Projects: Wastewater Treatment Plants (WWTP)

Abuja (Nigeria) Wastewater Treatment Plant

General Background

This W.W.T.P serves the city of Abuja, the Capital of the federal republic of Nigeria. During its first phase of construction the W.W.T.P will serve a population of 700,000, and will be expanded in the future. BJIS prepared the general and the detailed designs including process, civil, mechanical, electrical, and control engineering and the general construction supervision.

Basic Design Data
Average Design Flow (m³/day): 131,200
Average B.O.D. Load (Kg/day): 66,000
Effluent Quality (BOD/TSS/N): 15/20/10

Liquid Process and Facilities				Sludge Process and Facilities
Main Process B.N.R Activated Sludge, low f/m (high S.R.T)				Main Process Aerobic Stabilization
Facilities				Facilities
3 Archimedes pumps Φ2.4m Coarse screens Fine screens				Stabilization within reactors (high S.R.T)
Grit removal				Sludge tank
Oxidation ditches with 72 mammoth rotor aerators - 3,500 Kw				G.B.T. units for thickening
Final clarifiers				Earth lagoons for dewatering
U.V. disinfection of effluent. Effluent are discharged to river Wupa

Afula Wastewater Treatment Plant

General Background

Afula W.W.T.P serves the municipality of Afula, population of 60,000, and some of the near-by army facilities.. The plant was built in the late 90's and will be upgraded in the future in order to improve sludge stabilization in order to comply with the Israeli standards for sludge treatment and disposal. The effluents are reclaimed for unrestricted agriculture use. BJIS provided complete design services including general design and detailed design, and general supervision of construction.

Basic Design Data
Average Design Flow (m³/day): 10,000 Average B.O.D. Load (Kg/day): 3,850
Effluent Quality (BOD/TSS/N): 15/20/10

Liquid Process and Facilities		Sludge Process and Facilities
Main Process Activated Sludge, low F/M (high S.R.T)		Main Process Aerobic Stabilization
Facilities		Facilities
Bar screens		Stabilization within reactors
grit removal		Sludge tank
Oxidation ditches with Orbal disc aerators		B.F.P. for dewatering
Final clarifiers

Akko Regional Waste-water Treatment

General Background

This W.W.T.P serves 8 municipalities having a population of 175,000. The plant was constructed under a B.O.T contract. BJIS prepared the general and detailed designs including process civil, mechanical, electrical and control engineering and provided the general supervision of construction.

Basic Design Data
Average Design Flow (m³/day): 28,200
Average B.O.D. Load (Kg/day): 13,000
Effluent Quality (BOD/TSS/N): 15/15/10

Liquid Process and Facilities		Sludge Process and Facilities
Main Process B.N.R. Activated Sludge		Main Process Anaerobic digestion, sludge dewatering, bio-gas utilization
Facilities		Facilities
Bar screens		2 Drums for W.A.S thickening
Grit removal		2 anaerobic digesters, 1,700 m³ each for the stabilization of the thickened W.A.S. and the primary sludge. Digesters are mixed by the unique "Rotamix" system
Primary clarifiers
B.N.R. Activated sludge reactors with diffused aeration system		2 Decanter centrifuges for the dewatering of the digested sludge
Final clarifiers		Co-generation system for the utilization of the bio-gas including co-generation unit having 500kW electric capacity
Effluent filtration and disinfection. Effluent will be used for unrestricted agriculture use.

Akko Regional Waste-water Treatment

General Background

This W.W.T.P serves 8 municipalities having a population of 175,000. The plant was constructed under a B.O.T contract. BJIS prepared the general and detailed designs including process civil, mechanical, electrical and control engineering and provided the general supervision of construction.

Basic Design Data

Average Design Flow (m³/day): 28,200
Average B.O.D. Load (Kg/day): 13,000
Effluent Quality (BOD/TSS/N): 15/15/10

Liquid Process and Facilities		Sludge Process and Facilities
Main Process B.N.R. Activated Sludge		Main Process Anaerobic digestion, sludge dewatering, bio-gas utilization
Facilities		Facilities
Bar screens		2 Drums for W.A.S thickening
Grit removal		2 anaerobic digesters, 1,700 m³ each for the stabilization of the thickened W.A.S. and the primary sludge. Digesters are mixed by the unique "Rotamix" system
Primary clarifiers
B.N.R. Activated sludge reactors with diffused aeration system		2 Decanter centrifuges for the dewatering of the digested sludge
Final clarifiers		Co-generation system for the utilization of the bio-gas including co-generation unit having 500kW electric capacity
Effluent filtration and disinfection. Effluent will be used for unrestricted agriculture use.

Ein Bokek (Dead Sea) Waste-water Treatment Plant

General Background

Ein Bokek W.W.T.P serves all of the hotels and the touristic facilities along the Dead-Sea areas of Ein-Bokek, Hamey-Zohar and Neve-Zohar, as well as the Tamar regional council. The plant was originally built in the early 80's and was expanded in the late 90's due to the accelerated construction activities in the touristic zones. The plant consists of the original module plus two new modules. A significant challenge in the plant's design was the very high salinity value of the incoming wastes, due it's proximity to the Dead Sea. The process designed by BJIS successfully addressed this challenge. The effluents are re-used for public gardening along the streets surrounding the hotels. BJIS provided general design and complete detailed design services for the original construction, and for the expansion.

Basic Design Data
Average Design Flow (m³/day): 5,100
Average B.O.D. Load (Kg/day): 1,700
Effluent Quality (BOD/TSS/N): 15/15/10

Liquid Process and Facilities:		Sludge Process and Facilities:
Main Process Activated Sludge, low F/M (high S.R.T)		Main Process Aerobic Stabilization
Facilities		Facilities
Bar screens		Stabilization within reactors (high S.R.T)
grit removal
Oxidation ditches with Orbal disc aerators		Sludge tank
Final clarifiers		B.F.P. for dewatering
Effluent filtration and disinfection

Haifa Regional Waste-water Treatment Plant

General Background
This W.W.T.P serves 11 municipalities with a population of 800,000. The treatment plant was originally built in the early 60's for a population of 225,000 and was the first municipal sewage treatment plant in Israel. The first expansion and upgrading of the W.W.T.P took place in the mid 70's to increase its capacity for a population of 560,000. The second upgrading and expansion took place in the late 90's to increase its capacity for a population of 800,000. BJIS prepared the general and detailed designs of the first and second expansion including process, civil, mechanical, and electrical and control engineering, and provided general supervision of the construction.

Basic Design Facts
Average Design Flow (m³/day): 120,000
Average B.O.D. Load (Kg/day): 69,000
Effluent Quality (BOD/TSS/N): 15/15/10

Liquid Process and Facilities		Sludge Process and Facilities
Main Process B.N.R. Activated Sludge		Main Process Anaerobic digestion, sludge dewatering, bio-gas utilization
Facilities		Facilities
3 Archimedes pumps Φ2.4 m		7 G.B.T. units for W.A.S. thickening
Bar screens		8 anaerobic digesters, 3,700 m³ each, for the stabilization of the thickened W.A.S. and the primary sludge. Digesters are mixed by gas mixing system.

Grit removal units
Primary clarifiers		9 B.F.P. units and 1 decanter centrifuge for the dewatering of the digested sludge
B.N.R. Activated sludge reactors with low-speed surface aerators -3,500kW
Final clarifiers		Co-generation system for the utilization of the bio-gas including 2 co-generation units, each having 1,300 Kw electric capacity
Effluent disinfection ,The effluent are reclaimed for unrestricted agriculture use

Karmi'el regional Waste-water Treatment Plant

General Background
This W.W.P.T serves 13 municipalities with a population of 210,000. The plant was built in the late 90's for an average design flow of 22,000 m³/day and for a population of 150,000. It is currently being expanded for an average design flow of 36,500 m³/day and for a population of 210,000. BJIS provided the general design and complete detailed design services for both phases of construction, as well as the general supervision of construction.

Basic Design Data
Average Design Flow (m³/day): 36,500
Average B.O.D. Load (Kg/day): 17,000
Effluent Quality (BOD/TSS/N): 15/15/10

Liquid Process and Facilities Sludge Process and Facilities

Main Process B.N.R. Activated Sludge Main Process Anaerobic digestion, sludge dewatering, bio-gas utilization

Facilities Facilities

Bar screens

G.B.T. units for W.A.S thickening

Grit removal

4 anaerobic digesters, 2,500 m³ each, for the stabilization of the thickened W.A.S and the primary sludge. Digesters are mixed by mechanical mixing

Primary clarifiers

B.N.R. Activated sludge reactors with low-speed surface aerators for the first 2 modules and diffused air system for the new module

B.P.F. and decanter centrifuges units for the dewatering of the digested sludge

Final clarifiers

Co-generation system for the utilization of the bio-gas including 1 co-generation unit having 470kW electric capacity

Effluent filtration and disinfection (not by BJIS)

Effluent are reclaimed for unrestricted agriculture use

Qyriat Shemona Regional Waste-Water Treatment Plant

General Background
The plant serves the municipalities of Qyriat Shemona, Metula, and several rural villages in the Upper Galilee regional council, with population equivalent of 50,000, and was built in 2000. The plant consists of semi-intensive facilities, i.e. a combination of anaerobic and aerated earth lagoons. BJIS provided general design and complete detailed design services as well as general supervision of construction.

Basic Design Data
Average Design Flow (m³/day): 14,500
Average B.O.D. Load (Kg/day): 5,150
Effluent Quality (BOD/TSS/N): 15/15/10

Liquid Process and Facilities:		Sludge Process and Facilities:
Main Process Multi stage aerated lagoons		Main Process Anaerobic Stabilization
Facilities		Facilities
Bar screens		Settled sludge is an aerobically disintegrated to ash at the bottom of the anaerobic lagoons
Anaerobic earth lagoons
2 - Stage aerated lagoons

Maa'yan Zvi Waste-water Treatment Plant

General Background
This W.W.T.P (presently under construction) serves the municipalities of Zikhron-Ya'aqov, Fureidis, and several of the rural villages belonging to the Hof-Carmel regional council, with a population of 45,000. BJIS provided the general design, complete detailed design services, and the general supervision of construction.

Basic Design Data
Average Design Flow (m³/day): 9,000
Average B.O.D. Load (Kg/day): 3,500
Effluent Quality (BOD/TSS/N): 10/20/15

Liquid Process and Facilities:		Sludge Process and Facilities:
Main Process B.N.R. Activated Sludge without primary clarifiers	Main Process Aerobic Stabilization
Facilities	Facilities
Bar screens	Sludge tanks
Grit removal	Drum thickeners for W.A.S. thickening
B.N.R. Activated sludge reactors with diffused aeration system		Aerobic sludge digesters with diffused air system
Final clarifiers	Decanter centrifuges for the dewatering of the stabilized sludge

Migdal Haemeq Waste-water Treatment Plant

General Background
This plant is a part of the regional project for the reuse of effluent in the Izrae'l valley. The plant serves the municipality of Migdal Haemeq, including it's extensive industrial area and several rural villages of the Izra'el regional council, with a population equivalent of 100,000. The plant was built in 1995. The plant consists of semi-intensive facilities, i.e. a combination of anaerobic and aerated earth lagoons. BJIS provided general design and complete detailed design services as well as general supervision of the construction.

Basic Design Data
Average Design Flow (m³/day): 15,000
Average B.O.D. Load (Kg/day): 7,000 Effluent Quality (BOD/TSS/N): 50/70/N.R

Liquid Process and Facilities:	Sludge Process and Facilities:
Main Process Multi stage aerated lagoons	Main Process Anaerobic Stabilization
Facilities	Facilities
Bar screens	Settled sludge is an aerobically disintegrated to ash at the bottom of the anaerobic lagoons
Anaerobic earth lagoons
2- stage aerated lagoons

Nir Etzion Waste-Water Treatment Plant

General Background
This W.W.T.P (presently under construction) serves the municipalities of Ir-Karmel and several rural villages of Hof-Carmel regional council, with a population of 60,000. BJIS provided general design and complete detailed design services, as well as the general supervision of construction.

Basic Design Data
Average Design Flow (m³/day): 10,000
Average B.O.D. Load (Kg/day): 4,000
Effluent Quality (BOD/TSS/N): 15/20/15

Liquid Process and Facilities:	Sludge Process and Facilities:
Main Process B.N.R. Activated Sludge without primary clarifiers	Main Process Aerobic Stabilization
Facilities	Facilities
Bar screens	Sludge tanks
Grit removal	Drum thickeners for W.A.S. thickening
B.N.R. Activated sludge reactors with diffused aeration system		Aerobic sludge digesters with diffused air system
Final clarifiers	Decanter centrifuges for the dewatering of the stabilized sludge

Ra'annana Filtration Plant

General Background
Ra'annana SBR WWTP produces secondary effluent quality. BJIS was assigned to design the filtration plant producing tertiary quality effluent (including integration of the existing disinfection facility). The plant is based on the Pressure Filtration Technology with a dual filtration media of intricate and quartz sand. The filtration components were manufactured by Amiad Filtration Systems. The facility is presently at the running-in stage. BJIS prepared the general and detailed designs including process, civil, mechanical, electrical, and control engineering, and provided general supervision on site.

Basic Design Data
Average Design Flow- first stage (m³/hr): 7,500
Average Design Flow - second stage (m³/hr):10,500
Influent Quality (BOD/TSS/P) (mg/l): 20/20/10
Effluent Quality (BOD/TSS/P) (mg/l): 10/10/5

Liquid Process and Facilities
Main Process Pressure Filtration Technology
Facilities
Operational Reservoir
Filtration Pumping Station
Filtration Plant
Disinfection Plant
Tertiary Effluent Storage Reservoir
Tertiary Effluent Pumping Station
Effluent will be used for unrestricted agriculture use or disposed to the adjacent stream.	Backwashing water will be returned to the process inlet at the existing W.W.T.P.

Shafdan (Greater Tel-Aviv) Sludge Treatment Facilities

General Background
The Shafdan WWTP presently treats approximately 370,000 cubic meters of wastewater per day, contributed by the entire Dan (Greater Tel-Aviv) Region. The wastewater is biologically treated by the Activated Sludge process, characterized by a short sludge age, typically 3 days (SRT), while the waste activated sludge (WAS) is discharged to the sea through an outfall pipe. According to a recently formed environmental policy, the discharge of WAS to the sea will be discontinued, and replaced by an alternative system of sludge disposal. BJIS prepared the general and the detailed designs of the sludge thickening and dewatering facility which will be required for any following process which will be selected for the sludge disposal. The services included process, civil, mechanical electrical, and control engineering, and general supervision of construction.

Basic Design Data
Volume of Waste Activated Sludge - WAS (m³/day): 25,600 - 32,000 WAS Solids Weight (Ton dry solids/day): 192

Sludge Thickening	Sludge Dewatering
Design Data 25,600-32,000 cum/day 1,280-1,600 cum/hr 0.75%-0.6% solids concentration 196 ton/day solids (dry matter) 9.6 ton/hr solids (dry matter) Thickened sludge conc.: 4%-5%	Design Data 3,840-4,800 cum/day 192-240 cum/hr 5%-4% solids concentration 196 ton/day solids (dry matter) 9.6 ton/hr solids (dry matter) Dewatered sludge conc.: 18%-24%
Facilities	Facilities
Eleven (11) G.B.T units Polymers facility P.C feed and thickened sludge pumps Electrical and control	Five (5) decanter centrifuges Polymers facility P.C feed sludge pumps Special, high pressure P.C pumps for dewatered sludge Electrical and control

Tel-Adashim Regional Waste-water Treatment Plant

General Background
This plant is a part of the regional project for the reuse of effluent in the Izra'el valley. This plant serves the municipalities of Nazareth, Nazerat-Illit, Yafia and several rural villages of Izra'el regional council, with a population equivalent of 150,000. The plant was originally built in 1994 (1^st phase) and expanded during 2003 (2^nd phase). At present the plant consists of semi-intensive facilities, i.e. a combination of anaerobic and aerated earth lagoons. Due to more updated and stringent regulation for the quality of the effluent to be reused in the Izra'el valley, a new B.N.R activated sludge module, designed by BJIS is now under construction. BJIS provided general and complete detailed design services for both phases of construction, and currently designs the new B.N.T Activated sludge module.

Basic Design Data
Average Design Flow (m³/day): 15,000
Average B.O.D. Load (Kg/day): 7,000
Effluent Quality (BOD/TSS/N): 50/70/N.R.

Liquid Process and Facilities:	Sludge Process and Facilities:
Main Process Multi stage aerated lagoons	Main Process Anaerobic Stabilization
Facilities	Facilities
Bar screens	Settled sludge is an aerobically disintegrated to ash at the bottom of the anaerobic lagoons
Anaerobic earth lagoons
2- stage aerated lagoons

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