A method for treating wastewater containing calcium and magnesium ions by ferrite co-precipitation
A technology of calcium magnesium ions and ferrite, applied in the field of water treatment, can solve the problems of unfavorable popularization and high treatment cost, and achieve the effects of low treatment cost, stable water quality and high cost performance
Active Publication Date: 2021-02-19
嘉兴合益环境工程有限公司
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Problems solved by technology
The traditional electrolysis method uses low voltage and high current, which makes the processing cost higher, which is not conducive to its large-scale promotion and use.
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[0024] A method for treating wastewater containing calcium and magnesium ions by ferrite co-precipitation, the method is mainly to add the wastewater to be treated into an electroflocculation reactor, and then add ferrous sulfate to the wastewater containing calcium and magnesium ions as a flocculation A coagulant that captures calcium and magnesium ions for electrocoagulation reaction; at the same time, iron ions are also precipitated on the plate, and the ferrous hydroxide produced becomes ferric after oxidation, which also increases the capture of calcium and magnesium ions; the electrocoagulation process Part of ferrite can be produced, and heavy metal ions can be removed with ferrite to form a stable ferrite coprecipitate, making the precipitation and separation of metal ions more complete.
[0025] The specific reaction is as follows:
[0026] 3Fe 2+ +6OH - →3Fe(OH) 2
[0027] 3Fe(OH) 2 +1 / 2O 2 →Fe.Fe 2 o 4 +3H 2 o
[0028] (3-x)Fe 2+ +xM 2+ +6OH - → Fe (3-...
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The invention discloses a method for treating calcium and magnesium ion-containing wastewater by ferrite co-precipitation. The coagulant that captures calcium and magnesium ions is used for electro-flocculation reaction; at the same time, iron ions are also precipitated on the pole plate, and ferrous hydroxide is formed into ferric iron after oxidation, which also increases the capture of calcium and magnesium ions; the process of electro-flocculation Part of ferrite can be produced, and heavy metal ions can form stable ferrite co-precipitation with ferrite and be removed, so that the precipitation and separation of metal ions are more complete. The present invention does not need diversion, one-time treatment meets the standard, and the water quality after treatment is stable; a large amount of COD can also be removed, the biodegradability of wastewater is improved, the decolorization effect is remarkable, and the matching with subsequent biochemical treatment units is good; the treatment cost is low, and the cost performance is high.
Description
technical field [0001] The invention belongs to the field of water treatment, and more specifically relates to a method for treating wastewater containing calcium and magnesium ions through ferrite co-precipitation. Background technique [0002] The theoretical basis of electrocoagulation-electric floatation (referred to as electrocoagulation flotation or electroflocculation) is a new combined functional water treatment technology combined with the application of electronics, fluid mechanics, electrochemistry, physics, chemistry and other related technologies. The key technology is the electrochemical reactor or electrolytic reactor, also referred to as electrocoagulation machine. [0003] The high-voltage pulse electrocoagulator is a highly efficient electrochemical reactor. Because the traditional electrolysis method uses low voltage and high current, the processing cost is relatively high, which is not conducive to its large-scale promotion and use. The high-voltage pul...
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IPC IPC(8): C02F1/463
CPCC02F1/4602C02F1/46109C02F1/463C02F2001/46133C02F2201/4614C02F2201/4615C02F2209/08
Inventor 黄永根姚春秀
Owner 嘉兴合益环境工程有限公司