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Ferrate pre-oxidation-bioactivity filter combined water treatment method

A bioactive, ferrate technology, applied in biological water/sewage treatment, oxidized water/sewage treatment, sustainable biological treatment, etc., can solve the problem of large investment in ozone oxidation process equipment, limited ozone process application, complex maintenance and management and other problems, to achieve the effect of short contact time of empty bed, ensuring the safety of water effluent and good effect.

Inactive Publication Date: 2010-04-14
HARBIN ENG UNIV
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Problems solved by technology

However, there are certain problems in the actual application of the ozone oxidation process: (1) the investment in the ozone oxidation process equipment is large, the operating cost is relatively high, and the maintenance and management are complicated; (2) the high concentration of ozone will cause harm to the human body, and the ozone Exhaust gas needs to be strictly treated; (3) When the raw water contains bromide, it will form bromate harmful to human body under the oxidation of ozone. Bromate is classified as 2B level by the International Agency for Research on Cancer (higher carcinogenic possibility ), these deficiencies limit the application of the ozone process

Method used

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  • Ferrate pre-oxidation-bioactivity filter combined water treatment method
  • Ferrate pre-oxidation-bioactivity filter combined water treatment method
  • Ferrate pre-oxidation-bioactivity filter combined water treatment method

Examples

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Embodiment

[0024] Example: Taking a certain surface water as the experimental source water, the water body is seriously polluted, and the typical pollutants are ammonia nitrogen 0.8mg / L, COD Mn 7.5mg / L, the smell is earthy (V).

[0025] The polluted water body was treated by the combination process of ferrate preoxidation and bioactive filter.

[0026] First, add ferrate for pre-oxidation before the coagulation process, the dosage is 1.0mg / L, dosing in dry method, pre-oxidation time is 30min, after pre-oxidation, add aluminum sulfate for coagulation, coagulant The dosage is 25~30mg / L. The specific coagulation conditions are as follows: fast stirring for 1 min, with a rotation speed of 200-300 rpm; slow stirring for 10 min, with a rotation speed of 60 rpm; and a precipitation time of 30-45 min.

[0027] The precipitated water treated by ferrate oxidation is used as the influent of the biologically active filter. The biologically active filter is transformed from an ordinary sand filter...

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Abstract

The invention provides a ferrate pre-oxidation-bioactivity filter combined water treatment method, which comprises the following steps: firstly, adding ferrate to pre-oxidize a micro-polluted water body, wherein the adding quantity of the ferrate is controlled between 0.3mg / L and 1.5mg / L, and the pre-oxidation time is 5-30min; and enabling pre-oxidized water to flow in from the top end of bioactivity filter and flows out from the bottom end, wherein the upper layer of the bioactivity of the bioactivity filter is an active carbon layer with height of 60-80cm, and the lower layer is a quartz sand layer, and the filtration speed is 6-9m / h. the invention includes various procedures of chemical oxidization, absorption, biological oxidization and the like, is applied to the feedwater treatment without changing the traditional process and increasing large equipment, presents better organic pollutants removal property, and is a conventional pollution-removal strengthening technology which is suitable to national conditions of China and can economically improve the water quality of drink water.

Description

(1) Technical field [0001] The invention relates to a treatment method, which is a water treatment method suitable for the transformation of old water plants. (2) Background technology [0002] Affected by the discharge of industrial wastewater and domestic sewage, the quality of drinking water sources in my country has gradually deteriorated. The pollution components in water are mainly organic matter containing natural organic and inorganic components. Among them, many trace organic pollutants are the most difficult to remove, which is very harmful to human health. In addition, the increase in the content of ammonia nitrogen and other pollutants in water also seriously affects Pollution removal efficiency of water treatment processes. [0003] Activated carbon has been widely used in the advanced treatment of drinking water due to its well-developed pore structure, which can effectively adsorb organic matter. However, activated carbon has limited adsorption capacity and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/72C02F1/52C02F3/34C02F3/10C02F3/12
CPCY02W10/10
Inventor 任芝军陈绍英邹广平马桂林刘桂芳孙勇米海蓉王春丽张军
Owner HARBIN ENG UNIV
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