design of a municipal water treatment plant The following treatment processes are commonly used in municipal drinking water treatment: Coagulant addition-flocculation tank Deep-bed sand filter Disinfectant addition-contact basin • Granular activated carbon sorption unit • Sedimentation basin (a) State the purpose and means of functioning of each unit,

design of a municipal water treatment plant The following treatment processes are commonly used in municipal drinking water treatment: Coagulant addition-flocculation tank Deep-bed sand filter Disinfectant addition-contact basin • Granular activated carbon sorption unit • Sedimentation basin (a) State the purpose and means of functioning of each unit,

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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(a) Explain the advantages of a membrane bioreactor (MBR) system in advanced wastewater treatment. If a typical activated sludge treatment works is retrofitted to incorporate an MBR process, explain how wastewater and sludge treatment lines in the treatment works need to be modified. (b) Calculate how much additional aeration unit volume is required to upgrade a BOD removal activated sludge plant under the following conditions: I. Good nitrification performance by increase in Solids Retention Time (SRT). II. 80 % increase in SRT (Solids Retention Time) is achieved by 40 % reduction in sludge waste flow rate. III. Mixed Liquor Suspended Solids (MLSS) concentration in aeration unit and settled solids concentration is unchanged.
The wastewater from a synthetic textile manufacturing plant is discharged to a municipal treatment plant for processing with domestic wastewater. The characteristics of the synthetic textile wastewater are 1500 mg/L BOD, 2000 mg/L SS, 30 mg/L nitrogen, and no phosphorus. The characteristics of the domestic wastewater are 200 mg/L BOD, 240 mg/L SS, 35 mg/L nitrogen, and 7 mg/L phosphorus. Find the BOD, SS of the mixture. The ratio of flow rate is domestic/textile = 4/1
1.) These re process in a water treatment plant except: a. Collection of water from watershed b. Coagulation c. filtration d. sedimentation 2.) Which of the following is the fastest way by which you can get safe drinking water? a. Boiling b. Collecting rainwater c. forest d. watershed and dam 3.) Which of the following does NOT help collect and or store water? a. Aquifer b. Concrete roads and parking lots c. forest d. watershed and dam
Problem: You are designing a 20 mgd wastewater treatment plant. To characterize the plant's influent solids, the lab used 90 ml samples of the ty[ical wastewater and the following equipment: Solids: Lab Equipment Evaporation Dish Gooch crucible 2.0-micron paper filter 2.0-micron Whatman GF/C filter Lab Measurement Dish + Residue after evaporation 4. Weight 54.2830g 54.2170g 1.5240g 1.6948g 1. The lab placed a sample in an evaporation dish and evaporated it at 105°C finding that the dish weighted 54.3490 g after the dish cooled. What is the concentration (mg/L) of the Total Solids (TS) in the influent?(Ans: TS = 733.3 mg/L) 54.349g 2. If you anticipate a Total Suspended Solids mass loading of 48,400 lb/day at this flow rate, what is the concentration of TSS you anticipate in the influent? What does the analytical scale read? 3. The lab then filtered a sample through a 2-micron filter and evaporated the filter at 105°C, what was the mass of the residue found on the filter paper after it…
(b) Identify, from the list, below the primary purpose of each of the following wastewater treatment processes: i) Grit chamber ii) Addition of ferric chloride (after activated sludge treatment) iii) Trickling filters iv) Equalization basins removal of suspended BOD removal of soluble BOD removal of discrete particles such as coffee grinds and sand removal of nitrate removal of phosphate removal of small particles not removed during secondary clarification removal of small particles not removed during primary clarification damping of flow and BOD loading
a) Draw a neat sketch of Activated Siudge Process and discuss how SVI, return sludge wasted sludge and organic load effect the design of aeration tank in activated sludge process?
H2. Evaluate the similarities and differences between sewage treatment process against industrial wastewater treatment process in terms of typical characteristics of the influent to be treated, process treatment involved, the effluent from the system and the quality of the sludge generated from these two treatment processes.
• An average operating data for conventional activated sludge treatment plant is as follow:- • Wastewater flow =35000m³/d, volume of aeration tank =10900m2, influent BOD to aeration tank=162.5mg/l, effluent BOD=20mg/I, mixed liquor suspended solids32500mg/l. Based on the information above determine: - Aeration period, F/M, BOD load ,Percentage efficiency of BOD removal.
CIVIL ENGINEERING (ii) A treatment plant disposes 50 MLD of treated effluent into a river. The river flow rate is 20 m³/s and its DO is 8 mg/L before the mixing point. If the BOD of the effluent is 50 mg/L, find the BOD and DO of the river water at the d/s of mixing point. Assume BOD of river water as 0 and DO in WW effluent as 0.
1. Differentiate biological treatment from tertiary treatment of waste water. 2. Identify and elaborate the different methods of water treatment used for different chemical wastes in water.
'O: Find out the volume of an anaerobic digestion tank for 5 MLD of domestic wastewater treatment plant having 60% suspended solid removal efficiency of primary clarifier and 250 mg/L suspended solids in wastewater based on sludge volume reduction in digester. Moisture content of influent sludge is 96%; initial volatile solids content in sludge is 70%; volatile solids destroyed is 65% digested sludge solid concentration is 8.0%; specific gravity of primary sludge is 1.03; specific gravity of digested sludge is 1.04; density of water is 1000 kg/m³; mean cell residence time is 15 days.
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