Powering a Greener Future
Today we visited Qingdao Xiaojianxi Waste-to-Energy Plant, a project of Wheelabrator. The plant uses the trash generated by the 3.5 million residents of Qingdao to create usable electricity. The visit continued the theme of many Chinas by showing the contrast between the high-tech, forward-thinking technology of the electric plant and the low-tech living conditions of the workers around the plant. Another striking feature was the speed of construction both of the plant and of the suburbs of Qingdao. It seems the cities in China are springing up out of nowhere, and in some cases they are.
The plant has three incinerators, each capable of burning 500 tons of trash per day. After it is burned, only 15% of the 1500 tons of trash is left over as slag, which can be used in construction materials. Sadly, the city of Qingado produces 3,500 tons of garbage per day. It seemed from our visit that the city of Qingdao has plans to build another waste-conversion plant in the future to help make up this 2,000 ton difference.
The plant picks up garbage from the nearby landfill and transports it back to the plant where it is weighed and dumped into a garbage pit. It is then picked up as needed and fed into the incinerator where it is burned at 1000 degrees centigrade. The heat generated by the burning waste boils the water in the boilers, turning it into high pressure steam. The steam powers the turbines, which power the generators, which create electricity. The plant sells the electricity to the local power grid.
Interestingly, the crucial equipment for the plant was imported from Europe. This was surprising given our common theme of indigenous innovation and intellectual property rights. It will be interesting to see whether any IP cases stem from this transfer of equipment in the future.
What stood out the most to me was something our host said at the end: “The project is a waste management project first, then it is an electricity project.” It is true that trash burns less efficiently than other energy sources, but with a burgeoning population, waste management is a leading challenge for the government of China. Simultaneously, providing enough electricity for the new businesses and the rising middle class is another problem. This project presents a potential solution on two fronts.
For the rest of the day we are free and we will likely visit the May 4th Square, birthplace of the People’s Revolution, and Tsingtao Brewery. The poli sci major in me is most excited about… both.
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