The document provides details of a sewage treatment plant project in Al Haer, Saudi Arabia. It summarizes that the project involves building a sewage treatment plant with a capacity of 640,000 cubic meters per day to treat raw sewage from the area. It is being constructed by Aziz Company Ltd. over a 4 year period and includes various treatment units and auxiliary buildings. Progress photos show ongoing construction and status updates are provided.

2. LAND ACQUISITION:LAND ACQUISITION:
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4. PROJECT DESCRIPTIONPROJECT DESCRIPTION
& CONTRACT SUMMARY& CONTRACT SUMMARY
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5. Description Of The ProjectDescription Of The Project
 Proposed Sewage Treatment Plant Phase-I, is located at southProposed Sewage Treatment Plant Phase-I, is located at south
of Riyadh in Al Haer district. Present contract is to build theof Riyadh in Al Haer district. Present contract is to build the
STP Phase-I withSTP Phase-I with capacity 640,000mcapacity 640,000m³³/day/day (168 MGD) peak(168 MGD) peak
flow andflow and 400,000m400,000m³³ /day/day (105 MGD) average flow.(105 MGD) average flow.
 MainMain contractorcontractor isis “Aziz Company Ltd.”“Aziz Company Ltd.” And he isAnd he is
responsibleresponsible toto design, construct, operate & maintaindesign, construct, operate & maintain the plantthe plant
forfor one yearone year..
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6. Raw Sewage:Raw Sewage:
 B.O.D5B.O.D5 300 mg/L300 mg/L
 C.O.DC.O.D 500 mg/L500 mg/L
 S.S.S.S. 300 mg/L300 mg/L
 TKN-NTKN-N 50 mg/L50 mg/L
 NH4-NNH4-N 40 mg/L40 mg/L
 Minimum Crude Sewage TemperatureMinimum Crude Sewage Temperature 2020ºCºC
 Maximum Crude Sewage TemperatureMaximum Crude Sewage Temperature 3535ºCºC
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7. Treated Effluent After Secondary Treatment:Treated Effluent After Secondary Treatment:
B.O.D5B.O.D5 < 20 mg/L (Monthly Average)< 20 mg/L (Monthly Average)
S.S.S.S. < 20 mg/L (Monthly Average)< 20 mg/L (Monthly Average)
Total NitrogenTotal Nitrogen < 20 mg/L (Monthly Average)< 20 mg/L (Monthly Average)
Fecal ColiformFecal Coliform <2.2 MPN per 100 ml<2.2 MPN per 100 ml
Treated Effluent After Tertiary Treatment:Treated Effluent After Tertiary Treatment:
B.O.D5B.O.D5 < 10 mg/L< 10 mg/L
S.S.S.S. < 10 mg/L< 10 mg/L
NitrogenNitrogen < 10 mg/L< 10 mg/L
Fecal ColiformFecal Coliform <2.2 MPN per 100 ml<2.2 MPN per 100 ml
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8. Sewage Treatment Units:
 Inlet lift pump station with coarse screens etc
 Pre-aeration Tank
 Grit and Grease Removal Tank
 Parshall Flumes
 Selector Tanks
 Aeration Tanks (Carousel Bio-reactor)
 Final Settling Tanks
 Tertiary Treatment Plants
 Chlorination Building
 Return Activated Sludge Pump Station
 Waste Activated Sludge Pump Station, Sludge Thickeners
 Sludge Dewatering Building Including Sludge Decanters, Sludge Dryer etc.
 Sludge Silo and Conveying System
 Odour Control Unit
 Process Pipe Work and Chambers etc.
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9. Auxiliary Building & Other Works:Auxiliary Building & Other Works:
 Control BuildingControl Building
 Generator BuildingGenerator Building
 Electrical SubstationsElectrical Substations
 Mosque, Workshop, Cafeteria & Health CentreMosque, Workshop, Cafeteria & Health Centre
 Administration and Laboratory BuildingAdministration and Laboratory Building
 Road WorksRoad Works
 Irrigation and Plantation etc.Irrigation and Plantation etc.
 Fire Fighting Pipe Networks and Hydrants etc.Fire Fighting Pipe Networks and Hydrants etc.
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11. Sewage Treatment Plant – Phase ISewage Treatment Plant – Phase I
Al HaerAl Haer
General Information:General Information:
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General InformationGeneral Information
Contract ValueContract Value SR- 293,432,279.00SR- 293,432,279.00
Project Start DateProject Start Date 18.10.142818.10.1428
Project Finish DateProject Finish Date 17.10.143217.10.1432
Execution PeriodExecution Period 4 Years4 Years
%age of Contract Period%age of Contract Period
Finished on (29.02.1432 H)Finished on (29.02.1432 H)
84.18 %84.18 %

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Cont’dCont’d
Value of revised masterValue of revised master
programme upto Safar 1432Hprogramme upto Safar 1432H
SR- 293,432,279.00SR- 293,432,279.00
%age of revised master%age of revised master
Programme upto Safar 1432H.Programme upto Safar 1432H. 72.23%72.23%
Total value of works executedTotal value of works executed
upto Safar 1432H (Estimated)upto Safar 1432H (Estimated) SR. 120,832,941.60SR. 120,832,941.60
% age of total works executed% age of total works executed 41.18 %41.18 %
% age of Civil Works Executed% age of Civil Works Executed 64.14 %64.14 %
% age of Mech. Works% age of Mech. Works
ExecutedExecuted
33.71 %33.71 %
% age of Elect. Works% age of Elect. Works
ExecutedExecuted
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13. PROGRESSPROGRESS
PHOTOGRAPHS:PHOTOGRAPHS:
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67. RAIN WATER FLOODRAIN WATER FLOOD
PROTECTIONPROTECTION
ARRANGEMENTS:ARRANGEMENTS:
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69. THANK’STHANK’S
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