In-situ ecological restoration method of lake and reservoir water polluted by acid mine wastewater

Abstract

The invention discloses an in-situ ecological restoration method of an acid mine drainage (AMD) pollution lake / reservoir water body. A surface layer plant floating bed is combined with bottom layer sludge microbe buffer treatment to perform ecological restoration treatment on the AMD pollution lake / reservoir water body; excess sludge generated by conventional secondary town sewage treatment is added into the pollution lake / reservoir to automatically select the optimal dominant microbe groups for purifying the AMD, thereby avoiding microbe preservation, activation, inoculation, culture and other special complex and difficult links for treating microbes; and the excess sludge is recycled to provide an early nutrient carrier and buffer the acidity of the AMD. The surface layer cattail plant floating bed continuously provide carbon nitrogen and other nutrients and energy sources for the growth of the bottom layer microbes by using the growth secretory products and litters so as to form a self-sustaining ecological purification system, thereby avoiding the continuous addition of exogenous carbon nitrogen and other nutrients and greatly saving the cost.

Description

technical field [0001] The invention relates to the field of ecological restoration of polluted water, in particular to an in-situ ecological restoration method for acid mine wastewater polluted lake and reservoir water. Background technique [0002] In Sichuan, Guizhou, Jiangxi and other provinces and regions, large coastal coal fields have been formed, and marine-terrestrial alternating coal measures of varying thickness (commonly known as Leping coal measures) have been deposited, with an average sulfur content of more than 4% in coal; The average sulfur content in coal is the highest (2.43%). Most of Guizhou Province is high-sulfur coal with sulfur content greater than 4%, while the sulfur content in coal gangue often contains a higher proportion, which can be greater than 7%. At the same time, this region belongs to the subtropical warm and humid climate characterized by high temperature and rain in summer and mild and humid winter. The mining of rich coal resources in...

AI Technical Summary

Problems solved by technology

At present, the external nutrients used in the existing process are usually chemicals, which are expensive and costly to consume; although some studies have shown that the use of exogenous organic components such as straw and sludge fermentation products can also effectively maintain the treatment effect and significantly reduce the The cost of adding nutrients, but it must be added periodically and cannot be maintained by itself, which is not conducive to the promotion and application under field conditions

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