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Domestic sewage treatment process

A technology for treatment process and domestic sewage, applied in water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. It can solve problems such as inability to treat domestic sewage, and achieve the effect of speeding up purification.

Inactive Publication Date: 2016-09-21
ANHUI GUONENG YISHENG ENVIRONMENTAL PROTECTION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These water bodies contain high concentrations of organic matter, and ordinary one-way processes cannot effectively treat domestic sewage

Method used

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  • Domestic sewage treatment process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A domestic sewage treatment process is characterized in that the steps include:

[0023] (1) Grille filter

[0024] The domestic sewage is first filtered through the grille, the gap of the grille used is 1.5cm, and the passing water speed is 1m / s;

[0025] (2) coagulation filtration

[0026] Add a coagulant to the filtered water, the coagulant is polyaluminum chloride, and the amount of the coagulant is 30g / m 3 ;

[0027] (3) Anaerobic treatment

[0028] Isolate the waste water from the air to achieve an anaerobic environment. Anaerobic treatment is carried out on the domestic waste water. The treatment time is 3 days. The process parameters of the treatment include: the temperature is set as a gradient temperature rise, the first half is 20°C, the second half is 8°C, pH7.0 , organic acid concentration 1000mg / L, alkalinity 2000mg / L;

[0029] (4) Good maintenance treatment

[0030] By aerating the water body, the water body is aerobically treated, the treatment tim...

Embodiment 2

[0034] A domestic sewage treatment process is characterized in that the steps include:

[0035] (1) Grille filter

[0036] The domestic sewage is first filtered through the grille, the gap of the grille used is 1.5cm, and the passing water speed is 1.2m / s;

[0037] (2) coagulation filtration

[0038] Add a coagulant to the filtered water, the coagulant is polyaluminum chloride, and the amount of the coagulant is 45g / m 3 ;

[0039] (3) Anaerobic treatment

[0040] Isolate the waste water from the air to achieve an anaerobic environment. The domestic waste water is treated anaerobically. The treatment time is 4 days. The process parameters of the treatment include: the temperature is set to gradient temperature rise, the first half is 20°C, the second half is 8°C, pH7.2 , organic acid concentration 1500mg / L, alkalinity 3000mg / L;

[0041] (4) Good maintenance treatment

[0042] By aerating the water body, the water body is aerobically treated, the treatment time is 5 days, ...

Embodiment 3

[0046] A domestic sewage treatment process is characterized in that the steps include:

[0047] (1) Grille filter

[0048] The domestic sewage is first filtered through the grille, the gap of the grille used is 1.5cm, and the passing water speed is 1.5m / s;

[0049] (2) coagulation filtration

[0050] Add a coagulant to the filtered water, the coagulant is polyaluminum chloride, and the amount of the coagulant is 50g / m 3 ;

[0051] (3) Anaerobic treatment

[0052] Isolate the waste water from the air to achieve an anaerobic environment. Anaerobic treatment is carried out on the domestic waste water. The treatment time is 3-5 days. The process parameters of the treatment include: the temperature is set to gradient heating, the first half is 20°C, the second half is 8°C, pH7 .5, organic acid concentration 1800mg / L, alkalinity 3000mg / L;

[0053] (4) Good maintenance treatment

[0054] By aerating the water body, the water body is aerobically treated, the treatment time is 6 ...

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Abstract

The invention discloses a domestic sewage treatment process. Each cell of a grille board used in the step (1) is 1.5 cm, and the grille board in the specification can isolate most of floating rubbish in water; a coagulant used in the step (2) is polymeric aluminum chloride, the efficient water purifier can have an effective coagulating sedimentation effect on insoluble particles in the water; the temperature during anaerobic treatment in the step (3) is set to rise in a gradient manner and is 20 DEG C in the first half period and 8 DEG C in the later half period, the first half period of anaerobic treatment is the microorganism growth period, the later half period is the treatment period, accordingly, the temperature in the first half period is high and facilitates growth of anaerobic bacteria, and the temperature in the later half period is low and facilitates treatment of waste water through the anaerobic bacteria; the aeration mode in the step (4) is intermittent aeration, aeration is suspended for 24 h after aeration is performed for 24 h and facilitates growth of aerobic bacteria, and accordingly, useless aeration can be reduced according to the growth cycle of the bacteria and the treatment cycle; filtration in the step (5) is ultrafiltration, pressure applied to the water is 0.5 Mpa, and the purification speed of the water can be increased through ultrafiltration.

Description

technical field [0001] The invention relates to the technical field of water pollution prevention and control, in particular to a domestic sewage treatment process. Background technique [0002] Urban sewage mainly includes domestic sewage and industrial sewage, collected by the urban drainage pipe network and transported to sewage treatment plants for treatment. These water bodies contain high concentrations of organic matter, and ordinary one-way processes cannot effectively treat domestic sewage. Modern sewage treatment technology can be divided into primary, secondary and tertiary treatment processes according to the degree of treatment. Primary sewage treatment applies physical methods, such as sieving, sedimentation, etc., to remove undissolved suspended solids and floating substances in sewage. The secondary treatment of sewage is mainly the application of biological treatment methods, that is, the process of material transformation through the metabolism of microor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCC02F9/00C02F1/001C02F1/444C02F1/5245C02F3/30C02F2301/08
Inventor 梁明钟华张兵张霞
Owner ANHUI GUONENG YISHENG ENVIRONMENTAL PROTECTION SCI & TECH
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