What is the sludge volume index, Civil Engineering

Assignment Help:

What is the Sludge Volume Index?

Two 1 L samples of mixed liquor are taken from a lagoon. After settling for 30 min in a graduated cylinder, 250 mL of solids have settled out in the first sample. The total suspended solids concentration (MLSS) in the second sample is found to be 2300 mg/L.

(a) What is the sludge volume index?

(b) What is the theoretical required sludge recycle rate?  

Ans:

(a) From eq for SVI, SVI = 1000Vsettled, mL/L/ Xmg/L

= (1000mg/g)(250ml/L)/2300mg/L = 109mL/g

(b) From Eq for, R = Vsettled, mL/L/ 1000-Vsettled, mL/L

250mL / 1000mL - 250mL = 0.33


Related Discussions:- What is the sludge volume index

Seismic joints, is the seismic joints like falling joints ? thanks :)

is the seismic joints like falling joints ? thanks :)

Sieve analysis - soil mechanics and foundations, Sieve Analysis - Soil Mech...

Sieve Analysis - Soil Mechanics and Foundations a. Sieve Analysis used to obtain the grain size distribution of coarse-grained soils (sands and gravels) larger than 0.075 mm (r

Chain, describe and sketch a survey chain

describe and sketch a survey chain

Soil particles for geotechnical design, Question Will it worthwhile to ...

Question Will it worthwhile to take out tests on particle density of soil particles for geotechnical design? Answer Particle density of soils is definite by ratio of

Evlaute width and depth for stable alluvial canals, Q. Evlaute width and de...

Q. Evlaute width and depth for stable alluvial canals? Lacey originally evolved width and depth formulae for stable alluvial canals. These were the following.  P = 4.836 Q 1

Internal energy, For a system   Q =W+ ΔE where ΔE is the change in E,...

For a system   Q =W+ ΔE where ΔE is the change in E, the stored energy in the  ΔE system. E has various forms   1. Kinetic Energy 2. Potential Energy Work do

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd