Application Research of Combined Water Treatment Process in Black Odorous Water Body Treatment
Type:
Presented during:
WODCON XXII - Enhance the Harmony between Dredging and Ecology
Authors:
Wang Hang, Shu Zhiming
Abstract
"(Article in Chinese only) - The increasingly poor water conditions in urban rivers have caused widespread concern in society, and research on the causes and treatment techniques of black odorous water body has become increasingly mature. This article introduced the factors that lead to black odorous water in detail, also including the classification of black odorous water. What's more, the process of water becoming black and odorous was explained through chemical theory based on chemical mechanism of water environment. Considering the quality conditions of river and following the principles of 'water purification' and 'pollution abatement', we take bypass purification technology measures in this project via comparing combinations of various water treatment processes. In order to purify and reduce excessive ammonia nitrogen, total phosphorus, COD and other pollutants in water, we combined microfiltration membrane process with biological aerated filter process in this paper. Microfiltration equipment coupled with appropriate amount of CaO, the main process of the combination processes, was emplyed to remove part of ammonia nitrogen, total phosphorus and COD, and the biological aerated filter was used for further removing the pollution load including the dramatically increase of sensory indicators such as transparent and turbidity index and the decrease of pollution concentration. The effluent discharged into river channel is further treated by ecological restoration, and the effective transfer of pollutants is realized by means of plant absorption function. The combing processes of bypass treatment with ecological restoration can effectively purify water quality, reduce pollutants, and achieve the goal of comprehensive improvement of river water quality and ecological environment."
Keywords: Black odorous water body, Water chemical mechanism, Bypass purification, Pollution reduction, Water quality improvement