Issue 1 [March]( Issue on Wastewater Management ) Wastewater Reuse Criteria In GreeceAndreadakis A., Gavalaki E., Mamais D. and Tzimas A., Pages:9-14 DOI: https://doi.org/10.30955/gnj.000291Paper Topic: General Issue: Issue 1Get Full Paper AbstractThe sustainable management of water resources often requires the identification of wastewater as a valued source of water. Although the benefits of wastewater reuse and reclamation have increased significantly in Europe because of the advances in effectiveness of wastewater treatment and disinfection technologies there is currently no legislation nor guidelines regarding reuse. It is well known that there is a great variation of wastewater reuse quality criteria applied, mainly related to significant differences in socioeconomic conditions, environmental policies, available water resources. In this work the parameters that affect the wastewater reuse criteria in Greece are evaluated, concerning among others reuse priorities, available treatment plants and effluent characteristics and recommendations are made for developing future guidelines or regulations for Greece in relation to reuse practices (agricultural, urban, etc). The intention is not to propose an unquestionable and rigid set of standards, but to present them on the basis of the rationale developed, in order to form a basis for further consultation, involving all the interested parties. The recommendations are presented in relation to the different types of reuse, with appropriate specific standards and recommended treatment systems wherever applicable. Integrated Wastewater Management on a County BasisTzimas A., Gavalaki E. and Andreadakis A., Pages:15-22 DOI: https://doi.org/10.30955/gnj.000293Paper Topic: General Issue: Issue 1Get Full Paper AbstractThe paper discusses a methodology for integrated municipal wastewater management. In compliance to the EU Directive 91/271, there is a legal binding to ensure that all agglomerations with populations over 2000 are provided with wastewater collecting system and adequate treatment. The conditions for optimum application of the Directive in Greece, especially in the light of the recent administrative reorganization, and the management of small rural communities not covered by the Directive are addressed, with reference to a case study application in the Achaia County. In compliance to the EU Directive 91/271, it is estimated that collecting systems and treatment should expand to at least 70% of the total population. However, due to the expanding touristic activity, the limited availability of land, environmental considerations, and favorable population characteristics (high density, relatively large communities) and morphological and socioeconomical conditions, it is proposed that coverage can reach to 85% of the total population. As for the rest of the County population (15%), decentralized on site wastewater treatment and disposal schemes were proved to be the most technically effective and economically efficient alternative. Treatment of Water Contaminated with DI-N-Butyl Phthalate by Foto-Fenton ProcessAl-Tawabini B.S., Pages:23-28 DOI: https://doi.org/10.30955/gnj.000263Paper Topic: General Issue: Issue 1Get Full Paper AbstractThis study was conducted to assess the removal efficiency of Di-n-butyl phthalate (DnBP) from aqueous medium using the photo-Fenton process. The Fenton's reagent that consists of a mixture of hydrogen peroxide (H2O) and ferrous ions (Fe2+) was used to generate the hydroxyl radical (OH0) that attacks the target contaminant and degrade it. An ultraviolet (UV) source was used to provide the radiation needed in the photo-Fenton method (i.e. UV/H2O2/Fe2+). The results demonstrated that photo-Fenton process was more effective and faster than Fenton's reagent in removing DnBP and that photolysis by UV irradiation was the dominant mechanism in degrading the compound. The results also showed that enhancing the removal via UV irradiation was achieved by increasing either the temperature or the H2O2 concentration. Characterisation of Metal Retention Agents and Study of their Application in Liquid WastesXirokostas N., Korkolis A., Diamantopoulou L., Zarkathoula Th. And Moutsatsou A., Pages:29-37 DOI: https://doi.org/10.30955/gnj.000267Paper Topic: General Issue: Issue 1Get Full Paper AbstractA procedure that should be implemented for the evaluation of materials suitability, in terms of their use as metal retention agents, is presented. It derives from a review of materials and waste treatment mechanisms, which has been studied and is also presented. Lignite fly ash, agricultural ashes, lime and sawdust were chosen for the experimental study of their metal uptake capacity, according to the proposed stages, during the treatment of an acidic liquid waste loaded with metals (Cu, Zn, Fe, Ni, Cd, Cr). Fly ash, agricultural ashes and lime exhibited increased metal retention percentages through adsorption and precipitation, as it was expected due to their structure, while sawdust acted as sorbent. Corn Irrigation with Reclaimed Municipal WastewaterPanoras A., Evgenidis G., Bladenopoulou S., Melidis B., Doitsinis A., Samaras I., Zdragkas A. and Matsis Th., Pages:39-45 DOI: https://doi.org/10.30955/gnj.000286Paper Topic: General Issue: Issue 1Get Full Paper AbstractThe effects of effluent from Thessaloniki, the second most populated Greek city, reclaimed either by activated sludge or by stabilization ponds, were studied on field-grown corn. The experimental layout was that of a split- plot design with six replications, three water qualities and two irrigation methods. Potable water was used as the control. No significant differences in corn yield have been observed among the three water-quality treatments. However, significant differences have been observed in corn yield between the irrigation methods. Furrow irrigation has produced about 10% more corn yield than trickle irrigation. There is a potential risk of facing problems related to soil salinity and alkalinity if no consideration for soil reclamation is taken into account. The trace element concentration in the soil and plant was low. The chlorinated effluent was free of pathogens, while the presence of pathogens was detected in the non-chlorinated effluent reclaimed by the stabilization ponds.