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Hydrophilic/hydrophobic sewage dephosphorization coagulant and preparation method thereof

A coagulant, water and sewage technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of large sludge, difficult treatment, increased water treatment costs, etc., to achieve less residual pollutants, less environmental load, clear water effect

Active Publication Date: 2014-01-01
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the artificial addition of chemical agents, on the one hand, a large amount of sludge is produced, which is difficult to handle, and on the other hand, it causes an increase in water treatment costs.

Method used

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  • Hydrophilic/hydrophobic sewage dephosphorization coagulant and preparation method thereof
  • Hydrophilic/hydrophobic sewage dephosphorization coagulant and preparation method thereof
  • Hydrophilic/hydrophobic sewage dephosphorization coagulant and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0036] A kind of hydrophilic / hydrophobic sewage phosphorus removal coagulant, it is prepared according to the following steps:

[0037] (1) Pretreatment of raw materials: use industrial waste slag as raw material and grind it into a powder of less than 100 meshes. The industrial waste slag comes from an aluminum factory in Shandong. The main components are: Al2 o 3 The content is 23.82wt%, Fe 2 o 3 The content is 23.05wt%, SiO 2 The content is 21.65wt%, Na 2 The O content is 17.36wt%, the CaO content is 1.34wt%, the loss on ignition is 12.75wt%, and the balance is a very small amount of impurities;

[0038] (2) Preparation of active solution: make concentrated sulfuric acid into dilute sulfuric acid with a volume fraction of 10%, add surfactant sodium dodecylbenzene sulfonate and mix evenly to form an active solution, and the surfactant accounts for the volume fraction of the solution 0.30%;

[0039] (3) Activation of raw materials: Mix the pretreated raw material powder ...

Embodiment 2

[0044] A kind of hydrophilic / hydrophobic sewage phosphorus removal coagulant, it is prepared according to the following steps:

[0045] (1) Pretreatment of raw materials: industrial waste slag is used as raw material, and it is ground into a powder of less than 100 mesh; the waste slag comes from a smelter in Hubei, and its main component is: Al 2 o 3 The content is 19.45wt%, Fe 2 o 3 The content is 24.03wt%, SiO 2 The content is 29.51wt%, Na 2 The O content is 1.54wt%, the CaO content is 2.31wt%, the loss on ignition is 23.14wt%, and the balance is impurities;

[0046] (2) Preparation of active solution: make concentrated sulfuric acid into dilute sulfuric acid with a volume fraction of 15%, add surfactant sodium lauryl sulfate, and the volume fraction of surfactant in the solution is 0.23%;

[0047] (3) Activation of raw materials: Mix the pretreated raw materials and the active solution at a weight ratio of 1:2, then add them to the reaction kettle, stir and react at 1...

Embodiment 3

[0050] A kind of hydrophilic / hydrophobic sewage phosphorus removal coagulant, it is prepared according to the following steps:

[0051] (1) Pretreatment of raw materials: industrial waste slag is used as raw material and ground into a powder of less than 100 mesh; industrial waste slag is used as raw material and ground into a powder of less than 100 mesh; the waste slag comes from a smelter in Hubei, and its main component is: Al 2 o 3 The content is 19.45wt%, Fe 2 o 3 The content is 24.03wt%, SiO 2 The content is 29.51wt%, Na 2 The O content is 1.54wt%, the CaO content is 2.31wt%, the loss on ignition is 22.16wt%, and the balance is impurities;

[0052] (2) Preparation of active solution: make concentrated sulfuric acid into dilute sulfuric acid with a volume fraction of 15%, add surfactant sodium dodecylbenzenesulfonate, and the volume fraction of the surfactant in the solution is 0.12%;

[0053] (3) Activation of raw materials: Mix the pretreated raw materials and the...

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Abstract

The invention belongs to and relates to the field of waste water purification treatment, and particularly relates to a hydrophilic / hydrophobic sewage dephosphorization coagulant which is prepared through the following steps: (1) pretreatment of raw materials: grinding industrial residue used as a raw material into powder; (2) preparation of an active solution preparation: adding surfactant into 10-15% dilute sulfuric acid, wherein the surfactant accounts for 0-0.30% (volume percent) of the solution; and (3) activation of the raw material: mixing the pretreated raw material and the active solution according to a weight ratio of 1:2, stirring to react at 80-100 DEG C for 1.5-2 hours, performing vacuum drying on the material after reaction, grinding, and screening to obtain the hydrophilic / hydrophobic sewage dephosphorization coagulant. According to the invention, the obtained dephosphorization coagulant has favorable effect of removing phosphorus in sewage; the hydrophilicity / hydrophobicity of the coagulant can be regulated according to user demands; and the coagulant is simple in manufacturing method, low in synthesis cost and easy to realize industrial production. Thus, the recycling of solid waste is realized.

Description

technical field [0001] The invention relates to a hydrophilic / hydrophobic sewage dephosphorization coagulant and a preparation method thereof, belonging to the technical field of waste water purification treatment. Background technique [0002] Phosphorus contained in domestic sewage and industrial wastewater is the main cause of eutrophication in surface water, especially in lakes. Domestic sewage and industrial wastewater must be treated before being discharged into surface water bodies, but domestic sewage and industrial wastewater discharged into surface water after being treated by sewage treatment plants are subject to GB8978-1996 "Comprehensive Wastewater Discharge Standard", the first level of phosphate The discharge standard is 0.5mg / L, the secondary standard is 1mg / L, and the surface water is implemented according to GB3838-2002 "Environmental Quality Standards for Surface Water". The total phosphorus in the pool is ≤0.01mg / L. The difference in phosphorus concent...

Claims

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Application Information

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IPC IPC(8): C02F1/52
Inventor 李晔刘曦朱丽李柏林张猛马啸
Owner WUHAN UNIV OF TECH
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