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A sewage treatment method and technology of sewage treatment device, which are applied in the fields of dewatering/drying/concentrating sludge treatment, aerobic and anaerobic process treatment, etc.
Inactive Publication Date: 2009-03-04
NINESTAR IMAGE CO LTD
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[0005] The invention provides a sewage treatment method to solve the technical problem that the existing sewage
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Embodiment 1
[0026] A kind of sewage treatment method, it comprises the following steps:
[0027] 1. Collect sewage with different pollution levels;
[0028] 2. The collected sewage is reconciled to reach a preset pollution degree standard, and the preset pollution degree standard is a preset COD range.
[0029] 3. Add a PH value regulator such as lime to adjust the PH value to the set range, add a primary coagulant such as ferrous sulfate solution and a coagulant aid such as polyacrylamide and stir to precipitate pollutants in the sewage; processing, and precipitation;
[0030] 4. Add a secondary coagulant such as polyaluminum chloride and a coagulant aid such as polyacrylamide and stir, and perform secondary physical and chemical treatment on the sewage after physical and chemical treatment to further precipitate pollutants in the sewage
[0031] 5. Carry out anaerobic treatment;
[0032] 6. Carry out aerobic treatment;
[0033] 7. Add a decolorizing agent such as bleaching powder an...
Embodiment 2
[0037] Such as figure 1 , 2 , shown in 3, a kind of sewage treatment device that realizes above-mentioned sewage treatment method, comprises collection unit, adjustment unit, physical and chemical treatment unit, secondary physical and chemical treatment unit, anaerobic treatment unit, aerobic treatment unit,, tertiary physical and chemical treatment unit , sand filter unit and pressure filter treatment unit. After the sewage is collected in the collection unit, it passes through the physical and chemical treatment unit, secondary physical and chemical treatment unit, anaerobic treatment unit, aerobic treatment unit, tertiary physical and chemical treatment unit and sand filter unit. Level treatment, the sludge deposited in each unit is filtered through the filter unit, and the adjustment unit is placed between the collection unit and the physical and chemical treatment unit, which is used to reconcile the sewage with different pollution degrees to the preset pollution degree ...
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Abstract
The invention relates to the technical field of sewage treatment, particularly method and device for combined utilization and advanced purification of waste water at different pollution levels. The method comprises the conventional sewage treatment steps of sewage collection, physicochemical treatment, anaerobic treatment, aerobic treatment and sand filtration, in addition of a sewage control step. In the sewage control step, the chemical oxygen demand (COD) of sewage is controlled by using waste water at different pollution levels. In the physicochemical treatment step, the multi-stage physicochemical treatment method is adopted, and the physicochemical pond device structures and the physicochemical agents in the individual stages are different from each other, thereby reducing the COD value and the colority of the sewage and achieving the pretreatment effect before biochemical treatment. The sewage treatment method and the sewage treatment device can reduce the COD value of sewage from ten thousand to one hundred and ensure that the sewage meets the sewage drainage standard. The sewage treatment method and the sewage treatment device have the advantages of stable quality of the treated sewage, high treatment capacity and low treatment cost.
Description
technical field [0001] The invention relates to a sewage treatment method and a device thereof. Background technique [0002] There are many kinds of pollutants in wastewater, and it is often impossible to remove all pollutants with one treatment unit, especially some highly polluted wastewater. Generally, a kind of wastewater often needs to be treated by a treatment system composed of several methods and several treatment units before it can be discharged up to standard. [0003] According to the principle of action, it can be roughly divided into four categories: physical treatment, chemical treatment, physical chemical treatment and biological treatment. 1. Physical method: It is a wastewater treatment method that separates and recovers insoluble suspended pollutants in wastewater through physical action. Physical methods are further divided into: gravity separation method (mud-water separation), centrifugal separation method and sieve interception method, etc. 2. Chem...
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