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A vertical subsurface flow constructed wetland (VSSFCW) and a free surface flow constructed wetland (FSFCW) were set for the objective of comparison the performance of two systems in order to make a decision of the better one for future installation of wastewater treatment system and power generation. Both of the constructed wetlands were planted with Cyperus Alternifolius. During the observation period (19 days or 456 hours), environmental conditions such as pH, temperature, total chemical oxygen demand (COD), phosphate (PO4), nitrate (NO3) ,total suspended solids (TSS), total dissolved solids (TDS), Pb, Cu, and Cd removal efficiencies of the systems were determined. According to the results, final removal efficiencies for the VSSF and FWSF, respectively, were: COD (94.3% and 94.3%),PO4 (84.3% and 75.3%), NO3 (100% and 100%), TSS (96.8% and 85.6%), Pb (65.8% and 81.4%), Cu (more than 94.7% and 89.4%), Cd (85.7% and 88%). The treatment performances of the VSSF were better than that of the FWSF with regard to the removal of suspended solids and nutrients. In FWSF systems, electricity generation performed better than VSSF of 31.4 mV especially with batch system during one wastewater feed is loaded among all of the nineteen days with maximum voltage of 33.7 mV and decreased gradually as oxygen depletion in cathode chamber and less metabolism processes has occurred.

A rise in the demand for fresh water is due to population growth in desert areas where high-quality, low-salinity water is scarce has prompted a rapid development of desalination technology, which has demonstrated its ability to address as well as resolving the water shortages in many dry locations throughout the world. Despite the benefits that could be realized from desalination under the global water crisis, the majority of people, including those who work in the water sector, regard it as a novel technology due to its lack of application. Currently, Desalinated water is used by only 1% of the global total to meet their daily needs. Nonetheless, the United Nations predicts that by 2025, Water scarcity will afflict 14% of the world’s population. For the reasons indicated in this study, Iraqi water sources have undergone a quantitative and qualitative deterioration, resulting in a rise in salt concentrations.

Although the practical application of Building Information Modelling (BIM) is already widely accepted, not only in Switzerland, it is often either considered as a method or as a technology. Regrettably, often this utilization depends on the context of a person respectively a company interpreting the abbreviation. Consequently, this is accompanied by a different approach to the underlying processes, roles and procedures. A comprehensive overview of the compulsory BIM activities and the associated definitions is therefore essentialwithout clear and commonly agreed definitions, no unambiguous exchange between the parties concerned is conceivable as well. However, many definitions used in the Building Information Modelling sector are currently industry-based and not on a standardized or normative basis. These are amongst others the so called "Dimensions of BIM", which are heavily used in construction projects. Unfortunately, only a few companies in the construction industry are privileged to have a complete overview of the necessary cross-firm activities needed in the BIM context and the consequences in using these project based specifications, as the industry is quite diverse in terms of digital competency maturity, availability of trained staff and the effective use of operational software. Projectrelated definitions therefore tend to be the common standard in the processing of BIM projects. The aim of this paper is to provide an overview of the different definitions of BIM dimensions by means of a literature search and to evaluate it from the perspective of an ordering party.

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