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Compound sludge reduction agent, preparation method and application of compound sludge reduction agent

A sludge reduction and composite technology, applied in the direction of dewatering/drying/concentrating sludge treatment, can solve the problems of unsatisfactory effect and high treatment cost, and achieve good sludge dewatering effect, environmental protection and low cost, environmental protection and high efficiency. good economic effect

Inactive Publication Date: 2017-05-31
周毅
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing dehydrating agents are mainly polyacrylamide series flocculants, which have high processing costs and unsatisfactory effects

Method used

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preparation example Construction

[0061] The preparation method of the composite sludge weight reducer is simple and easy, and the obtained composite sludge weight reducer has the advantages of good sludge dehydration effect, obvious weight reduction effect, environmental protection and low cost.

[0062] In a preferred embodiment, it also includes the step of preparing a flocculant: mixing polyacrylamide, optionally calcium oxide and optionally magnesium oxide, and drying to obtain the flocculant;

[0063] Preferably, the drying temperature is 80-100° C., and the drying time is 20-40 minutes.

[0064] In a third aspect, the present invention provides an application of a composite sludge weight reducer in sludge dewatering treatment, comprising the following processing steps:

[0065] The sludge is fully reacted with the conditioner, the activator and optionally the flocculant in sequence, and then the sludge and water are separated.

[0066] The composite sludge weight reducer of the present invention is app...

Embodiment 1

[0074] A compound sludge weight reducer, including conditioner and activator;

[0075] Wherein, the conditioner includes 10 kg of concentrated sulfuric acid (98% in mass concentration) and 60 kg of ferrous sulfate; the activator is hydrogen peroxide with a concentration of 27.5%.

Embodiment 2

[0077] A sludge weight reducing agent, the conditioner includes 10 kg of concentrated sulfuric acid (98% in mass concentration) and 1 kg of ferrous sulfate; the activator is hydrogen peroxide with a concentration of 15%.

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PUM

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Abstract

The invention relates to the field of sludge processing, and particularly provides a compound sludge reduction agent, a preparation method and application of the compound sludge reduction agent. The compound sludge reduction agent comprises a conditioning agent and an exciting agent, wherein the conditioning agent comprises at least one acid, Fe<2+> ions and optional metal ions, and the acid is organic acid or inorganic acid; the exciting agent comprises hydrogen peroxide. The reduction agent adopts the Fe<2+> ions to catalyze and decompose H2O2, so as to generate hydroxyl radical (OH) with strong oxidizing property, the hydroxyl radical can act with most of organic matters to degrade same to release bound water in activated sludge, the sludge dewatering effect is good, the reduction effect is good, and environmental protection and economic benefits are good.

Description

technical field [0001] The invention relates to the field of sludge treatment, in particular to a composite sludge weight reducer, a preparation method and an application thereof. Background technique [0002] With the development of cities and the continuous expansion of urban population, the discharge of industrial wastewater and domestic sewage is increasing. The remaining sludge produced by sewage treatment plants generally contains a large amount of organic matter, rich in nitrogen, phosphorus, potassium and trace elements, and can be effectively used; however, due to the presence of certain harmful chemicals, bacteria, microorganisms, and parasites And heavy metals, etc., if not handled properly, will cause serious harm to the environment after discharge. Therefore, the proper and scientific treatment of sludge has attracted more and more attention, and has also become the focus of attention of the water treatment industry. [0003] Sludge treatment includes concentr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/14C02F11/12
Inventor 张志峰王进王阳
Owner 周毅
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