A device suitable for underground sewage infiltration treatment and its application method

Abstract

The invention relates to the field of environmental engineering and in particular provides a device suitable for subsurface infiltration treatment of wastewater and a use method of the device. According to the technical scheme, the device is characterized by comprising an upper groove, a lower groove, a water inlet pipe and a vent pipe, wherein a grid supporting plate is arranged at the bottom of the upper groove; a water inlet pipe interface is arranged on the upper side surface of the upper groove and is in threaded connection with the water inlet pipe; a water distribution pipe is arranged at a part, which is 2-4cm away from the top, in the upper groove; the upper groove is filled with light ceramsite with the particle size of 2-3cm or plastic bio-fillers; the lower groove is similar to the upper groove in shape; a lower groove body is 3-5cm wider than an upper groove body and is used for draining the wastewater; the lower groove is filled with 20-100-mesh sand; the upper groove and the lower groove are combined by virtue of a foot plate.

Description

technical field [0001] The invention relates to the field of environmental engineering, in particular to a device for underground sewage percolation treatment and a use method thereof. Background technique [0002] The sewage underground infiltration treatment method usually refers to the controlled dosing of sewage into the soil after pretreatment, the sewage diffuses under the action of gravity and soil capillary force, and in the process of migration through physical interception, physical and chemical adsorption , chemical precipitation, microbial degradation, animal and plant action and other factors are purified. The underground infiltration treatment method has the advantages of good water quality, low construction and operation costs, simple management, no damage to the landscape, no odor, no sludge, and effective removal of nitrogen and phosphorus. Therefore, it has become increasingly important at home and abroad. sewage treatment methods. [0003] However, the t...

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Problems solved by technology

[0003] However, the traditional sewage underground infiltration treatment system often has the following defects: 1. After the water distribution device is completed, it cannot be adjusted twice, and it is difficult to overcome the problem of uneven water distribution caused by soil settlement.

The water distribution pipes of the traditional sewage underground infiltration treatment system are located under the soil as a whole, and cannot be adjusted after completion

Due to the excavation, backfilling and other engineering measures of the underground infiltration system have destroyed the stable structure of the original soil, and are affected by factors such as the hydraulic scouring of the underground infiltration system for a long time, the underground infiltration system is very easy to cause settlement, so that the distribution of water pipes is difficult. Inhomogeneity, resulting in local water inflow, resulting in a large amount of untreated sewage being discharged from the settlement device, directly affecting the quality of the effluent water

For example, the authorized announcement numbers are CN101638289B, CN101982431B, CN1182048C, CN1927733A and other invention patents. Although the uniformity of water distribution of the device is improved by increasing the strengthening of water distribution materials, improving the structure of water distribution pipes, and multi-layer water distribution, the water distribution of the above-mentioned invention patents None of the facilities have secondary adjustment capabilities, that is, they are buried below the ground at one time during the construction of the device and are an integral structure. When subsequent subsidence causes excessive local water inflow, timely adjustments and modifications cannot be made to the local area, and the entire device can only be excavated. Start rebuilding, and when the same situation occurs in the later period, it can only be pushed back to start again, resulting in a lot of waste of resources

2. Traditional underground infiltration systems often do not have the ability to flexibly control the amount and location of water distribution

Because the ventilation pipes and water distribution pipes of the traditional underground infiltration system communicate with each other and form a whole, when a part is damaged, it is difficult to replace the part because the local pipe network is integrated with other pipe networks. Timely maintenance affects the stability of effluent water quality

For example, the invention patents with the authorization numbers CN201381238Y and CN202080988U, the water distribution pipe network and other components communicate with each other and are not independent of each other, making maintenance difficult

4. The ventilation pipes and other structures of traditional underground infiltration devices are often located at the bottom of the device. On the one hand, the increased pressure of the incoming air makes the ventilation cost higher. On the other hand, ventilation at the bottom of the device can provide the system with the ability to remove ammonia nitrogen and organic matter. , but it is difficult to effectively treat nitrate nitrogen

For example, for invention patents with authorization numbers CN201825778U and CN1242926C, the air distribution pipes are located at the lower part of the device. On the one hand, it is difficult to ventilate. On the other hand, after the ammonia nitrogen is converted into nitrate nitrogen through ventilation, the nitrification zone is located at the bottom of the device. is quickly discharged from the device, and the denitrification effect is poor

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