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COD remover

A remover and curing technology, applied in water pollutants, water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve the problems of high operating cost, low removal rate, and COD reduction, and achieve easy follow-up treatment, The effect of high sewage efficiency and less impurity treatment

Inactive Publication Date: 2020-04-17
LIAONING XINLONG TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main disadvantages are: it is only used as pretreatment in the early stage to reduce COD, which is relatively easy to handle, and the removal rate is low, and it cannot meet the sewage discharge standard
The main disadvantages are: the chemical treatment objects are mainly organic and inorganic substances in sewage, and have little effect on microorganisms, N, and P; more sludge is produced, and the final sludge disposal process is more troublesome and the operating cost is high
Disadvantages are: complex process flow, large one-time investment for transformation, and difficult construction; high requirements for sewage pretreatment, if there are too many suspended solids in the influent, it is easy to cause the rise of reactor head loss and blockage; High consumption, high operating costs

Method used

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  • COD remover

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Embodiment Construction

[0016] Dissolve 20-25% polyaluminum chloride, 25-30% polyferric sulfate and 5-10% water glass in water at 40-50°C, add sodium chlorite several times to carry out polymerization reaction for 2-6 hours, Preferably, after 3-4 hours, the temperature is raised to 75-85° C. for 8-12 hours, filtered, and matured to obtain a COD remover.

[0017] The pore size of the filter is preferably 200-800 mesh; the aging temperature is 75-85°C, preferably 80°C.

[0018] Technical principle:

[0019] Polyaluminum chloride and polyferric sulfate are metal composite salts, which have the function of purifying water. Under the action of water glass solution, the COD and metal ion impurities in the sewage are mixed, purified and flocculated, so it can make the treatment of COD more efficient. can be improved to a greater extent.

[0020] COD remover performance index:

[0021] Appearance reddish brown liquid;

[0022] Effective content ≥ 60%;

[0023] Metal ion impurities ≤0.1%.

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Abstract

The invention provides a COD remover prepared by the steps: dissolving 20-25% of polyaluminum chloride, 25-30% of polyferric sulfate and 5-10% of water glass in water at the temperature of 40-50 DEG C, adding sodium chlorite for multiple times, performing polymerization reaction for 2-6 hours, preferably 3-4 hours, heating to 75-85 DEG C, curing for 8-12 hours, filtering, and curing to obtain theCOD remover. The passing-through pore diameter for filtering is preferably 200-800 mesh, and the curing temperature is 75-85 DEG C, preferably 80 DEG C. The COD remover is high in sewage treatment efficiency, the treatment rate reaches 90% or above, treated impurities are few, follow-up treatment is easy, and the COD remover is safe and non-toxic. The COD remover is suitable for being used as a sewage treatment COD treatment agent.

Description

technical field [0001] The invention proposes a water treatment agent in the field of environmental protection, specifically a COD removal agent. Background technique [0002] At present, the commonly used methods for treating sewage COD exceeding the standard include: adsorption method, flocculant method, oxidant method, microbial method, etc. [0003] 1. Adsorption method to remove COD: [0004] It uses activated carbon, macroporous resin, bentonite and other active adsorption materials to adsorb and treat particulate organic matter and chroma in sewage. The main disadvantages are: it is only used as pretreatment in the early stage to reduce COD which is relatively easy to handle, the removal rate is low, and it cannot meet the sewage discharge standard. [0005] 2. COD removal by flocculant method: [0006] The chemical coagulation method can effectively remove the organic matter in the wastewater and greatly reduce the COD of the wastewater. The so-called chemical co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56C02F1/52C02F101/30
CPCC02F1/56C02F1/5236C02F2101/30
Inventor 陈旭东杨畅杨红刘伏兰王凤艳李泽群
Owner LIAONING XINLONG TECH