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Process for treating sludge in domestic sewage

A technology for domestic sewage and sludge, applied in the field of processing technology, can solve problems such as performance degradation, affecting sewage sludge treatment effect, etc., and achieve the effect of strengthening adsorption treatment performance, strengthening adsorption purification treatment effect, and strengthening contact bonding effect.

Pending Publication Date: 2022-03-29
上海电气电站环保工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The performance of the recycled products in the existing magnetic particle sewage sludge treatment will be severely degraded when reused, which will seriously affect the subsequent sewage sludge treatment effect

Method used

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  • Process for treating sludge in domestic sewage
  • Process for treating sludge in domestic sewage
  • Process for treating sludge in domestic sewage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The invention provides a process for the treatment of sludge in domestic sewage, and the specific treatment steps are as follows:

[0031] Step 1: Pass the sewage to be treated into the coagulation tank, add coagulant, stir for 10 minutes, and then pass the sewage into the magnetic mixing tank;

[0032] Step 2: Add the composite magnetic particles into the magnetic mixing tank, and after ultrasonic treatment for 20 minutes, pass the sewage into the flocculation tank;

[0033] Step 3: Add the flocculant into the flocculation tank, stir for 10 minutes, then pass the sewage into the sedimentation tank, let it stand until the flocculation is completely settled, obtain sludge and water, and discharge the water;

[0034]Step 4: After adding the sludge to the high-speed shearing machine for strong stirring and dispersion, the composite magnetic particles are recovered through the magnetic drum separator, and the composite magnetic particles are thrown back into the magnetic mi...

Embodiment 2

[0045] Different from Example 1, the composite magnetic particles include: 3.4% catechin, 10.2% chitosan, 3.2% branched polyethyleneimine, 3.2% nano zirconium dioxide by weight percentage , 5.3% of polyaluminum chloride, 74.7% of nano ferric oxide.

Embodiment 3

[0047] Different from Examples 1-2, the composite magnetic particles include: 3.1% catechin, 9.9% chitosan, 2.9% branched polyethyleneimine, 2.9% nano Zirconium dioxide, 4.9% polyaluminum chloride, 76.3% nano ferric oxide.

[0048] Get respectively the technology of the treatment of the sludge in the domestic sewage in the above-mentioned embodiment 1-3 and the process of the treatment of the sludge in the domestic sewage of the control group one, the process of the treatment of the sludge in the domestic sewage of the control group two, the control group The treatment process of sludge in domestic sewage of the third group, the treatment process of the sludge in the domestic sewage of the control group 4 and the treatment process of the sludge in the domestic sewage of the control group 5, the treatment process of the sludge in the domestic sewage of the control group 1 Compared with embodiment three, there is no catechin in the composite magnetic particles in the process of ...

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Abstract

The invention discloses a process for treating sludge in domestic sewage, and particularly relates to the technical field of sewage treatment. According to the invention, the magnetic particles still keep a high-cleanliness sewage treatment effect after multiple times of circular treatment of sewage sludge treatment, so that the magnetic particles used in the sewage treatment process can be effectively recycled for a long time, the sewage treatment stability is good, catechin performs functional treatment on nano ferroferric oxide, and the treatment effect is good. The chitosan and the nano ferroferric oxide form composite nano microspheres, the branched polyethyleneimine is used for modifying the nano ferroferric oxide, and the polyaluminum chloride, the nano zirconium dioxide and the nano ferroferric oxide are subjected to ball-milling coating treatment, so that the contact combination effect of the raw materials in the composite magnetic particles can be effectively enhanced, and the stability is good; catechin, branched polyethyleneimine, nano zirconium dioxide, polyaluminum chloride and a chitosan three-dimensional network are compounded, so that the stability of the composite magnetic particles is better, and the performance is more stable.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, more specifically, the invention relates to a process for treating sludge in domestic sewage. Background technique [0002] Domestic sewage is the wastewater discharged from residents' daily life. The pollutants contained in domestic sewage are mainly organic matter (such as protein, carbohydrates, fat, urea, ammonia nitrogen, etc.) and a large number of pathogenic microorganisms (such as parasite eggs and intestinal infectious viruses, etc.) ). The organic matter present in domestic sewage is extremely unstable and easily rots to produce stench. Bacteria and pathogens reproduce in large numbers using organic matter in domestic sewage as nutrients, which can lead to the spread of infectious diseases. Therefore, domestic sewage must be treated before discharge. Conventional coagulation technology adds coagulants, flocculants and other chemicals to sewage to coalesce colloids and suspen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/12C02F1/56C02F1/52C02F1/48C02F1/28B01J20/26B01J20/28B01J20/30
CPCC02F9/00C02F1/5236C02F1/56C02F1/488C02F1/288B01J20/22B01J20/24B01J20/265B01J20/06B01J20/0248B01J20/0288B01J20/28009B01J20/28016C02F1/36C02F2001/007
Inventor 周灵怡郭士义龚燕雯
Owner 上海电气电站环保工程有限公司
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