CN105314798B - A kind of grid septic tank of green ecological four and sewage water treatment method - Google Patents

Abstract

The invention relates to a green ecological four-compartment septic tank and a sewage treatment method, which belong to the field of construction technology. Water pipes, the septic tank is divided into primary corrosion room, deep corrosion room, clarification room and special cleaning supplementary corrosion room through partitions, wherein the primary corrosion room, deep corrosion room and clarification room are adjacent in sequence, and the primary corrosion room The chamber and the deep corrosion chamber are also adjacent to the special cleaning and supplementary corrosion chamber; the invention has obvious advantages such as strong load-bearing capacity, long service life, acid and alkali corrosion resistance, convenient installation, no leakage, and good sewage treatment effect, especially in It solves the problem of insufficient time for feces to ferment and decompose during cleaning, and kills harmful bacteria to the greatest extent.

Description

A kind of green ecological four compartment septic tank and sewage treatment method

technical field

The invention belongs to the technical field of construction, in particular to a green ecological four-compartment septic tank and a sewage treatment method.

Background technique

The septic tank is a device for treating feces and filtering and sedimenting; the principle is that the solidified matter decomposes at the bottom of the pool, and the hydrated objects on the upper layer flow into the pipeline to prevent the pipeline from being blocked, and provide enough water for the solidified objects (feces and other garbage) Time hydrolysis; septic tank refers to a small-scale treatment structure that separates domestic sewage for sedimentation and anaerobically digests sludge.

The earliest septic tanks originated in Europe in the 19th century and have a history of more than 100 years; the original purpose of setting up septic tanks in urban living areas was to collect fertilizers. , Septic tanks have played a positive role in protecting water bodies; nowadays, in many large cities in my country, the role of septic tanks in providing fertilizer for agricultural production has basically disappeared, and septic tanks have become one of the basic measures for environmental protection.

Septic tank is a basic sludge treatment facility and also a pretreatment facility for domestic sewage. Its functions are as follows: 1. To ensure the environmental sanitation of the living community and avoid the spread of domestic sewage and pollutants in the living environment. 2. In the working environment of anaerobic corrosion in septic tanks, kill mosquito eggs. 3. Temporary storage of sludge, organic sludge undergoes anaerobic decomposition, and the matured organic sludge can be used as agricultural fertilizer. 4. Pretreatment of domestic sewage (primary treatment), precipitate impurities, and hydrolyze macromolecular organic substances into small molecular organic substances such as acids and alcohols to improve subsequent sewage treatment.

Septic tank is a treatment facility that uses the principle of sedimentation and anaerobic fermentation to remove suspended organic matter in domestic sewage. It is a primary transitional living treatment structure; domestic sewage contains a lot of feces, paper scraps, pathogens... The solid concentration of suspended solids is 100-350mg/L, the concentration of organic matter CODCr is between 100-400mg/L, and the concentration of suspended organic matter BOD5 is 50-200mg/L; the sewage enters the septic tank after 12-24h of precipitation, can be Remove 50% to 60% of suspended matter; the settled sludge is decomposed by anaerobic fermentation for more than 3 months, so that the organic matter in the sludge is decomposed into stable inorganic matter, and the perishable raw sludge is converted into stable cooked Sludge changes the structure of sludge and reduces the moisture content of sludge. Regularly remove the sludge and transport it to landfill or use it as fertilizer. Requirements: The calculated volume of the sedimentation part and the corrosion part of the septic tank should be determined according to Article 4.8.4~4.8.7 of the "Code for Design of Water Supply and Drainage for Buildings" (GB50015-2003); the residence time of sewage in the septic tank should be determined by 12h～24h. For sewage treatment systems without sludge disposal, the volume of septic tanks should also include the volume of sludge storage.

The application of traditional septic tanks has a history of more than 100 years. The technical route is the contact mode of sewage and sludge. The deposited sludge is digested and degraded to produce digested gas such as biogas, carbon dioxide, and hydrogen sulfide. Disturbance is generated, and the disturbing effect of digested gas on sludge can make sludge and biological flora more fully mixed, which is helpful for digestion and degradation. However, the sludge at the bottom rises with the digested gas, and after the air bubbles escape, the sludge settles down again, and the sludge that rises and settles pollutes the sewage again.

Under the technical mode of septic tank sewage and sludge contact and mixing, the sedimentation and effluent water quality of the septic tank are affected, and the sewage residence time needs to be extended to improve the sedimentation effect and effluent water quality. The sewage residence time is generally 12 to 24 hours.

The three-phase separation septic tank technology is based on the traditional septic tank, retaining the advantages of mud-water mixing in the septic tank, and adding the three-phase separation technology of "sewage, sludge, and digested gas". A three-phase separation device is installed at the water outlet to separate the sludge and digested gas at the water outlet from the sewage treatment process, so as to avoid the interference of air flotation on sewage treatment. The sedimentation tank at the water outlet refers to the technical standard of the advection sedimentation tank, and the sewage sedimentation time is within 2 hours.

The volume of the septic tank is composed of sewage volume and sludge volume. The sewage residence time in the three-phase separation septic tank is 4-6 hours, compared with the sewage residence time in the mud-water mixed septic tank of 12-24 hours. The effective volume is saved, and the saved effective volume can store more sludge.

The basic principle of the septic tank is to remove and kill parasite eggs and germs by using the sedimentation effect of the proportion of parasite eggs greater than that of the fecal-urine mixture and the principles of feces closed anaerobic fermentation, liquefaction, ammoniation, and biological antagonism, etc. Mosquitoes and flies breed, so as to achieve the purpose of harmless feces. The three-compartment septic tank is composed of three connected pools, and the middle is connected by a feces pipe. It is mainly based on the principle that the proportion of anaerobic fermentation, the middle layer of feces, and the proportion of parasite eggs is higher than that of the general mixed solution and is easy to settle. The feces are in the pool. After more than 30 days of fermentation and decomposition, the manure liquid in the middle layer flows from the first pond to the third pond in order to achieve the purpose of precipitating or killing parasite eggs and intestinal pathogenic bacteria in the feces, and the manure liquid in the third pond becomes high-quality fertilizer.

The volume of the three-compartment septic tank should be determined according to the number of users, the amount of flushing water, the time for feces to ferment and decompose, and the requirements for sterilization of eggs. The feces fermentation time and pathogen death time are calculated on the basis of 30 days, of which 20 days are required in the first pond, 10 days in the second pond, and the volume of the third pond is at least the sum of the two ponds.

As a traditional environmental protection facility with a history of more than 100 years, septic tanks have played an important role. However, with the progress of society and the development of urban modernization, problems that deviate from social development have also emerged, which need to be resolved urgently, mainly in the following areas:

1. Disposal of sludge

According to the technical standards of septic tanks, the sludge cleaning time of septic tanks is generally 90 days, 180 days, and 360 days, and the cleaned sludge can be used as organic fertilizers or for harmless disposal; however, as With the wide use of chemical fertilizers and the development of society, the use of feces fertilizers is becoming less and less. At the same time, the sludge disposal industry in my country is seriously lagging behind, and the harmless treatment of fecal sludge is insufficient. 1.36 billion people in my country produce more than 100 million tons of feces every year Sludge, according to statistics from the Bureau of Statistics, in 2012, only 8.014 million tons of fecal sludge was harmlessly treated. The removal and transfer of a large amount of fecal sludge has caused secondary pollution; therefore, if the problem of harmless disposal of septic tank sludge cannot be solved, septic tank sludge will become a source of water pollution, and the problem of septic tanks is Environmental issues related to the effectiveness of water pollution control.

2. Blockage of septic tank

The septic tank deposits sludge, the bottom is sedimentary sludge, the surface is floating sludge, and the middle is suspended sludge and sewage. The septic tank is divided into two septic tanks or three septic tanks by partition walls. If the septic tank is not cleared in time, when the sludge deposited in the septic tank exceeds the height of the water hole, the sludge will block the hole and cause the septic tank to be blocked; The blockage of septic tanks has seriously affected the normal life of users, and it is an urgent problem in the application of septic tanks.

Contents of the invention

Aiming at the shortcomings of the prior art, the present invention proposes a green ecological four-compartment septic tank and a sewage treatment method to achieve the purpose of solving the problem of insufficient fermentation of feces during sludge removal.

A green ecological four-compartment septic tank, the septic tank includes a top plate, a partition, a side plate, a bottom plate, a water inlet pipe, a water outlet pipe, a primary water pipe, a secondary water pipe, and the septic tank is divided into The primary corrosion room, deep corrosion room, clarification room and special cleaning supplementary corrosion room, wherein the primary corrosion room, deep corrosion room and clarification room are adjacent to each other in sequence, and the primary corrosion room and deep corrosion room are supplemented with special cleaning Corruption chambers are adjacent;

The water inlet pipe is arranged in the primary corrosion chamber, the water outlet pipe is arranged in the clarification chamber, a primary water pipe is provided between the primary corrosion chamber and the deep corrosion chamber, and a secondary water passage is provided between the deep corrosion chamber and the clarification chamber. water pipe;

The inspection port is set on the top plate of the primary corrosion chamber and the deep corrosion chamber, and the cleaning port is set on the top plate of the clarification chamber and the special cleaning supplementary corrosion room; The bottom of the plate is evenly equipped with a plurality of switch-type dredging ports for primary corrosion chambers; switch-type scum outlets are provided on the middle and upper part of the partition between the primary corrosion chamber and the special dredging supplementary corrosion chamber; between the deep corrosion chamber and the special dredging The bottom of the partition between the supplementary corrosion chambers is uniformly equipped with a plurality of switch-type dredging ports for deep corrosion chambers; switch-type scum outlets are arranged at the middle and upper parts of the partitions between the deep corrosion chambers and the special dredging supplementary corrosion chambers.

The top surface of the bottom plate of the primary corrosion chamber and the deep corrosion chamber is at the same height as the bottom of the switch-type dredging port of the primary corrosion chamber and the switch-type dredging port of the deep corrosion chamber, and the top surface of the bottom plate of the primary corrosion chamber and the deep corrosion chamber is from The switch-type dredging port of the primary corrosion chamber and the switch-type dredging port of the deep corrosion chamber form an ascending slope of 0.05-0.1 to the opposite side plate.

The bottom plate of the special dredging supplementary corrosion chamber is set horizontally, and the height difference between its top surface and the switch-type dredging port of the primary corrosion chamber and the switch-type dredging port of the deep corrosion chamber is 50-100mm.

The primary corrosion chamber is a storage space for 20 to 30 days, and the deep corrosion chamber is a storage space for 10 to 20 days.

The sewage treatment method adopts the green ecological four-compartment septic tank. When the primary corrosion chamber or the deep corrosion chamber is cleaned, the switch-type scum outlet is first opened so that the scum enters the special cleaning and supplementary corrosion chamber, and the switch is turned off after completion. Open the switch-type dredging port of the primary corrosion chamber or the switch-type dredging port of the deep corrosion chamber, and then close the switch-type dredging port of the primary corrosion chamber or the switch-type dredging port of the deep corrosion chamber; carry out supplementary corrosion processing, and finally clearing.

Beneficial effects of the present invention:

The invention proposes a green ecological four-compartment septic tank and a sewage treatment method. The invention has obvious advantages such as strong load-bearing capacity, long service life, acid and alkali corrosion resistance, convenient installation, no leakage, and good sewage treatment effect, especially It solves the problem of insufficient time for feces to ferment and decompose during cleaning, and kills harmful bacteria to the greatest extent.

Description of drawings

Fig. 1 is a top view schematic diagram of a green ecological four grid septic tank of an embodiment of the present invention;

Fig. 2 is the A-A sectional schematic diagram of Fig. 1 of an embodiment of the present invention;

Fig. 3 is a schematic cross-sectional view of B-B of Fig. 1 according to an embodiment of the present invention.

In the figure, 1 is the primary corrosion room; 2 is the deep corrosion room; 3 is the clarification room; 4 is the special sludge cleaning supplementary corrosion room; 5 is the inspection port; 6 is the cleaning port; 7 is the water inlet pipe; 8 is the outlet Water pipe; 9 is the switch-type scum outlet; 10 is the switch-type dredging port of the primary corrosion chamber; 11 is the switch-type dredging port of the deep corrosion chamber; 12 is the top plate; 13 is the partition; 14 is the side plate; 15 is the floor ; 16 is a primary water pipe; 17 is a secondary water pipe.

detailed description

An embodiment of the present invention will be further described below in conjunction with the accompanying drawings.

In the embodiment of the present invention, as shown in Figures 1 and 2, the green ecological four-compartment septic tank includes a top plate 12, a partition plate 13, a side plate 14, a bottom plate 15, an inlet pipe 7, an outlet pipe 8, and a primary water pipe 16 , secondary water pipe 17, the septic tank is divided into primary corrosion chamber 1, deep corrosion chamber 2, clarification chamber 3 and special cleaning supplementary corrosion chamber 4 through partition 13, wherein, primary corrosion chamber 1, deep corrosion chamber 2 Adjacent to the clarification chamber 3 in sequence, the primary corrosion chamber 1 and the deep corrosion chamber 2 are also adjacent to the special cleaning supplementary corrosion chamber 4;

In the embodiment of the present invention, as shown in Fig. 2, the water inlet pipe 7 is set in the primary corrosion chamber 1, the water outlet pipe 8 is set in the clarification chamber 3, and a level water pipe 16, and a secondary water pipe 17 is set between the deep corrosion chamber 2 and the clarification chamber 3; inspection ports 5 are provided on the top plate 12 of the primary corrosion chamber 1 and the deep corrosion chamber 2, and the clarification chamber 3 and the special cleaning chamber A dredging opening 6 is provided on the top plate 12 of the supplementary corrosion chamber 4; three switch-type dredging ports 10 of the primary corrosion chamber are uniformly arranged at the bottom of the partition 13 between the primary corrosion chamber 1 and the special dredging supplementary corrosion chamber 4; A switch-type scum outlet 9 is provided on the middle and upper part of the partition between the primary corrosion chamber 1 and the special cleaning and supplementary corrosion chamber 4; 2 holes are uniformly arranged on the bottom of the partition 13 between the deep corrosion chamber 2 and the special cleaning and supplementary corrosion chamber 4 A switch-type dredging port 11 in a deep corrosion chamber; a switch-type scum outlet 9 is provided on the middle and upper part of the partition 13 between the deep corrosion chamber 2 and the special dredging supplementary corrosion chamber 4.

In the embodiment of the present invention, as shown in Figure 3, the top surface of the bottom plate 15 of the primary corrosion chamber 1 and the deep corrosion chamber 2 is connected to the switch type dredging port 10 of the primary corrosion chamber and the switch type dredging port 11 of the deep corrosion chamber. The bottoms are at the same height, and the top surface of the bottom plate 15 of the primary corrosion chamber 1 and the deep corrosion chamber 2 forms an ascending slope of 0.05 to 0.1 from the switch-type dredging port 10 of the primary corrosion chamber and the switch-type dredging port 11 of the deep corrosion chamber to the opposite side plate The bottom plate 15 of the special dredging supplementary corrosion chamber 4 is set horizontally, and the height difference h between its top surface and the switch-type dredging port 10 of the primary corrosion chamber and the switch-type dredging port 11 of the deep corrosion chamber is 50~ 100mm.

In the embodiment of the present invention, the primary corrosion chamber is a storage space for 20 to 30 days, and the deep corrosion chamber is a storage space for 10 to 20 days; when the primary corrosion chamber or deep corrosion chamber is cleaned, first turn on the switch Type scum outlet allows scum to enter the special dredging supplementary corrosion chamber, close the switch type scum outlet after completion, then open the switch type dredging port of the primary corrosion chamber or the switch type dredging port of the deep corrosion chamber, and close it after completion The switch-type dredging port of the primary corrosion room or the switch-type dredging port of the deep corrosion room; carry out supplementary corrosion treatment for 30 days, and finally carry out dredging.

Claims (5)

1. a kind of grid septic tank of green ecological four, the septic tank includes top plate, dividing plate, side plate, bottom plate, water inlet pipe, outlet pipe, one Level cross water pipe, two grades cross water pipe, it is characterised in that the septic tank by dividing plate be divided into primary corruption room, depth degenerate room, it is clear Clear room and special clear draw supplement corruption room, wherein, primary corruption room, depth corruption room and clarifying chamber are adjacent successively, and described is first Level corruption room and depth corruption room also with special clear to draw supplement corruption room adjacent；

Described water inlet pipe is arranged at that primary corruption is indoor, and described outlet pipe is arranged in clarifying chamber, primary corruption room with Depth corruption sets one-level to cross water pipe between room, is degenerated in depth and sets two grades to cross water pipe between room and clarifying chamber；

Opens up inspection socket on the top plate of described primary corruption room and depth corruption room, described clarifying chamber and special draw supplement clearly Opened up on the top plate for degenerating room and draw mouth clearly；Set in primary corruption room and the bottom even of the special clear space bar for drawing supplement corruption room It is equipped with multiple primary corruption room switching regulator desiltings mouthful；On in primary corruption room and the special clear space bar for drawing supplement corruption room Portion sets switching regulator scum silica frost to cross mouth；Room is degenerated in depth and the bottom even of the special clear space bar for drawing supplement corruption room is provided with Multiple depth corruption room switching regulator desiltings mouthful；Room is degenerated in depth and the middle and upper part of the special clear space bar for drawing supplement corruption room is set Put switching regulator scum silica frost and cross mouth.

2. the grid septic tank of green ecological four according to claim 1, it is characterised in that described primary corruption room and depth Plate top surface and the bottom of primary corruption room switching regulator desilting mouthful, depth corruption room switching regulator desilting mouthful for degenerating room are same high, and The plate top surface of primary corruption room and depth corruption room is clear from primary corruption room switching regulator desilting mouthful and depth corruption room switching regulator Upstroke slope of the silt mouth to opposite side plate shape into 0.05~0.1.

3. the grid septic tank of green ecological four according to claim 1, it is characterised in that described special clear supplement of drawing is degenerated The floor level of room is set, and between its top surface and primary corruption room switching regulator desilting mouthful and depth corruption room switching regulator desilting mouthful Difference in height be 50~100mm.

4. the grid septic tank of green ecological four according to claim 1, it is characterised in that described primary corruption room is 20 days The storage area of~30 days, depth corruption room is the storage area of 10 days~20 days.

5. the sewage water treatment method carried out using the grid septic tank of green ecological four described in claim 1, it is characterised in that originally Level corruption room or depth corruption room be when drawing clearly, is first turned on switching regulator scum silica frost and crosses mouth and enter scum silica frost special clear to draw supplement corruption Room, finishes rear closing switch formula scum silica frost and crosses mouth, then opens primary corruption room switching regulator desilting mouthful or depth corruption room switching regulator is clear Silt mouth, closes primary corruption room switching regulator desilting mouthful or depth corruption room switching regulator desilting mouthful after finishing；Carry out at supplement corruption Reason, is finally drawn clearly again.