Project background

Tong'an Duotou River in Xiamen City is one of the six black and odorous water bodies in the city. The small watershed of Daitouxi consists of two tributaries, Nishan River and Wulianxi River. The upstream of the two tributaries are hilly areas with good water quality. After entering the urban area, with the influx of industrial wastewater and domestic sewage, the water quality gradually deteriorates. After the two tributaries leave the city, the water quality continues to deteriorate due to the large influx of various pollutants downstream, the water color turns black and some sections become black. Odor is emitted, and garbage enters the river seriously in some sections. In recent years, the water quality of the river basin has been under the standard for a long time.

According to the Work Program on Water Quality Achievement and Water Quality Improvement in Daitouxi Watershed of Tong'an District, Xiamen City, released at the end of 2016, the task measures of water quality target inversion were taken to provide a landable and highly operational overall planning and technical support for water pollution prevention and control and water quality attainment in Daitouxi Watershed of Tong'an District, and the phased objectives and requirements were put forward.

Leaders and experts of Xiamen Water Group Co., Ltd. are guided by scientific, rigorous, efficient and economic principles. While taking various measures to intercept and control pollution sources, through many on-the-spot investigations and a large number of technical comparisons, they finally choose the self-circulating high-density suspended sludge sedimentation technology independently developed by Greenhouse Technology and the GreenEver high-efficiency sewage produced on this basis with high performance-price ratio. Water purification station treatment technology and equipment, as a means of emergency treatment of black and odorous water.

Project overview

In November 2017, Xiamen Water Group Co., Ltd. signed a contract with our company for the supply of complete sets of equipment. Greenhouse Technology provided two sets of 20,000 m_/d high-efficiency sewage treatment systems for efficient emergency treatment of Wulianxi and Nishanxi rivers in Tong'an District. A single set of equipment includes three water intake pumps, five high-efficiency non-power sewage purifiers, auxiliary dosing equipment, electrical instrument control equipment, pipe valves and cables, equipment accessories, spare parts and so on.

After signing the project contract, in order to achieve the goal of eliminating black odor by the end of 2017, our company leaders attached great importance to and cooperated with the work and requirements of Xiamen Water Group, dispatched a large number of engineers and technicians to be stationed on site for 24 hours for construction and construction. It took only four days to complete the installation of all the equipment of Nishanxi Project and ensure the smooth commissioning of water supply. Two days later, the Wushuxi Project was completed and adjusted on schedule. Try to succeed. In the process of project construction, the spirit of "dedication, professionalism and efficiency" of Lvheng Science and Technology has been fully developed, which has left a good impression on the owners.

Effect after completion

News Report and Leadership Care

At the end of December 2017, Xiamen Daily comprehensively reported on the treatment of Daitouxi River under the title of "Xiamen Eliminates Urban Black and Odorous Water Bodies in an All-round Way", and fully affirmed the technology of Lvheng Science and Technology. Through the measures of intercepting pollution sources, improving water quality, ecological water replenishment and efficient emergency treatment, the phenomenon of river black and odor has been eliminated and its appearance has changed fundamentally.

On July 26, 2018, Pei Jinjia, the Standing Committee of the Provincial Party Committee and Secretary of the Municipal Party Committee, investigated the treatment of urban sewage and black and odorous water in Xiamen. The city leaders Chen Qiuxiong, Huang Wenhui and Zhang Yigong also participated in the investigation. & nbsp; the leadership inspected the sewage treatment effect of the high-efficiency emergency treatment station in the middle of the stream.On the spot, the effects of retreat, sewage interception, silt removal and ecological restoration are gradually emerging. After emergency treatment and purification of sewage, the pollution of rivers has been greatly reduced. Some of the black and stinky waters in the past have reappeared with clean water and green banks.