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Method for producing polymeric ferric sulfate using iron-containing sludge of sewage treatment plant

A technology for polymerizing ferric sulfate and sewage treatment plant, which is applied in water/sludge/sewage treatment, ferric sulfate, sludge treatment, etc., and can solve problems such as affecting urban environmental sanitation, occupying large land, and environmental pollution.

Active Publication Date: 2016-07-06
GUANGZHOU GUXIANGYUAN WATER TREATMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, the Fenton oxidation process will produce a large amount of physicochemical sludge (the addition of ferrous sulfate will increase the sludge). At present, these sludges are generally treated as waste, which not only takes up a lot of land, but also contains harmful components such as heavy metals and organic pollution. pollutants and odor will become a major public hazard affecting urban environmental sanitation and pollute the environment

Method used

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  • Method for producing polymeric ferric sulfate using iron-containing sludge of sewage treatment plant

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Experimental program
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Effect test

Embodiment 1

[0025] In the sludge concentration tank, there are 5 tons of iron-containing sludge (water content 65%) from a sewage treatment plant. The treatment method includes the following steps:

[0026] 1) The sludge is press-filtered into a mud cake through a plate-and-frame filter press; the mud cake obtained by the press filtration is recycled;

[0027] 2) Put the mud cake into the reactor, and add 90% to 98% concentrated H 2 SO 4 、H 2 o 2 , NaClO, polymerization agent (NaCO 3 ) react at 50°C under normal pressure;

[0028] The dosage of each material in each ton of sludge (water content 65%) is as follows:

[0029] Concentrated H 2 SO 4 (98%): 110L

[0030] h 2 o 2 (30%): 15L

[0031] NaClO (16%): 20L

[0032] NaCO 3 (polymerization agent): 16kg

[0033] 3) Carry out solid-liquid separation to the product in the reactor by ceramic membrane separator, the liquid obtained is liquid polyferric sulfate;

[0034] 4) Concentrating the liquid obtained by the ceramic membra...

Embodiment 2-7

[0037] The temperature of step 2) in embodiment 1 is selected 15 ℃, 30 ℃, 70 ℃, 90 ℃ and 100 ℃ respectively, all the other conditions are the same, and the finished product of polyferric sulfate is obtained as table 1:

[0038] Table 1

[0039] Example

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Abstract

The invention belongs to the field of sewage treatment and particularly relates to a method for producing polymeric ferric sulfate using the iron-containing sludge of a sewage treatment plant. In the invention, through a series of processes such as filter pressing, pH regulation, polymerization reaction, concentration and drying of the iron-containing sludge of the sewage treatment plant, the iron-containing sludge of the sewage treatment plant is finally made into a finished product of polymeric ferric sulfate; the iron-containing sludge of the sewage treatment plant can be reduced by 90% or so, about 400-600kg of polymeric ferric sulfate can be produced from each ton of iron-containing sludge of the sewage treatment plant, and the product quality reaches the national quality standard for related products.

Description

technical field [0001] The invention belongs to the field of sludge treatment, in particular to a method for producing polyferric sulfate by utilizing iron-containing sludge of a sewage treatment plant. Background technique [0002] With the rapid development of industrial production, the discharge of industrial wastewater is increasing day by day. At the same time, the requirements of environmental protection standards are becoming more and more stringent. It is difficult for ordinary biochemical treatment processes to meet the discharge standards. Therefore, a large number of advanced treatment processes, such as Fenton's catalytic oxidation and electro-oxidation flocculation, have been widely used, resulting in a large amount of difficult-to-treat chemical sludge. The Fenton oxidation process has a high ability to remove refractory organic pollutants, and has been widely used in the treatment of printing and dyeing wastewater, oily wastewater, phenol-containing wastewater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F11/12C01G49/14C02F101/20
CPCC01G49/14C02F11/00C02F11/122C02F2101/203
Inventor 何汝靛许枫刘松李江蔡光禄王庆朱晓峰
Owner GUANGZHOU GUXIANGYUAN WATER TREATMENT CO LTD