Heavy-metal-containing sludge treatment method based on enrichment function of macro fungi

Abstract

The invention relates to the field of sludge heavy metal treatment, in particular to a lead-and-chromium containing sludge treatment method based on the enrichment function of macro fungi. The method includes the steps of 1, obtaining fungus liquid seeds, 2, preparing fungus cultivation materials, 3, preparing a fungal inoculant, 4, culturing fungi, 5, harvesting the fungi, conducting incineration treatment and detecting the content of heavy metals, 6, determining whether operation in the last step needs to be repeated or not. Through the enrichment function of the macro fungi and the dilution effect of the cultivation materials, the content of lead, chromium and other heavy metals in the sludge is effectively reduced, at the same time, the sludge is turned into an organic fertilizer, sludge recycling is achieved, and the method is expected to become a new treatment method of the sludge containing the heavy metals. The method does not cause secondary pollution, no complicated equipment is needed, operation is simple, and the cost is low.

Description

[0001] Technical field: [0002] The invention relates to the field of sludge heavy metal treatment, in particular to a method for treating sludge containing lead and chromium based on the enrichment function of macrofungi. [0003] Background technique: [0004] Sludge is the sediment produced in the process of sewage treatment. It often contains heavy metals such as lead and chromium. It has complex components and high toxicity. If it is not handled properly, it will easily lead to environmental risks. According to statistics, the output of wet sludge in my country reached 40 million tons in 2015, and how to dispose of these sludges has become an urgent problem to be solved. [0005] At present, the sludge treatment methods include solidification / stabilization method, incineration method, sea reclamation, landfill, burning of building materials and agricultural use. The solidification / stabilization method reduces the effectiveness of heavy metals by adding a solidification / s...

AI Technical Summary

Problems solved by technology

Its shortcoming is that the fungus is only an auxiliary means, and it cannot absorb heavy metals by itself.

[0013] Compared with soil, heavy metal polluted sludge has a greater water content, usually up to 85%, and is fluid, so it cannot be remediated by phytoremediation. At the same time, the composition of sludge is complex. In addition to heavy metal pollution, it may contain persistent organic pollutants , so heavy metal sludge is more difficult to treat than soil