Science Target Conference Systems, Ajman 4th International Environment Conference 2016

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Assessing the Impact of Different Irrigation Waters on Capsicum annuum Grown in a Greenhouse
RAWAA AL-ISAWI, Miklas Scholz

Last modified: 2015-11-03

Abstract


With increasing water demands and lack of freshwater, particularly in regions of scarce water resources, the reuse of wastewater has become an attractive option to compensate for the shortfall in freshwater resources and to meet the growing need in relatively clean water. The study aims to assess the impact of two types of water sources: (a) treated wastewater from a set of ten different wetland filters; and (2) untreated wastewater from five sources (river, rain, gully pot, real grey and artificial grey waters) to water commercially grown crops. The corresponding objectives are: (i) to examine the impacts of variables and boundary conditions on the growth of Chillies (Capsicum annuum) under semi-natural conditions; (ii) to assess the influence of wastewater quality on Chilli fruits (specifically their marketable yields); and iii) to evaluate the impact of metals and nutrients accumulated in the system. Regarding treated wastewater, findings show that the overall growth developments of Chilli plants were relatively high, which indicate that the irrigation water has variable concentration of nutrients and trace minerals. High yields in terms of economic return were observed in wetlands with small aggregates, low loading rate and a low contact time. As far as untreated wastewater is concerned, except for artificial grey water, the water qualities were highly variable, depending on season and temperature (river, rain and gully pot waters), family home practices (real grey water), and domestic and industrial effluent discharges (river water). The highest yields were associated with river water followed by gully pot water.