Can sewage be used to make energy?
It is easy to forget about how much we take our sewage systems for granted. In our line of work at blocked drain Bristol, you certainly never take a working sewage system for granted. The systems in place are there for much more than to just get rid of our waste. There are new plans in action to use the waste that we flush away as valuable resources to generate energy. It may sound like a strange idea, but in reality it makes a great deal of sense and is hugely beneficial economically as well as environmentally. The main way in which waste is being used to make energy at the moment is anaerobic digestion.
When wastewater is sent through sewage systems, it eventually leads to settlement tanks. The tanks allow the water and waste to sit relatively motionless, which leads to the solid waste floating on the bottom of the tank. This waste is then scraped off and used for many different things, including fertiliser, compost, and anaerobic digestion.
Anaerobic digestion is a process that involves using microorganisms to break down the waste and biodegradable material without using oxygen. The result of the process of breaking down these materials is the production of bio gas, primarily methane and carbon dioxide. These gases can be made into electrical and thermal energy, and can be used as a renewable source of energy to displace fossil fuels like coal and oil.
There are many other benefits to using anaerobic digestion. The process requires less energy and less chemicals, and the cost of handling the sludge from the settlement tanks is much lower than aerobic digestion methods.