Pollutant control device and control method for recycling of metal mine water resources

A technology for controlling devices and pollutants, applied in water pollutants, biological treatment devices, water treatment parameter control, etc., can solve problems such as odor, farmland hardening, and affecting crop growth, so as to improve purification efficiency and reduce nitrogen and phosphorus content Effect

Active Publication Date: 2018-04-10
INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At the same time, when the river basin water carries heavy metal pollutants to the farmland, the discharge of domestic sewage also causes the increase of nitrogen, phosphorus content and suspended solids in the basin water, and the industrial discharge causes the increase of heavy metal content and refractory organic pollutants. Directly discharge polluted water to the farmland after treatment, which can cause farmland compaction, stench and affect the growth of crops
[0004] Based on the above situation, it is urgent to develop a pollutant control method and device in the process of water resource recycling in metal mines, so as to effectively solve the pollutants such as nitrogen and phosphorus content, suspended solids, organic matter, etc. It is the problem of excessive heavy metals, avoiding the serious enrichment of heavy metals in plants and endangering human health, maintaining the sustainable and healthy development of agriculture, and ensuring agricultural safety and human safety

Method used

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  • Pollutant control device and control method for recycling of metal mine water resources
  • Pollutant control device and control method for recycling of metal mine water resources
  • Pollutant control device and control method for recycling of metal mine water resources

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0138] set as figure 1The pollutant control device in metal mine water resources recycling shown in the figure is used to control pollutants in watershed water, and the A / O pool, nano aeration pool and multi-stage water inflow artificial wetland are set up sequentially connected to A / O The water and algae to be treated are passed into the O pool, so that the water and algae enter the anoxic pool (dissolved oxygen 0.2-0.5 mg / L) and aerobic pool (dissolved oxygen 2-4 mg / L) in sequence, Denitrifying bacteria, nitrifying bacteria and phosphorus accumulating bacteria are added to the A / O tank, and after treatment, the supernatant of the aerobic tank (COD higher than 200mg / L) is transferred to the nano-aeration tank, and dissolved oxygen is passed through the nano-aeration tank 10-25mg / L nano-bubble water, the dissolved oxygen in the nano-aeration tank is maintained at 4-6mg / L, and further organic matter degradation treatment is carried out in the aerobic environment of the nano-aer...

Embodiment 2～18

[0141] Similar to Example 1, the differences are shown in Table 1 below.

[0142] Table 1

[0143]

[0144]

experiment example

[0146] By measuring heavy metals and COD in water before and after treatment Cr , total phosphorus, total nitrogen content, and pH value, the effects of the pollutant control methods in Examples 1 to 18 were evaluated, and the results are shown in Table 2.

[0147] The evaluation water was collected from Qingshui River (Baoding City), and Pb(NO 3 ) 2 , Zn(NO 3 ) 2 、Na 3 PO 4 、NaNO 3 , so that the concentration of Pb in water is 1.31mg / L, the concentration of Zn is 4.77mg / L, the total P content is 11.25mg / L, the total N content is 28.18mg / L, COD Cr The pH is 203mg / L, and the pH is 7.39; the water is passed into the water treatment device for a series of treatments, the water inflow rate is 2.5L / min, the water outflow rate is 2.5L / min, and the treatment time is 24h (A / O pool is about 10h, The nano-aeration tank is about 2 hours, and the multi-stage water intake artificial wetland is about 12 hours), and the water quality of the effluent is measured after 24 hours.

[014...

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Abstract

The invention discloses a pollutant control device and control method for the recycling of metal mine water resources. The device comprises a multi-stage water inlet constructed wetland (3), and one or more layers of fillers are spread in the multi-stage water inlet constructed wetland (3), water distribution pipes (4) are buried in the filler layers at different height levels for performing multi-stage water inflow, and pollutants are degraded or removed by making received basin water flow through each layer of the filler. In the multi-stage water inlet constructed wetland, the filler varieties, use amount ratio, particle sizes and filling heights in each layer of the filler are specially selected, so that the adsorption of heavy metals, the filtration of suspended matter, the degradationof organic matter, dephosphorization and denitrification in the multi-stage water inlet constructed wetland can be effectively realized, the accumulation of the heavy metals is effectively preventedfrom harming human health, the good conditions of farmland is maintained, and the sustainable and healthy development of agriculture is promoted.

Description

technical field [0001] The invention relates to the field of water resource recycling, in particular to a pollutant control device and control method in metal mine water resource recycling. Background technique [0002] Mining and industrial discharge have become the main pollution sources of heavy metals in farmland soil. Heavy metal pollution in metal mining areas and surrounding soil has become one of the serious environmental problems. Throughout the development history of modern industry and urban construction at home and abroad, pollution is always an accompaniment to industrial production, mine development, and urban construction. Especially in the period of rapid economic development, scientific planning, environmental protection policies, ecological awareness, prevention and control measures, and technological applications have not yet been fully in place, and there are even serious disconnections in some areas, resulting in the expansion of heavy metals in farmlan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/30C02F101/20C02F101/16
CPCC02F9/00C02F1/001C02F1/281C02F1/283C02F2101/30C02F2101/16C02F2101/20C02F2101/105C02F2203/006C02F2209/10C02F3/301C02F3/32C02F3/308C02F3/34C02F2303/02C02F2301/08C02F2305/023Y02W10/10C02F2103/10C02F3/327C02F3/348C02F3/046C02F1/006C02F1/288C02F3/2806C02F3/341
Inventor 王雷张亚丽吴锋
Owner INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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