Above: Visualisation of the new Riverside Energy Park energy from waste facility, alongside the existing EFW plant (source: Cory)


Following withdrawal of the London mayor’s judicial review claim against the government’s decision in favour of the Riverside Energy Park EfW project, Cory says it will now make “necessary preparations to start construction”, scheduled for next year. The project, with an anticipated installed power generation capacity of 96 MWe, received a DCO (development consent order) in April 2020.

The new plant – with a processing capacity of about 650 t/a of non recyclable waste per year – is to be built at Belvedere, south east London, adjacent to CORY’s Riverside Resource Recovery Facility (installed generating capacity 72 MWe), in operation since 2011.

The site is on the River Thames, which is used for transportation, significantly reducing the need for lorry waste collection.

Plans include roof mounted solar PV, battery energy storage and provision for CHP infrastructure to supply heat from both the EfW plants to local homes and businesses. Cory is partnering with Vattenfall to develop what is described as “one of the largest heat networks in the UK.”

An anaerobic digestion plant is also envisaged, able to treat about 40 000 t/a of food and green waste, generating up to 1 MW of electricity, heat or compressed natural gas (CNG) for vehicle fuel.

As with the Riverside Resource Recovery Facility, the technology provider and EPC contractor for the new plant is Switzerland-based Hitachi Zosen Inova.

Cory recently announced completion of a major upgrade of its existing Riverside facility. The improvement works, which were carried out between April and August 2020, included “measures to improve the reliability of the boilers and the associated tubing as they neared the end of their service life”, the company said.

During the upgrade, additional measures were put in place to keep workers safe, such as social distancing and a one-way system throughout the facility.

In total, six superheater 3 modules and six superheater 4 modules were replaced across the three process lines at the Riverside facility, and over 1500 m2 of Inconel 625 overlay installed.

Over one thousand safety documents were issued, Cory noted, with work to finalise a comprehensive electrical resilience plan for the facility also carried out.

The superheater modules were procured by Hitachi Zosen Inova and manufactured in Croatia and Russia, before being shipped to the UK by sea and installed by PJD Engineering. Installation of the modules required significant modification to the plant building to allow them to be lowered through the roof of the facility while minimising disruption to day-to-day operations. The lifting element of the project was provided by Ainscough Crane Hire, using a 750 t mobile crane.

Electrical resilience enhancements included: improvements to the air conditioning in the battery room to maximise the life of the batteries; modifying the DC system for additional redundancy, extending to 400% the redundancy of DC battery packs; and installation of an additional battery powered AC system to back up the steam turbine lubrication AC oil pump.

Projects proliferate

Hitachi Zosen Inova technology is now being used in no less than thirteen EfW projects in the UK, the most recent UK contract being that from a joint venture consisting of SSE Thermal and Copenhagen Infrastructure III K/S (a fund managed by Copenhagen Infrastructure Partners) for a plant to be constructed on the Slough Trading Estate, west of Heathrow airport.

The new Slough plant will process around 440 000 tonnes/a of mainly commercial waste from the Greater London Area. The installed electrical capacity will be around 46 MWe. In addition, the plant will export up to 23 tonnes/h of process steam to a nearby food factory.

The new EfW installation will be constructed on SSE’s existing site on the Slough Trading Estate, where parts of a former plant have been decommissioned and demolished. The former plant’s cooling tower will be integrated into the new facility, which has an anticipated operating date of 2024.

It will be the third EfW project that SSE Thermal and HZI have worked on together, the other two being Ferrybridge Multifuel 1 and 2.

Hitachi Zosen Inova also recently won the public tender to build the Newhurst EfW facility in Shepshed, Leicestershire, UK. The clients are a consortium consisting of waste management companies Covanta and Biffa, together with the Green Investment Group. Along with Dublin and Rookery South, it is HZI’s third collaboration with Covanta. HZI will serve as overall turnkey contractor, delivering the entire building construction, the procurement function and the technology for the Newhurst project.

The Newhurst EfW plant will provide 350 000 tonnes/y of treatment capacity for non-recyclable waste and will have an installed electrical capacity of 42 MWe. With electrical net efficiency of 31.3%, the installation will also be one of the most energy-efficient EfW plants in the world, says Hitachi Zosen Inova.

Among other recent EfW power plant successes recorded by Hitachi Zosen Inova is receipt from Alternative Generating Company (AGC)-1 (part of the RT-Invest Group) of the notice to proceed with construction of two new plants in the Moscow region, in partnership with its Russian consortium partner, Atomenergomash subsidiary ZiO-Podolsk.

Following contracts for plants in Voskresensk (to the south of Moscow) and Naro-Fominsk (to the west), the two latest installations, in Noginsk (to the east) and Solnechnogorsk (to the north), will take the total to four – with a combined treatment capacity of 2.8 million tons per year of municipal and commercial waste and installed generating capacity of 280 MW.

“Together these plants will play a key role in efforts to discontinue landfill and implement the Green Tariff, a nationwide programme launched in 2017 to promote renewable energy”, notes Hitachi Zosen Inova.

“For the Moscow area the switch from landfill to state-of-the-art EfW technology marks a major step in terms of efficient, hygienic, environmentally-friendly waste management,” says HZI’s CEO Bruno-Frédéric Baudouin.