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Composite coagulant for treating domestic sewage, processing method and device

A technology for domestic sewage and treatment methods, applied in energy wastewater treatment, adsorbed water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve the problems of high cost, unsatisfactory pollutant treatment effect, long process, etc. Good effect, enhanced charge neutralization, large surface area effect

Inactive Publication Date: 2009-01-21
谢永才 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a compound coagulant and a treatment method for treating domestic sewage, so as to solve the problems of long process flow, high cost and unsatisfactory treatment effect of main pollutants in the current domestic sewage treatment method

Method used

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  • Composite coagulant for treating domestic sewage, processing method and device
  • Composite coagulant for treating domestic sewage, processing method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: The raw sewage is taken from the domestic sewage outlet of the residential area of ​​Xinghua Village, Ethylene, Daqing City. The amount of composite coagulant actually dropped into in the sewage treatment test is 100mg / L, the CODmg / L=437mg / L of the sewage, and the ammonia nitrogen is 28.5mg / L.

[0014] The composite coagulant is a mixture of polysulfide aluminum chloride and polyacrylamide, and its weight ratio is 100:5.

[0015] Preparation of composite coagulant: add 4kg polyaluminum chloride [Al 2 (OH) n Cl 6-n 〕 m (m≤10, n≤3-5) and 3kg 95% sulfuric acid (H 2 SO 4 ), the weight ratio of polyaluminum chloride and sulfuric acid is 4: 3, and sulfuric acid is used as accelerator to re-aggregate with polyaluminum chloride to generate polysulfide aluminum chloride [Al 2 (OH) 2n Cl 10-2N SO 4 〕 m (m≤5, n=2-6). Add 5kg of polyacrylamide to 100kg of polysulfide-aluminum chloride mixture, stir and mix for 2 hours, and heat for 4 hours while rotating at...

Embodiment 2

[0025] Example 2: Sewage is taken from the domestic sewage discharge outlet of the residential area of ​​Ethylene Xinghua Village, Daqing City. The actual amount of composite coagulant used in the sewage treatment test is 50mg / L, the sewage COD is 354mg / L, and ammonia nitrogen is 25.9mg / L.

[0026] The composite coagulant is a mixture of polysulfide aluminum chloride and polyacrylamide, and its weight ratio is 100:1.

[0027] Preparation method of composite coagulant: add 4kg polyaluminum chloride [Al 2 (OH) n Cl 6-n 〕 m (m≤10, n≤3-5) and 1kg 95% sulfuric acid (H 2 SO 4 ), the weight ratio of polyaluminum chloride and sulfuric acid is 4: 1, and sulfuric acid is used as accelerator to re-aggregate with polyaluminum chloride to generate polysulfide aluminum chloride [Al 2 (OH) 2n Cl 10-2N SO 4 〕 m (m≤5, n=2-6). In the mixed solution of 100kg polysulfide aluminum chloride, add the polyacrylamide of 1kg and make composite coagulant, other is the same as embodiment 1.

...

Embodiment 3

[0032] Example 3: Sewage is taken from the domestic sewage outlet of the residential area of ​​Ethylene Xinghua Village, Daqing City. The actual amount of composite coagulant used in the sewage treatment test is 80 mg / L, the COD of sewage is 412 mg / L, and the ammonia nitrogen is 29.0 mg / L.

[0033] The composite coagulant is a mixture of polysulfide aluminum chloride and polyacrylamide, and its weight ratio is 100:8.

[0034] Preparation method of composite coagulant: add 4kg polyaluminum chloride [Al 2 (OH) n Cl 6-n 〕 m (m≤10, n≤3-5) and 2kg 95% sulfuric acid (H 2 SO 4 ), the weight ratio of polyaluminum chloride and sulfuric acid is 4: 2, and sulfuric acid is used as accelerator to re-aggregate with polyaluminum chloride to generate polysulfide aluminum chloride [Al 2 (OH) 2n Cl 10-2N SO 4 〕 m (m≤5, n=2-6). In the mixed liquor of 100kg polysulfide aluminum chloride, add the polyacrylamide of 8kg and make composite coagulant, other is the same as embodiment 1.

[0...

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Abstract

The invention discloses a composite coagulant, disposing method and device of living effluent, which is characterized by the following: the composite coagulant is composite liquid of polysulfide aluminium chloride and polyacrylamide; the device contains composite reacting pond, sediment pond and five sucking ponds with different filtering materials; the supernatant in the sediment pond is adsorbed and filtered continuously by five sucking ponds through flocculating, sedimenting and adsorbing; the method makes phenolic hydroxyl group and some metal ion in the effluent to complex better, which shortens technical flow path and saves constructing cost with COD removing rate over 85% and ammonia nitrogen removing rate over 94%.

Description

1. Technical field: [0001] The invention relates to sewage treatment, in particular to a compound coagulant and a treatment method for treating domestic sewage. 2. Background technology: [0002] At present, my country's water resources are seriously polluted. According to statistics, in 2005, among the 741 monitoring sections of the seven major river systems in the country, the water quality of 41% of the monitoring sections was inferior to the fifth-class standard, resulting in widespread pollution of rivers and lakes. The main reason for the eutrophication is that the discharge of pollutants exceeds the environmental capacity, and the indicators such as COD and ammonia nitrogen in the discharged water exceed the standard. At present, most of the urban domestic sewage treatment in our country is concentrated in a certain place to build a sewage plant, which requires the interception of sewage in various regions and multi-stage delivery to the sewage treatment plant, which c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F1/28
CPCY02W10/37
Inventor 谢永才
Owner 谢永才