Thesis (Ph. D.)--Virginia Polytechnic Institute and State University, 1989. / Vita. Abstract. Includes bibliographical references (leaves 126-138). Also available via the Internet.

Thesis (Ph. D. - Renewable Natural Resources)--University of Arizona, 1985. / Includes bibliographical references (leaves 228-233).

Thesis (M.S. - Biological Sciences)--University of Arizona. / Includes bibliographical references.

Thesis (M.A.)--York University, 2007. Graduate Programme in Higher Education. / Typescript. Includes bibliographical references (leaves 177-185). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:MR29266

Thesis (Ph. D.)--University of Rhode Island, 2003. / Typescript. Includes bibliographical references (leaves 178-187.

Thesis (M.S.)--University of Michigan, 1954.

Thesis (M.S.)--University of Wisconsin--Madison, 1969. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Thesis (M.S.)--University of Wisconsin--Madison, 1984. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 78-82).

Made available in DSpace on 2014-06-11T19:29:13Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-04-05Bitstream added on 2014-06-13T20:59:25Z : No. of bitstreams: 1 casarotti_eg_me_ilha.pdf: 1046762 bytes, checksum: b3101241568cb1eabd1384cb9c88c4f7 (MD5) / Umas das formas de garantir a disposição final adequada das águas residuárias é submetê-las ao tratamento através das lagoas de estabilização. Um dos fatores consideráveis para estas unidades de tratamento são as características hidrodinâmicas presentes no processo. Um das lagoas de estabilização é a influência dos ventos na massa líquida. O presente projeto de pesquisa avaliou a influência do vento no comportamento da circulação da massa líquida da Lagoa Facultativa 2 da Estação de Tratamento de Esgotos (ETE) da cidade de Álvares Florence – SP, por meio de flutuadores de diferentes dimensões (15, 21 e 35 cm). Foram confeccionados 9 flutuadores, 3 grupos com 3 flutuadores (um de cada dimensão) e lançados nas 3 entradas existentes na lagoa. A pesquisa foi dividida em duas etapas: na primeira etapa foram averiguados o tempo de percurso dos flutuadores ao longo de uma célula da lagoa facultativa 2 e o efeito de borda. Na segunda etapa foi verificada a influência dos ventos na movimentação da massa líquida e as condições de mistura proporcionadas por esta influência por meio dos flutuadores e análises de DQO. O método dos flutuadores para verificação da influência do vento e a circulação de uma lagoa facultativa mostrou-se como uma alternativa efetiva e simples quando comparado ao método com traçadores / One of the ways to ensure the proper disposal of wastewater is subject them to treatment by stabilization ponds. One of the significant factors for these treatment units are the hydrodynamic characteristics present in the process. Wind is external physical aspects that affect the hydrodynamic behavior of the stabilization ponds due to their influence on the circulation of the liquid mass. This research project evaluated the influence of wind on the behavior of the liquid mass flow of the facultative pond 2 of Sewage Treatment Plant in the city of Álvares Florence – SP, by means of floats of different sizes (15, 21 and 35 cm). Nine floats were made, three groups with three floats (one of each size) and released in three entries in the pond. The research was divided into two stages: the first step, were checked the travel time of the floats along of the facultative pond 2 and edge effect. In the second step was verified the influence of wind on movement of the liquid mass and mixing conditions provided by this influence by means of floats and COD analysis. The method for verification of the floats of the wind influence and the movement of a facultative pond proved to be a simple and effective alternative when compared with the tracer method

This research presents the development of a transmittance- absorptance parameter for a solar pond. Such a parameter represents, directly, the fraction of the incident solar radiation which is absorbed at the bottom of the solar pond. It can be used to represent pond performance through an equation analogous to the Hottel-Whillier-Bliss Equation for a flat-plate solar collector. The above parameter is called the transmittance - absorptance product and is an energy-weighted quantity. Monthly values of the proposed parameter are developed from an hour-by-hour simulation. The simulation utilizes hourly values of spectral solar radiation reaching the earth's surface which are computed from a state-of-the-art algorithm that has been slightly modified to better estimate diffuse spectral radiation at large solar zenith angles; the modification is also presented. Thermal conductive losses through the water layers and the surrounding earth together with evaporative and convective losses are usually the only loss mechanisms considered for a solar pond. Under clear skies and to a lesser extent under cloudy skies, a longwave radiation heat loss also occurs from the pond surface. The estimation of radiative loss from any terrestrial surface requires detailed computations and atmospheric data. The procedure has been greatly simplified through a correlation which yields spectral atmospheric emissivity from the amounts of absorbing gases present in the atmosphere. It is recommended for further study that the performance of a solar pond be estimated using the proposed transmittance-absorptance product to compute the solar energy absorbed in the pond, and that the longwave radiative loss from the pond be included in the analysis. A comparison with data obtained from an existing solar pond is recommended to validate the results obtained in this study. / Applied Science, Faculty of / Mechanical Engineering, Department of / Graduate