What is the best part of a typical relaxing summer day? Nothing is better than sitting in an armchair with a beer and some chips in your hand, enjoying the great comfort.
The much-loved combination of beer and chips is being exploited for the first time to deal with climate change. Chips firm Walkers has adopted a technique it says will cut CO2 emissions (排放) from its production process by 70%.
The technology will use CO2 captured from beer processing in a brewery (啤酒厂), which is then mixed with potato waste and turned into fertilizer. It will then be spread on UK fields to feed the following year's potato crop. Creating fertilizer normally produces high CO2 emissions, but the technology adopted by Walkers makes fertilizer without generating CO2. So, the beer-and-chips combination performs a double function. It stops the emission of brewery CO2 into the atmosphere — and it saves on the CO2 normally generated by fertilizer production.
This Creative win-win solution was developed with an approval from the UK government by a 14-employee start-up called CCm. The fertilizer was experimented on potato seed beds this year, and next year Walkers will install CCm equipment at its Leicester factory to prepare for its 2022 crop.
A decision has not yet been made on which brewery Walkers will work with on this. The new technology adds to carbon-saving techniques already under way. The firm has installed an anaerobic digester (厌氧消化池), which feeds potato waste to bacteria to produce a useful gas. The gas is burned to make electricity for the chip-frying process — so this saves on burning gas or coal.
The new system will go a step further by taking away potato "cake" left after digestion — and mixing the brewery CO2 into it to make an enriched fertilizer which will help put carbon back into the soil as well as encouraging plant growth.
It's an example of scientists finding ways to use CO2 emissions which otherwise would increase the over-heating of the planet.
