EUA soalan Question 1 Soalan 1) a) Turbidity and fine suspended solids in raw wa
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EUA soalan Question 1 Soalan 1) a) Turbidity and fine suspended solids in raw water need to be removed to a certain limit before being supply to consumers. Discuss in brief how do the turbidity and (Kekeruhan dan bahan terampai halua dalam air mentah hendalah disingkirkan ke tahap tertentu suspended solids being remove at the water treatment plant sebelum dibelalkan kepada pengguna Bincangtan dengan ringkas hagaimanatah kekeruhan dan [10 Marks/Markah b) Universiti Malaysia Perlis (UniMAP) has planned to explore the underground water source for all residential colleges located in the Pauh Putra Campus Currently, there are only two residential colleges in Pauh Putra Campus as mention in Table Q1.1 Since UniMAP is expanding, the number of students are cpected to increase at maximum and minimum growth rate of 1.5% and 1.0% respectively. Calculate the water demand by the residential colleges at Pauh Putra Campus for year 2023 and 20218 ae Masia Perlia UMAP) selah merancang untuk mengekaplorasi sumber air bawah h koe ndomas d Kampo Pauh Patra seperti yang dinyatakan dalam Jasdual o11 indiaman d Kams Pawh Putra bag tahun 2023 dan 2028 kol indioman yang terlerak di Kampus Pauh Putra Terkini, harya terdapat dua berkembang hilangan pelajar dijangka meningkat masing has nkunnum dat minamum 1.5% and 1 0% Kirakan permintaan Un, MAP sedong aict roke ole Table Q1.1 (Jadual 0) Tun Abdul Razak Residential College Information Tunku Abdul Rahman Residential College Kolej Kediaman Tun Abl Kolej Kediaman Tu Razak 600 bhul Rahman 800 Number of room Balik Number of students/room Up to 4 students/room Up to 6 students room bul Service factor Per capita consumption Total current student (2018) 1 0096 120 liter/day 5800 maa 0018Explanation / Answer
a) Most of the big and visible objects, such s trees, branches, sticks, vegetations, fish, animal life, etc., present in waters of surface sources can be removed by screening. The courses suspended materials can then be removed by letting the water settle in sedimentation basins. The process is called plain sedimentation. The effectiveness of sedimentation may, however, be increased by mixing certain chemicals with water, so as to form flocculent precipitate, which carries the suspended particles as it settles. The process is called chemical coagulation. The finer particles in suspension, which may avoid settling in sedimentation basins even after using chemical coagulation, may then be removed by filtering the water through filters. This process is called as filtration. The filtered water which may still contain pathogenic bacteria is then made bacteria-proof by adding certain chemicals such as chlorine, etc. This process of killing of germs is called disinfection. The resulting water, though now becomes now become safe, yet may not be attractive to the tongue of the consumers. Unpleasant tastes and odors may then, therefore, have to be removed by adding certain chemical compounds such as activated carbon or by using ozone. This process is called aeration. The resulting water may sometimes be much harder than permissible and may, therefore, have to be softened by a process called softening. Sometimes, the resulting water may be given further treatment such as fluoridation ( i.e. the addition of soluble fluoride for controlling dental caries), liming (i.e. addition of lime in order to control acidity and reduced corrosive action), recarbonation (i.e. addition of carbon dioxide so as to prevent deposition of chemical carbonate scale), desalination (i.e. removal of excess salt, if at all present), etc.
b) Present population (P) = 5800
considering maximum rate of growth (r) = 1.5 % and also considering geometrical growth of population
=> Population after n years = P(1 + r%/100)n
=> Population after 5 years, i.e. foe 2023 = 5800(1 + 1.5/100)5 = 6249
=> Water demand for 2023 = 6249 * 120 *1.5 = 1124.82 m3/day (Considering 1.5 factor for maximum daily demand)
Population after 10 years, Population for 2028 = 5800(1 + 1.5/100)10 = 6732
=> Water demand for 2028 = 6732 * 120 *1.5 = 1211.76 m3/day (Considering 1.5 factor for maximum daily demand)
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