Find potential energy savings
British water company Thames water (Thames water) recently baker, one of the largest sewage treatment works in Europe (Beckton) were evaluated, in search of potential energy saving measures.
The sewage treatment plant more than 400 ten thousand people produce waste water, through wind turbines, biogas power generation and other measures, the region has produced more than 50% of the energy.
However, the plant annual electricity costs more than 900 pounds.
Therefore, Thames Water (Thames Water) is located in the northeast of London sewage processing department for the 300 - acre site of all machinery and equipment, in order to find potential energy saving effect.
Aeration pipe adjustment
Surprisingly, they found that in the fourth activated sludge plant (ASP4) in a new aeration pipe with the best energy saving potential.
ASP4 activated sludge plant by double the amount of dissolved oxygen (DO) monitor, and improve the efficiency of pumping air into the tank of air blower, to achieve energy saving.
Thames water, said the continuous measurement of dissolved oxygen (do) to ensure the best working efficiency, high efficiency fan control, plus can achieve the goal of energy saving through reduce air consumption.
The real-time control of the equipment, and constantly monitor and adjust process, to ensure that it USES the least amount of energy, run in the best possible conditions.
Before the adjustment, the line of the air control valve failure may cause the image and aeration is not enough, not only will cause the process compliance issues, and the image will be a waste of energy, will also more bubble to the surface, make the bubble is superficial and diffusion.These valves are replacement for eccentric plug valve, so more suitable for the environment and the service life is longer.
Baker's team also by thermal hydrolysis process to maximize the power to save money, and replace all 15000 a third of the activated sludge plant dome diffuser.
The adjustment of activated sludge
Thames Water (Thames Water) North-East London operations manager David Finn's (David Fenech) said: "ASP4 is put into use in 2015, and so have good internal efficiency.As a result, the team quickly realized that, in their initial survey, this is the most potential was found surprising places.We are monitoring the situation of energy conservation, predict will have a more stable process."
"We will continue to monitor, and in all the activated sludge treatment plant for further energy saving."
Thames water of other projects have made progress, including dissolved oxygen monitoring maintenance and improvement of wastewater treatment, as well as to the ASP3 activated sludge aeration pipe inside the plant upgrading and reconstruction activities.
