Synergistic treatment method of cold and drought area mine wastewater and domestic sewage

Abstract

The invention discloses a synergistic treatment method of cold and drought area mine wastewater and domestic sewage. The method includes the steps: pretreating mine wastewater, and removing solid objects in the mine wastewater in a precipitation manner; performing biochemical treatment, leading pretreated mine wastewater into distributing wells below frozen soil layers, leading pretreated mine domestic sewage into the distributing wells, performing biochemical treatment, filling the bottom of the distributing wells with activated sludge with halophilic microorganisms; blowing hot air into thedistributing wells by an aerating device when the temperature in the distributing wells is lower than survival temperature of the halophilic microorganisms, and maintaining the temperature in the distributing wells to be lower than 12 DEG C. According to the method, mining wastewater can be treated in successive years in cold and drought areas in a lower cost manner, external temperature effect isavoided, nutrient elements cannot be additionally added in the biochemical treatment process, and ground plants can be nursed by microorganism metabolites.

Description

technical field [0001] The invention belongs to environmental engineering water treatment technology, in particular to a method for synergistic treatment of mine waste water and domestic sewage in cold and dry areas. Background technique [0002] Most of my country's mineral resources are distributed in the cold and arid areas of the west. These areas are mostly located in mountainous areas, where water resources are scarce. Most of the surface water is intermittent rivers. The evaporation is much greater than the precipitation, and the perennial flow dilution ability is poor. However, the development of mineral resources will inevitably cause damage to the stratum, groundwater flow field and surface, resulting in serious damage to the ecological environment of the mining area, and the problem of water resource shortage has become increasingly prominent. At present, 40% of mining areas in my country are seriously short of water. [0003] One of the main characteristics of mi...

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Problems solved by technology

[0004] The microbial method is a method with low cost, strong adaptability, and no secondary pollution. However, the use of the microbial method in the cold and arid regions of the west also has the problem of being affected by the external temperature. When the external temperature is lower than 10 o C, microorganisms will die in large numbers, and the operation of water treatment cannot be guaranteed

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