• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 1
  • 1
  • Tagged with
  • 2
  • 2
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

ELECTROCOAGULATION/FLOTATION TREATMENT OF SYNTHETIC SURFACE WATER

Gunukula, Sampath Reddy 04 May 2011 (has links)
No description available.
2

Estudo da eficiência do processo de coagulação/floculação na tratabilidade de águas residuárias têxteis / Efficiency study of coagulation/flocculation in textile wastewater treatability

Dotto, Juliana 19 February 2013 (has links)
Submitted by Marilene Donadel (marilene.donadel@unioeste.br) on 2017-12-01T22:57:34Z No. of bitstreams: 1 Juliana_Dotto_2013.pdf: 2822116 bytes, checksum: 3b8be919381051b7c1e0d2252f604aed (MD5) / Made available in DSpace on 2017-12-01T22:57:34Z (GMT). No. of bitstreams: 1 Juliana_Dotto_2013.pdf: 2822116 bytes, checksum: 3b8be919381051b7c1e0d2252f604aed (MD5) Previous issue date: 2013-02-19 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / This study evaluated the efficiency of organic coagulants like seeds of Moringa oleifera Lam extracted in saline solutions of sodium chloride and potassium chloride1,0 (MO-NaCl and MO-KCl, respectively) and inorganic coagulants like aluminum sulfate and ferric chloride to the treatment of textile wastewater. Initially, it has been evaluated the best pH for each coagulant studied to then optimize the concentration of the coagulants and settling time. For this finality, it has been used velocity of rapid mixing (VMR) and slow (VML) at 100 rpm and 20 rpm, respectively and time of rapid mixing (TMR) and slow (TML) for 2 minutes and 20minutes, respectively. The parameters analyzed were pH after treatment, absorbance at a wavelength of maximum absorption for each dye present in the wastewater (Procion Orange HER and Procion Red HE-7B), color, turbidity and COD. In the test for optimization of coagulants concentration and settling time, also was evaluated the amount of sludge generated at each concentration studied. Thus, organic coagulants showed superior results in comparison with inorganic coagulants in the treatment of textile wastewater, especially MO-KCl, which showed removal of 86,8% for absorbance of the dye Procion Orange HER, 75,65% for absorbance of the dye Procion Red HE-7B, 70,67%forcolor, 85,97% for COD and 64,07% for turbidity. Based on the results obtained, MO-KCl presented a promising coagulant in the treatment of textile wastewater. / O presente estudo avaliou a eficiência dos coagulantes orgânicos sementes de Moringa oleifera lam extraídas em soluções salinas de cloreto de sódio e cloreto de potássio 1,0 (MO-NaCl e MO-KCl) respectivamente, além dos inorgânicos sulfato de alumínio e cloreto férrico no tratamento de água residuária têxtil. Inicialmente, avaliou-se o melhor pH de trabalho para cada coagulante estudado, para, em seguida, otimizar a concentração do coagulante e o tempo de sedimentação. Para isto, utilizou-se velocidade de mistura rápida (VMR) e lenta (VML) de 100 rpm e 20 rpm respectivamente, e tempo de mistura rápida (TMR) e lenta (TML) de 2 minutos e 20 minutos, respectivamente. Os parâmetros analisados foram pH após tratamento, absorbância no comprimento de onda máximo de cada corante presente na água residuária (Laranja Procion HER e Vermelho Procion HE-7B), cor, turbidez e DQO. Além destes, no teste para otimização da concentração de coagulante e tempo de sedimentação, avaliou-se a quantidade de lodo gerado em cada concentração estudada. Assim, os coagulantes orgânicos apresentaram resultado superior aos inorgânicos no tratamento da água residuária têxtil, com destaque para a MO-KCl, que apresentou remoção de 86,8% para absorbância do corante Laranja Procion HER, 75,65% para absorbância do corante Vermelho Procion HE-7B, 70,67% para cor aparente, 85,97% para DQO e 64,07% para turbidez. Com base nos resultados obtidos a MO-KCl pode ser considerada um coagulante promissor para o tratamento da água residuária têxtil.

Page generated in 0.0754 seconds