ABSTRACT
Recent findings show that halophytes have the ability to accumulate salts in their tissues, making them a very interesting group of plants for domestic wastewater treatment in constructed wetlands (CWs). In that case, it might be possible to reduce the salinity of the final effluent, which is a crucial parameter for wastewater reuse in agriculture. During this study three halophytes, Atriplex halimus, Juncus acutus and Sarcocornia perennis, were tested for phyto-desalination of domestic wastewater in a vertical flow constructed wetland (VFCW) and compared with common reeds (Phragmites australis). In addition, the effect of this alternative vegetation on the overall performance of the system regarding organic matter, nutrients, boron and pathogen removal was monitored. The organic loading rate (OLR) was about 21gCOD/m2/d and the hydraulic loading rate (HLR) was 95mm/d in both cases. Promising results were obtained for A. halimus, which shows high biomass productivity and significant capability to accumulate salts, mainly Na, in its tissues. A positive effect on pathogen removal efficiency was also recorded. However, nitrogen concentration in the effluent of the VFCW planted with halophytes was found to be higher than in the effluent of the VFCW planted with reeds. Finally, no significant effect on organic matter and phosphorus removal efficiency was observed from the use of halophytes in place of reeds.
ABSTRACT
There is a lack of information about the status and characteristics of community cardiopulmonary resuscitation (CPR) training in Greece. The purpose of this study was to evaluate the knowledge of basic aspects of CPR practice, characteristics of training, and areas in need of improvement to increase CPR competence in the community. Using a random-digit-dialing telephone survey, 390 residents of a large county were interviewed. Weighting methods were used to estimate population statistics. Results indicated a low prevalence of current training and lack of basic CPR knowledge, reflecting the limited extent of and access to training. Results suggest the need for a standardized, widespread CPR program.
