CN103387321A - Processing method capable of recycling iron-containing sludge generated in advanced oxidation techniques - Google Patents
Processing method capable of recycling iron-containing sludge generated in advanced oxidation techniques Download PDFInfo
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- CN103387321A CN103387321A CN201310295306XA CN201310295306A CN103387321A CN 103387321 A CN103387321 A CN 103387321A CN 201310295306X A CN201310295306X A CN 201310295306XA CN 201310295306 A CN201310295306 A CN 201310295306A CN 103387321 A CN103387321 A CN 103387321A
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Abstract
A processing method capable of recycling iron-containing sludge generated in advanced oxidation techniques comprises the following steps: a. putting iron-containing sludge, which is in a sedimentation tank, into a sludge concentrating tank for gravity concentration, so that the volume and water content of the sludge are largely reduced; b. moving the concentrated sludge into a sludge dissolving tank, adding acid into the sludge dissolving tank, adjusting the pH to not greater than 1.5, and stirring at the same time to fully dissolve the sludge; c. moving the sludge-dissolved solution, the main component of which is ferric iron, into a storage tank for storage, leaving a portion of the solution as a flocculant which can substitute aluminum salts, and moving the rest of the solution into a reduction reaction tank; and d. adding single substance of Fe into the reduction reaction tank, so that the ferric iron undergoes reduction reactions to generate ferrous iron and the ferrous iron is moved into a buffer pool to decrease ferrous iron usage. The method has the following advantages: the method reduces the cost of sludge disposal; the flocculant can substitute PAC, so that medicament cost is lowered; and the recovered ferrous ion catalyst reenter reaction processes, so that catalyst usage can be reduced.
Description
Technical field
The present invention relates to the method for the circular treatment utilization of a kind of sewage, mud, belong to field of environment protection, relate in particular to a kind for the treatment of process that advanced oxidation processes is produced the iron containing sludge recycle.
Background technology
Sewage is carried out producing a certain amount of unmanageable iron containing sludge in advanced oxidation (class Fenton technology) treating processes, and traditional treatment process is the rear landfill disposal of dehydration, and this will take a large amount of land resources, be also simultaneously the waste to iron resources., along with being widely used of current advanced oxidation processes, this type of a large amount of mud will be produced.How properly this class mud of processing of science is the common problem of paying close attention in the whole world, how iron mud could be realized recycle.
Summary of the invention
The purpose of this invention is to provide a kind for the treatment of process that advanced oxidation processes is produced the iron containing sludge recycle that produces the iron containing sludge recycle in order to solve advanced oxidation processes, in view of the main component of this mud is ironic hydroxide,, by chemical reaction, make the iron ion recycle in mud.
For achieving the above object, the technical solution adopted in the present invention is:
A kind for the treatment of process that advanced oxidation processes is produced the iron containing sludge recycle comprises following steps:
A, with iron containing sludge in settling tank, be driven into sludge thickener and carry out gravity concentration, make it volume and water ratio reduces greatly;
B, the mud after concentrating are got to the mud dissolving tank, add acid, regulate pH to≤1.5, stir simultaneously, and mud is fully dissolved;
Solution after c, dissolving, its main component is ferric iron (being a kind of good flocculation agent), enters storage pool and stores, a part of solution gives over to flocculation agent, can replace aluminium salt to use; Another part enters the reduction reaction pond;
D, in the reduction reaction pond, add fe, ferric iron generates ferrous iron through reduction reaction, enters the buffering pond, can reduce the ferrous iron usage quantity.
According to above-mentioned a kind for the treatment of process that advanced oxidation processes is produced the iron containing sludge recycle, its characteristics are: iron containing sludge is added the 900ppm-1300ppm ferrous sulfate, after the lifting water pump impeller mixes, enter catalyst oxidation reactor, add simultaneously the 90ppm-200ppm hydrogen peroxide, reaction 5-9min, gravity flow enters oxidizing, flocculating pond reaction 25-45min, add alkali and adjust pH value to 7.0, add flocculation agent precipitation 5h, water outlet COD is 60-100mg/L, and the COD clearance is 66-74%.
Advantage of the present invention is: the present invention can reach recycling of advanced oxidation iron containing sludge in the recycle of reclaiming iron ion, reduced the expense of sludge disposal.Because the flocculation agent that produces can substitute PAC, can save a large number of medicament expense use, simultaneously, the catalyzer ferrous ion of recovery enters into reaction process again, can reduce the usage quantity of catalyzer, has reduced the running cost of catalyzer.
Description of drawings
Fig. 1 is a kind of process flow sheet that advanced oxidation processes is produced the facture of iron containing sludge recycle of the present invention.
Embodiment
The invention will be further described below in conjunction with accompanying drawing and embodiment, but the protection domain that the present invention requires is not limited to the scope of embodiment statement;
Embodiment 1: take timber as the raw pulp papermaking enterprise, middle section water is through biochemical system (various forms anaerobism, aerobic process) water outlet COD≤250mg/L.
(1) the waste water gravity flow enters the buffering pond, add the 1000ppm ferrous sulfate, after the lifting water pump impeller mixes, enter catalyst oxidation reactor, add simultaneously the 100ppm hydrogen peroxide, reaction 6min, gravity flow enters oxidizing, flocculating pond reaction 30min, adds alkali and adjusts pH value to 7.0, adds flocculation agent precipitation 5h, water outlet COD is 70mg/L, and the COD clearance is 72%.
(2) with the iron containing sludge in sludge thickener, get to the mud dissolving tank, add a certain amount of waste hydrochloric acid, open stirrer, mud is fully dissolved, form ferric iron solution, this moment, the pH value was 1.3;
(3) throw ferric iron solution into storage pool and store, as flocculation agent, can substitute PAC, as coagulating use, mud is turned waste into wealth before preliminary sedimentation tank, save a large number of medicament expense and use; Also can sell the have more than is needed flocculation agent of part, to enterprise, bring certain profit;
(4) have more than is needed ferric ion solution enters the reduction reaction pond, adds fe (iron powder), and ferric iron is reduced into ferrous iron, can regard catalyzer, joins in Buffer Pool,, to reduce the usage quantity of catalyzer, reduces running cost.
Embodiment 2: with the alpha-cellulose that extracts from the cellulosic materials such as timber and plant straw, or take linters as raw material, through being processed into spinning solution, through the regenerated fiber enterprise that wet-spinning is made, waste water is through biochemical system (various forms anaerobism, aerobic process) water outlet COD≤400mg/L again.
(1) the waste water gravity flow enters the buffering pond, add the 1500ppm ferrous sulfate, after the lifting water pump impeller mixes, enter catalyst oxidation reactor, add simultaneously the 180ppm hydrogen peroxide, reaction 8min, gravity flow enters oxidizing, flocculating pond reaction 40min, adds alkali and adjusts pH value to 7.0, adds flocculation agent precipitation 5h, water outlet COD is 100mg/L, and the COD clearance is 75%.
(2) with the iron containing sludge in sludge thickener, get to the mud dissolving tank, add a certain amount of waste hydrochloric acid, open stirrer, mud is fully dissolved, form ferric iron solution, this moment, the pH value was 1.3;
(3) throw ferric iron solution into storage pool and store, as flocculation agent, can substitute PAC, as coagulating use, mud is turned waste into wealth before preliminary sedimentation tank, save a large number of medicament expense and use; Also can sell the have more than is needed flocculation agent of part, to enterprise, bring certain profit;
(4) have more than is needed ferric ion solution enters the reduction reaction pond, adds fe (iron powder), and ferric iron is reduced into ferrous iron, can regard catalyzer, joins in Buffer Pool,, to reduce the usage quantity of catalyzer, reduces running cost.
Embodiment 3: to process cotton, fiber crops, man-made fiber and blending product thereof as main printing and dyeing mill, waste water is through biochemical system (various forms anaerobism, aerobic process) water outlet COD≤180mg/L.
(1) the waste water gravity flow enters the buffering pond, add the 1200ppm ferrous sulfate, after the lifting water pump impeller mixes, enter catalyst oxidation reactor, add simultaneously the 130ppm hydrogen peroxide, reaction 7min, gravity flow enters oxidizing, flocculating pond reaction 42min, adds alkali and adjusts pH value to 7.0, adds flocculation agent precipitation 5h, water outlet COD is 60mg/L, and the COD clearance is 67%.
(2) with the iron containing sludge in sludge thickener, get to the mud dissolving tank, add a certain amount of waste hydrochloric acid, open stirrer, mud is fully dissolved, form ferric iron solution, this moment, the pH value was 1.3;
(3) throw ferric iron solution into storage pool and store, as flocculation agent, can substitute PAC, as coagulating use, mud is turned waste into wealth before preliminary sedimentation tank, save a large number of medicament expense and use; Also can sell the have more than is needed flocculation agent of part, to enterprise, bring certain profit;
(4) have more than is needed ferric ion solution enters the reduction reaction pond, adds fe (iron powder), and ferric iron is reduced into ferrous iron, can regard catalyzer, joins in Buffer Pool,, to reduce the usage quantity of catalyzer, reduces running cost.
This shows, reclaim the recycle of iron ion, can reach recycling of advanced oxidation iron containing sludge, reduced the expense of sludge disposal.Because the flocculation agent that produces can substitute PAC, can save a large number of medicament expense use, simultaneously, the catalyzer ferrous ion of recovery enters into reaction process again, can reduce the usage quantity of catalyzer, has reduced the running cost of catalyzer.
The invention has the beneficial effects as follows: the treatment process that the objective of the invention is to produce in order to solve advanced oxidation processes the iron containing sludge recycle, not only solved the iron containing sludge dehydration difficulty that advanced oxidation produces, the problems such as dewatered sludge landfill occupation of land, saved simultaneously the expense of sludge treatment, also mud is turned waste into wealth,, by chemical reaction, made it into a kind of good flocculation agent, with substitution of Al salt; Also the part iron ion can be reclaimed, continue to serve as catalyzer, to reduce the usage quantity of catalyzer.
Embodiment recited above is described the preferred embodiment of the present invention; not design of the present invention and protection domain are limited; under the prerequisite that does not break away from design concept of the present invention; various modification and improvement that in this area, common engineering technical personnel make technical scheme of the present invention, all should fall into protection scope of the present invention.
Claims (1)
1. treatment process that advanced oxidation processes is produced the iron containing sludge recycle comprises following steps:
A, with iron containing sludge in settling tank, be driven into sludge thickener and carry out gravity concentration, make it volume and water ratio reduces greatly;
B, the mud after concentrating are got to the mud dissolving tank, add acid, regulate pH to≤1.5, stir simultaneously, and mud is fully dissolved;
Solution after c, dissolving, its main component is ferric iron, enters storage pool and stores, a part of solution gives over to flocculation agent, can replace aluminium salt to use; Another part enters the reduction reaction pond;
D, in the reduction reaction pond, add fe, ferric iron generates ferrous iron through reduction reaction, enters the buffering pond, can reduce the ferrous iron usage quantity.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105016451A (en) * | 2015-07-16 | 2015-11-04 | 中国轻工业长沙工程有限公司 | Recycling method for iron-enriched sludge of pulping and papermaking factory wastewater |
| CN105366899A (en) * | 2015-12-10 | 2016-03-02 | 东华大学 | Ozone-anaerobic iron reduction combined Fenton oxidation technology for sludge reduction |
| CN105417869A (en) * | 2015-12-10 | 2016-03-23 | 东华大学 | Fenton oxidation-biological combination treatment technology capable of achieving ozone-anaerobic iron reduction and sludge reduction |
| CN105858978A (en) * | 2016-06-17 | 2016-08-17 | 东莞道汇环保科技有限公司 | Method for treating wastewater with Fenton reagent and wastewater treatment system |
| CN106007080A (en) * | 2016-07-01 | 2016-10-12 | 南京大学 | Method for gradient oxidation deep purification of biochemical tail water |
| CN108059219A (en) * | 2016-11-07 | 2018-05-22 | 天津壹新环保工程有限公司 | A kind of molysite using in sludge prepares the method and device of flocculant |
| CN108911310A (en) * | 2018-08-09 | 2018-11-30 | 北京环球中科水务科技有限公司 | A kind of the continous way processing system and treatment process of industrial wastewater middle and high concentration COD |
| CN111099713A (en) * | 2020-03-12 | 2020-05-05 | 李靖 | Fenton reaction method for recycling iron-based catalyst |
| CN111392997A (en) * | 2020-05-19 | 2020-07-10 | 杭州秀澈环保科技有限公司 | Recycling process of organophosphorus sludge |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105016451A (en) * | 2015-07-16 | 2015-11-04 | 中国轻工业长沙工程有限公司 | Recycling method for iron-enriched sludge of pulping and papermaking factory wastewater |
| CN105417869B (en) * | 2015-12-10 | 2018-08-03 | 东华大学 | A kind of Fenton oxidation-life assemblage treatment process of ozone-anaerobism iron reduction combination mud decrement |
| CN105366899A (en) * | 2015-12-10 | 2016-03-02 | 东华大学 | Ozone-anaerobic iron reduction combined Fenton oxidation technology for sludge reduction |
| CN105417869A (en) * | 2015-12-10 | 2016-03-23 | 东华大学 | Fenton oxidation-biological combination treatment technology capable of achieving ozone-anaerobic iron reduction and sludge reduction |
| CN105858978A (en) * | 2016-06-17 | 2016-08-17 | 东莞道汇环保科技有限公司 | Method for treating wastewater with Fenton reagent and wastewater treatment system |
| CN106007080A (en) * | 2016-07-01 | 2016-10-12 | 南京大学 | Method for gradient oxidation deep purification of biochemical tail water |
| CN106007080B (en) * | 2016-07-01 | 2019-03-19 | 南京大学 | A kind of method of biochemical tail water step oxidation depth purification |
| CN108059219A (en) * | 2016-11-07 | 2018-05-22 | 天津壹新环保工程有限公司 | A kind of molysite using in sludge prepares the method and device of flocculant |
| CN108911310A (en) * | 2018-08-09 | 2018-11-30 | 北京环球中科水务科技有限公司 | A kind of the continous way processing system and treatment process of industrial wastewater middle and high concentration COD |
| CN108911310B (en) * | 2018-08-09 | 2024-02-02 | 北京环球中科水务科技股份有限公司 | Continuous treatment system and treatment process for high-concentration COD in industrial wastewater |
| CN111099713A (en) * | 2020-03-12 | 2020-05-05 | 李靖 | Fenton reaction method for recycling iron-based catalyst |
| CN111392997A (en) * | 2020-05-19 | 2020-07-10 | 杭州秀澈环保科技有限公司 | Recycling process of organophosphorus sludge |
| CN111392997B (en) * | 2020-05-19 | 2022-03-01 | 杭州秀澈环保科技有限公司 | Recycling process of organophosphorus sludge |
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Application publication date: 20131113 |