Virus Forensic Services: Covid-19 Sewerage Surveillance



Statement of anticipated benefits

The following benefits are anticipated from the implementation of the project.

Alignment to DWS strategy

The DWS has a National Water Master Plan. This is integrated with the National Planning Commission to achieve greater harmonization with specific government priorities and strategies. The recent round of SIDS has shown the need to identify the many unbankable projects that already exist, and invest into the effort needed to make them bankable. This is what makes A-4-A unique, because a lot of effort has already been invested into those projects, yet they remain unbankable.

The overall DWS strategy is about achieving social justice through redistribution that is equitable and sustainable. This is a noble cause, but it is also technically complex. One specific aspect of the DWS strategy of direct interest to A-4-A is the immediate low-hanging fruit of non-revenue water, as that immediately improves financial efficiency at municipal level.

Another is the water reuse initiative, as this is viewed as a key element in the post-pandemic economic recovery. To achieve both of these objectives, municipalities are key, and the COVID-19 wastewater surveillance program presents as an important opportunity to begin assessing the 824 WWTW’s for investment consideration as water recovery plants.

High level process audits of WWTW’s

A-4-A will use the American Water Works Association (AWWA) capable plant model shown in Figure 2.3. The AWWA is in-line with the Green Drop Handbook.


A-4-A will assess the condition-performance of wastewater treatment works using the AWWA capable plant model shown above even though emphasis will be on the Mechanical and Electrical Infrastructure not so much on the process engineering (bio-chemical-physical).

Each process unit will be assessed, based on the process configuration and treatment systems in place. Assessment and system analyses will be done through modelling of mass balance, hydraulics flow regimes, water quality to name but a few, this will be done in order to assess if the WTW is able to meet the desired effluent standards. The plant will be modelled based on the original design if as-built drawings are available, if not, it will be modelled under current existing and projected conditions.

The intent of the modelling will be to evaluate if the current process configuration is performing well to meet the desired effluent.

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