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Home Courses Sanitary engineering Course materials Lectures W02b – Sedimentation: primary & secondary

W02b – Sedimentation: primary & secondary

Course subject(s) W02b – Sedimentation: primary & secondary

In this lecture, ass. prof. De Koning discusses the sedimentation process focussing on process parameters of primary sedimentation.
The parameters inluencing the sedimentation tank performance on suspendes solids and BOD removal are presented, i.e. particle characteristics, water temperature, detention time, depth, horizontal flow velocity, scouring, wind effects, inlet construction, outlet construction, flow characteristics (turbulence, stability) and sludge removal. These parameters are further presented in a design example.
In the last part of the lecture secondary sedimentation is discussed in comparison with primary sedimentation.

Physical processes - Sedimentation: primary & secondary

Content

Slides

 Video
Introduction
Primary sedimentation
Size, shape, density, concentration
Temperature
Flocculation
Scouring
Wind effects
Inlet zone
Outlet zone
Reynolds & Froude
Sludge collection & removal
BOD & TSS removal
Example
Secondary sedimentation / Clarification		 1
2
3
4 – 5
6
7 – 8
9
10 – 11
12 – 13
14
15
16
17 – 21
22 – 24		 00:00
00:31
02:20
05:06
08:19
09:44
15:40
16:26
18:39
24:47
26:25
27:07
28:11
36:32
Creative Commons License
Sanitary Engineering by TU Delft OpenCourseWare is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Based on a work at https://ocw.tudelft.nl/courses/sanitary-engineering/.
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