There is an urgent need to develop and improve low cost technologies for wastewater treatment. Simultaneously treating wastewater and producing duckweed in a pond system is, therefore, an attractive solution contributing to both environmental protection and food production. Duckweed has excellent qualities: a high protein content, a high growth rate and is an easy crop to handle. The small plant turns nitrogen from wastewater into a food source. This thesis reports on the effect of different operational variables, like anaerobic pre-treatment, the combination of algae and duckweed ponds and pond depth. Improved nitrogen removal was obtained through the combination of duckweed ponds with algae ponds. Duckweed pond systems could be designed with shallow depth without affecting nitrogen removal efficiency. This research is the result of the cooperative effort between the EIDENAR, Univalle, Cali, Colombia and the UNESCO-IHE Institute for Water Education in Delft, the Netherlands.Given this focus on health care associated injury we can have as vision for patient safety as: Zero health care ... Cook (1998) emphasizes that future failures of automated systems cannot be forestalled by providing simply another layer of defense ... aRather, safe equipment design and use depends on a chain of involvement and commitment that begins with the ... in health care should be completed within the context of what others have identified as useful criteria and issues relative toanbsp;...
|Title||:||Effect of Operational Variables on Nitrogen Transformations in Duckweed Stabilization Ponds|
|Author||:||Julia Rosa Caicedo Bejarano|
|Publisher||:||CRC Press - 2005-03-24|