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Browsing by Issue Date, starting with "2011-04-25"

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  • New technologies for municipal wastewater treatment
    Publication . Ribeiro, Belina; Moreira, Cristina; Pontes, Diogo; Grasmick, Alain; Duarte, José Cardoso
    New technologies to treat and recycle water from municipal waste water treatment plants are of utmost urgency. This study is taking place on the Mondego River, lower basin and estuary, from Coimbra to Figueira da Foz and contribute for the environmental sustainability of this region. In this work we developed a new treatment system using submerged membrane bioreactors for improved treatment and removal of pollution eliminating particles, bacterial and virus fro the treated effluents. Use of microalgae photoreactors as an alternative tertlary treatment of urban wastewaters was also evaluated. Monitoring and long distance supervision are also possible with the system. The biotreatment process was monitored with an online sensor based on ultra violet spectra technology for continuous analysis of COD, NO3 and TSS. This system eliminates the constant need for samples recollection to further analysis. Supervision is ensured by last generation SCADA software (MOVICON), analyzing in real time all the occurrences and registering all the values in a data base. A new system of at distance supervision and control for urban wastewater treatment plants (WWPT's) was also tested and could allow for better technical performance and economy. Physico-chemical characterisation of local WWTP's and Mondego River were performed, in order to test a kinetic model representative of the impact of WWTP's in the environment.
    2011-04-25Conference object Open access Show more
  • Oleico+ sustainability in the olive mill waste management
    Publication . Ribeiro, Belina; Duarte, José Cardoso; Santori, Francesca; Auguto, Grabriela
    Olive oil production generates olive mill wastes estimated at 2.5 million tonnes. More than 80% of olive mill wastes consist in water. Olive mill wastewater (OMW) has environmental impacts due to its high organic load and contents in phenols, lipids and organic acids. The project Oleico +, supported by the European Program LIFE, brought together 4 Institutions from 4 European Member States to seek and select a set of environmental friendly technologies for the remediation or valorization of olive mill wastes, and to raise the awareness of olive oil stakeholders for an environmental sustainable olive mill waste management. The OLEICO + project selected eight technologies to manage olive mill wastes that may be applied to different olive mill systems and amounts of waste generated. This selection was performed with a point to grid classification of technologies sustainability and status. To access eco-sustainability several parameters were accounted, including carbon dioxide emissions, landscape impacts and bead smells. Eleven technologies were selected out of 28 inventoried. Specifically five of these technologies deal with OMW and its detoxification, and four of them produce reusable water for irrigation. Other three technologies are focused in the energetic and or agronomic valorization of olive mill wastes. Some of these technologies present positive net income values, a many of them do not require specialized workforce, but the small dimension of olive mills make the management of olive mill wastes a challenge for the industry
    2011-04-25Conference object Open access Show more