Acidic mine waste water treatment system and use method thereof
A mine wastewater and treatment system technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve problems such as poor removal effect, single treatment, failure to meet treatment requirements, etc. , to improve the treatment efficiency, the system has good anti-blocking performance, and the effect of improving the acidic environment of the water body
Active Publication Date: 2015-03-04
ANHUI POLYTECHNIC UNIV
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Chinese Patent No. CN201020202516.1 discloses a new type of high-efficiency mine water sludge treatment system, which uses inclined plate sedimentation tanks for sludge settlement, and belt filter press for sludge dehydration. Pipelines and sludge discharge tanks are equipped with agitating devices to prevent sludge deposition, and PLC centralized control is adopted, which has a high degree of automation and obvious treatment effects. It can be widely used in sludge treatment in mine wastewater treatment, but this single factor may The treatment effect of permeable reactive wall (PRB) on sulfate ions is not high, generally only 40% to 60%, and most PRBs are too simple to treat metal ions. Some metal ions have good removal effects, and some have poor removal effects. After the reaction, the effluent still cannot meet the treatment requirements
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[0019] figure 1 The specific implementation of an acid mine wastewater treatment system of the present invention is shown: It includes a treatment tank 1 with water inlets 3 and water outlets 4 at both ends, and the water inlet 3 of the treatment tank 1 is connected to the wastewater tank 2 to be treated The treatment tank 1 is provided with a permeable reaction wall 8 connected to the inner wall of the treatment tank 1 between the water inlet and the water outlet 4. The treatment tank 1 is divided into two independent tank bodies, and the tank body near the water inlet 3 is set There is a physical and chemical reaction zone 5, and the pool body near the water outlet 4 is equipped with a biological reaction zone 6. In the physical and chemical reaction zone, fine iron filings, fly ash and apatite are added in a ratio of 2:2:1, and fine iron Chips, fly ash and apatite are 0.1~1.0mm, the biological reaction zone is added with broken corn cobs and ceramsites, inoculated with sulfa...
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The invention discloses an acidic mine waste water treatment system and a use method thereof, and relates to the field of acidic mine waste water treatment. The acidic mine waste water treatment system is provided with a permeable reaction wall and is divided into a physicochemical reaction zone and a biological reaction zone. In the physicochemical reaction zone, fine iron scales, fly ash and apatite adjust a pH value of AMD and pre-treat sulfate radicals and a part of heavy metal ions. In the biological reaction zone, harmful components of AMD are further treated by sulfate reducting bacteria which are attached to ceramsites and cobs and utilize excess sludge as a carbon source. A pH value of the treated AMD is improved obviously and acidity, sulfate radical ions and heavy metal ions satisfy the normal sewage discharge standards.
Description
Technical field [0001] The invention relates to the field of acid mine wastewater treatment, in particular to an acid mine wastewater treatment system. Background technique [0002] The pH of acid mine water is usually very low, rich in SO42- ions and Fe3+ ions, it is easy to leach toxic elements in associated minerals, such as lead, arsenic, cadmium, copper, etc., which has serious harm to mining production, groundwater resources and the ecological environment of mining areas . [0003] At present, the main methods for the treatment of acid mine wastewater at home and abroad are constructed wetland method, continuous alkali production system (SAPS), permeable reactive wall method (PRB), etc., and most known PRB uses physical and chemical methods such as filling reaction medium materials, such as Fill with limestone, zero-valent iron, zeolite, etc. Chinese Patent No. CN201020202516.1 discloses a new type of high-efficiency mine water sludge treatment system, which uses inclined p...
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IPC IPC(8): C02F9/14
Inventor 蔡昌凤卜文辰徐建平
Owner ANHUI POLYTECHNIC UNIV