Suzhou's innovative "photovoltaic + water purification plant" integration model reduces carbon emissions by more than 2,000 tons every year
Suzhou City, Jiangsu Province recently held a high-quality development conference for the new energy industry to "Gather global resources and create a trillion-level new energy industry." The distributed photovoltaic project of Suzhou High-tech Baidang Water Purification Plant was released at the meeting as the top ten application scenarios and the first batch of typical cases of new energy in Suzhou City.
It is reported that Baidang Water Purification Plant is located in Hushuguan, Suzhou High-tech Zone. Viewed from the sky, the sewage treatment pool of Baidang Water Purification Plant is equipped with patches of "shed roofs", which are continuous photovoltaic panels. This is the first cable structure flexible bracket distributed photovoltaic water purification plant upper cover project in Jiangsu Province, and will be grid-connected for power generation in December 2023.
The "water-light integration" model of "photovoltaic + water purification plant" is the distinctive label of this photovoltaic project. According to Wei Jun, director of Baidang Plant of Suzhou High-tech Water Purification Co., Ltd., this sewage treatment plant has a large area of water treatment ponds and consumes a large average annual electricity. The photovoltaic project uses the biochemical pool and other areas above the plant area to install photovoltaic panels, which has unique space advantages. Data shows that about 80% of the electricity generated by the power station is used for the operation of water purification plant equipment, and the remaining 20% of the electricity is merged into the national power grid.
The reporter noticed that the "innovative cable structure flexible support" is the technical support for the perfect presentation of the project. Because the underground pipe network in the factory is very complex, how to effectively utilize the limited site space and build a sufficiently strong and safe photovoltaic matrix has become an urgent problem for the construction team.
To this end, the construction team used advanced means such as simulation to support a huge steel strand skeleton with a height of 10 meters and a longest span of about 25 meters above the pool, and laid photovoltaic panels on the steel structure skeleton. In the end, the project construction team used about 25,000 square meters of space above the pool in the plant to build the top-floor project of the distributed photovoltaic water purification plant, with a total installed photovoltaic capacity of 3.032 MW.
"The combination of innovative models and advanced technologies enables the project to achieve the highest energy efficiency and lowest energy consumption, achieving a 'win-win' situation between economic and ecological benefits." Wei Jun calculated that the photovoltaic system is expected to generate an average of 3 million kilowatt-hours per year, which is equivalent to saving 915 tons of standard coal and reducing carbon dioxide emissions by 2,287.5 tons per year, helping the Baidang Water Purification Plant save energy and reduce emissions and achieve new green production goals.
In the southeast corner of the water purification plant, a small door is pushed open to find a "garden" with a unique sky-here, the stream is gurgling, the blue sky reflects white clouds, and beside the narrow stream, there are lush water and grass and shady trees. This is not an ordinary "garden", but a tail water wetland of a water purification plant. This surface flow wetland, covering an area of 23800 square meters, is built relying on the narrow flood control embankment green space on the south side of the factory.
It is understood that 40,000 tons of treated tail water flows through the wetland area from the water purification plant every day. Through the rapid flow of the water body, the tail water is oxygenated and aerated to remove anaerobic microorganisms and harmful substances, activate aerobic microorganisms, and maintain Water body activity. At the same time, the filler layer in the wetland cooperates with aquatic animals and plants to purify them to remove pollutants in the water body and effectively reduce the pollution load. This process makes full use of the natural ecology, maximizes the purification effect of wetlands, successfully realizes the transformation of tail water discharge from "engineering water" to "ecological water", and further improves the quality of incoming river water.
