reactor. Parallel with the kinetic experiments, the influence of the biofilm kinetics on the biofilm structure was studied at macroscopic and microscopic levels. The close interrelationship between biofilm kinetics and structural changes caused by the kinetics is illustrated by several examples. From the study, it is evident that the traditional modelling of wastewater treatment processes in biofilm reactors based on substrate removal kinetics alone will fail in many cases, due to the inevitable changes in the biofilm structure not taken into consideration. Therefore design rules for substrate removal in biofilms used for wastewater treatment must include correlations between the removal kinetics and the structure and development of the biological film.

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Kinetics of organics removal in swine wastewater treatment using anaerobic moving bed biofilm reactor

10.5004/dwt.2021.26681 ◽

2021 ◽

Vol 212 ◽

pp. 112-120

Author(s):

Anh Van Ngo ◽

Oanh Hoang Thi Le ◽

Quan Truong Nguyen ◽

Hidenari Yasui ◽

Khai Manh Nguyen ◽

...

Keyword(s):

Wastewater Treatment ◽

Biofilm Reactor ◽

Swine Wastewater ◽

Moving Bed Biofilm Reactor ◽

Moving Bed ◽

Organics Removal ◽

Kinetics Of

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Affecting Factors and Kinetics of New Developed Symmetrical Spiral Stream Anaerobic Bioreactor (SSSAB) for Wastewater Treatment

International Proceedings of Chemical Biological and Environmental Engineering ◽

10.7763/ipcbee.2016.v96.7 ◽

2016 ◽

Vol 96 ◽

pp. 38-45 ◽

Cited By ~ 1

Author(s):

Awad Abdelgadir ◽

◽

Jianshe Liu ◽

Xiaoguang Chen ◽

Li Gang ◽

...

Keyword(s):

Wastewater Treatment ◽

Affecting Factors ◽

Anaerobic Bioreactor ◽

Kinetics Of

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Kinetics of sugar mill wastewater treatment by down-flow anaerobic fixed bed reactors

Bioprocess Engineering ◽

10.1007/bf00369432 ◽

1996 ◽

Vol 14 (3) ◽

pp. 145-150 ◽

Cited By ~ 3

Author(s):

E. S�nchez ◽

R. Borja ◽

L. Travieso

Keyword(s):

Wastewater Treatment ◽

Fixed Bed ◽

Sugar Mill ◽

Fixed Bed Reactors ◽

Kinetics Of

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The Effect of Electrolytes on the Photodegradation Kinetics of Caffeine

Catalysts ◽

10.3390/catal10060644 ◽

2020 ◽

Vol 10 (6) ◽

pp. 644

Author(s):

Pedro M. Rendel ◽

Giora Rytwo

Keyword(s):

Wastewater Treatment ◽

Ionic Strength ◽

Water Systems ◽

Process Efficiency ◽

Rate Coefficients ◽

Treatment Processes ◽

Kinetics Of ◽

Wastewater Effluents

Unsuccessfully treated by the existing wastewater-treatment processes, caffeine concentrations in wastewater effluents and natural reservoirs are constantly rising. Photodegradation treatment processes are drawing much attention due to their potential to oxidize and remove such, and similar contaminating compounds from treated waters. In continuation to our previous work on the photodegradation kinetics of caffeine in water by UV/H2O2 and UV/TiO2, this work evaluates the influence of various electrolytes, including NaCl, KCl, MgCl2, NaBr, and KBr, on the kinetics of the UV/H2O2 photodegradation of caffeine, aiming at estimating the efficiency of the method in more complex water systems. Results show that the efficiency of the UV/H2O2 photodegradation reactions is strongly affected by ionic strength and the presence of electrolytes in the solution. While chloride electrolytes were shown to optimize or reduce the process efficiency pending on their concentration. The sole presence of NaBr and KBr shows an immediate reduction in the efficiency of the photodegradation. Empirical apparent-rate-coefficients and curves describing the effect of the different electrolytes on the photodegradation kinetics of caffeine are presented.

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Investigation of interaction of particles of pollution and gas bulb in flotation of wastewater waters

E3S Web of Conferences ◽

10.1051/e3sconf/201913501032 ◽

2019 ◽

Vol 135 ◽

pp. 01032

Author(s):

Elena Nazimko ◽

Sergei Malko ◽

Anna Semenova ◽

Vladimir Dorovskoy

Keyword(s):

Wastewater Treatment ◽

Wastewater Treatment Plants ◽

Hydrophobic Surface ◽

Small Scale ◽

Discrete Elements ◽

Chemical Factors ◽

Flotation Method ◽

Physical And Chemical ◽

Kinetics Of ◽

Discrete Elements Method

The interaction of phases is at the basis of many technologies in different industries. Flotation method is used in wastewater treatment plants to capture and remove contaminants from wastewater. In this case, the interaction of air bubbles with particles of pollution with a hydrophobic surface. These interactions are very difficult to investigate because they are dynamic, subject to a large number of physical and chemical factors, and occur on a small scale. The processes mentioned above have traditionally been studied by laboratory experiments. These tests are tedious and time-consuming and show unsatisfactory accuracy. Analytical studies give idealized results. One of the most powerful alternatives for solving this problem is numerical modeling, which combines dynamics, accuracy and consideration of sophisticated details. This model is based on the discrete elements method. In this paper, a computer model for modeling the kinetics of the interaction of phases in wastewater treatment is considered.

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