CASE STUDY
Wastewater Treatment Plant for Northgate Estate in Harare, Zimbabwe
A flexible 3 MLD wastewater treatment plant designed to support Northgate Estate’s changing wastewater flows and produce treated water for irrigation reuse.
LOCATION
Harare, Zimbabwe
INDUSTRY
Residential Development
PLANT CAPACITY
3 MLD – 2 × 1.5 MLD Treatment Trains
FINAL WATER USE
Irrigation
PROJECT OVERVIEW
Flexible wastewater treatment for a growing residential development
Northgate Estate required a wastewater treatment solution capable of treating wastewater to a final quality compliant with Zimbabwe Standards. The development also required operational flexibility so that treatment capacity could be adjusted according to changing wastewater flows.
SewTreat proposed a 3 MLD wastewater treatment plant comprising two independent 1.5 MLD treatment trains. The system can accommodate wastewater flows from approximately 250 KLPD up to the full 3 MLD capacity, while the treated final water is designed for reuse in irrigation.
Wastewater Treatment Overview
TOTAL CAPACITY
3 MLD
CONFIGURATION
2 × 1.5 MLD Treatment Trains
OPERATING RANGE
Approx. 250 KLPD – 3 MLD
FINAL APPLICATION
Irrigation
THE CHALLENGE
Wastewater treatment capacity needed to scale with the development
Northgate Estate required more than a fixed-capacity wastewater treatment plant. As wastewater flows changed with the development, the treatment system needed to maintain reliable performance while allowing effective treatment capacity to be increased or reduced according to demand.
At the same time, the final treated water needed to meet the required Zimbabwe Standards and provide a suitable resource for irrigation reuse.
FLEXIBLE TREATMENT CAPACITY
Designed Around Changing Wastewater Flows
250 KLPD
Approx. lower operating capacity
3 MLD
Maximum treatment capacity
2 × 1.5 MLD
Independent treatment trains
IRRIGATION
Final water use
Harare, Zimbabwe | Residential Development
SEWTREAT’S SOLUTION
A 3 MLD wastewater treatment plant with two flexible treatment trains
SewTreat proposed a 3 MLD wastewater treatment plant comprising two independent 1.5 MLD treatment trains.
Each treatment train incorporates supplementary flow-through piping at the lower levels. This allows the effective treatment capacity to be reduced when required, giving Northgate Estate the flexibility to operate the plant according to actual wastewater flows rather than continuously operating at maximum capacity.
The configuration enables an operating range from approximately 250 KLPD up to the full 3 MLD capacity. Treated final water is designed to comply with Zimbabwe Green Normal Standards and can be reused for irrigation.
Operating capacity: approximately 250 KLPD – 3 MLD
SYSTEM CONFIGURATION
How the flexible wastewater treatment solution works
The two-train configuration allows Northgate Estate to match treatment capacity more closely with changing wastewater flows.
01
Two Treatment Trains
Two independent 1.5 MLD treatment trains provide a combined maximum treatment capacity of 3 MLD.
02
Supplementary Flow-Through Piping
Flow-through piping at the lower levels allows the effective capacity of each treatment train to be reduced when required.
03
Flexible Operating Range
The plant configuration can accommodate wastewater flows from approximately 250 KLPD up to 3 MLD.
04
Treated Water for Irrigation
Final treated water is designed to comply with Zimbabwe Green Normal Standards and can be reused for irrigation.
Learn more about how SewTreat’s wastewater treatment plants work.
PLANT BENEFITS
Flexible wastewater management for long-term development needs
The Northgate Estate wastewater treatment plant combines high treatment capacity with operational flexibility and the ability to reuse treated water for irrigation.
01
High-Capacity Treatment
Provides total wastewater treatment capacity of up to 3 MLD.
02
Independent Treatment Trains
Two 1.5 MLD treatment trains provide greater operational flexibility.
03
Flexible Flow Management
Accommodates flows from approximately 250 KLPD up to 3 MLD.
04
Standards-Aligned Final Water
Final water is designed to comply with the required Zimbabwe Standards.
05
Irrigation Reuse
Treated wastewater can be reused as a water resource for irrigation.
Talk To Sewtreat
Need a flexible wastewater treatment solution?
Speak to SewTreat’s water engineers about a wastewater treatment plant designed around your development’s flow requirements, treatment capacity, compliance requirements and intended final water use.