Kossay Alahmady

Kossay Alahmady
University of Mosul · Department of Civil Engineering

PhD

About

50
Publications
22,954
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114
Citations

Publications

Publications (50)
Article
The aim of this study is to evaluate the energy density levels of internet network towers in Mosul city that operate in the 5 GHz frequency band, and then compare the observed energy density levels to national and international standards for radiation protection. In this study, the HF-B8G instrument used to measure the energy density of electromagn...
Conference Paper
Full-text available
Parallel to the rapid development in technology, cellular systems and thus base stations have begun to occupy more space in our daily life. Since each base station is a source of an electromagnetic field (EMF), the increase in the base stations has led to an increase in the levels of electromagnetic fields in the medium. Long-range measurements of...
Article
Full-text available
Asbestos is a generic name, given to the group of six minerals “naturally occurring” which has world widespread use in a variety product. In 1970, asbestos was classified as an occupational hazard, studies refer that asbestos cause death to 107000 person per year around the world, and it’s probably cause millions of deaths. In this study, the soil...
Article
The study aimed to evaluate the bottled water quality in northern of Iraq. One hundred ninety two sachets of water samples from the four bottled water types were collected from the factories and network tap water and examined in the first half of 2019 in Mosul city in northern of Iraq, and assessed their suitability for drinking and human consumpti...
Article
In this research, an experimental laboratory plant was constructed in order to evaluate the effect of organic, nitrogenous and phosphorus loads on the removal efficiency and behavior of duckweed based wastewater stabilization ponds. The results of the study showed that; covering the oxidation ponds with duckweed improve their ability to treat highe...
Article
This study deals with the effect of detention time and temperature on the values of pH, DO and the removal efficiency and behavior of duckweed based wastewater stabilization ponds. The results of the study showed that; covering the oxidation ponds with duckweed decreases the values of pH of the effluent wastewater. The values of (pH) and (DO) for e...
Article
Membranes are considerably a physical technology for wastewater treatment, which has existed since the 1960s. However, membrane technology has increased and extended in application in recent years and this technique was promising treatment technologies. This is partly due to strong regulations in industrialized countries regarding effluent quality...
Article
Full-text available
This research deals with measuring the energy density levels of the mobile phone towers for the downlink of the GSM 900 and GSM 1800 frequency range signals for the Asiacell and Korek companies in the city of Mosul and comparing them with the national and international standards for radiation protection. This research used SRM-3006 to measure the e...
Article
The present research has been conducted to trace the various effects of Mosul city demolition waste materials (DMs), on the geotechnical properties of clay. The properties of the samples have already been investigated and evaluated. Moreover, cement has been added to upgrade these properties. Finally, the fine demolition has been added to a highly...
Article
After the liberation of the Old City in Mosul, the Midan region appears to be the most affected part of the Old City. In the current study, debris of the Midan region was studied in detail by defining the destroyed areas using geographic information systems (GIS), then calculating the volume and weight of the total debris. The ratio of each compone...
Article
Full-text available
Asbestos is a generic name given to the group of six naturally occurring fibrous minerals which has world widespread use in a variety of commercial products. Asbestos is a professional and environmental risk, studies refer that asbestos cause death to 107000 person per year around the world, and it's probably cause millions of deaths. In this study...
Article
Full-text available
This study deals with the effect of detention time and temperature on the values of pH, DO and the removal efficiency and behavior of duckweed based wastewater stabilization ponds. The results of the study showed that; covering the oxidation ponds with duckweed decreases the values of pH of the effluent wastewater. The values of (pH) and (DO) for e...
Article
Full-text available
Cement industry consumes a big amount of water, which is used in both of the industrial processing and in the cooling system. In this paper, an industrial surveying was carried out to evaluate the condition of industrial wastewater produced in Hammam Al-Alil cement factory and to investigate the ability to reuse the cooling water, which was used on...
Article
Full-text available
Oxygen transfer capacity has greatest influence on activated sludge performance. In this study, experimental procedure is carried out to determine the effect of airflow rate and the level of diffusers submergence, on the oxygen transfer rate of diffused air systems. In addition, a number of readings were also collected from published papers. The da...
Article
Full-text available
In this research, an experimental laboratory plant was constructed in order to evaluate the effect of nitrogen and phosphorus loadings and recirculation ratio on the nutrient removal efficiency of trickling filter. The plant consisted of four biological trickling filter similar in shape, each with a volume of (35 liters). Synthetic wastewater was u...
Article
Full-text available
In this research, the effect of intermittent feeding on the efficiency of plug flow activated sludge reactors has been studied. An experimental plant has been constructed and operated. The plant consists of five identical reactors with the volume of (15) liter working in parallel under the same operating conditions for each of discharge; sludge rec...
Article
Full-text available
The Nalgonda method is one of the effective methods for fluoride removal, especially with low and medium initial fluoride concentrations. In this research, the ideal conditions were found through studying the factors that affect the fluoride removal efficiency (initial fluoride concentration, pH, alum dose, mixing time for flocculation and coagulat...
Article
Full-text available
In this research, an experimental laboratory plant was constructed in order to evaluate the effect of organic, nitrogenous and phosphorus loads on the removal efficiency and behavior of duckweed based wastewater stabilization ponds. The results of the study showed that; covering the oxidation ponds with duckweed improve their ability to treat highe...
Article
Full-text available
In this research an experimental laboratory pilot plant was used to assess the ability of the integrated fixed film activated sludge (IFAS) process to upgrade the hydraulic capacity of the ordinary activated sludge units. The experimental plant consisted of three basins, which were designed to work simultaneously under the same operating conditions...
Conference Paper
Full-text available
Noise is a pollutant. In contrast to other environmental problems, noise pollution continues to grow, and it has a short decay time. In this paper, seven reference libraries which situated in different locations inside university campus were assessed. At each location, noise levels were measured continuously every 30 seconds for at least 3 hours. M...
Article
Full-text available
In this research, five experimental plants have been established and operated using synthetic domestic wastewater in order to study the effect of some operational parameters on the removal efficiency of organic and nutrients pollutants in Bardenpho Process. The results of the research proved that the removal efficiency of organic, nitrogen, and pho...
Conference Paper
Full-text available
Portable power generators are commonly used in homes, offices, shops in Iraq today in order to supply power during power shutdown. These mechanical equipments, the portable power generators emit relatively a high level of noise. Its effect on the human varies from permanent hearing damage down to disturbed sleeping depending on sound pressure level...
Article
Full-text available
In this research, four experimental plants have been constructed and operated in order to study the impact of using the anaerobic selectors on the behavior and efficiency of the extended aeration activated sludge system. The study program was divided into three stages. In the first stage, the experimental plants were run on the hydraulic retention...
Article
Full-text available
In this research, measured of total (TSP) and fine suspended particulate PM1, PM2.5, PM7 and PM10 in Badoosh cement factory was carried out. Seventeen locations inside the factory ware selected. The effect on soil around the cement factory was also studied by collecting samples in the four directions North, South, East and West till five kilometers...
Article
In this study, three laboratory units were constructed and operated in order to investigate the effect of pre-aeration on removal efficiency of ammonia and organic materials for solid waste leachate from Quashi landfill in Duhok city. The effect of aeration times and pH values on the removal efficiencies were also investigated in this study. Each u...
Article
Full-text available
This study deals with the ability of noise isolation for some typs of concrete block used in Iraq. These materials are divided into groups and the noise isolation of these materials is tested by a device made locally. The results of these materials are compared and the following conclusions are reached: the sound isolation increases generally with...
Article
Full-text available
In this research, the study of the effect of both feeding and aeration on the efficiency and stability of plug flow activated sludge systems has been done, so the experimental plant has been established and turned on, it consists of five biological reactors identical in the shape of (15) liter, they are designed to work parallel under the same oper...
Article
Full-text available
In this research, an experimental plant was constructed and operated in order to study the efficiency of the intermittent aeration activated sludge system that operated at the ratio of (On/Off aeration times) (15min/15min), (30min/30min), (60min/60min), (90min/90min) and (120min/120min) and compare their performance with the continuous flow extende...
Article
Full-text available
Three laboratory scale units are designed for work with intermittent activated sludge system against one laboratory scale unit with continuous feed system. The Work was divided into four operational stages by changing hydraulic retention time for each stage (6, 12,18, 24 hrs) , and changing F/M during stage (1.5- 1, 0.6, 0.3, 0.1) BOD mg/l /MLVSS m...
Article
Full-text available
In this research, an experimental laboratory plant was constructed in order to evaluate the effect of recirculation ratio, organic loading and suspended solids loading on the removal efficiency of trickling filter with plastic media. The plant consisted of four biological trickling filter which were similar in shape, each with a volume equal to (35...
Article
Full-text available
Abstract: Three laboratory scale units are designed for work with intermittent activated sludge system against one laboratory scale unit with continuous feed system. The Work was divided into four operational stages by changing hydraulic retention time for each stage (6, 12,18, 24 hrs), and changing F/M during stage (1.5- 1, 0.6, 0.3, 0.1) BOD mg/l...
Article
Full-text available
This study deals with the effect of some operational parameters on the removal efficiency and behavior of duckweed based wastewater stabilization ponds. The results of the study showed that; covering the oxidation ponds with duckweed improve their ability to treat higher organic and nitrogenous loads. In addition, there is a relationship among the...
Article
Full-text available
In this research, an experimental plant was operated in order to study the effect of solid mixing ratio and temperature on the performance of dry anaerobic composting (Dranco) reactors treating domestic solid wastes. The experimental plants consists of four reactors, which were operated under different temperatures of 35 o C, 45 o C, 55 o C, and 65...
Article
The effects of retention time, duration of operation, and the relationship between surface area to depth ratio on nitrogen and phosphorus removal efficiencies were assessed in duckweed-populated flow-through experimental reactors. Reactors were designed so that a group of four reactors had the same surface area but each reactor in a group differed...
Article
Full-text available
Oxygen uptake rate is one of the important parameters in operating the activated sludge systems. In this research, six types of wastewater were used to investigate the effect of wastewater kinds on both of oxygen uptake rate and specific oxygen uptake rate. The wastewaters involved in the study were domestic, hospital, dairy, sugar industry, textil...
Article
Full-text available
Activated sludge processes can be set up as continuous flow reactors (CFR) or cyclic fill and draw systems, also known as sequencing batch reactor (SBR). In this research, a comparison between these two processes was carried out. Two identical laboratory scale reactors were used in this study. The reactors were designed to work under the same opera...
Article
Full-text available
The growth of urban areas and constant need for potable water services, have highlighted the importance of accurate water consumption estimates for effective municipal water services infrastructure planning and design. A clear understanding of the drivers of residential water demand is essential in managing water resources appropriate as potable wa...
Article
Full-text available
The key element in developing an analytical or mathematical procedure is to determine the main factors that possess potential importance in oxygen transfer process. In this paper, the factors that affect the oxygen mass transfer coefficient (K L a) in activated sludge units are determined. A dimensional analysis procedure is adopted to develop a ma...
Article
Full-text available
In this paper, a laboratory plant was constructed and operated in order to assess the effect of stages; detention times and depth of filter on the performance of the upflow anaerobic biological filter that treating domestic grey water. The experimental plant was consisted of two upflow anaerobic filters; the first one operates with a single stage,...
Article
Full-text available
Abstract In this research, an experimental plant was operated in order to study the effect of solid mixing ratio and temperature on the performance of dry anaerobic composting (Dranco) reactors treating domestic solid wastes. The experimental plants consists of four reactors, which were operated under different temperatures of 35 o C, 45 o C, 55 o...
Article
Full-text available
The efficiency of oxygen transfer depends on many factors including the type, size and shape of diffusers and the tank geometry. In this paper, the effect of the depth of water in the tank and, the extension of coverage area of diffusers on each of oxygen transfer capacity (OC), efficiency (E) and, on a percentage of oxygen absorption (delta) is te...
Article
Full-text available
The efficiency of oxygen transfer depends on many factors including the type, size and shape of diffusers and the tank geometry. In this paper, the effect of the depth of water in the tank and, the extension of coverage area of diffusers on each of oxygen transfer capacity (OC), efficiency (E) and, on a percentage of oxygen absorption (δ) is tes...
Article
Full-text available
Organic loading (weight per unit time per volume) is useful for the design of rotating biological contactors (RBC) and for comparison with the other processes such as activated sludge or oxidation ponds. The present study puts emphasis on the significance of this control or design parameter because it allows direct comparison of the RBC system's pe...

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