3. A filter has been designed to have a run length of 48 hours while operating at a filtration rate of 12 m/h. The design backwash rate is 40 m/h, backwash duration is 15 min, and filter-to-waste duration is 10 min. The plant operator decides to clean the filters more thoroughly and backwashes at a rate of 55 m/h for 25 min. As a result, ripening takes longer and the filter-to-waste duration is 50 min. Calculate the UFRV, UBWV, UFWV and recover y (a) as designed and b) as operated. What is the percent increase in the volume of treated water lost as waste backwash and filter-to-waste water?

3. A filter has been designed to have a run length of 48 hours while operating at a filtration rate of 12 m/h. The design backwash rate is 40 m/h, backwash duration is 15 min, and filter-to-waste duration is 10 min. The plant operator decides to clean the filters more thoroughly and backwashes at a rate of 55 m/h for 25 min. As a result, ripening takes longer and the filter-to-waste duration is 50 min. Calculate the UFRV, UBWV, UFWV and recover y (a) as designed and b) as operated. What is the percent increase in the volume of treated water lost as waste backwash and filter-to-waste water?

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: What is the solids loading on the filter assuming an influent TSS = 20 mg/L?

A: Step 1: Step 2: Step 3: Step 4:

Q: Calculate how much additional aeration volume (expressed as a percentage) is required to upgrade a…

Q: An organic matter is degrading in a steady state complete mix type reactor following the firstorder…

Q: A groundwater treatment plant adds chlorine to oxidize iron and manganese for removal by filtration.…

A: Given pH at 10oC = 7.8 t10 time through filtration = 1.8 min t10 time during peak pumpage = 8 min…

Q: 1. The required reactor detention time, 0. 2. The reactor basin volume, V, in m³. 3. The net waste…

Q: The 550-bed Atlanta Hospital has a small, activated sludge plant to treat wastewater from the…

A: Given, V = 10 m x 10 m x 5 m N = 550 q = 1.50 m3 per day per bed To find : Aeration time

Q: 4. What does the analytical scale read? (Ans: 1.550 g) 5. What is the concentration of the Total…

A: Given, Flow rate (Q) = 20 mgd Volume (V) = 90 ml or 0.09 L

Q: In activated sludge system, SRT is governed by

A: Activated sludge system:

Q: A trickling filter plant treats 1500 cum per day of sewage with a BOD5 of 220 mg/L and a suspended…

Q: An MSW (Municipal Solid Waste) sample weighs 5 kg. Total energy content of the waste sample…

A: An MSW (Municipal Solid Waste) sample weighs 5 kg.Total energy content of the waste sample collected…

Q: Design a trickling filter system for BOD removal without the nitrification requirement, to treat…

A: Given,Average flow of waste water=200 m3/dInfluent BOD = 200 mg/LInfluent Ammonia = 42…

Q: 12.60 The aeration tank for a completely mixed aeration process is being sized for a design waste-…

A: The objective of the question is to calculate the volume of the aeration tank, aeration period, food…

Q: A 2-tank Step Aeration Activated Sludge (SAAS) system has the following characteristics: V1 V2 Q…

A: Step 1:Mean Cell Residence Time and Hydraulic Residence Time: Given…

Q: Trickling filter is a fixed-bed biological reactor that operates under aerobic conditions. It is…

Q: ) Calculate the organic loading rate of the trickling filter in lb BOD/day/1000 ft3 with the data…

A: INTRODUCTION; Trickling filter is designed to remove waste material from the waste water sample. It…

Q: Calculate the anthracite diameter for a deep-bed anthracite filter of 1.5m with a porosity of 42%.…

A: Given: The depth is 1.5 m. The porosity is 42%. The headloss is 1.8 ft. The filtration rate is 13.5…

Q: A filter is designed with the following specifications. The anthracite and sand have densities of…

A: A filter is designed with the following specifications. The anthracite and sand have densities of…

Q: P to a secondary plant that The town of Gatesville has been directed to upgrade its primary" can…

A: Flow = 0.150m3.s-1BOD5 = 84.0mg.L-1 =100 mg.L-1Kd = 0.050day-1

Q: A trickling filter plant treats 1500 m³/day of sewage with a BOD, of 220 mg/l and a suspended solid…

Q: 12. What is the pH of the solution containing 2.5 X 10 of OH- at 25°C?

Q: An existing single-stage rock trickling filter treats a wastewater flow of 3785 m/d ("raw" influent…

Q: - An aerobic digester with a total capacity of 50,000 ft³ stabilize waste-activated sludge from an…

Q: wet sludge contains 3% solid by weight is pumped to a filter belt press at the rate of…

A: wet sludge contains 3% solidFilter rate = 170,000 lb/dayTo calculate the amount of nitrogen (lb/day)…

Q: 12.61 A step-aeration activated-sludge sys an air supply of 1200 ft/lb of BOD level. The measured…

Concept explainers

Integrated Solid Waste Management

Integrated Solid Waste Management (ISWM) is a thorough waste suppression, compost, removal and recycling Program. An effective ISWM system considers how to suppress, manage and recycle solid waste in a manner that is most efficiently to protect human health and the surrounding. ISWM system requires evaluation of public wants and demands and then selecting and merging the most effective waste management activities for the proposed demands. The main ISWM activities for solid waste management are Waste prevention, Recycling and Composting, and Combustion and Removal and waste collection in a properly planned, constructed, managed and mitigated landfill areas. Each of these requires careful designing, financing, accumulation, and delivery of activities.

Question

3. A filter has been designed to have a run length of 48 hours while operating at a filtration rate of 12
m/h. The design backwash rate is 40 m/h, backwash duration is 15 min, and filter-to-waste duration
is 10 min. The plant operator decides to clean the filters more thoroughly and backwashes at a rate
of 55 m/h for 25 min. As a result, ripening takes longer and the filter-to-waste duration is 50 min.
Calculate the UFRV, UBWV, UFWV and recover y (a) as designed and b) as operated. What is the
percent increase in the volume of treated water lost as waste backwash and filter-to-waste water?

Expert Solution

This question has been solved!

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

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1 Introduction

VIEW

Step 2 Solution

VIEW

Step 3 Final answer

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps

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

using thCNK Tormulas. 4 Consider the feasibility of treating the wastewater from the town of Nancy (Problem 12.31) in a single-stage trickling-filter plant, as diagrammed in Figure 12.21, using high- density cross-flow media with a specific surface area of 42 ft²/ft³. Use the same filter sur- face area as calculated for stone-media filtration in Problem 12.31 (A = 4600 ft²) and a recirculation ratio of 0.5. The design wastewater temperature is 15°C. As determined from laboratory testing, the soluble (filtered) BOD of the primary effluent is 100 mg/l or less, compared to the unsettled unfiltered BOD of 160 mg/l. The soluble effluent BOD concen- tration of trickling-filter plants treating similar wastewaters is approximately 50% of the unfiltered BOD concentration. From pilot-plant studies and full-scale experience, the manufacturer of the cross-flow media recommends a reaction-rate coefficient at 20°C of 0.0030 (gpm/ft2)0.5 for a media depth of 6.6 ft (2.0 m). From these data, calculate…
True/False questions. 1 For filtration process: when the water level rises to the point that the filter bed must be cleaned. This point is called terminal head loss ( 2 As the temperature decreases the detention time in 7 slow-mix tank decreases. ( 6 8 When CO₂ is bubbled in water with carbonate buffer system, the pH will decrease slightly and the reaction will shift to the left. ( ) 9 The lower the water turbidity, the higher the allowable ) scour velocity in sedimentation tank.( For mixed-media filter the layer of garnet is used to catch the very fine particles ( 3 The addition of polymers in coagulation process is called inter-particle bridging. ( ) ) 4 Slow-mixing can be accomplished by hydraulic As the weir lengths become shorter the scouring velocity becomes higher ( jump ( ) ) 5 Water with high turbidity requires more coagulant 10 Aluminum sulfate has a wider pH range for effective to be treated. ( coagulation than fèrric salts ( )
C A trickling filter plant treats 1500 cum per day of sewage with a BOD, of 220 mg/L and a suspended solid concentration of 250 mg/L. Estimate the total solid production assuming that primary clarification removes 30% of BOD and 60% of influent solids. Take the solid production in the trickling filter as a 0.5 kg/kg of the applied BOD.
I need a step by step process on solving this homework question.
As an operator of a wastewater treatment facility, you have learned that your plant runs well at an SRT (based on MLVSS (X) in the aeration basin) of 12 days. If today’s MLVSS (X) concentration is 2,700 mg/L and the RAS (Xr) concentration is 5,500 mg/L, how many L of sludge should you waste from the secondary clarifier today? Other design conditions: Average influent flow = 12,000 m3/d Influent soluble BOD = 150 mg/L Required effluent TSS = 30 mg/L Aeration tank Volume = 1,000 m3