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anti-coagulants.
مضادات تجلط الدم.
Last Update: 2016-10-27
Usage Frequency: 2
Quality:
metal salt coagulants
مخثِّرات أملاح معدنية
Last Update: 2023-01-20
Usage Frequency: 1
Quality:
that's coagulants and anti-coagulants.
هذا مجمد و مضاد للتجمد
Last Update: 2016-10-27
Usage Frequency: 2
Quality:
i recommend natural coagulants, such as chicken liver.
و أفضل إستخدام مجلطات طبيعية للدم مثل كبد الدجاج
Last Update: 2016-10-27
Usage Frequency: 2
Quality:
the anti-coagulants will resolve your symptoms and help you heal.
سأصف لكِ الكومارين الذي سيقلل من الأعراض وسيساعدكِ على الشفاء
Last Update: 2016-10-27
Usage Frequency: 2
Quality:
the coefficient on the blood coagulants is almost matching. hey!
معامل التجلط في الدم مطابق تقريبا
Last Update: 2016-10-27
Usage Frequency: 2
Quality:
anti-coagulants will treat the symptoms and prevent further damage, but we've got to get you to the hospital.
والكومارين سوف يعالج تلك الأعراض ويمنع المزيد من الأضرار ولكن علينا إحضارك إلى المستشفى
Last Update: 2016-10-27
Usage Frequency: 2
Quality:
preliminary analysis suggests that this has been achieved in baghdad city and several governorates by improved water treatment using coagulants such as alum sulphate and effective disinfection through the use of chlorine.
ويُظهر تحليل تمهيدي للحالة أن ذلك قد أنجز في مدينة بغداد وفي عدة محافظات عن طريق تحسين معالجة المياه باستخدام مواد التخثير مثل كبريتات اﻷولومنيوم وبفضل التطهير الفعال بواسطة الكلورين.
Last Update: 2016-12-01
Usage Frequency: 1
Quality:
safe water supply is essential to maintaining human life and sustain ecosystems and community societies. drinking water treatment is a complex issue, and the treatment chain comprises several processes, which vary depending upon the legislation, the removal targets of contaminants and the costs associated with them. in 1854, it was discovered that a cholera epidemic spread through water. the outbreak seemed less severe in areas where sand filters were installed. british scientist john snow found that the direct cause of the outbreak was water pump contamination by sewage water. he applied chlorine to purify the water, and this paved the way for water disinfection. this discovery led to governments starting to install municipal water filters (sand filters and chlorination), and hence the first government regulation of public water. since then, among water treatment chains, filtration has constituted the centre of drinking water treatment—together with disinfection—for well over a century [1]. filtration represents a barrier for some of the most common issues encountered in the water supply industry; colour, turbidity and harmful microorganisms being the main ones among them. moreover, filtration plays an important role in the multi-barrier approach employed for the removal of pathogens. the presence of suspended solids and any particulate matter increases the resistance of most microbes to disinfection. therefore, a low particle removal performance by granular filtration can decrease the disinfection efficiency [2]. pathogens and organic compounds are some of the main foci for water treatment in scotland; as a consequence of the land and the livestock farming practiced in the region. for this reason, there is considerable interest in efficiency improvements. traditionally, filtration employs granular media, such as sand, in either rapid or slow filters, depending upon the flow rate applied. in the second half of the 20th century, dual media configurations, including a layer of anthracite on top and occasionally an additional third thick layer of gravel, started to be employed. while these solutions are still widely used all over the world and have proved to be reliable and effective, recent changes to the legislation and a general push towards higher efficiencies are leading to research into other possibilities. these include not only modifications to the process and/or the application of new materials that allow higher treatment performance, but also lower costs and especially more energy efficient procedures. concerns about climate change are pushing utilities to adopt energy savings policies and to reduce the co2 emissions to the minimum compatible with high quality production. climate change also has an influence on the process itself, as it causes a variation in the concentration and in the physico-chemical characteristics of the contaminants. for example, increasing temperatures leads to increases in the rates of solubilization and the decomposition of the compounds, with changes to the features that make the removal of contaminants more difficult [3]. more control over the influent and the process characteristics could present a solution. an optimization of the processes could, however, provide optimal removal and compliance with the required effluent concentration, regardless of the load imposed by the influent. for these reasons, researchers have been working towards improving the efficiency of the filtration processes which are currently employed. several approaches have been taken. on the one hand, the filtration has been focused on the employment of more effective alternative media. on the other, modifications have been performed on the process itself, departing from the traditional granular media filtration towards the application of membranes and fibres. the latter solution, though becoming more widespread with a consequent reduction in costs, remains relatively expensive and is generally used in limited sites. application is generally sought where specific issues related to the raw water make it desirable and where other, less costly, solutions have proved to be ineffective. even in that case, however, rapid granular filtration is often performed as a roughing treatment to ensure the removal of contaminants that could endanger the integrity of the membranes. this paper reviews the filtration process and its role in water treatment first. secondly, in the supplementary materials, we provide reviews on the standards for safe drinking water, since water treatment targets to meet legislations of safe drinking water, which are a driving force of developing new treatment technologies. moreover, we brief mathematical modules for predicting the performance of media filtration as they are one of the most important aspects of discussing filtration for water treatment. finally, we focus on the cases of applying alternative types of filter media; which are more likely to be used in existing filtration structures without requiring major infrastructure changes. 2. filtration for water treatment 2.1. filtration process filtration is one of the core processes in water treatment. the term refers to the removal, mainly by physical action, of suspended solids as the suspension flows through a bed packed by granular media. if a coagulant is added, colloids can be removed at the same time and the range of detained particles increases considerably. filtration focuses mainly on turbidity, colour, microorganisms and particulates, whether already present in the water or formed via pre-treatment [4,5]. the particles involved are considerably smaller than the grain size, as shown on the right-hand side of figure 1.
تنقية المياه هي عملية ميكانيكية أو فيزيائية لفصل الجسيمات العالقة والغروية عن السوائل (السوائل أو الغازات) عن طريق وضع وسيط لا يمكن أن يمر إلا من خلاله السائل. المتوسط المستخدم هو عموما مادة حبيبية يمر من خلالها الماء. في عملية معالجة المياه التقليدية، عادة ما يتبع الترشيح التخثر والتلبد والترسيب.
Last Update: 2023-03-17
Usage Frequency: 1
Quality:
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