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Composite phosphorus-removing turbidity-removing coagulant and phosphorus and turbidity removal method thereof

A coagulant, polymerization technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sewage treatment, etc. Improved turbidity removal rate, shortened time for phosphorus removal and turbidity removal, and low overall cost

Active Publication Date: 2015-01-21
上海丰远环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the phosphorus removal technology of sewage treatment plants is divided into biological phosphorus removal and chemical phosphorus removal. However, the stability of biological phosphorus removal is poor, and it is difficult to achieve the effect.

Method used

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  • Composite phosphorus-removing turbidity-removing coagulant and phosphorus and turbidity removal method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A kind of composite dephosphorization and turbidity removal coagulant, is made of ferrous sulfate, oxalic acid, NaClO 3 、H 2 o 2 、Al 2 (SO 4 ) 3 , sodium formate and purified water are produced by polymerization according to the mass ratio, and the mass ratio is 1:0.1~0.75:0.01~0.25:0.001~0.15:0.01~0.2:0.001~0.25:0.001~0.15:0.01~25.50. The phosphorus and turbidity removal method using the above-mentioned composite phosphorus removal and turbidity removal coagulant is to proportionally mix high phosphorus-containing wastewater with the composite phosphorus removal and turbidity removal coagulant (high phosphorus-containing wastewater / phosphorus and turbidity removal coagulant) The ratio is: 1:0.015. Stir evenly at room temperature and let it stand for 120 minutes. The phosphorus removal rate of high phosphorus-containing wastewater can reach 95.58%.

[0015] Table 1: The wastewater sampled from the test is Shuyi Photoelectric High Phosphorus Wastewater

[0016] ...

Embodiment 2

[0018] The components and operating conditions are the same as those in Example 1, except that the component distribution ratio of the composite phosphorus removal and decolorizing agent is 1:0.1~0.55:0.01~0.15:0.001~0.1:0.01~0.15:0.001~0.10:0.01 ~20.50. Use high-phosphorus wastewater and the composite phosphorus-removing turbidity-removing coagulant according to the mass ratio (high-phosphorus wastewater / phosphorus-removing and decolorizing agent): 1:0.005, stir evenly at room temperature, and let stand for 120 minutes to make The phosphorus removal rate of high phosphorus-containing wastewater reaches 98.44%.

[0019] Table 2: The test wastewater was sampled as the influent of Liantang Wastewater Treatment Plant

[0020] Total Phosphorus Content in Wastewater name Phosphorus and turbidity removal coagulant dosage 120 minute test Removal rate 18.64mg / L Phosphorus and turbidity removal coagulant 500mg / L 0.29mg / L 98.44%

Embodiment 3

[0022] Identical to the components and operating conditions of Example 1, the difference is that the sewage is the influent of Fengxian sewage plant, phosphorus-containing wastewater (total P content 10.91 mg / L, COD content 42.90 mg / L, turbidity (NTU) 35.40 mg / L, high phosphorus, high turbidity, high COD) and the composite dephosphorization and decolorizing agent according to the mass ratio (wastewater / phosphorus and turbidity removal coagulant) are: 1:0.0001~1:0.0005, stirring at room temperature Evenly, let it stand for 120 minutes. Under the same total phosphorus, according to the different dosage concentrations of chemicals, the data obtained are shown in the table below. The total phosphorus removal rate of phosphorus-containing wastewater can reach 52.34% to 98.72%. The removal rate of COD reaches 50.85%~61.02%, and the removal rate of COD reaches 15.85%~30.77%.

[0023] Table 3: Test wastewater sampling is the influent of Fengxian West Wastewater Treatment Plant

[002...

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Abstract

The invention belongs to the chemical field, provides composite phosphorus-removing turbidity-removing coagulant and a phosphorus and turbidity removal method thereof, and solves the technical problem that biological phosphorus removal in the prior art is poor in stability and effect. The composite phosphorus-removing turbidity-removing coagulant is made from ferrous sulfate, oxalic acid, NaClO3, H2O2, Al2(SO4)3, sodium formate and purified water by proportional polymerization reaction according to the mass ratio of 1:0.1-0.75:0.01-0.25:0.001-0.15:0.01-0.2:0.001-0.25:0.001-0.15:0.01-25.50. The phosphorus and turbidity removal method includes well mixing at normal temperature, and allowing for standing for 10-120 minutes so that for different samples, phosphorus removal rate can reach 52.34%-98.72% and turbidity removal rate can reach 50.85%-61.02%. Wastewater treatment by the phosphorus and turbidity removal method using the composite phosphorus-removing turbidity-removing coagulant is simple. The composite phosphorus-removing turbidity-removing coagulant is convenient to use, causes no secondary environmental pollution and is effective in phosphorus and turbidity removal. The time of phosphorus and turbidity removal is shortened, and using cost is low.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a coagulant, in particular to a composite coagulant for removing phosphorus and turbidity and a method for removing phosphorus and turbidity thereof. Background technique [0002] Water is the most important resource on the earth, and it is also the most abundant and widely distributed compound in nature, with a total amount of about 1.4*10 19 m 3 However, most of them are brackish seawater, and the fresh water available for development and utilization only accounts for 0.3% of the total water volume. Therefore, fresh water is an extremely limited precious resource. With the continuous acceleration of the pace of human industrialization and the gradual improvement of people's living standards, the consumption of fresh water is increasing day by day. my country's water resources account for about 1 / 4 of the world's average per capita level. In addition to my country'...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F1/58
Inventor 刘崇荣刘辉刘晔
Owner 上海丰远环保科技有限公司