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  • 1
    Electronic Resource
    Electronic Resource
    Attached-growth process engineering in wastewater treatment (2000)
    Springer
    Bioprocess engineering 23 (2000), S. 95-106 
    Details
    ISSN: 0178-515X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract  In view of the importance of biological treatment, it is the purpose of this work to present an overview of attached-growth biological wastewater treatment, considering the active role the engineers have to play in this field. This paper brings together conventional and advanced problems in the field of aerobic attached-growth (biofilm) wastewater treatment. Such an overview of biological wastewater treatment also precedes comments on some important aspects concerning the microorganisms responsible for wastewater treatment as well as considerations on the key factors governing the kinetic of the biological growth and waste treatment, together with application of fundamentals and kinetics to the analysis of these biological processes. A survey of the development of the attached-growth process and some modifications are given. These include additional details on the bioreactor progress and applications. Finally, some aspects regarding process intensification and bioreactor improvement were included.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004490050030
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Diskontinuierliche Polymerisation von Vinylchlorid in suspension mit Temperaturprogramm (1975)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 44 (1975), S. 141-149 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: The batch polymerization of vinyl chloride in suspension can be conducted with constant rate of polymerization up to very high degrees of conversion by means of a temperature programme. The temperature programme was determined from some conversion-time-curves of the batch polymerization of vinyl chloride at different temperatures. The molecular weight and the molecular weight distribution of the poly (vinyl chloride) produced with the temperature programme are in agreement with the calculated respectively expected values.
    Notes: Es wird über ein Verfahren zur Durchführung der diskontinuierlichen Suspensionspolymerisation von Vinylchlorid mit konstanter Polymerisationsgeschwindigkeit berichtet. Es besteht darin, daß die normalerweise sehr instationär verlaufende Polymerisation des Vinylchlorids mit Hilfe eines Temperaturprogramms durchgeführt wird. Das Temperaturprogramm läßt sich in einfacher Weise an Hand von einigen wenigen experimentell zu bestimmeneden Zeit-Umsatz-Kurven ermitteln. Molekulargewicht und Molekularge-wichtsverteilung des mit Temperaturprogramm erzeugten Polymeren stehen im Einklang mit den zu erwartenden Werten.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1975.050440112
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  • 3
    Electronic Resource
    Electronic Resource
    Application of a computer temperature program to the vinyl chloride batch suspension polymerization at constant rate (1977)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 64 (1977), S. 19-28 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die Durchführung der diskontinuierlichen Suspensionspolymerisation von Vinylchlorid mit konstanter Polymerisationsgeschwindigkeit mit Hilfe eines Temperaturprogramms wird beschrieben. Die Erstellung dieses Temperaturprogramms wurde mit Hilfe eines Computers durchgeführt wobei auf das von Hamielec et al. vorgeschlagene Modell zur Masse- und Suspensionspolymerisation von Vinylchlorid zurückgegriffen wird.
    Notes: The vinyl chloride batch suspension polymerization at constant polymerization rate governed by means of a temperature program, is presented.The method of establishing this temperature program by means of a digital computer, using the kinetic model proposed by Hamielec et al. for mass and suspension polymerization of vinyl chloride, is described.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1977.050640102
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  • 4
    Electronic Resource
    Electronic Resource
    Die Wirkung elektrischer Hochfrequenz-Entladungen auf Cellulose-, Polyester- und PolypropylenfasernHerrn Professor Dr. Dr. h. c. Hermann Klare zur Vollendung des 70. Lebensjahres gewidmet (1979)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 30 (1979), S. 241-244 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: The processes caused by electric high frequency discharges on cellulose, polyester and polypropylene fibres, as degradation, crosslinking, weight loss, change of molecular weight, and the changes in thermal and mechanical properties have been investigated in dependence on the experimental conditions. The macroradicals formed in the fibre provide, in the presence of monomers, the basis of the synthesis of graft polymers, since the fibres treated by high frequency discharge include activated backbone chains.
    Notes: Die bei der Einwirkung elektrischer HF-Entladungen auf Cellulose-, Polyester- und Polypropylenfasern ablaufenden Prozesse, wie Abbau- und Vernetzungsreaktionen, Masseverlust, änderung der relativen Molekülmasse sowie der thermischen und mechanischen Eigenschaften, werden in Abhängigkeit von den Behandlungsbedingungen untersucht. Die in den Fasern entstehenden Makroradikale bilden bei Anwesenheit von Monomeren die Grundlage zur Synthese von Pfropfcopolymeren, wobei die HF-behandelten Fasern als aktivierte Trägerpolymere dienen.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1979.010300504
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  • 5
    Electronic Resource
    Electronic Resource
    Synthesis of some amino acids, sugars, and peptides in cold plasma. Electron-microscopic studies on some proteid forms (III) (1973)
    New York : Wiley-Blackwell
    Biopolymers 12 (1973), S. 237-241 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Electron-microscopic studies of some proteid structures (synthesized in RF electrical discharge) and corresponding individual compounds resulting from acid hydrolysis were investigated. Some superior precellular structures with peptide linkages in cold plasma conditions were observed.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1973.360120204
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  • 6
    Electronic Resource
    Electronic Resource
    Process engineering in biological aerobic waste-water treatment (1999)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 19 (1999), S. 111-145 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: A non-comprehensive review of several technical developments in the field of aerobic biological waste-water treatment engineering is carried out, considering the active role the engineers have to play in this field. This paper brings together conventional and advanced problems in the field of aerobic biological waste-water treatment.Such an overview of biological waste-water treatment also precedes comments on some important aspects concerning the microorganisms responsible for waste-water treatment as well as considerations of the application of fundamentals and kinetics to the analysis of the biological processes used most commonly for aerobic biological waste-water treatment.A survey of the development of the biological activated-sludge process and some modifications are given. Some problems implied in the conventional activated-sludge waste-water treatment are analyzed, considering conventional processes and bioreactor models (the continuous stirred-tank reactor model and the plug-flow reactor models of the activated-sludge process) as well as aerated lagoons.Further, modifications of the activated-sludge process are presented. These include additional details on the bioreactor progress and applications, with emphasis on aspects concerning airlift bioreactors and their variants, deep-shaft bioreactors and reciprocating jet bioreactors which are considered as the third generation of bioreactors owing to their important advantages in design, operation and performance in waste-water treatment. Sequencing-batch reactors and aerobic digestion processes, including conventional aerobic digestion, high-purity oxygen digestion, thermophilic aerobic digestion and cryophylic aerobic digestion are also reviewed.Finally, some aspects regarding the operational factors that are involved in the selection of the reactor type are included.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370190205
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  • 7
    Electronic Resource
    Electronic Resource
    Pfropfen von Synthesefasern mit Acrylamid im kalten Hocfrequenzplasma (1981)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 32 (1981), S. 715-718 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: By the action of active plasma species, particularly electron, polymerization and grafting of acrylamide deposed in thin layers on fibres is achieved. the formation of graft copolymres on polyester and polypropylene fibres was detected by IR spectroscopy and themoxydative degradation. The modified fibres are characterized by higher water regain and improved mechanical properties.
    Notes: Unter der Einwirkung aktiver Plasmaspezies, insbeondere von Elektronen, erfolgen Polymerisation und Pfropfung von Acrylamid, das sich in dünner Schict auf Trägerfasern Befindet. Die Bildung von Pfropfcopolymeren von Polyester- und Polypropylenfasern wurde durch IR-Spektralanalyse und durch das Verhalten beim thermooxidativen Abbau nachgewiesen. Die modifizierten Fasern weisen eine verbesserte Wasseraufnahme und gute physikalischmechanische Eigenschaften auf.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1981.010321109
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Polymerization of some potential „grafting-monomers“ for natural and synthetic fibres in cold plasma conditions (1982)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 33 (1982), S. 26-30 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die Polymerisation in fester Phase von einigen potentiellen Pfropfmonomeren für natürliche und synthetische Fasern (Acrylamid, Benzidin, alpha-Naphthylamin) unter der Einwirkung eines Plasmas wurde untersucht. Auf der Grundlage analytischer Messungen an den erhaltenen Polymeren (IR-, NMR-, ESR-Spektroskopie, Elementaranalyse, Gelfiltration, Quellung und DTA) wird ein Polymerisationsmechanismus vorgeschlagen.
    Notes: Plasma induced solid-state polymerization of some potential „grafting-monomers“ (acrylamide, benzidine and alphanaphthylamine) for natural and synthetic fibres has been studied. Polymerization mechanisms have been suggested on the basis of the analytical data (IR, NMR, ESR spectroscopy, elemental analysis, gel-filtration, swelling properties, DTA measurements) of the polymers obtained in cold plasma conditions.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1982.010330105
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