Project Overview

The  33 million advanced anaerobic digestion (AAD) scheme at Bran Sands, Teesport, converts sewage sludge into energy and is currently the largest plant of its kind in the UK. The plant uses thermal hydrolysis, which relies on injections of live steam to kill the pathogens in the sludge. Raw sludge is loaded into stainless steel vessels and the steam is injected to hold the contents at 165 C and 6Bar.

The sludge is then cooled and fed into three 7,600m3 concrete tanks, where methane-generating microbes digest it anaerobically for up to 18 days. The resulting methane is collected and used to fuel gas engines, providing a renewable source of electrical energy.

Northumbrian Water required an extensive refurbishment and demolition survey to be undertaken to allow plant upgrade and replacement works to take place. This 3 week project involving a team of 2 Lucion Surveyors was completed on time and in budget.

Work within a waste water treatment facility posed particular challenges to our survey teams with respect to potential microbial contamination when surveying the open sewage stages of the process.

Our Method Statement took account of this through risk assessment, selection of appropriate PPE and post work clean down procedures. Surveyors had to work alongside live operational plant and employed careful daily planning with client representatives to ensure safe working and no potential impact on the production process.