Describe different causes responsible for water-borne diseases. Name the diseases caused by presence of various impurities. What are the preventive measures that can be taken to stop the spreading of these diseases? T

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Problem 2. The consumption of nitrates in drinking water is a particular concern for young children. Nitrates are a problem in agricultural areas of the Midwest due to fertilizer runoff. Compare the CDI over a one-year period for a 1-year-old child and an adult female consuming drinking water with a nitrate concentration of 10 mg/1. Use the EPA recommended values shown in Table 3-8.

Q1.Clearly indicate if each of the following is True or False 1) The amount of bypassed water in split treatment of hardness depends on material balance on Mg². 2) Most water treatment plants in Iraq are using polymers as a coagulant. 3) In drinking water, most of alkalinity comes from SO4². 4) Circle or ring system is the most common method used now to design water distribution systems. 5) Fecal Coliforms and E-Coli are generally pathogenic and we need to test them to avoid their diseases. 6) In flocculation process, we need rapid mixing to enhance formation of flocs for better settlement. 7) In filtration, the only mechanism involved is the straining. 8) It is better to travel downhill, avoid rush hours, and avoid left turn when designing a route for packers. 9) Ozone in Stratosphere layer helps prevent UV light from reaching earth and causing skin problems. 10) Transfer station is used to transfer solid waste to final destination in more efficient way.

You are provided with the following information about a municipal wastewater treatment plant. This plant uses the traditional activated-sludge process. Assume the microorganisms are 55 percent efficient at converting food to biomass, the organisms have a first-order death rate constant of 0.050/day, and the microbes reach half of their maximum growth rate when CE 3059 Page 2 of 2the BOD5 concentration is 10.0 mg/L. There are 150,000 people in the community (their wastewater production is 225 L/day-capita, 0.10 kg BOD5/capita-day). The effluent standard is BOD5 = 20 mg/L and TSS = 20 mg/L. Suspended solids were measured as 4,300 mg/L in a wastewater sample obtained from the aeration tank, 15,000 mg/L in the secondary sludge, 200 mg/L in the plant influent, and 100 mg/L in the primary clarifier effluent. The mean cell residence time is 4.0 days. a. What is the design volume of the aeration basin in cubic meters?b. What is the aeration basin detention time? c. How many kg of secondary dry…