Transcript No Slide Title

II. Sewer Networks and Facilities
Topic. II. 12. Detention (Retention) Basins: Kinds
and Structures. Sewerage Pumping Stations
Detention Basins: Kinds
I. According to their technological function
 For first flush detention
 For hydraulic relief of the sewer network
 For wet weather regulation of inflow to the WWTP
II. According to their position in respect to the sewer main
 On the line of the sewer mains
 Of line the sewer mains
III. According to their structures
 Open air detention basins
 Underground (covered) detention basins
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Detention (Retention) Basins: Kinds and
Structures
Detention Basin on the Main Line with Gravity
Emptying: Longitudinal Section (Scheme)
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Detention (Retention) Basins: Kinds and
Structures
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Detention (Retention) Basins: Kinds and
Structures
Screw Pumping Station at the Of Line Detention Basin
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Detention (Retention) Basins Volume Determination
I. Graphical Determination
 I - local hydrograph
 Hatched area represents the
detention volume
 Qmax/2 - chosen permanent water
discharge from the detention
basin
II. Analytical Determination
V = Kdb.Qmax.to
V - detention basin volume
Kdb - detention basin coefficient
Kdb = 0.01 - 1,5; (Kdb = 0,25 - 0,55)
Qmax - hydrograph peak
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to - time to peak
Sewerage Pumping Stations
Purpose
I. Pumping Stations at the Sewer and Drainage Networks
 Rising sewer collector elevation
 Transportation of sewage and runoff to higher elevation
 Runoff discharge into receiving water
II. Pumping Stations at the Wastewater Treatment Plants
 Rising wastewater at the WTP inlet
 Sludge and wastewater transportation according to the technological
requirements
 Part of the sludge dewatering equipment
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Sewerage Pumping Stations (SPS)
Schemes Illustrating the SPS Purpose
a - Rising sewer collector elevation; б - Wastewater pumping transportation
1 - inlet sewer pipe; 2 - receiving chamber; 3 - machines hall; 4 - gravity sewer collector;
5 - pressure sewer pipe
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Sewerage Pumping Stations (SPS)
Schemes for SPS Structures with Submerged Pumps
a - pumps with horizontal axes; б - pumps with vertical axes
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Sewerage Pumping Stations (SPS)
Schemes for SPS Structures with Non-submerged Pumps
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Sewerage Pumping Stations (SPS)
Classical SPS with Horizontal Centrifuge Pumps
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Sewerage Pumping Stations (SPS)
1 - inlet sewer channels
2 - belt conveyor
3 - bar racks
4 - sluice gates
5 - overhead crane
6 - bridge crane
7 - electrical motor
8 - pumps
9 - barrel for wasted lubricate
10 - pressure pipes
11 - emptying pipe
12 - drainage pump
13 - pipes for suction of sediments
14 - service (water supply) pumps
15 - barrel
16 - service pipe
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Sewerage Pumping Stations (SPS)
SPS with Screw Pumps
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