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Guidelines for Using Activated Sludge Models
295,00 CHF *
ggf. zzgl. Versand

Mathematical modelling of activated sludge systems is used widely for plant design, optimisation, training, controller design and research. The quality of simulation studies varies depending on the project objectives, finances and expertise available. Consideration has to be given to the model accuracy and the amount of time required to carry out a simulation study to produce the desired accuracy. Inconsistent approaches and insufficient documentation make quality assessment and comparison of simulation results difficult or almost impossible. A general framework for the application of activated sludge models is needed in order to overcome these obstacles. The genesis of the Good Modelling Practice (GMP) Task Group lies in a workshop held at the 4th IWA World Water Congress in Marrakech, Morocco where members of research groups active in wastewater treatment modelling came together to develop plans to synthesize the best practices of modellers from all over the world. The most cited protocols were included in the work: HSG (Hochschulgruppe), STOWA, BIOMATH and WERF. The goal of the group was to set up an internationally accepted framework to deal with the ASM type models in practice. This framework makes modelling more straightforward and systematic to use especially for practitioners and consultants. Additionally, it helps to define quality levels for simulation results, provides a procedure to assess this quality and assists in the proper use of the models. The framework describes a methodology for goal-oriented application of activated sludge models demonstrated by means of a concise guideline about the procedure of a simulation study and some illustrative case studies. Case studies give examples for the required data quality and quantity and the effort for calibration/validation with respect to a defined goal. Additional features in Guidelines for Using Activated Sludge Models include a chapter on modelling industrial wastewater, an overview on the history, current practice and future of activated sludge modelling and several explanatory case studies. It can be used as an introductory book to learn about Good Modelling Practice (GMP) in activated sludge modelling and will be of special interest for process engineers who have no prior knowledge of modelling or for lecturers who need a textbook for their students. The STR can also be used as a modelling reference book and includes an extended appendix with additional information and details of methodologies.

Anbieter: Orell Fuessli CH
Stand: 26.10.2020
Zum Angebot
F6F Hellcat Aces of VF-9
21,90 CHF *
zzgl. 3,50 CHF Versand

VF-9 was activated in March 1942 as part of Carrier Air Group (CAG) 9, one of the many air groups the US Navy was hurriedly forming in the aftermath of the Japanese attack on Pearl Harbor. Equipped with Grumman F4F Wildcats, VF-9 first saw combat during the Allied invasion of North Africa in November 1942, where the squadron engaged Vichy French fighters over Morocco. Returning to the United States, VF-9 became one of the first squadrons to receive the Grumman F6F Hellcat and to deploy on the USS Essex, the first of its class of fleet carriers that would form the backbone of the US Navy's Fast Carrier Task Force. VF-9, the Hellcat, and the Essex all entered combat in the fall of 1943. In the hands of the squadron's pilots, and with other Navy fighter squadrons, the Hellcat proved superior to the Imperial Japanese Navy's A6M Zero, which had heretofore been the world's premier carrier fighter plane.

Anbieter: Orell Fuessli CH
Stand: 26.10.2020
Zum Angebot
Guidelines for Using Activated Sludge Models
175,99 € *
ggf. zzgl. Versand

Mathematical modelling of activated sludge systems is used widely for plant design, optimisation, training, controller design and research. The quality of simulation studies varies depending on the project objectives, finances and expertise available. Consideration has to be given to the model accuracy and the amount of time required to carry out a simulation study to produce the desired accuracy. Inconsistent approaches and insufficient documentation make quality assessment and comparison of simulation results difficult or almost impossible. A general framework for the application of activated sludge models is needed in order to overcome these obstacles. The genesis of the Good Modelling Practice (GMP) Task Group lies in a workshop held at the 4th IWA World Water Congress in Marrakech, Morocco where members of research groups active in wastewater treatment modelling came together to develop plans to synthesize the best practices of modellers from all over the world. The most cited protocols were included in the work: HSG (Hochschulgruppe), STOWA, BIOMATH and WERF. The goal of the group was to set up an internationally accepted framework to deal with the ASM type models in practice. This framework makes modelling more straightforward and systematic to use especially for practitioners and consultants. Additionally, it helps to define quality levels for simulation results, provides a procedure to assess this quality and assists in the proper use of the models. The framework describes a methodology for goal-oriented application of activated sludge models demonstrated by means of a concise guideline about the procedure of a simulation study and some illustrative case studies. Case studies give examples for the required data quality and quantity and the effort for calibration/validation with respect to a defined goal. Additional features in Guidelines for Using Activated Sludge Models include a chapter on modelling industrial wastewater, an overview on the history, current practice and future of activated sludge modelling and several explanatory case studies. It can be used as an introductory book to learn about Good Modelling Practice (GMP) in activated sludge modelling and will be of special interest for process engineers who have no prior knowledge of modelling or for lecturers who need a textbook for their students. The STR can also be used as a modelling reference book and includes an extended appendix with additional information and details of methodologies.

Anbieter: Thalia AT
Stand: 26.10.2020
Zum Angebot
F6F Hellcat Aces of VF-9
17,99 € *
zzgl. 3,00 € Versand

VF-9 was activated in March 1942 as part of Carrier Air Group (CAG) 9, one of the many air groups the US Navy was hurriedly forming in the aftermath of the Japanese attack on Pearl Harbor. Equipped with Grumman F4F Wildcats, VF-9 first saw combat during the Allied invasion of North Africa in November 1942, where the squadron engaged Vichy French fighters over Morocco. Returning to the United States, VF-9 became one of the first squadrons to receive the Grumman F6F Hellcat and to deploy on the USS Essex, the first of its class of fleet carriers that would form the backbone of the US Navy's Fast Carrier Task Force. VF-9, the Hellcat, and the Essex all entered combat in the fall of 1943. In the hands of the squadron's pilots, and with other Navy fighter squadrons, the Hellcat proved superior to the Imperial Japanese Navy's A6M Zero, which had heretofore been the world's premier carrier fighter plane.

Anbieter: Thalia AT
Stand: 26.10.2020
Zum Angebot

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