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Method for adding polyferric sulfate to phosphorus-containing wastewater

A technique for polymerizing ferric sulfate and waste water, which is applied in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc., and can solve problems affecting the uniform distribution of polymerized ferric sulfate, unfavorable removal of phosphorus, and crystallization of the outlet at the end of the pipeline Problems such as blockage

Inactive Publication Date: 2014-10-22
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The crystallization of the water outlet at the end of the pipeline is seriously blocked, which affects the uniform distribution of polyferric sulfate on the entire water flow end surface, which is unfavorable for the removal of phosphorus

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The sewage treatment pond of a certain sewage treatment plant in Southwest China is studied, the sewage treatment pond is 30 cubic meters, and the sewage flow rate is determined by the size of the incoming flow; the phosphorus content X of the sewage inlet is detected every 2 hours, and the record is 50 The measured X values ​​are respectively (ie: X p1 、X p2 ...X pn ): 3.95, 4.45, 4.33, 3.98, 4.09, 4.79, 3.71, 4.84, 4.39, 4.58, 3.29, 3.21, 3.59, 4.1, 3.66, 3.55, 3.65, 4.44, 4.68, 4.01, 2.96, 4.31, 4.58, 4.18, 3.4,3.09,2.74,3.42,3.4,3.64,3.57,3.16,3.19,3.57,3.42,3.41,3.5,4.21,4.73,3.86,3.7,3.92,5.28,5.49,5.46,5.39,5.12,4.73,4.21, 3.93, the unit is mg / L.

[0020] Every time when the phosphorus content of the sewage inlet is detected, the polymerized ferric sulfate solution with a concentration of 42.9% is added to the sewage treatment tank (randomly added, but the maximum and minimum values ​​need to be controlled), and each time the polymerized ferric sulfate solutio...

Embodiment 2

[0031] Steps 1 to 4 of this embodiment are the same as those in Embodiment 1, and the same functional relationship of Y=A+BX as in Embodiment 1 is obtained.

[0032] In step 4 of the present embodiment, according to Y=A+BX, i.e. y=15.97x-19.164, after adding polyferric sulfate solution in the sewage treatment tank for the first time, the sewage output was measured every 2h. Phosphorus content of the nozzle c. If X=4.24ml is recorded for the first time, Y=48.5kg is calculated. After adding 48.5kg of polyferric sulfate solution in the sewage treatment tank, at an interval of 2h, the phosphorus content c=0.77ml of the sewage outlet is recorded.

[0033] Record X=4.79ml for the second time, calculate Y=57.3kg, after adding polyferric sulfate solution 57.3kg in the sewage treatment pond, interval 2h, record the content c=0.96ml of the phosphorus of sewage outlet,

[0034] ...

[0035] When c is greater than 1mg / L, it means that the phosphorus content in the sewage is high at this...

Embodiment 3

[0049] This embodiment is carried out following Embodiment 1, that is, steps 1 to 4 of this embodiment are the same as in Embodiment 1, and the same functional relationship of Y=A+BX as in Embodiment 1 is obtained.

[0050] In step 4 of this embodiment, according to the relationship of y=15.97x-19.164, after the polyferric sulfate solution is added to the sewage treatment tank for the first time, the phosphorus content c of the sewage outlet is measured every 2 hours. If X=4.24ml is measured for the first time, Y=48.5kg is calculated, after 48.5kg of polyferric sulfate solution is added to the sewage treatment tank, at an interval of 2 hours, the phosphorus content c=0.77ml at the sewage outlet is measured.

[0051] Record X=4.79ml for the second time, calculate Y=57.3kg, after adding polyferric sulfate solution 46.2kg in the sewage treatment tank, interval 2h, record the content c=0.96ml of the phosphorus of sewage outlet,

[0052] ...

[0053]When c is less than 0.5mg / L, it...

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PUM

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Abstract

The invention discloses a method for feeding polymeric ferric sulfate into phosphorous wastewater. The method aims to overcome shortcomings of existing equipment and feeding modes and modify existing feeding devices, existing feeding methods and the like by means of performing experimental research and theoretical analysis on existing feeding procedures and researching and analyzing various factors which can affect crystallization of polymeric ferric sulfate, and a feeding procedure implemented by the novel method is continuous, stable and accurate. The method for feeding the polymeric ferric sulfate into the phosphorous wastewater includes steps of 1) sampling, 2) screening, 3) fitting and 4) measuring phosphorus content X of a sewage inlet at intervals of T seconds after the step 3) is completed. The method has the advantages that the feeding quantity of the polymeric ferric sulfate is determined, so that growth of crystal can be controlled and reduced; the optimal feeding quantity can still be selected under the influence of mutual effects of relevant factors such as the concentration, the flow velocity, the viscosity and the temperature, and the accuracy of the method has an important significance.

Description

technical field [0001] The present invention relates to the technical field of the addition process of polyferric sulfate, and specifically relates to the optimized design of the method for adding polyferric sulfate to make it reasonable and effective to add polyferric sulfate, to ensure sufficient mixing and efficient utilization, and to meet the requirements of reducing the cost of feeding method. Background technique [0002] At present, in the process of urban water and industrial wastewater treatment, the economical and simple flocculation sedimentation method is widely used at home and abroad to purify water quality. In the treatment of industrial wastewater and domestic sewage, as well as deep water purification, recycling, and sludge treatment, it is used are often critical. The quality of the flocculation effect will affect the treatment cost of the subsequent process of the water treatment process, and even affect the quality of the final effluent. Compared with ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F1/58
Inventor 刘清才纪振鹏吴国防杨剑李琳孔明刘浪兰苑培周强
Owner CHONGQING UNIV
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