Technical and economical optimization of a batch membrane process for olive mill wastewater treatment characterized by different pretreatment steps

Visualitza/Obre
Tutor / director / avaluadorDi Palma, Luca
Tipus de documentProjecte Final de Màster Oficial
Data2014
Condicions d'accésAccés obert
Abstract
Olive Mill Wastewater is a heavy polluted liquid stream exiting the olive oil production
process. It is a critical environmental problem due to the quantity of organic and
inorganic matter that contains.
Lots of studies have been done in order to improve the treatment of this wastewater.
This thesis has been focused in the treatment of OMWW by an ultrafiltration process
preceded by different pretreatments as sieving, coagulation‐flocculation or
photocatalysis.
Different variants of the treatments have been carried out; two samples of OMWW have
been treated using HNO3 as reagent, one pretreated just by a coagulation‐flocculation
and the other also with a photocatalytic process, and two other samples using H2SO4,
also one pretreated by just a coagulation‐flocculation process and the other also by a
photocatalytic process.
Comparing the different variants of the treatment has been seen that for those
treatments using HNO3 as reagent the COD of the Ultrafiltration feedstream is lower
when besides the flocculation it has also been done the photocatalysis. This fact does
not happen for the samples treated using H2SO4 because the photocatalysis carried out
using H2SO4 has a really low COD reduction.
Concerning the economic costs, it has been observed that the treatments using HNO3
are more expensive than the ones using H2SO4 and that the photocatalysis increases
considerably the cost of the treatment. Moreover, has been studied the evolution of the
treatment cost when the volume of OMWW treated increase, and it has been seen that
the costs tend to stabilize quickly after an abrupt reduction at the beginning. After a
comparison between the treatment costs and the cost of the OMWW scattering has
been observed that from a small amount of OMWW, its treatment is more profitable
than its scattering both in economic and environmental terms.
Future research is needed for a better understanding of the behavior of H2SO4 as
reagent because it could be a good economical alternative in the treatment of OMWW.
Col·leccions
Fitxers | Descripció | Mida | Format | Visualitza |
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Final Report_MariaAuria.pdf | Report | 1.454Mb | Visualitza/Obre |
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