Red mud and coal gangue synergistic neutralization and integrated detoxification method based on bioleaching technology
Through bio-leaching technology, pyrite and elemental sulfur in coal gangue are biooxidized to generate active substances for neutralizing sodium alkali in red mud and removing toxic/valent metals, solving the problem of treating harmful substances in red mud and coal gangue solid waste, and achieving efficient coordinated treatment and resource utilization.
CN119634413APending Publication Date: 2025-03-18BEIJING INST OF TECH +1
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Patent Information
- Application Number
- CN202411876320.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-03-18
AI Technical Summary
Technical Problem
The existing technology is difficult to effectively treat harmful substances in two types of solid waste, red mud and coal gangue, resulting in low resource utilization and high environmental potential harm.
Method used
Using a method based on bio-leaching technology, pyrite and elemental sulfur in coal gangue are biooxidized to generate active substances for neutralizing sodium alkali in red mud, and simultaneously remove toxic/valent metals from two types of solid waste.
Benefits of technology
The coordinated neutralization of red mud and coal gangue, integrated detoxification and metal recycling have been achieved, the resource utilization rate of two types of solid waste has been improved, and environmental hazards have been reduced.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention provides a red mud and coal gangue synergistic neutralization and integrated detoxification method based on a bioleaching technology, which comprises the following steps: S1, adding an inorganic energy substrate into a membrane bioreactor, inoculating at least one of sulfur-oxidizing bacteria, iron-oxidizing bacteria or a compound flora of the sulfur-oxidizing bacteria and the iron-oxidizing bacteria, and culturing to obtain a bacterial solution; extracting bacterial liquid through a membrane to obtain active leachate; s2, coal gangue, red mud and organic solid waste are mixed, and a red mud-coal gangue pile is obtained; s3, performing bioleaching treatment on the red mud-coal gangue heap to obtain a leachate and treated composite solid waste; wherein the bioleaching treatment comprises active leachate indirect leaching treatment and / or bacterial liquid direct leaching treatment; according to the method, indirect leaching and direct leaching are conducted on the red mud and coal gangue composite solid waste heap, synergistic neutralization, integrated detoxification and metal recovery of the red mud and the coal gangue are achieved through multi-mechanism biological enhancement leaching, and conditions are created for safe-scale soil digestion of the composite solid waste.
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