RT info:eu-repo/semantics/bachelorThesis
T1 Analysis of flocculation/flotation as wastewater pretreatment
T2 Analiza flokulacije/flotacije kot predobdelave odpadne vode
A1 Olmedo Gómez, Julia
A2 Universidad de Valladolid. Escuela de Ingenierías Industriales
K1 AOP
K1 n-hexane
K1 Extractable material
K1 Wastewater
K1 Pretreatment
K1 Flocculation/flotation.
K1 3303 Ingeniería y Tecnología Químicas
AB The purpose of this bachelor thesis is to optimize pretreatment of a wastewater from cosmetic industry. The current cleaning process in industry consists of two steps, namely i) AOP (Advanced Oxidation Process), and ii) flocculation/flotation (FF). However, as the HEM (n-Hexane Extractable Materials) decreases the efficiency of the AOP process by heavily blocking the light to penetrate in the wastewater to be cleaned, a first FF in acid environment is introduced in the process as pretreatment. The parameters that were varied to carry out the optimization were i) Fe2(SO4)3 content added in first FF and, ii) H2O2 content. To precise, JAR tests were carried out to make the FF and the sample was put in a 1.8 L reactor and subjected to UV light in the AOP treatment. For the better distribution of the H2O2 and Fe2(SO4)3 addition to the cleaning process the design of experiment was used. The HEM measured was carried out according to standard method “United States Environmental Protection Agency (EPA), Method 1664, Revision B: n-Hexane Extractable Material (HEM; Oil and Grease) and Silica Gel Treated n-Hexane Extractable Material (SGT-HEM; Non-polar Material) by Extraction and Gravimetry”. We found that the percentage of removal is very high, it goes from 96.3% till more that 99.9%. In average, with this new first FF, the percentage of removal is 98.61% which represents a very high enough removal rate of HEM to achieve the WW disposal limits in most cases. Only 3 out of 9 experiments exceeded the emission limit of 100 mg/L of HEM due to the type of surfactant, which we can conclude it has a strong influence in the removal of HEM.
YR 2021
FD 2021
LK https://uvadoc.uva.es/handle/10324/52338
UL https://uvadoc.uva.es/handle/10324/52338
LA eng
NO Departamento de Ingeniería Química y Tecnología del Medio Ambiente
DS UVaDOC
RD 23-may-2024