Novel high molecular composite phosphorus removal coagulant special for MBR (membrane bioreactor) process and application of novel high molecular composite phosphorus removal coagulant

A polymer and coagulant technology, applied in the chemical industry, can solve the problems of poor removal of total phosphorus and other problems, and achieve the effects of significant technological progress, mild operating conditions and improved phosphorus removal rate.

Inactive Publication Date: 2018-05-08
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

[0003] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a new polymer composite phosphorus removal coagulant specially used in the MBR process and its application. The described polymer new composite phosphorus removal coagulant specially used in the MBR process The coagulant and its application should solve the technical problem of poor total phosphorus removal effect when the MBR process treats sewage (waste) water in the prior art

Method used

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  • Novel high molecular composite phosphorus removal coagulant special for MBR (membrane bioreactor) process and application of novel high molecular composite phosphorus removal coagulant
  • Novel high molecular composite phosphorus removal coagulant special for MBR (membrane bioreactor) process and application of novel high molecular composite phosphorus removal coagulant
  • Novel high molecular composite phosphorus removal coagulant special for MBR (membrane bioreactor) process and application of novel high molecular composite phosphorus removal coagulant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A new type of polymer composite dephosphorization coagulant specially used in MBR process is composed of ferrous iron, citric acid, NaCl, H 2 o 2 、Al(HO) 3 , silicic acid, stabilizer and pure water are produced by polymerization in proportion, ferrous, citric acid, NaCl, H 2 o 2 、Al(HO) 3 The mass ratio of silicic acid, stabilizer and purified water is 0.45:0.15:0.05:0.1:0.1:0.05:0.05:0.05.

[0018] Described ferrous iron is ferrous chloride.

[0019] Mix the high-phosphorus-containing wastewater with the above-mentioned new polymer composite phosphorus-removing coagulant specially used in the MBR process according to the mass ratio (phosphorus-containing wastewater / phosphorus-removing coagulant): 1:0.015, and continuously aerate and pump water at room temperature The detection can make the phosphorus removal rate of high phosphorus-containing wastewater reach 99.57%.

[0020] Table 1: The test wastewater was sampled as phosphorus-containing wastewater from a phot...

Embodiment 2

[0023] Same as the components and operating conditions of Example 1, the difference is: the mass ratio of the components of the polymer novel composite phosphorus removal coagulant specially used in the MBR process is 0.40:0.15:0.05:0.10:0.15:0.05:0.05 :0.05. Mix phosphorus-containing sewage with the new polymer composite phosphorus removal coagulant specially used in the MBR process according to the mass ratio (phosphorus-containing sewage / phosphorus removal coagulant): 1:0.003, and add it to the MBR membrane process to remove For the phosphorus tank, after 10 minutes of aeration, the water pump is turned on to pump the water for detection, and the aeration is continued under normal temperature conditions without standing still, so that the phosphorus removal rate of high-phosphorus wastewater can reach 98.71%. Table 2: Test wastewater sampling is the influent of a sewage treatment plant

[0024]

Embodiment 3

[0026] Identical to the components and operating conditions of Example 1, the difference is that the sewage belongs to a sewage plant influent raw water (total phosphorus content 10.05mg / L, COD content 142.10mg / L, turbidity (NTU) 36.20mg / L ,) The proportion of waste water / polymer new compound phosphorus removal coagulant specially used in MBR process is shown in Table 3. Continuous aeration at room temperature, pumping water for 30 minutes of aeration detection, can make the total phosphorus removal rate of waste water reach 86.97~ 96.72%, COD removal rate reached 40.92-73.34%, turbidity removal rate reached 69.39-82.32%.

[0027] Table 3: Test wastewater sampling is the influent of a sewage treatment plant

[0028]

[0029] Note: The dosing amount is the dosage of the new polymer composite phosphorus removal coagulant specially used in the MBR process, and the data of the 30-minute pumping test under continuous aeration conditions.

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Abstract

The invention relates to a novel high molecular composite phosphorus removal coagulant special for an MBR (membrane bioreactor) process. The novel high molecular composite phosphorus removal coagulantis prepared from ferrous, citric acid, NaCL, H2O2, Al(HO)3, aluminum silicate, stabilizer and pure water in a given ratio by virtue of polymerization reaction, wherein a mass ratio of the ferrous tothe citric acid to the NaCl to the H2O2 to the Al(HO)3 to the aluminum silicate to the stabilizer to the pure water is 1 to (0.1 to 0.75) to (0.01 to 0.25) to (0.001 to 0.15) to (0.01 to 0.2) to (0.001 to 0.25) to (0.001 to 0.15) to (0.01 to 25.50). The invention also provides application of the novel high molecular composite phosphorus removal coagulant special for the MBR process in removing phosphorus in industrial waste water, domestic sewage or tap water. The novel high molecular composite phosphorus removal coagulant and the application thereof are simple in waste water treatment operation, convenient in use, free from secondary pollution to the environment, good in phosphorus removal effect, free from blocking an MBR membrane pipe, non-corrosive and low in application cost.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to a coagulant, in particular to a novel polymer composite phosphorus-removing coagulant specially used in the MBR process and its application. 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, the vast majority is 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's rapid development ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/58C02F3/12
CPCC02F1/58C02F3/1215C02F3/1268C02F2101/105Y02W10/10
Inventor 刘辉刘晔刘崇荣
Owner 上海丰远环保科技有限公司
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