CN214571349U - Wastewater treatment system for dazomet - Google Patents

Abstract

The utility model discloses a dazomet effluent disposal system, including dazomet waste water storage tank (1), sediment filter (2), wet oxidation tower (3), equalizing basin (4), UASB reactor (5), A pond (6) and O pond (7), sedimentation tank (8) and clean water basin (9) that loop through the pipe connection, sludge impoundment (10) are still connected through mud pipe way (13) in sedimentation tank (8). The wastewater treatment system adopting the scheme can realize harmless treatment of sewage.

Description

Wastewater treatment system for dazomet

Technical Field

The utility model relates to a wastewater treatment system, in particular to a dazomet wastewater treatment system.

Background

Dazomet is a typical example of the N & S composition. It is an unstable product that decomposes in wastewater to Methyl Isothiocyanate (MIC) which is also highly toxic to bacteria. Therefore, appropriate measures should be taken to ensure efficient biological treatment. At present, a treatment system specially aiming at wastewater with dazomet is lacked in the prior art.

Those skilled in the art have therefore endeavored to develop a treatment system for waste water with dazomet.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a treatment system for waste water containing dazomet,

in order to realize the above purpose, the utility model provides a dazomet effluent disposal system, including dazomet effluent storage tank (1), sediment filter (2), wet oxidation tower (3), equalizing basin (4), UASB reactor (5), A pond (6) and O pond (7), sedimentation tank (8) and clean water basin (9) that loop through the pipe connection, sludge impoundment (10) are still connected through row mud pipeline (13) in sedimentation tank (8).

Furthermore, a nitrifying liquid backflow pipeline is further arranged between the tank A and the tank O, the water inlet end of the nitrifying liquid backflow pipeline is connected with the tank O, and the water outlet end of the nitrifying liquid backflow pipeline is connected with the tank A.

Further, be connected with the mud back flow between mud pipe and the A pond, mud pipe is connected to the end of intaking of mud back flow, the play water end connection A pond of mud back flow.

Furthermore, the set conditions of the wet oxidation tower are that the temperature is 125-320 degrees, the pressure is 0.5-20 Mpa, and oxygen is used as an oxidant.

The utility model has the advantages that: 1. the wastewater containing the dazomet possibly contains higher suspended matters, so a precipitation filter is arranged before wet oxidation to remove the suspended matters, the treatment efficiency of the wet oxidation is improved, and the operation cost is reduced; 2. the treatment method can collect and perform physicochemical pretreatment on the dazomet wastewater independently, and can improve the treatment efficiency to the maximum extent.

In addition, the dazomet waste water is firstly collected in the storage tank, enters into the sediment filter, most suspended matters and residues in the waste water are removed, the sediment is discharged into a sludge pond for filter pressing, the supernatant enters into a low-temperature wet oxidation process, and proper temperature and pressure are added in a wet oxidation tower, so that the organic matters are quickly oxidized, and the effect of ring opening and chain breaking is achieved. The wastewater enters an adjusting tank after being subjected to wet oxidation pretreatment, is mixed with other wastewater without containing the dazomet and then enters a UASB reactor through a lift pump for anaerobic biological treatment, and the anaerobic biological treatment utilizes the metabolic characteristics of anaerobic microorganisms, takes reduced organic matters as hydrogen acceptors under the condition of not providing exogenous energy and simultaneously generates methane gas with energy value. The effluent after anaerobic biological treatment in UASB reactor is fed into A/O biochemical pool, and under the condition of sufficient oxygen supply in aerobic pool, NH is nitrified by autotrophic bacteria₃Oxidation of-N (NH 4 +) to NO₃Return to tank A under reflux control and denitrification of heterotrophic bacteria under anoxic conditions to convert NO₃Reduction to molecular nitrogen (N)₂) C, N, O, the ecological cycle is completed, and the sewage harmless treatment is realized. The utility model discloses dazomet effluent disposal system effluent disposal is effectual, work efficiency is high, can reach the effect of detoxicating.

Drawings

FIG. 1 is a schematic structural view of a wastewater treatment system using a dazomet reactor according to the present invention;

FIG. 2 is a statistical table of data before and after wet oxidation of wastewater.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples, wherein it is noted that, in the description of the invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular manner, and therefore should not be construed as limiting the present invention. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in figure 1, the utility model provides a dazomet effluent disposal system, including the dazomet waste water storage tank 1, sediment filter 2, wet oxidation tower 3, equalizing basin 4, UASB reactor 5, A pond 6, O pond 7, sedimentation tank 8 and the clean water basin 9 that loop through the pipe connection, sedimentation tank 8 still connects sludge impoundment 10 through row's mud pipeline 13. Wherein the set conditions of the wet oxidation tower 3 are that the temperature is 125-320 degrees, the pressure is 0.5-20 Mpa, and oxygen is used as an oxidant. The dazomet waste water is collected at first in the storage tank, enters into the sediment filter, gets rid of most suspended solid and residue in the waste water, and the precipitate is discharged and is carried out the filter-pressing in the sludge impoundment, and the supernatant fluid then enters into low temperature wet oxidation technology, adds suitable temperature and pressure in the wet oxidation tower for the organic matter is oxidized fast, reaches the effect of ring-opening broken chain.

The A pool 6 and the O pool 7 are A/O biochemical pools, a water inlet end pipeline of the A pool 6 is connected with a water outlet end of the UASB reactor 5, and a water outlet end pipeline of the A pool 6 is connected with a water inlet end of the O pool 7; the water outlet end of the O tank 7 is connected with the water inlet end of the sedimentation tank 8 through a pipeline. A sludge return pipe 12 is connected between the sludge discharge pipe 13 and the A pool 6, the water inlet end of the sludge return pipe 12 is connected with the sludge discharge pipe 13, and the water outlet end of the sludge return pipe 12 is connected with the A pool 6.

A nitrifying liquid backflow pipeline 11 is also arranged between the A tank 6 and the O tank 7, the water inlet end of the nitrifying liquid backflow pipeline 11 is connected with the O tank 7, and the water outlet end of the nitrifying liquid backflow pipeline 11 is connected with the A tank 6. The effluent after anaerobic biological treatment in UASB reactor is fed into A/O biochemical pool, and under the condition of sufficient oxygen supply in aerobic pool, NH is nitrified by autotrophic bacteria₃Oxidation of-NNH 4+ to NO₃Return to tank A under reflux control and denitrification of heterotrophic bacteria under anoxic conditions to convert NO₃Reduction to molecular nitrogen N₂C, N, O, the ecological cycle is completed, and the sewage harmless treatment is realized. FIG. 2 shows that the treatment effect of the wastewater is remarkable through a data statistical table before and after wet oxidation.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims (4)

1. A dazomet effluent disposal system, characterized by: including cotton-ring wastewater storage tank (1), sediment filter (2), wet oxidation tower (3), equalizing basin (4), UASB reactor (5), A pond (6) and O pond (7), sedimentation tank (8) and clean water basin (9) that loop through the pipe connection, sludge impoundment (10) are still connected through mud pipe (13) in sedimentation tank (8).

2. The dazomet wastewater treatment system according to claim 1, wherein: a water inlet end pipeline of the A pool (6) is connected with a water outlet end of the UASB reactor (5), and a water outlet end pipeline of the A pool (6) is connected with a water inlet end of the O pool (7); and the water outlet end pipeline of the O tank (7) is connected with the water inlet end of the sedimentation tank (8).

3. The dazomet wastewater treatment system according to claim 2, wherein: a pond (6) with still be equipped with nitrify liquid return line (11) between O pond (7), nitrify the end of intaking of liquid return line (11) and connect O pond (7), nitrify the play water end of liquid return line (11) and connect A pond (6).

4. The dazomet wastewater treatment system according to claim 2, wherein: be connected with mud back flow (12) between mud pipe (13) and A pond (6), mud pipe (13) are connected to the end of intaking of mud back flow (12), A pond (6) are connected to the play water end of mud back flow (12).

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