|
|
Treatment of Waste Water Treatment Sludge Prior of its Following Utilization
Pěček, Jan ; Klemeš,, Jiří (referee) ; Žaloudík, Petr (referee) ; Jícha, Jaroslav (advisor)
Industrial production of cellulose is an energy intensive process. Businesses aim to utilized as much input energy, materials as possible while minimizing the waste as well. In addition to the main product – cellulose and large amounts of organically polluted water which is subsequently treated in waste water treatment plants. This PhD thesis deals with formation of suitable mixing formula for sludge from cellulose production and available materials (waste) from close neighborhood of Biocel Paskov a.s. so that well balanced cofermentation products are achieved. This mainly involves grass from lawn maintenance, grass ensilage, potato peels, and leftovers from vegetable processing. Fermentation processes (both mesophilic and thermophilic) of prepared fermentation products were conducted in semi-continuous and continuous laboratory fermentation units. Reduction of organic mass depending on residence time was closely observed as well as production and quality of biogas along with quality of output digestate. Course of process behaviour under controlled pH was tested. Results of particular tests were integrated into graphs. Conclusion of the thesis presents balance scheme drawn for selected variants, and design of real fermentation station with individual buildings, operations, basic machinery and equipment description including investment costs. Financial calculation and expected investment return was conducted in two variants – without subsidies and including subsidies from Operational Programme Renewable Sources of Energy.
|
|
|
The rate of repeated capture and release of water by a mixed recyclate of disposable diapers and its individual components
Březinová, Štěpánka ; Ondreáš, František (referee) ; Jančář, Josef (advisor)
This bachelor’s thesis focuses on the recycling of disposable diapers. The waste from disposable diapers could be potentially used again and it is also a more ecological solution than incineration of this waste. The process of recycling separates individual parts of the diaper so they could be used again. In this bachelor’s thesis, the product of recycling is a recycled material that is composed of cellulose and sodium polyacrylate. Sodium polyacrylate is one of the superabsorbent polymers that have great absorptive qualities. The resulting recycled material has the same qualities as well. In the experimental part of this bachelor’s thesis, the recycled material is analyzed and the absorptive and desorptive qualities are compared with the qualities of sodium polyacrylate.
|
|
|
The rate of repeated capture and release of water by a mixed recyclate of disposable diapers and its individual components
Březinová, Štěpánka ; Ondreáš, František (referee) ; Jančář, Josef (advisor)
This bachelor’s thesis focuses on the recycling of disposable diapers. The waste from disposable diapers could be potentially used again and it is also a more ecological solution than incineration of this waste. The process of recycling separates individual parts of the diaper so they could be used again. In this bachelor’s thesis, the product of recycling is a recycled material that is composed of cellulose and sodium polyacrylate. Sodium polyacrylate is one of the superabsorbent polymers that have great absorptive qualities. The resulting recycled material has the same qualities as well. In the experimental part of this bachelor’s thesis, the recycled material is analyzed and the absorptive and desorptive qualities are compared with the qualities of sodium polyacrylate.
|
|
|
Treatment of Waste Water Treatment Sludge Prior of its Following Utilization
Pěček, Jan ; Klemeš,, Jiří (referee) ; Žaloudík, Petr (referee) ; Jícha, Jaroslav (advisor)
Industrial production of cellulose is an energy intensive process. Businesses aim to utilized as much input energy, materials as possible while minimizing the waste as well. In addition to the main product – cellulose and large amounts of organically polluted water which is subsequently treated in waste water treatment plants. This PhD thesis deals with formation of suitable mixing formula for sludge from cellulose production and available materials (waste) from close neighborhood of Biocel Paskov a.s. so that well balanced cofermentation products are achieved. This mainly involves grass from lawn maintenance, grass ensilage, potato peels, and leftovers from vegetable processing. Fermentation processes (both mesophilic and thermophilic) of prepared fermentation products were conducted in semi-continuous and continuous laboratory fermentation units. Reduction of organic mass depending on residence time was closely observed as well as production and quality of biogas along with quality of output digestate. Course of process behaviour under controlled pH was tested. Results of particular tests were integrated into graphs. Conclusion of the thesis presents balance scheme drawn for selected variants, and design of real fermentation station with individual buildings, operations, basic machinery and equipment description including investment costs. Financial calculation and expected investment return was conducted in two variants – without subsidies and including subsidies from Operational Programme Renewable Sources of Energy.
|
guest ::
