A sample of 1 litre is drawn from the aeration tank and is then allowed to settle for 30 min. The settled sludge occupies 300 ml at the bottom. This sludge, when dried, is found to have a mass of 3.2 g. The Sludge Density Index is mg/ml (round off to two decimal places).

A sample of 1 litre is drawn from the aeration tank and is then allowed to settle for 30 min. The settled sludge occupies 300 ml at the bottom. This sludge, when dried, is found to have a mass of 3.2 g. The Sludge Density Index is mg/ml (round off to two decimal places).

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: P.C. V, X, S S.C. Qs Xg, Sp Act. Sludge Basin RAS Q, S, Xp WAS Qw, Sun Xw

A: 1. V=5222 m3 2. Qw=121.8 m3/day 3. Qe=25798.2 m3/day 4. t=4.8 hours

Q: After conventional filtration, the filtered water with turbidity less than 0.5 NTU, pH =7 and T=5 C…

A: Answer We need to find log reductionCCo from figure(11.20 a) using 4 Mgd and figure (11.20 b) Let…

Q: A two litre graduated cylinder was used to determine the Sludge Volume Index (SVI) of an activated…

A: Volume of cylinder: 2 litersSettled volume: 800 mlMLSS concentration =2800 mg/ltTo find SVI of…

Q: There is a sewage sludge with volume containing a certain moisture content p, (percent). What will…

Q: An analysis for determination of solids in the return sludge of activated sludge process was done as…

A: Mass of crucible = 62.485 gmVolume of sample = 75 ml Oven dried mass = 65.020 gm Mass of sample…

Q: Using Rihet equation, estimate aeration tank Volume (V) based on the following conditions:…

A: GIVEN- Saturation constant (Ks) = 80 mg/L microbial decay coefficient (kd) =0.15/d maximum specific…

Q: For a sand filtration device, the flow rate of the influent is 30 m3/day with the sand filter area…

A: Given:- The flow rate of the influent is 30 m3/day The sand filter area of 10 m2 To determine:-…

Q: Sedimentation tank is used for a flow rate of 0.2 m3/s and has dimensions 32m x8m x4m. The density…

A: Given: Flow rate, Q = 0.2 m3/s Length, L = 32 m Width, B = 8 m Depth, H = 4 m Density of particles =…

Q: A WWTP with activated sludge secondary treatment receives 0.290 m / s of flow from the primary…

A: Answer We are given flow rate Qo = 0.290 m3/s microbes concentration the aeration basin X = 2500…

Q: Based on the Sieve Analysis results for filter media given below: Size of Opening (mm) Cumulative…

A: Given the results of Sieve analysis test results for filter media. The effective size = d10 : It is…

Q: A settling chamber is to be used to collect particles with a density of 1200 kg/m3 from an air…

A: A settling chamber is to be used to collect particles with a density of 1200 kg/m3 from an air…

Q: A complete-mixed activated sludge process is to be designed to treat 5.0 MGD of primary effluent…

A: Flow rate= 5 MGD Primary effluent BOD5 = 180 mg/ L

Q: Q2: A column analysis for an activated sludge su MLSS Conc (mg/l) Settling velocity m/h 1000 2.8…

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

A sample of 1 litre is drawn from the aeration tank and is then allowed to settle for 30 min.
The settled sludge occupies 300 ml at the bottom. This sludge, when dried, is found to
have a mass of 3.2 g. The Sludge Density Index is
mg/ml (round off to two
decimal places).

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: Given

VIEW

Step 2: Calculation

VIEW

Solution

VIEW

Step by step

Solved in 3 steps with 2 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 TOC of a wastewater sample is 75mg/L. what is the ultimate BOD of the sample. The organic matters in the sample are assumed completely degradable.
Need complete solution with explanation
Given a settling tank operating at 80% TSS removal efficiency, an inflow of 0.5 m3/s, and an influent concentration of 100 mg/L. Assuming steady state operations, at what flow would operators have to remove sludge in order to achieve a TSS concentration of 1500 mg/L in the sludge? Answer: 0.027 m3/s
1. The following information is provided for an activated sludge system design: Parameter Symbol Value Units Flow rate Q 10000 m³/d Influent BOD So 150 mg/L Effluent BOD S 2 mg/L Hydraulic residence time Ꮎ 4 hr Mean cell residence time Oc 6 d Maximum specific growth rate μm 3 1/d Half saturation constant Ks 40 mg/L Yield coefficient Y 0.5 Endogenous decay coefficient b 0.08 1/d Death rate coefficient γ 0.04 1/d Determine: a) The aeration tank biomass concentration (X) in mg/L b) The aeration tank oxygen requirement in kg/d c) The rate of biomass wasting in kg/d
A complete-mixed activated sludge process (CMAS) is to be designed to treat 6.0 MGD of primary effluent having a BOD5 of 190 mg/L. The requirement is that the effluent BOD5 and TSS concentrations be 20 mg/L or less on an annual average basis. The following biokinetic coefficient obtained at 15°C: Y = 0.6 mg VSS/mg BOD5, k = 2.85 d-1, Ks = 70 mg/L BOD5, and kd = 0.041 d-1. Assume that the MLVSS concentration in the aeration basin is maintained at 2,500 mg/L. Determine: a. The minimum MCRT (d) b. The MCRT necessary to meet the requirement (d) c. The volume of the aeration basin (ft3)
A rectangular settling basin has a depth of 3 m, a length of 40 m and a width of 6 m. The water treated in the basin has a flow rate of 500 L/s and contains 50 mg/L of type a particles, 100 mg/L of type b particles and 180 mg/L of type c particles (particle type letters refer to the particles listed in problem 1). What is the suspended solids concentration in the effluent from the settling basin? Determine the overall percent removal of suspended solids from the water achieved by the settling basin.
9-2 (15 pts) Determine the alkalinity, total hardness, carbonate hardness, and non-carbonate hardness (in mg/L CaCO3) for the water (pH 7.4) with the following chemical concentrations. Calculate the doses of lime and soda ash to soften this water. Constituent Concentration, mg/L Ca2+ 95 Mg2+ 13.5 Na 25.8 HCO3 244 SO 2- 73 CI 67.8 H2CO3 7.7