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Title: Using Sewage Sludge as a Soil Amendment for Tomato Production:Case Study of Kuwaiti Wastewater Treatment Plant “Al-Raqqa Plant“
Authors: Asma’a Raikan Al-Khaldi 
Supervisor: Dr. Abdirashid Elmi
Keywords: Sewage Sludge , Soil Amendment , Tomato ,Kuwaiti Wastewater , Al-Raqqa
Issue Date: 2016
Publisher:  Kuwait university - college of graduate studies
Abstract: Heavy metal presence in sludge is one of the most serious environmental and health concerns in regards to sludge land application, along biological and microbiological indicators. Heavy metals mainly enter food chain through the uptake by plants from soil/water system, and finally end up in human. This study was intended for determining the suitability of using sewage sludge from Al-Raqqa wastewater treatment plant, Kuwait, as soil amendment. The study was conducted on a pot experiment planted with Tomatoes. The objective was to examine the suitability of using sludge as fertilizer in terms of concentrations of heavy metals in the soil, leachate, and different parts of plant) and check whether the sludge conforms to standards recommended by international regulatory agencies. Sampling campaign was carried out on four different stages: beginning of the experiment before planting, two sampling during growing period, and one sampling at the end of the experiment (harvest day). The samples analyzed for the heavy metal concentrations such as (Zinc, Chromium, Copper, Cadmium, Lead, and Nickel). Main results obtained from analysis shows that Magnesium (Mg) is the most commonly found metal in tomato fruit. Among the heavy metals, Zinc (Zn) was the most frequently detected in high concentrations. There was a trend of total metal concentrations increasing correspondingly with the increase in the sludge to soil ratio. These elements are important for human health and conversely either their exceedances or deficiencies would have negative side effects.
Appears in Programs:2040 Environmental Sciences

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