The design flow for a water treatment plant (WTP) is 1 MGD (3.8x10' m' /d). The rapid mixing tank will have a mechanical mixer and the average alum dosage will be 30 mg/L. The theoretical mean hydraulic detention time of the tank will be 1 minute. Determine the following: a) the quantity of alum needed on a daily basis in kg/d, b) the dimensions of the tank in meters for a tank with equal length, width, and depth, c) the power input required for a G of 900 sec' for a water temperature of 10 °C. Express the answer in kW, given that u = 1.307 x 10³Kg/m.s.

The design flow for a water treatment plant (WTP) is 1 MGD (3.8x10' m' /d). The rapid mixing tank will have a mechanical mixer and the average alum dosage will be 30 mg/L. The theoretical mean hydraulic detention time of the tank will be 1 minute. Determine the following: a) the quantity of alum needed on a daily basis in kg/d, b) the dimensions of the tank in meters for a tank with equal length, width, and depth, c) the power input required for a G of 900 sec' for a water temperature of 10 °C. Express the answer in kW, given that u = 1.307 x 10³Kg/m.s.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Related questions

Q: Please solve all points

A: 1.1 Proper F/M (Food to Microorganism) ratio in a conventional activated sludge process typically…

Q: A water-treatment plant is to process 30,000 m³/d. The rapid mixing tank will blend 35mg/l of alum…

A: The given data is shown below: Discharge=30,000 m3/dAlum dose=35 mg/lDetention time=2…

Q: Circular clarifiers are used to remove solid materials from water. They allow continuous treatment…

Q: A municipal wastewater sample is brought to the laboratory to determine the BOD5. The DO in the…

Q: The 500-bed hospital has a small activated sludge plant to treat its wastewater. The average daily…

Q: Oil with density of (925 kg/m3 ) (9 = 0.00001 m2/s, and Q = 0.2 m3/s) is flowing through 500m pipe…

Q: A WASTEWATER TREATMENT PLANT OPERATING PRIMARY SETTLING TANKS GETS IN INFLOW OF 12.96 MILLION LITRES…

A: Answer We are given Flow rate Q = 12.96 MLD Influent suspended solid concentration Cin = 280 mg/l…

Q: The design flow for a water treatment plant (WTP) is 7.2 x 103 m³/d. The rapid mixing tank will have…

A: Given Data:The design flow for the WTP is Q=7.2x103 m3/day.The average alum dosage is da=50 mg/L.The…

Q: A 60-mm diameter pipe contains glycerin (SG=1.26) flowing at 8.5 m^3/h.(1 atm = 101.325 kPa) a)…

A: Solution: (a) Flow rate, Q=8.5 m3/h=2.36×10-3m3/sDia of pipe, d=60 mmArea,…

Q: Exercise-2 A surface water treatment plant is to process 30000 m'/d for a large city. A cubic rapid…

A: Given: Water Demand= 30000 m3/day Dose of Alum= 35 mg/L Detention time= 2 minutes Viscosity =…

Q: Complete the following problems dealing with rapid mix tanks and flocculation basins: 1. Design a…

A: Note : Since you have asked multiple question, we will solve the first question for you. If you want…

Q: 8. The upper portion of an inverted U-tube is filled with oil having a pecific gravity of 0.98. The…

A: Determine the pressure difference (PB - PA).

Q: A wastewater stream A with 200 m3 /h of flow rate an mixes with stream B having flow rate of 400m3/h…

Q: A completely mixed activated sludge process operating at equilibrium is designed to treat 300 MLD of…

Q: 7 Homework 1. Dervie and prove Table 2. 9.1 Water injection is carried out in a 50 ft thick, 300 ft…

A: Note : Since you have asked multiple questions, we will solve the first question for you. If you…

Q: An oil of viscosity 0.02 Ns/m2 is flowing between two stationary parallel plates 1 m wide maintained…

A: Given data - Viscosity of oil = 0.02 Ns/m2 Distance between plates = 15 mm Velocity midway btw…

Q: Exercise 4 A treatment plant has the following process diagram. Determine the flow rate expression…

A: Step 1:The plant uses a Bardenpho ™ process, which is a type of activated sludge process.The process…

Q: Design a gravity thickener to concentrate the mixture of sludge obtained from primary and secondary…

A: Given: Sludge waste flow rate in the primary settling unit= 140 m³/d; Sludge waste concentration in…

Q: A smooth concrete pipe with a 1.5 ft diameter carries carbon tetrachloride at 20 C from a tank to a…

A: Given Diameter of pipe=1.5ftDepth of the tank=3ftDistnace of dicharge,L=1mile=5280ft

Q: Calculate the minimum fluidization velocity for an anthracite bed having following characteristics;…

A: Given d90 = 2.9 mm, Density of anthracite = 1600 kg/m3, Density of water = 998 kg/m3 at 20°C;…

Q: Determine the elevation difference, Ah, between the water levels in the two open tanks shown in the…

Q: An industry has decided to treat its process wastewater in a biotower with a plastic modular medium…

A: Given: The flow rate of the waste water is 1400 m3/day. The BOD5 is 630 mg/l. The depth of the…

Concept explainers

Storm Sewers and Detention

The storm drains system transports rainwater or stormwater and other runoff from roads, parking lots, and roof downpipes directly to nearby creeks, rivers, or the sea without any treatment.

Question

Q1:
The design flow for a water treatment plant (WTP) is 1 MGD (3.8x10 m³ /d). The
rapid mixing tank will have a mechanical mixer and the average alum dosage will
be 30 mg/L. The theoretical mean hydraulic detention time of the tank will be 1
minute. Determine the following: a) the quantity of alum needed on a daily basis in
kg/d, b) the dimensions of the tank in meters for a tank with equal length, width,
and depth, c) the power input required for a G of 900 sec' for a water temperature
of 10 °C. Express the answer in kW, given that u = 1.307 × 10³Kg/m.s.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Step by step

Solved in 3 steps with 3 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.

Similar questions

The design flow for a water treatment plant (WTP) is 7.2 x 10³ m³/d. The rapid mixing tank will have a mechanical mixer and the average alum dosage is 50 mg/L. The theoretical mean hydraulic detention time of the tank is 1.5 minutes. Determine the followings: (i). The quantity of alum needed on a daily basis. (ii). The dimensions of the tank in meters for a tank with equal length, width, and depth. (iii). The power input required for a G of 1000 s¹ for a water temperature of 25°C.
Q.5. The design flow for a water treatment plant (WTP) is 1 MGD. The rapid mixing tank will have a mechanical mixer and the average alum dosage will be 35 mg/L. the theoretical mean hydraulic detention time of the tank will be 60 seconds. Determine the following: 1-The quantity of alum needed on a daily basis in kg/d, 2-The dimensions of the tank in meters for a tank with equal length, width and depth, 3- The power input required for aggo Go of 900 seê' forawa te Tempreature of lóc (M=1•307*15°N• s/mz express The a $is wer in kw
The design flow for a water treatment plant (WTP) is 4000 m3/d, the rapid mixing tank will have a mechanical mixer and the average alum dosage will be 50 mg/l. The theoretical mean hydraulic detention time of the tank will be 60 second and the depth is 1.4 m. Design a circular rapid mixing tank and determine the quantity of alum needed.
A completely mixed activated sludge process operating at equilibrium is designed to treat 300 MLD of waste water. The influent and effluent BOD are 200 mg/1 and 18 mg/1 respectively If the F M then the hydraulic retention time is A 0.125 day B 4.21 hours C 8.42 hours D 0.225 day = 0.3 and MLSS is 3800 mg/1,
2. (a) Design a gravity thickener to concentrate the mixture of sludge obtained from primary and secondary settling units in an activated sludge wastewater treatment plant. Make appropriate assumptions in your calculations. Sludge waste flow rate in the primary settling unit= 140 m³/d; and concentration = 2.5% Sludge waste flow rate in the secondary settling unit= 350 m/d; and concentration = 0.6% Qi ci Solids Loading Rate (SLR) = 40 kg ds / m².d, and SLR : A ci Qi Tc Expression for thickening zone depth= 0.75Cu A Ci: Incoming mixed sludge concentration Qi: Incoming mixed sludge flow rate A: Cross section area of the thickening tank Cu: Target underflow concentration (=5%) Tc: Time in compression zone (=2 days)
For a spiral membrane filtration system, the membrane was fabricated by adding additional shims to the flow channel to increase the depth of the channel by 30% (the flow rate remains unchanged). What impacts will be on the crossflow velocity? A. increase by about 23% B. increase by about 13% C. decrease by about 23% D. decrease by about 13%
(a) A groundwater borehole at USM engineering campus contains 3000 mg/L of TDS. The flow is 0.32 m3 /s. The design TDS concentration of the product water is below 400 mg/L. The net pressure is 40 atm. The membrane manufacturer provides that the membrane has a water flux rate coefficient of 2.2 x 10-6 s/m and a solute mass transfer rate of 1.5 x 10-6 m/s. Calculate the membrane area required for the RO system. (B) A water treatment at Nibong Tebal receiving a raw water contains a concentration of 0.5 µg/m3 atrazine from Kerian River. In order to comply with the drinking water quality guideline, the treatment plant should reduce the concentration of Atrazine to 0.1 µg/L. If the dosing of powdered activated carbon have been applied before the coagulation, calculate the minimal dose of PAC in mg/m3 .
a) An activated sludge plant with recycle is evaluating its secondary clarification system. Settling column tests are conducted and analyzed for settling velocities at different initial solids concentrations. The data are provided below. The plant flow rate is 10,000 m3/d, with a recirculation ratio of 0.5. The MLSS in the reactor is 4000 mg/L. The desired underflow concentration is 17,000 mg/L. Solids concentration mg/L Settling velocity m/h 1500 6.5 3000 5.1 4500 4 6000 2.95 7500 2 9000 1.4 12,000 0.5 15,000 0.27 17,000 0.2 b) Design secondary clarifiers for the activated sludge plant of problem a), with a recycle ratio of 0.6. Calculate the required surface area if two clarifiers are used. Also calculate underflow rate, underflow velocity, and overflow rates. Clearly state your assumptions.
Given:Flow rate of water = 500 L/minSuspended solids concentration in influent water = 100 mg/LRequired effluent suspended solids concentration = 10 mg/LFiltration rate = 10 m^3/m^2/hrFiltration tank dimensions: Length = 5 m, Width = 3 m, Depth = 4 mCalculate:o Calculate the total suspended solids (TSS) load in the influent water:o Calculate the filtration tank surface area:o Calculate the required filtration tank capacity:o Calculate the required detention time in the filtration tank: Q2) DisinfectionGiven:Flow rate of water = 2000 m^3/hChlorine residual required in effluent = 0.5 mg/LInitial chlorine concentration in influent water = 2 mg/LChlorine decay rate in disinfection tank = 0.05 per hourDisinfection tank volume = 300 m^3Calculate:o Calculate the chlorine demand in the influent water:o Calculate the chlorine dosage required:o Calculate the chlorine dosage rate:o Calculate the actual chlorine dosage rate considering chlorine decay:
Given the required grout hydraulic head is 10 m, the head of the grout pipe is 1.5m above the ground. The injection point is at a depth of 4 m. The groundwater is 2m above the injection point. Calculate the required grout pressure.
a. A stream has an average stream velocity of 0.92 [m/s] and an average depth of 1 [m]. Calculate the reaeration coefficient (Kr) at 20 C. b. Assume atmospheric pressure, 20° C temperature, and no stream contamination. Suppose the stream has an average chloride concentration of 5000 [mg/I]. What is the expected dissolved oxygen saturation concentration for the stream? c. With the same assumptions and conditions, the stream is receiving BOD contamination from an unknown source. If you have measured the dissolved oxygen (DO) in this stream and your DO probe reads 6.62 [mg/l]. How much is the DO deficit for this stream?
1. A wastewater is treated in an aerobic CSTR with no cell recycle. The following hold: Ks= 50mg/l; q^=5mg/mg VSSa-d; Kd= .06d-1; Y= 0.6; S°=220mg/l; fd= 1 a. Determine Ɵcmin, Ɵclim, Smin