CN201390682Y - Mobile integrated biological pollution wastewater treatment device - Google Patents

Abstract

The utility model belongs to the technical field of environmental engineering water pollution treatment and control, in particular to a mobile integrated biologically polluted wastewater treatment device. It is composed of a dosing module, a reaction module, a sludge treatment module and an electric control cabinet. The modules are connected by pipes and valves. The dosing module includes a dosing tank, a tap water inlet, a dosing tank agitator and a dosing pump; processing Modules include pH adjustment tank, coagulation sedimentation tank, Fenton oxidation tank, sewage inlet, lift pump, regulating valve, sewage pipe and sludge discharge pipe; sludge treatment module includes sludge tank, plate and frame filter press and screw pump , The electric control cabinet is respectively connected to the agitator and various pumps. The whole device can be placed in a container. After the biologically polluted wastewater is treated by this device, the water quality reaches or exceeds the second-level discharge standard of the "Pollutant Discharge Standard for Urban Sewage Treatment Plants (GB8918-2002)", and can be directly discharged into the sewer. The utility model has the advantages of simple structure, novel concept, flexible use, good treatment effect and small occupied area.

Description

Mobile integrated biological pollution wastewater treatment device

technical field

The utility model belongs to the technical field of environmental engineering water pollution treatment and control, in particular to a mobile integrated biologically polluted wastewater treatment device.

Background technique

Bio-economy has become another new economic growth point in our country. Bio-science and technology have developed rapidly in the pharmaceutical industry, medical industry, agriculture, etc., and are widely used. They play an indispensable role in alleviating the contradictions of population, resources and environment faced by mankind missing roles. But its own potential threats and risks have increasingly aroused people's general attention and vigilance. Biologically active substances produced in biological laboratories, genetically engineered bacteria, viruses, and cancer cells obtained by mutating or constructing organisms through artificial mutagenesis and genetic engineering in the laboratory, as well as mutagens used in the laboratory , biochemical drugs, etc. Once these substances enter the environment, they will pose a huge threat to human health and ecological security.

Generally speaking, the water quality characteristics of biological laboratory wastewater are 1) high content of organic pollutants (CODcr), whose main components are laboratory chemicals, organic solvents, and dead microbial residues; 2) laboratory sewage It also contains a relatively large amount of detergent ingredients such as anionic surfactant (LAS); 3) The total number of bacteria is relatively high, usually on the order of 10 ⁵ -10 ⁶ , and may contain genetically engineered bacteria, pathogenic bacteria, etc.; 4) Contains biologically active substances (such as DNA fragments), viruses, cancer cells, etc.

A large number of literature research shows that there is still a lack of effective treatment methods for biological laboratory wastewater at home and abroad. Most of the biological laboratory wastewater is directly discharged to the urban drainage network and enters the urban sewage treatment plant. Its transportation process in the urban drainage network It will pose a threat to human health and ecological safety, and the urban sewage treatment plant does not have a targeted treatment process for this type of wastewater. It is very dangerous to human health and ecological safety during the treatment process or after the water is discharged.

To remove organic pollutants in wastewater, the main treatment methods include aerobic biological treatment, advanced chemical oxidation, adsorption, etc., especially aerobic biological treatment is widely used. However, studies have found that the LAS contained in biological laboratory wastewater produces a large amount of foam during aeration, which makes the microorganisms lose and cannot be carried out. The same problem also exists when advanced chemical oxidation methods such as ozone are used. Moreover, neither biological treatment nor adsorption method can effectively disinfect and sterilize the bacteria and viruses in biological laboratory wastewater, nor can it effectively remove LAS. The main treatment methods for removing LAS in wastewater are: coagulation sedimentation method, foam separation method, etc. Foam separation method can effectively remove LAS in wastewater, but it cannot remove other dissolved organic matter in wastewater, nor can it effectively disinfect and sterilize bacteria and viruses in biological laboratory wastewater, and the equipment of foam separation method is expensive , high energy consumption. Coagulation-sedimentation equipment investment and operating energy consumption are relatively low. However, it is difficult to remove small-molecular organic matter by coagulation-sedimentation alone. Coagulation-sedimentation can only remove large-molecular organic matter through electroneutralization and co-precipitation, while small-molecular organic matter remains in wastewater, leading to the removal of CODcr. The efficiency is low, and the efficiency of removing LAS is also relatively low. And the same as the foam separation method, it cannot effectively treat dissolved organic matter, bacteria and viruses in biological laboratory wastewater.

The main treatment methods for removing bacteria and viruses in wastewater include: liquid chlorine, ozone and other strong oxidizing substances for disinfection and sterilization, or UV disinfection. Conventional disinfection methods (such as liquid chlorine disinfection) can inactivate bacteria in wastewater, but the treatment efficiency for viruses, gene fragments, and cancer cells is not high enough, and chlorine disinfection methods will produce chlorinated disinfection by-products and other environments Ecologically harmful substances. UV disinfection will not form toxic disinfection by-products, but the treatment efficiency of bacteria, viruses, gene fragments and cancer cells in wastewater is not high enough, and the germs after UV disinfection are easy to revive after exposure to light, which is not very reliable. And the methods except ozone are all very weak to the degradation and removal function of organic pollutants. For biologically polluted wastewater, it is necessary to sterilize the genetically engineered bacteria, cancer cells, viruses, etc., and to effectively remove the organic pollutants therein.

Contents of the invention

The purpose of the utility model is to propose a highly efficient mobile integrated biologically polluted wastewater treatment device.

The mobile integrated biologically polluted wastewater treatment device proposed by the utility model is composed of a dosing module, a reaction module, a sludge treatment module and an electric control cabinet 15, and the modules are connected by pipelines and valves, wherein,

The dosing module includes a dosing tank 1, a tap water pipe 29, a tap water inlet faucet 2, a dosing tank agitator 25 and a dosing pump 26. There is tap water inlet faucet 2, and the water inlet faucet 2 is connected to tap water pipe 29, and the dosing tank 1 is provided with a dosing tank agitator 25 and a dosing pump 26;

The treatment module includes pH adjustment tank 5, coagulation sedimentation tank 7, Fenton oxidation tank 9, sewage water inlet 11, lift pump 12, regulating valve 23, sewage pipe 27 and mud discharge pipe 28, pH adjustment tank 5, coagulation sedimentation Both pool 7 and Fenton oxidation pool 9 are equipped with agitator 16. The top of pH adjustment pool 5 is provided with water inlet 6, water inlet 6 is connected to sewage pipe 27, and one side of pH adjustment pool 5 is provided with outlet pipe 17, and outlet pipe 17 Water outlets are arranged according to different heights. The bottom of the pH adjustment tank 5 is conical, and the bottom of the cone is provided with a mud discharge port 20, which is connected to a mud discharge pipe 28; the coagulation sedimentation tank 7 is provided with a water inlet 8, The water inlet 8 is connected to the sewage pipe 27, and the side of the coagulation sedimentation tank 7 is provided with an outlet pipe 18, and the outlet pipe 18 is provided with drains according to different heights. Port 21, mud discharge port 21 is connected to mud discharge pipe 28; Fenton oxidation tank 9 is provided with water inlet 10, water inlet 10 is connected to sewage pipe 27, Fenton chlorination tank 9 side is provided with water outlet pipe 19, water outlet pipe 19 Drain outlets are provided at different heights, and the conical bottom of the Fenton oxidation pond 9 is provided with a mud discharge outlet 22, and the mud discharge outlet 22 is connected to the mud discharge pipe 28; one end of the sewage pipe 27 is provided with a sewage water inlet 11, and a sewage water inlet 11 Connect lift pump 12;

The sludge treatment module includes a sludge tank 13, a plate and frame filter press 3 and a screw pump 4. One end of the sludge discharge pipe 28 is connected to the bottom of the sludge tank 13, and the sludge tank 13 and the plate and frame filter press 3 are connected through a sludge discharge pipeline 14 . The screw pump 4 is located at the bottom of the plate and frame filter press 3, the bottom of the sludge tank 13 is conical, and a mud discharge port 24 is provided below the conical bottom;

The electric control cabinet 15 is respectively connected with the agitator 16, the agitator 25 of the dosing tank, the dosing pump 26, the screw pump 4, and the lifting pump 12.

In the utility model, the whole device can be placed in a container to achieve the purpose of mobile processing. After the biologically polluted wastewater is treated by this system, the water quality reaches or exceeds the second-level discharge standard of the "Pollutant Discharge Standard for Urban Sewage Treatment Plants (GB8918-2002)", and can be directly discharged into the sewer pipe, achieving the purpose of integrated treatment.

The working process of the present utility model is as follows:

(1) The solid or concentrated liquid of the drug is put into the dosing tank, diluted with water, and set aside.

(2) Biologically polluted wastewater is pumped into the pH adjustment tank, and dilute H ₂ SO ₄ (30%) is added into the pH adjustment tank as a pH regulator to reduce the pH of the wastewater to about 2, and stir for 10-30 minutes. Perform initial sterilization.

(3) After the initial sterilization, the wastewater enters the coagulation sedimentation tank, and NaOH is added to adjust it to be neutral, and CaO is added to chemically react with LAS in the wastewater to form a small precipitate suspension. The molar dosage of CaO is equivalent to 0.75- 1.0 times, chemical reaction time 10-20min. Add PAFCS for rapid stirring (300r/min), the mixing time is 1-2min, the dosage is 40-60mg/L; add PAM0.5-1.0mg/L, the flocculation time is 15-30 minutes, this process is in Slow stirring (60r/min) to ensure the formation of large particle flocs; standing for 45-60 minutes, a large number of flocs sink to the bottom of the sedimentation tank to be removed, and the removal rate of CODcr in the wastewater after sedimentation reaches more than 60%. The removal rate of LAS reaches more than 50%, and some bacteria are removed at the same time; the sludge is discharged into the sludge tank.

(4) The wastewater supernatant after precipitation enters the Fenton oxidation tank for Fenton oxidation. The operating condition is that the dosage of H ₂ O ₂ is 0.044-0.18mol/L, and the dosage of ferrous sulfate is mol(H ₂ O ₂ )/ Dosing with a mol(Fe ²⁺ ) ratio of 20:0.5-20:2, adjusting the pH of the solution at 2-4 with acid, and reacting for 3.5-5.5 hours, stirring at a medium speed (100r/min) during this process, and treating the effluent CODcr is less than 100mg/L; add NaOH or CaO to adjust the pH of the effluent to neutral; discharge after 90-120 minutes of sedimentation in the secondary sedimentation tank. The sludge is discharged into the sludge tank.

(5) The sludge is collected after being processed by a plate and frame mud compactor.

The beneficial effects of the utility model are that the utility model has the advantages of simple structure, novel concept, flexible use, good treatment effect and small occupied area.

Description of drawings

Fig. 1 is the top view illustration of the structure diagram of the present utility model.

Fig. 2 is a side view of the reaction module of the utility model.

Fig. 3 is a side view of the dosing module of the present invention.

Numbers in the figure: 1 is the dosing tank, 2 is the tap water inlet, 3 is the plate and frame mud compactor, 4 is the screw pump, 5 is the pH adjustment tank, 6 is the water inlet of the pH adjustment tank, and 7 is the coagulation sedimentation tank , 8 is the water inlet of the coagulation sedimentation tank, 9 is the Fenton oxidation tank, 10 is the water inlet of the Fenton oxidation tank, 11 is the sewage water inlet, 12 is the lift pump, 13 is the sludge tank, 14 is the sludge discharge pipe, 15 16 is the reaction tank mixer, 17 is the outlet pipe of the pH adjustment tank, 18 is the outlet pipe of the coagulation sedimentation tank, 19 is the outlet pipe of the Fenton oxidation tank, 20 is the mud outlet of the pH adjustment tank, and 21 is the coagulation The sludge discharge port of the sedimentation tank, 22 is the sludge discharge port of the Fenton oxidation tank, 23 is the valve, 24 is the sludge discharge port of the sludge tank, 25 is the agitator, 26 is the dosing pump, 27 is the sewage pipe, and 28 is the sludge discharge pipe , 29 is a water pipe.

Detailed ways

Further illustrate the utility model below by embodiment in conjunction with accompanying drawing.

Example 1: The capacity of this device to treat biologically polluted wastewater is 4 tons/day. The main design parameters and dimensions of the device are as follows:

The size of the whole container is 5.69m×2.13m×2.18m. The material of the dosing tank 1 is plastic, and the size is 0.56m×0.56m×0.98m. The water pipe of the dosing tank is made of UPVC material, DN20mm. The pool body structure of the pH adjustment tank 5, the coagulation sedimentation tank 7, and the Fenton (Fenton) oxidation tank 9 are all made of plastic, with a size of Ф1.2m and a height of 1.87 m, the maximum volume in use is 1.4m ³ . The sewage pipe 27 is a Φ0.4m UPVC pipe. The mud discharge pipe 28 adopts UPVC pipe, DN80mm. Add dilute H ₂ SO ₄ (30%) into the pH adjustment tank 5 as a pH adjuster to lower the pH of the waste water to about 2, and stir for 10-30 minutes. Afterwards, the wastewater enters the coagulation sedimentation tank 7 through the lifting pump, and NaOH is added to adjust it to be neutral, and CaO is added to chemically react with LAS in the wastewater to form a small sediment suspension. The molar dosage of CaO is equivalent to 0.75-1.0 of the molar concentration of LAS Times, chemical reaction time 10-20min. Add PAFCS for rapid stirring (300r/min), the mixing time is 1-2min, and the dosage is 4060mg/L; add PAM0.5-1.0mg/L, the flocculation time is 15-30 minutes, and the process is stirred slowly (60r/min), let stand for 45-60 minutes. The sludge is discharged into the sludge pool 13, the sludge pool 13 is made of plastic material, the size is Ф0.8m, and the height is 1m. The wastewater supernatant enters the Fenton oxidation tank for Fenton oxidation, the operating condition is that the dosage of H ₂ O ₂ is 0.044-0.18mol/L, and the dosage of ferrous sulfate is according to mol(H ₂ xO ₂ )/mol(Fe ²⁺ ) Dosing at a ratio of 20:0.5-20:2, adjusting the pH of the solution to 2-4 with acid, and reacting for 3.5-5.5 hours, during which medium-speed stirring (100r/min) is carried out. Add NaOH or CaO to adjust the pH of the effluent to be neutral; after 90-120 minutes of sedimentation in the secondary sedimentation tank, discharge. The sludge is discharged into the sludge tank 13. The above device was used to treat wastewater from a biological laboratory in a university. The test water sample conditions: COD 810mg/L, LAS 140mg/L, pH 6.65, SS 140mg/L, NH ₃ -N, TN, TP were 3.03mg/L , 8.36mg/L, 1.05mg/L, the total number of bacteria was 3.4×10 ⁴ CFU/mL, ATP was 2.62×10 ⁴ RLU/mL, and the biological toxicity was poisonous. Effluent COD is less than 76mg/L; NH ₃ -N, TN, TP are 1.34mg/L, 2.82mg/L, 0.06mg/L respectively; LAS is less than 10mg/L, the removal rate reaches 96%, and the removal rate of the total number of bacteria 100%, the biological activity ATP is 0, and the biological toxicity test results show that the inhibition rate of luminescent bacteria is less than 30%, which is slightly toxic.

Example 2:

The structure of the device is the same as in Example 1, and the obtained device is used to treat the laboratory wastewater of a high-tech park medicine valley building, the water quality parameters COD: 1550mg/L, LAS: 4.47mg/L, pH7.5, SS 45mg/L , NH ₃ -N 4.3mg/L, T-N 7.1mg/L, TP 0.36mg/L, total bacterial count 2.4×10 ⁵ CFU/mL, ATP 9.8×10 ³ RLU/mL, biological toxicity is poisonous. The content of LAS in the treated water is less than 2mg/L, and the removal rate of COD is over 85%; the removal rate of COD is over 90%; NH ₃ -N 2.9mg/L, TN 5.0mg/L, TP 0.12mg/L; The removal rate is 100%, the biological activity ATP is 0, and the inhibition rate of biotoxicity index luminescent bacteria is less than 30%, which is slightly toxic.

Claims (2)

1, a kind of mobile integrated biotic pollution wastewater treatment equipment is made up of dosing module, reaction module, sludge treatment module and electrical control cubicles (15), and each intermodule is connected with valve through pipeline, it is characterized in that:

Dosing module grug feeding jar (1), running water pipe (29), tap water water-in tap (2), grug feeding jar agitator (25) and dosing pump (26), grug feeding jar (1) is 6, center, each grug feeding jar (1) top is equipped with tap water water-in tap (2), water-in tap (2) connects running water pipe (29), is provided with grug feeding jar agitator (25) and dosing pump (26) in the grug feeding jar (1);

Processing module comprises pH regulator pond (5), coagulative precipitation tank (7), Fenton oxidation pond (9), sewage inlet (11), lift pump (12), regulated valve (23), waste pipe (27) and shore pipe (28), pH regulator pond (5), be equipped with agitator (16) .pH equalizing tank (5) top in coagulative precipitation tank (7) and the Fenton oxidation pond (9) and be provided with water-in (6), water-in (6) connects waste pipe (27), pH regulator pond (5) one sides are provided with rising pipe (17), rising pipe (17) is provided with water port according to different heights, tapered at the bottom of the pond in pH regulator pond (5), conical lower portion is provided with mud discharging mouth (20), and mud discharging mouth (20) connects shore pipe (28); Coagulative precipitation tank (7) is provided with water-in (8), water-in (8) connects waste pipe (27), coagulative precipitation tank (7) one sides are provided with rising pipe (18), rising pipe (18) is provided with water port according to different heights, tapered at the bottom of coagulative precipitation tank (7) pond, conical lower portion is provided with mud discharging mouth (21), and mud discharging mouth (21) connects shore pipe (28); Fenton oxidation pond (9) top is provided with water-in (10), water-in (10) connects waste pipe (27), Fenton chlorinated chamber (9) one sides are provided with rising pipe (19), rising pipe (19) is provided with water port according to different heights, base cone shape bottom, Fenton oxidation pond (9) pond is provided with mud discharging mouth (22), and mud discharging mouth (22) connects shore pipe (28); Waste pipe (27) one ends are provided with sewage inlet (11), and sewage inlet (11) connects lift pump (12);

The sludge treatment module comprises sludge sump (13), plate-and-frame filter press (3) and spiral pump (4), and shore pipe (28) one ends connect sludge sump (13) bottom, and sludge sump (13) is connected by spoil disposal pipeline (14) with plate-and-frame filter press (3).Spiral pump (4) is positioned at plate-and-frame filter press (3) bottom, and the bottom of sludge sump (13) is tapered, and the conical lower portion below is provided with mud discharging mouth (24);

Electrical control cubicles (15) connects agitator (16), grug feeding jar agitator (25), dosing pump (26), spiral pump (4), lift pump (12) respectively.

2, mobile integrated biotic pollution wastewater treatment equipment according to claim 1 is characterized in that whole device is placed in the freight container.

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