Assignment 3 Fall 2013_SOLN_revised

05d 10610c 20c 003d at 17c determine 226 days assume

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: - 20C= 0.05/d (1.06)10C - 20C= 0.03/d At 17C -> Determine Ө Ө = 2.26 days Assume residence time does change At 10C Therefore the max effluent concentration will be exceeded. 3.) An aerated lagoon with a volume of 18,000 m3 is treating a wastewater with the following properties: Q = 2000 m3/day TSS = 150 mg/L VSS = 100 mg/L nbVSS = 50 mg/L bCOD = 200 mg/L The following biokinetic coefficients apply for the design conditions: k = 5 d-1 Ks = 35 mg bCOD/L Y = 0.4 mg VSS/mg bCOD kd = 0.08 d-1 fd = 0.15 mg VSS/mg VSS Estimate the following parameters: i.) Concentration of viable biomass (as VSS) in the aeration basin effluent Solution: Ө = V/Q = 18000m3/2000m3/d = 9d ii.) Concentration of growth-related VSS in the basin effluent Solution: Growth related biomass = Viable biomass + endogenous decay products XgrowthVSS = (1 + fdKd)Xm...
View Full Document

This document was uploaded on 02/10/2014.

Ask a homework question - tutors are online