Element Consulting Engineers (Pty) Ltd

The Emonti Green Hub

The project provided a viable alternative to the current practices of discharging raw sewage and industrial wastewater into the ocean by demonstrating a viable alternative to the unlicensed discharge of 10million litres per day of industrial wastewater, raw sewage and sewage sludge into the surfzone at Hoodpoint. South Africa currently discharges over 300 million litres per day of industrial wastewater and raw sewage into the ocean and so this project will pave the way to address the mitigation of these present practices of marine pollution.

The technical feasibility study concluded that it is possible to divert the discharge of sewagevfrom the ocean, and further that this is economically viable when combined with the codigestion and processing of organic waste diverted from the overburdened regional landfill site at Roundhill. This approach resulted in the Emonti Green Hub concept, which is essentially a one stop shop to recover valuable energy, nutrients, water resources from wastewater, sewage sludge and the organic fraction of municipal solid waste including garden refuse. This is done using a novel combination of mature technologies that includes upflow anaerobic sludge blanket (UASB) reactors, continuously stirred tank reactors (CSTR}, high rate algal ponds, gasification and invessel composting, to produce biomethane, electricity, heat, biofertilizer and process water.


South Africa, East London

Total Project Budget

EUR 308 259

EEP Africa Financing

EUR 188 259




Feasibility study

Project Period

2012 - 2014