The 16th Annual Conference of China Association for Science and Technology was held in Kunming, Yunnan Province, China from May 24 to 26, 2014. More than 2,000 representatives from universities, research institutes and government organizations attended the conference, including 4 famous scientists of world science and technology award winners, 108 Academicians, and 40 overseas experts from 14 international organizations.
During the session, Prof. Shaohua Yan from Jiangsu Academy of Agricultural Sciences presented an academic report on the Practices and Thoughts on Water Pollution Treatment Using Water hyacinth. He detailed the large-scale phytoremediation project on the Dianchi Lake using water hyacinth since 2011 and the integrated ecological engineering system of the “confined cultivation — mechanical harvest — post-harvest utilization” of water hyacinth.
According to the water quality monitoring data, the total nitrogen concentration decreases by 76.9%, from 13mg/L at the estuaries to 3mg/L at outlets; the total phosphorus concentration decreases by 70.2%, from 0.84mg/L to 0.25mg/L. Kun Ming Times made its comments on Prof. Yan’s report as follows: “We have never seen such an efficient and large-scale water quality restoration project which fights with lake eutrophication so successfully for 100 million cubic meter of water per year.”
In Kunming cited Prof. Yan’s viewpoints on public concern on the flooding of water hyacinth: The practices in Taihu Lake and Dianchu Lake showed that confined growth was safe and under control. The escaping or flooding of water hyacinth, as many people concerned, never happened. The paper also traced the recent research progress of the integrated engineering system of “confined cultivation — mechanical harvest — post-harvest utilization” of water hyacinth. After 3 years since 2011, over 1 million tons of water hyacinth had been cultivated and harvested. A specialized processing line has been established with the treating capacity of 3,000 tons of water hyacinth per day. The project has certainly achieved the goals for efficient control and utilization of water hyacinth.
Prof. Yan’s report also won recognition of Academician Jindong Zhao of Chinese Academy of Sciences, who believes that the gradual transformation of eutrophic lake into a clear and clean lake with water hyacinth is highly effective and meaningful.
Xi Zhu, senior engineer of Wuxi Bureau of Water Resources, spoke highly of JAAS’s combat to the algae in Dianchi Lake. He believes that water hyacinth is the only effective water plant that can suppress the growth of blue-gree algae. It is also reported that the large area confined growth of water hyacinth guarantees good water quality for at least 2 years.