Author(s): Chu Wang; Yuru Liu
Linked Author(s):
Keywords: Black-odorous water; County; Holistic governing; Restoration
Abstract: The governing of black-odorous water bodies in metropolitan cities has gotten significant achievements. However, due to the complexities of pollution, the lack of a sewage network, and insufficient funds, governing black-odorous water bodies in county-level cities is relatively difficult and the typical practices are scarce. The present work systematically reviewed the kinds of literature and project cases on governing the black-odorous water bodies and reported a case performance in a county-level city in Hubei province. A holistically technical scheme was established, including pollution source reduction, process control, and the water ecosystem strengthening, to advance the governing of the black-odorous water bodies in county-level cities. Then, the holistic technical scheme was practiced in a typical black-odorous river located in a county city in Hubei province. The 9.3 km of drainage network was renovated, the 36200 m3 of polluted sediments were dredged, the microbial agent and natural purification materials were applied, and 16343 m2 of aquatic plants were restored. After the case implementation, the transparency, dissolved oxygen, redox potential and NH3-N in the county river averagely reached 23 cm, 4.7 mg/L, 122 mV, and 3.38 mg/L, respectively, which were relatively far away from the judgment standard of the black-odorous water bodies in China, and the aquatic plants growth well in the river, indicating the successfully practice on governing the black-odorous water bodies in county-level cities. The present work could provide a reference for the sustainable governing of black-odorous water in county-level cities.
Year: 2024