CN112093997A

CN112093997A - Treatment method of waste water of wine village

Info

Publication number: CN112093997A
Application number: CN202011038540.0A
Authority: CN
Inventors: 尹伟康; 孙毓苓
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-28
Filing date: 2020-09-28
Publication date: 2020-12-18

Abstract

The invention relates to the field of wastewater treatment of food enterprises, in particular to a treatment method of waste water of a wine village. The invention mixes the waste water with the domestic sewage which is added with the disinfectant and is treated by anaerobic fermentation, then carries out anaerobic treatment and then carries out aeration treatment. The invention combines the anaerobic treatment and the aeration, utilizes the function of anaerobic bacteria to hydrolyze, acidify and methanize organic matters, removes the organic matters in the wastewater, improves the biodegradability of the sewage, is beneficial to the subsequent aerobic treatment, has stable operation, high treatment efficiency, simple and convenient process flow and low energy consumption, and simultaneously realizes the zero discharge of the wastewater.

Description

Treatment method of waste water of wine village

Technical Field

The invention relates to the field of wastewater treatment of food enterprises, in particular to a treatment method of waste water of a wine village.

Background

Wine is an alcoholic beverage made by fermenting grape juice. The production process comprises the following steps: selecting grape raw materials, crushing, separating, clarifying, fermenting (adding yeast), storing wine base, blending, and canning. The waste water of wine village is composed of two parts of production waste water and domestic sewage, fermentation waste water and cleaning waste water are mainly produced in the production process, the fermentation waste water mainly contains organic acid, saccharide and conversion substances thereof, and the cleaning waste water mainly contains cleaning agent, disinfectant and the like. The waste water of the wine village has the characteristics of small discharge amount, high organic matter concentration and strong seasonality, and has obvious influence on the environment.

Most of the existing processes for treating the waste water of the wine village are economic and effective biological treatment processes, but the conventional biological treatment system has the problems of difficult stable operation, complex process and low effluent reuse rate because the growth and the propagation of microorganisms are easily influenced by various factors.

Disclosure of Invention

1. Problems to be solved

Aiming at the problem of poor treatment effect of the waste water of the wine village in the prior art, the invention provides a treatment method of the waste water of the wine village, which mixes the waste water with domestic sewage containing disinfectant and then carries out anaerobic treatment, then carries out aeration treatment, utilizes the action of anaerobic bacteria to hydrolyze, acidify and methanize organic matters, removes the organic matters in the waste water, improves the biodegradability of the sewage, is beneficial to subsequent aerobic treatment, greatly simplifies the water treatment process under the condition of ensuring the sewage treatment effect, and simultaneously solves the problem of poor treatment effect of the waste water of the wine village.

2. Technical scheme

In order to solve the problems, the technical scheme adopted by the invention is as follows:

the invention relates to a method for treating waste water of a wine village, which comprises production waste water and domestic sewage; adding a disinfectant into the domestic sewage, then carrying out anaerobic pre-fermentation, mixing the pre-fermented domestic sewage with the production wastewater, then carrying out anaerobic treatment, carrying out aeration treatment on the mixed wastewater after the anaerobic treatment, and discharging water after precipitation.

Preferably, the specific steps are as follows:

s100, pretreating the waste water of the wine village; the pretreatment comprises the steps of adjusting the pH and the water quantity of the production wastewater, wherein the water quantity of the production wastewater is 5-6m 3/d;

s200, sequentially filtering and precipitating the pretreated effluent;

s300, adding a disinfectant into the domestic sewage, and then performing anaerobic pre-fermentation;

s400, mixing the wastewater with the domestic sewage subjected to anaerobic pre-fermentation treatment, and introducing the mixed wastewater into an anaerobic reactor for anaerobic treatment;

s500, introducing the mixed wastewater subjected to the anaerobic reaction into an aeration type biological filter;

s600, introducing the aerated wastewater into a storage tank, and discharging water after secondary sedimentation.

Preferably, the temperature of the anaerobic pre-fermentation is T₁The treatment temperature of the anaerobic treatment is T₂，T₁≤T₂。

Preferably, the disinfectant is sodium hypochlorite.

Preferably, the COD concentration in the mixed wastewater is 1000-1800mg/L, the BOD concentration is 850-1000mg/L, and the SS concentration is 200-450 mg/L.

Preferably, in S100, the pH of the wastewater is adjusted to 6.5-8.5.

Preferably, the specific method of the precipitation in S200 is to introduce the wastewater into a precipitation tank for precipitation, and the hydraulic retention time of the wastewater in the precipitation tank is 5-6 d.

Preferably, the filtering is performed using a grill in S200, the grill being disposed at an inclination angle of 60 °.

Preferably, the treatment time of the anaerobic treatment is 6-8h, and the treatment temperature T is₂Is 20-25 ℃.

Preferably, the temperature T of the anaerobic pre-fermentation₁Is 20-30 ℃.

3. Advantageous effects

(1) The treatment method of the waste water of the wine village of the invention, carry on the anaerobic treatment after mixing waste water and domestic sewage treated by anaerobic fermentation, aerate mixed waste water; the mixing of the wastewater and the domestic sewage can improve the biodegradability of the wastewater and also can improve the number of flora in the sewage; the anaerobic treatment device combines the anaerobic treatment and the aeration treatment, realizes stable operation and has high treatment efficiency; moreover, the wine brewing seasonality is strong, and the juice squeezing season is only 3-5 months, so that the method greatly simplifies the process flow, is convenient for operation management and operation, reduces the operation cost, reduces the energy consumption, and further solves the problems of complicated process and poor treatment effect of the waste water treatment of the wine village.

(2) According to the treatment method of the waste water of the wine village, the disinfection waste water in the production process disinfects the domestic sewage again, so that the environmental pollution is reduced, the disinfection waste water is recycled, the cost is saved, and meanwhile, the influence of a disinfectant with too high content on subsequent fermentation can be prevented.

(3) The invention relates to a method for treating waste water of a wine village, which comprises the steps of filtering impurities in the waste water through a grid screen, removing suspended matters in the waste water through a sedimentation tank, removing organic matters through an anaerobic reactor, and further purifying the waste water through aeration; the anaerobic tank utilizes the function of anaerobic bacteria to hydrolyze, acidify and methanize organic matters, remove the organic matters in the wastewater, improve the biodegradability of the sewage and facilitate the subsequent aerobic treatment; the aeration tank provides a certain sewage retention time to meet the oxygen quantity required by aerobic microorganisms and the mixing condition of full contact of sewage and activated sludge, so as to achieve the aim of further evolving the wastewater.

(4) According to the treatment method of the waste water of the wine village, the anaerobic pre-fermentation temperature is slightly higher than the treatment temperature of anaerobic treatment, so that the growth and the propagation of microorganisms are promoted, the metabolism rate of the microorganisms is accelerated, and the decomposition degree of organic matters is improved.

(5) According to the treatment method of the waste water of the wine village, fruit stalks, fruit particles and the like filtered by the grating are collected and then delivered to surrounding farmers to be used as feed; the sludge in the storage pool is dehydrated and then used for fertilizing in a grape plantation; the treated wastewater is used for grape planting and irrigation, so that the problem of water shortage in arid areas is solved; the biogas generated by the anaerobic reaction is used for generating electricity, so that the secondary utilization of energy is realized.

Drawings

FIG. 1 is a process flow diagram of the present invention.

Detailed Description

The invention is further described below with reference to the accompanying drawings. The invention is described in detail below with reference to specific exemplary embodiments. It will, however, be understood that various modifications and changes may be made without departing from the scope of the invention as defined in the appended claims. The detailed description and drawings are to be regarded as illustrative rather than restrictive, and any such modifications and variations are intended to be included within the scope of the present invention as described herein. Furthermore, the background is intended to be illustrative of the state of the art as developed and the meaning of the present technology and is not intended to limit the scope of the invention or the application and field of application of the invention.

Example 1

The invention provides a method for treating waste water of a wine village, which is used for treating production waste water and domestic sewage generated by the wine village, as shown in figure 1, the waste water and the domestic sewage which is treated by anaerobic fermentation are mixed and then are subjected to anaerobic treatment, the mixed waste water is subjected to aeration treatment after the anaerobic treatment, and water is discharged after precipitation. Further, the COD concentration in the mixed wastewater is 1000-1800mg/L, the BOD concentration is 850-1000mg/L, and the SS concentration is 200-450 mg/L. The production wastewater mainly comprises wine fermentation wastewater and cleaning wastewater generated after cleaning of production equipment. The fermentation wastewater mainly contains organic acid, saccharide and their conversion substances, and the cleaning wastewater mainly contains cleaning agent, disinfectant, etc.

As shown in figure 1, after the production wastewater is filtered by a grating, the filtered fruit stalks and fruit particles can be used as animal feed, and the cleaning wastewater containing disinfectant in the production wastewater is introduced into a septic tank and mixed with the domestic wastewater to be treated. Further, a three-grid septic tank can be used as a pre-fermentation tank body, and the temperature T of anaerobic pre-fermentation₁Is 20-30 ℃. The filtered effluent enters an anaerobic tank to be mixed with the domestic wastewater subjected to fermentation pretreatment after the water quality and the water quantity of the filtered effluent are regulated by a sedimentation regulating tank, enters an aeration tank to be aerated after anaerobic fermentation, and finally enters a storage tank to be sedimentated to obtain the effluent. It is worth mentioning that the treatment temperature T of the anaerobic treatment₂Greater than or equal to the temperature T of anaerobic pre-fermentation₁After the domestic sewage and the production wastewater are mixed, the abundance of the microbial population is reduced, so that the environmental temperature needs to be increased, the growth and the propagation of the microorganisms are promoted, the metabolism rate of the microorganisms is accelerated, and the decomposition degree of organic matters is further improved. The sludge in the sedimentation tank can flow back to the aeration tank and can also be used as fertilizer after dehydration. The method comprises the following specific steps:

s100, pretreating the waste water of the wine village; the pretreatment comprises adjusting pH and water content of wastewater to 5-6m³The pH of the waste water generally needs to be adjusted to 6.5-8.5;

s200, filtering the pretreated effluent by using a grating and then precipitating; the barrier is obliquely arranged, the inclination angle is 60 degrees, the grid bars of the barrier are round steel grid bars, the width is 0.02m, the gap between the grid bars is 0.02m, and fruit stalks and fruit grains can be effectively removed; wherein the specific method of the precipitation comprises the steps of introducing the wastewater into a precipitation tank for precipitation, wherein the hydraulic retention time of the wastewater in the precipitation tank is 5-6 d;

s300, mixing the wastewater with the domestic sewage treated by anaerobic fermentation, introducing the mixed wastewater into an anaerobic reactor for anaerobic reaction, wherein biogas generated during anaerobic reaction fermentation can be used for combustion power generation; the domestic sewage is generally treated by anaerobic fermentation through a three-grid septic tank; the reaction time of the anaerobic reaction is 6-8h, and the reaction temperature is 20-25 ℃; further, before domestic sewage is mixed, the domestic sewage needs to be disinfected, the disinfection method is to mix the production equipment cleaning wastewater containing sodium hypochlorite and the domestic sewage subjected to anaerobic fermentation in the three-grid septic tank, and generally, when the production equipment is cleaned, the added sodium hypochlorite is about 0.15-0.21kg/m³A large amount of sodium hypochlorite remains in the cleaning wastewater after cleaning, and the concentration of the sodium hypochlorite is about 0.01-0.19kg/m³Can be used as a disinfectant for domestic sewage;

s400, introducing the mixed wastewater subjected to the anaerobic reaction into an aeration type biological filter;

s500, introducing the aerated wastewater into a storage tank, and discharging water after secondary sedimentation.

The invention mixes the waste water with the domestic sewage which contains disinfectant and is anaerobic pre-fermented, then carries on anaerobic treatment, then aerates the mixed waste water. The waste water is mixed with domestic sewage, so that the biodegradability of the waste water can be improved, and the number of floras in the sewage can be increased. Moreover, sodium hypochlorite containing a disinfectant can decompose Extracellular Polymeric Substances (EPS) of the sludge, and can break through the limitation of a sludge floc structure, accelerate the hydrolysis process in anaerobic treatment, so that the SCOD content in the water body of the domestic sewage is increased, nutrients are provided for microorganisms in subsequent anaerobic reactions, and the activity of anaerobic microorganisms is improved. The anaerobic treatment device combines the anaerobic treatment and the aeration treatment, realizes stable operation and has high treatment efficiency. Moreover, the seasonality of grape fermentation is strong, the juicing season is only 3-5 months, the real-time operation is not needed, the process is complicated, the energy consumption is increased, and the treatment efficiency is low by using the traditional wastewater treatment process. The method greatly simplifies the process flow, is convenient for operation management and operation, reduces the operation cost, reduces the energy consumption, and further solves the problems of complicated process and poor treatment effect of the waste water treatment of the wine village.

It is worth to be noted that the effluent treated by the invention can reach the agricultural irrigation standard, which is detailed in table 1. Therefore, the effluent of the invention can be used as irrigation water and discharged to a grape planting base for reuse treatment.

TABLE 1 Dry farming Standard in Farmland irrigation Water quality Standard (GB5084-2005)

In this example, the present invention was used to treat wastewater from a vinegary of the hillside of Ningxia Helan orchid. 900 tons of wine are produced in a certain vinar garden on the mountain foot of Ningxia Helan orchid, and the production amount of waste water is about 5m³/d(450m³Production period 3 months), in addition 8 dealers, domestic sewage production was 154m³/a。

1 sewage treatment station is arranged for treating project wastewater, and the total floor area is 180m²Processing capacity 40m³And d. The capacity of the pretreatment adjusting tank is 204m³The hydraulic retention time is 5d, and the pH value of the adjusted wastewater is 6.5-7.5. The effective volume of the anaerobic tank is 30.6m³The hydraulic retention time is 6h, and the reaction temperature is 20-25 ℃. Effective volume of aeration tank is 40.8m³And the hydraulic retention time is 8 h. The COD of the raw water quality of the project wastewater is 1800mg/L, BOD₅1000mg/L, SS is 200 mg/L. The COD of the effluent water is 100mg/L, BOD₅Is 20mg/L, SS of70mg/L, and the treated effluent is used for irrigation of plant area grape bases.

Example 2

The basic contents of example 2 are the same as those of example 1, except that the treatment target in this example is wastewater from a wine village in Yongning county, Yin Chuan City. 990 tons of wine are produced in the village, the main production period of the project is mainly concentrated in 9-10 months per year, and the water consumption of the project for life is about 216m through calculation³A, the domestic sewage production amount is 172.8m based on 80 percent of water consumption³A is calculated. The project production wastewater mainly comes from the cleaning of production line equipment (tank), ground washing and bottle washing of filling line. Wherein the cleaning water of the production line equipment (tank) is 343m³A, the water consumption for ground washing is about 146m³A, the water consumption for washing bottles in a filling line is about 80m³A, 200m of water for natural gas boiler³A is calculated. The wastewater generation amount is 80 percent of the water consumption amount, and then the wastewater generation amount is 274.4m³/a、116.8m³/a、64m³/a、160m³A, total 788m of project wastewater production³/a。

1 sewage treatment station is arranged for treating the production wastewater, and the total occupied area is 200m²Processing capacity 50m³And d. The capacity of the pretreatment adjusting tank is 224m³The hydraulic retention time is 5d, and the pH value of the adjusted wastewater is 7.0-8.5. Effective volume of anaerobic tank is 36m³The hydraulic retention time is 6h, and the reaction temperature is 20-25 ℃. Effective volume of aeration tank is 48m³And the hydraulic retention time is 8 h. The concentrations of main pollutants COD, BOD and SS of the project are respectively 1000mg/L, 850mg/L and 450mg/L, the effluent treated by the self-built sewage treatment station meets the water quality standard of farmland irrigation, and the COD and BOD₅The SS concentrations are respectively 160mg/L, 50mg/L and 80mg/L, and the method can be used for irrigation of subsequent grape planting bases.

More specifically, although exemplary embodiments of the invention have been described herein, the invention is not limited to these embodiments, but includes any and all embodiments modified, omitted, combined, e.g., between various embodiments, adapted and/or substituted, as would be recognized by those skilled in the art from the foregoing detailed description. The limitations in the claims are to be interpreted broadly based the language employed in the claims and not limited to examples described in the foregoing detailed description or during the prosecution of the application, which examples are to be construed as non-exclusive. Any steps recited in any method or process claims may be executed in any order and are not limited to the order presented in the claims. The scope of the invention should, therefore, be determined only by the appended claims and their legal equivalents, rather than by the descriptions and examples given above.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control. When "mass, concentration, temperature, time, or other value or parameter is expressed as a range, preferred range, or as a range defined by a list of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. For example, a range of 1 to 50 should be understood to include any number, combination of numbers, or subrange selected from 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, or 50, and all fractional values between the above integers, e.g., 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, and 1.9. With respect to sub-ranges, specifically consider "nested sub-ranges" that extend from any endpoint within the range. For example, nested sub-ranges of exemplary ranges 1-50 may include 1-10, 1-20, 1-30, and 1-40 in one direction, or 50-40, 50-30, 50-20, and 50-10 in another direction. "

Claims

1. A treatment method of waste water of a wine village is characterized by comprising the following steps: the waste water of the wine village comprises production waste water and domestic sewage; adding a disinfectant into the domestic sewage, then carrying out anaerobic pre-fermentation, mixing the pre-fermented domestic sewage with the production wastewater, then carrying out anaerobic treatment, carrying out aeration treatment on the mixed wastewater after the anaerobic treatment, and discharging water after precipitation.

2. The method for treating the waste water of the wine village according to the claim 1, which comprises the following steps:

s100, pretreating the waste water of the wine village; the pretreatment comprises the regulation of the pH and the water quantity of the production wastewater, wherein the water quantity of the production wastewater is 5-6m³/d；

S200, sequentially filtering and precipitating the pretreated effluent;

3. The method for treating waste water of wine village as claimed in claim 1, characterized by that: the temperature of the anaerobic pre-fermentation is T₁The treatment temperature of the anaerobic treatment is T₂，T₁≤T₂。

4. The method for treating waste water of wine village as claimed in claim 1, characterized by that: the disinfectant is sodium hypochlorite.

5. The method for treating waste water of wine village as claimed in claim 1, characterized by that: the COD concentration in the mixed wastewater is 1000-1800mg/L, the BOD concentration is 850-1000mg/L, and the SS concentration is 200-450 mg/L.

6. The method for treating waste water of wine village as claimed in claim 2, characterized by that: in S100, the pH value of the wastewater is adjusted to 6.5-8.5.

7. The method for treating waste water of wine village as claimed in claim 2, characterized by that: the specific method of the precipitation in the S200 is to introduce the wastewater into a precipitation tank for precipitation, wherein the hydraulic retention time of the wastewater in the precipitation tank is 5-6 d.

8. The method for treating waste water of wine village as claimed in claim 2, characterized by that: and S200, filtering by using a grating, wherein the grating is obliquely arranged at an inclination angle of 60 degrees.

9. The method for treating waste water of wine village as claimed in claim 3, characterized by that: the treatment time of the anaerobic treatment is 6-8h, and the treatment temperature T₂Is 20-25 ℃.

10. The method for treating waste water of wine village as claimed in claim 9, characterized by that: the temperature T of the anaerobic pre-fermentation₁Is 20-30 ℃.