Town domestic sewage treatment process

Abstract

The invention discloses a technology for processing market town living sewage, which comprises the steps of sewage collection, solid-liquid separation, anaerobic digestion, heavy metal removal, anaerobic active mud processing, stepped manual marsh establishment, fish pond and paddy field ecological system establishment and the like. The technology for processing market town living sewage can effectively remove organic substances and heavy metal, such as COD, BOD and the like in the sewage so that the sewage reaches the standard of sewage discharge. The invention has obvious dirt removal effect, energy consumption saving, low investment, low running expense, convenient and reliable running, wide using range and small occupied area and is widely used for the ecological processing and the integrated circulation use of market town living sewage.

Description

technical field

[0001] The invention relates to a sewage treatment process, in particular to an ecological cycle treatment process for domestic sewage in market towns. Background technique

[0002] With the continuous improvement of my country's urbanization level, there are nearly 50,000 small towns in the country. The domestic sewage in these small towns is directly discharged without treatment, causing serious pollution to the water environment. At present, the domestic treatment of this kind of wastewater adopts biological methods, that is, aerobic, anaerobic, and facultative oxygen treatment systems. Although this treatment system has the characteristics of high processing load and strong processing capacity, the disadvantage is that it is a one-time investment. The second is to adopt the artificial wetland system, that is, to use abandoned or idle farmland, depressions, ponds, etc. to transform them into aquatic plants, crushed stone coal beds, microorganisms, etc. Se...

Examples

Embodiment 1

[0030] see figure 1 , the process steps of the present invention are as follows:

[0031] ① Sewage collection

[0032] After the sewage is collected by the sewage collection pipe network, an artificial screen and a mechanical grille are installed at the end of the main sewage outlet to remove the coarse solid debris in the sewage. screen;

[0033] ② Solid-liquid separation

[0034] Flow the sewage into the advection primary sedimentation tank, stay for 4 hours, and settle the large suspended matter in the sewage to realize solid-liquid separation. The primary sedimentation tank adopts brick-concrete structure;

[0035] ③ Anaerobic digestion

[0036] The sewage in the primary sedimentation tank is discharged to the UASB anaerobic tank. After the waste water is distributed through the bottom perforated pipe water distribution system, the waste water flows from bottom to top at a certain flow rate and agitated by a large amount of biogas produced in the anaerobic process. The...

technical field

[0001] The invention relates to a sewage treatment process, in particular to an ecological cycle treatment process for domestic sewage in market towns. Background technique

[0002] With the continuous improvement of my country's urbanization level, there are nearly 50,000 small towns in the country. The domestic sewage in these small towns is directly discharged without treatment, causing serious pollution to the water environment. At present, the domestic treatment of this kind of wastewater adopts biological methods, that is, aerobic, anaerobic, and facultative oxygen treatment systems. Although this treatment system has the characteristics of high processing load and strong processing capacity, the disadvantage is that it is a one-time investment. The second is to adopt the artificial wetland system, that is, to use abandoned or idle farmland, depressions, ponds, etc. to transform them into aquatic plants, crushed stone coal beds, microorganisms, etc. Se...

Examples

Embodiment 1

[0030] see figure 1 , the process steps of the present invention are as follows:

[0031] ① Sewage collection

[0032] After the sewage is collected by the sewage collection pipe network, an artificial screen and a mechanical grille are installed at the end of the main sewage outlet to remove the coarse solid debris in the sewage. screen;

[0033] ② Solid-liquid separation

[0034] Flow the sewage into the advection primary sedimentation tank, stay for 4 hours, and settle the large suspended matter in the sewage to realize solid-liquid separation. The primary sedimentation tank adopts brick-concrete structure;

[0035] ③ Anaerobic digestion

[0036] The sewage in the primary sedimentation tank is discharged to the UASB anaerobic tank. After the waste water is distributed through the bottom perforated pipe water distribution system, the waste water flows from bottom to top at a certain flow rate and agitated by a large amount of biogas produced in the anaerobic process. The...

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