Method and apparatus for advanced treatment and reclamation of industrial wastewater

A technology for advanced treatment and industrial wastewater, applied in the direction of aerobic process treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem of COD reduction, differences in technical methods, high cost of filtration or chemical treatment, etc. problems, to achieve the effect of reasonable technology and stable operation

Active Publication Date: 2008-09-17
江苏中宜金大环保产业技术研究院有限公司
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Problems solved by technology

The waste water after secondary biochemical treatment refers to the treatment of waste water with a COD of about 100 to 300 (including the so-called reclaimed water). Although this part of the water with a low COD value can meet the discharge standards, it is still difficult to meet the reuse of water at all levels. It is difficult to further reduce COD by ordinary aerobic or anaerobic biological treatment methods, and the cost of fine filtration or chemical treatment is high. So far, new methods and technologies must appear
Different types of industrial wastewater will have very different technical methods for treatment and reuse.

Method used

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  • Method and apparatus for advanced treatment and reclamation of industrial wastewater
  • Method and apparatus for advanced treatment and reclamation of industrial wastewater
  • Method and apparatus for advanced treatment and reclamation of industrial wastewater

Examples

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example 1

[0032] Example 1: The water quality components of oil refinery wastewater are very complex. In addition to oil, ammonia nitrogen, sulfur, phenol, and cyanide, it also contains benzene, ketones, ethers, organic phosphorus, metal salts, etc., and the concentration of organic matter is high, mostly toxic and harmful substances. Difficult to deal with. After the secondary treatment, the COD is still around 80~100mg / L, the suspended solids are around 20~30mg / L, the total hardness is around 200~300mg / L, and the turbidity is also high. It must go through a series of advanced treatments. Only then can it be reused. craft see figure 2 , See Table 1 for water quality indicators after treatment.

[0033] After the secondary biochemical discharge water is treated by the circulating biological expanded bed, pressure sand filter system and NF system, the indicators such as COD, ammonia nitrogen, SS, sulfide, phenol, turbidity, and total iron all reach the quality of circulating water rep...

example 2

[0034] Example 2: The secondary biochemical discharge water of oil refinery wastewater is reused as boiler feed water after being treated by circulating biological expanded bed, pressure sand filter system, UF and RO system, see process image 3 , See Table 2 for water quality indicators after treatment. After the secondary discharge water is treated by UF ultrafiltration and RO reverse osmosis system, various pollutant indicators and salt indicators are reduced to trace amounts, and the desalination effect is obvious. However, the conductivity index and silica index are sometimes too high, which is not suitable for desalination, and further desalination is required through anion and cation exchangers.

example 3

[0035] Example 3. The secondary biochemical effluent of printing and dyeing wastewater is treated by circulating biological expansion bed, pressure sand filter system and RO system and then reused for the production of make-up water. The process is shown in Figure 4 , See Table 3 for water quality indicators after treatment.

[0036] Table 3 Water quality indicators for the treatment process of printing and dyeing wastewater reused as make-up water

[0037]

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Abstract

The invention discloses a method to advanced treat and recover the industrial sewage, which comprises: taking high-efficiency aerobic circulation biological expansion bed water treatment to the two-stage biochemical treated outlet water with aerobic biological reaction tower as main; leading the sewage into reactor through distribution-water device arranged on tower bottom; taking biochemical treatment with the distribution-gas device and microbe on surface of light biological particle carrier on aerobic bed unit; controlling the rising speed of flow in tower to achieve need expansion state; entering filter pond or pressure filter pond to remove the suspension, and outputting water come up to the advanced treatment request. This invention can satisfy different request for recovery water quality by selecting variable device combination.

Description

technical field [0001] The invention relates to the field of industrial water saving and reuse, and more specifically relates to a method for advanced treatment of industrial wastewater and the same process and device. technical background [0002] With the development of urbanization and industrialization in our country, industrial water consumption and drainage are increasing year by year, and water resources are becoming increasingly scarce. In my country's urban water use, industrial water accounts for a considerable proportion, but the efficiency and reuse rate of industrial water use in my country are low, and water resources are seriously wasted. Water strategy has become an effective way to alleviate the contradiction between supply and demand of water resources in my country and to achieve sustainable economic and social development. [0003] The recycling of industrial wastewater opens up non-traditional water sources and realizes the recycling of sewage. It can n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F3/08C02F3/30C02F101/16C02F101/30
CPCY02W10/10
Inventor 任洪强严永红
Owner 江苏中宜金大环保产业技术研究院有限公司
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