CN110937677A - Method for washing breeding house with breeding wastewater for recycling - Google Patents
Method for washing breeding house with breeding wastewater for recycling Download PDFInfo
- Publication number
- CN110937677A CN110937677A CN201911143129.7A CN201911143129A CN110937677A CN 110937677 A CN110937677 A CN 110937677A CN 201911143129 A CN201911143129 A CN 201911143129A CN 110937677 A CN110937677 A CN 110937677A
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- Prior art keywords
- breeding
- wastewater
- washing
- aquaculture
- recycling
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
Abstract
The invention provides a method for washing a breeding house by breeding wastewater, which comprises the following steps: adding concentrated sulfuric acid into the aquaculture wastewater for acidification, continuously stirring in the adding process, and adjusting the pH value of the aquaculture wastewater to 5.5-6.5; then storing the acidified aquaculture wastewater for at least 30 days; and finally, washing the breeding house by using the supernatant of the stored breeding wastewater. The invention can effectively reduce the volatilization of ammonia in the aquaculture wastewater, and the number of faecal coliform bacteria in the aquaculture wastewater reaches the requirement of harmless treatment, so that the aquaculture wastewater is safely recycled, and the production of the aquaculture wastewater is reduced.
Description
Technical Field
The invention relates to the technical field of agricultural waste resource utilization, in particular to a method for flushing a breeding house with breeding wastewater for recycling.
Background
With the rapid development of large-scale livestock farms in China, the discharge amount of livestock and poultry breeding wastewater is increased rapidly, the livestock and poultry breeding wastewater becomes one of important discharge sources of agricultural non-point source pollution and discharge of greenhouse gases and ammonia gases, and the treatment and utilization of the breeding wastewater becomes an important factor limiting the rapid development of livestock and poultry breeding industries in China at present. The breeding house is flushed by the breeding wastewater after being treated, so that the use of exogenous flushing water is reduced, and the total amount of the breeding wastewater is reduced.
At present, the standard related to the recycling of the aquaculture wastewater in China is mainly implemented according to design specifications for building reclaimed water (GB50336-2002) and design specifications for sewage recycling (GB50335-2002), and no technical specification related to the recycling of the aquaculture wastewater washing culture houses exists, and three indexes including pH, color/turbidity, faecal coliform flora number and the like in the design specifications for building reclaimed water (GB50336-2002) and the design specifications for sewage recycling (GB50335-2002) are referred to and screened as the technical indexes for the recycling of the aquaculture wastewater washing culture houses. The breeding wastewater contains a large amount of pathogenic microorganisms, livestock and poultry can be infected with pathogenic bacteria by directly washing the breeding house with the breeding wastewater, and meanwhile, a large amount of ammonia gas can be released from the breeding wastewater, so that the pH value is too high or too low to cause discomfort to the animals by directly using the breeding wastewater, and the three indexes are screened out to be used as technical indexes for flushing the breeding house with liquid dung for recycling.
The prior art (CN109133516A) discloses a method for recycling aquaculture wastewater, wherein the low-concentration wastewater obtained by evaporation and concentration is feasible for washing aquaculture houses, but the investment of the treatment method is high, and a large amount of ammonia gas is released into the environment during the treatment of liquid dung, which is harmful to environmental safety.
Disclosure of Invention
The invention aims to provide a method for flushing a breeding house with breeding wastewater for recycling, which can effectively reduce the volatilization of ammonia gas in the breeding wastewater, ensure that the number of faecal coliform bacteria in the breeding wastewater meets the requirement of harmless treatment, ensure that the breeding wastewater is recycled safely, and reduce the generation of the breeding wastewater, thereby overcoming the defects in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for washing a breeding house with breeding wastewater comprises the following steps:
(1) adding concentrated sulfuric acid into the aquaculture wastewater for acidification, continuously stirring in the adding process, and adjusting the pH value of the aquaculture wastewater to 5.5-6.5;
(2) storing the acidified aquaculture wastewater for at least 30 days;
(3) and washing the breeding house by using the supernatant of the stored breeding wastewater.
Wherein, the pH value can be completed by adopting a pH on-line detector.
Furthermore, the volume fraction of the added concentrated sulfuric acid accounts for 1-5 per mill of the aquaculture wastewater.
Further, the breeding wastewater comprises one or more of dry clear manure and liquid manure of a pig farm, a dairy farm or a beef farm, and liquid parts of water-washed manure and water-soaked manure in a livestock and poultry farm after solid-liquid separation.
Further, the original pH value of the aquaculture wastewater is 6.5-8.5, and the solid content is less than 5%.
Furthermore, the concentrated sulfuric acid is industrial concentrated sulfuric acid with the mass fraction of 96%, and the adding mode is that the concentrated sulfuric acid is firstly diluted and then slowly added into the culture wastewater from an acid storage tank by an acid adding pump.
Further, in the step (2), when the acidified aquaculture wastewater is stored, the surface of the aquaculture wastewater in the storage pond is uniformly covered with crushed straws, the crushed length of the straws is 5-15 cm, and the covering thickness of the straws is 3-6 cm.
Further, the straw is one or more of dry corn straw, wheat straw or rice straw.
And (3) further, enabling the acidified and stored aquaculture wastewater to pass through a three-stage sedimentation tank and then enter a reclaimed water reuse tank to obtain aquaculture wastewater supernatant, and pumping the aquaculture wastewater supernatant in the reclaimed water reuse tank to a aquaculture house through a pipeline pump for flushing.
Further, before the step (3), the method further comprises the steps of firstly adopting a dry manure cleaning mode to clean solid manure in the breeding house, and then pumping the supernatant of the breeding wastewater in the reclaimed water recycling pool to the breeding house for flushing through a pipeline.
Further, after the step (3), the method further comprises the step of washing the cultivation house with clear water after the cultivation house is washed with the supernatant of the cultivation wastewater.
The invention discloses a method for washing a breeding house by breeding wastewater, which has the beneficial effects that:
(1) the livestock and poultry breeding house can be flushed by the livestock and poultry breeding wastewater, and the yield of the breeding wastewater is reduced.
(2) The emission of the ammonia gas in the breeding wastewater can be reduced by more than 90%, and the stimulation of the ammonia gas released in the recycling of the breeding wastewater to the respiratory system of livestock and poultry is reduced.
(3) Can realize the harmless treatment of the faecal coliform population in the aquaculture wastewater, and can safely recycle the aquaculture wastewater.
Detailed Description
The technical solutions of the present invention are described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In a more typical embodiment of the present invention, a method for washing a breeding house with breeding wastewater comprises the following steps:
(1) adding concentrated sulfuric acid into the aquaculture wastewater for acidification, continuously stirring in the adding process, and adjusting the pH value of the aquaculture wastewater to 5.5-6.5;
wherein the volume fraction of the added concentrated sulfuric acid accounts for 1-5 per mill of the aquaculture wastewater. The breeding wastewater comprises dry clear manure and liquid dung of a pig farm, a dairy cow farm or a beef farm, and one or more of liquid parts of water-washed manure and water-soaked manure in a livestock and poultry farm after solid-liquid separation. The original pH value of the aquaculture wastewater is 6.5-8.5, and the solid content is less than 5%. The concentrated sulfuric acid is industrial concentrated sulfuric acid with the mass fraction of 96%, and the adding mode is that the concentrated sulfuric acid is firstly diluted and then is slowly added into the culture wastewater from an acid storage tank by an acid adding pump.
(2) Storing the acidified aquaculture wastewater for at least 30 days; when the acidified aquaculture wastewater is stored and treated, the surface of the aquaculture wastewater in the storage pond is uniformly covered with crushed straws, the crushed length of the straws is 5-15 cm, and the covering thickness is 3-6 cm. The straw is one or more of dry corn straw, wheat straw or rice straw.
(3) Firstly, cleaning solid dung in the breeding house by adopting a dry dung cleaning mode, then washing the breeding house by adopting the supernatant of the stored breeding wastewater, and finally washing the breeding house by adopting clear water. Specifically, the culture wastewater after acidification storage passes through a three-stage sedimentation tank and then enters a reclaimed water reuse tank to obtain culture wastewater supernatant, and the culture wastewater supernatant in the reclaimed water reuse tank is pumped to a culture house through a pipeline pump for flushing.
Example 1
The example takes the recycling of the pig breeding wastewater as an example, and illustrates a method for washing the breeding house with the breeding wastewater for recycling. The method comprises the following steps:
(1) 1m is3Introducing the culture wastewater generated by the dry manure cleaning mode into an acidification adjusting tank, slowly adding 4.0L of concentrated sulfuric acid diluent, continuously stirring, adjusting the pH value of the wastewater to 6.0, and then adjusting the discharge flux of ammonia gas to 6.87mg/m2The livestock and poultry breeding wastewater is derived from the piggery wastewater of the dry manure cleaning process, the solid-liquid separation is not carried out, the pH is 8.25, the number of manure coliform groups is 5.4 multiplied by 105MPN/L, ammonia emission flux 22.01mg/m2/h。
(2) Storing the acidified aquaculture wastewater for 30 days, wherein the pH value of the acidified aquaculture wastewater is 8.35 and the discharge flux of ammonia gas is 18.66mg/m during the storage for 30 days2/h；
(3) Firstly, cleaning solid dung in a breeding house by adopting a dry dung cleaning mode, then leading dung water after being acidified and stored for 30 days to pass through a three-stage sedimentation tank and enter a reclaimed water recycling tank, pumping the dung water in the reclaimed water recycling tank to the breeding house through a pipeline pump for washing (the solid content is lower than 2%), and avoiding the recycled dung water from directly washing live pigs and drinking water and diet devices in the washing process; in the washing process, the wall of the breeding house is washed firstly and then the ground is washed according to the principle of firstly washing up and then washing down, and the washed liquid dung flows back to the acidification adjusting tank completely. After the washing is finished, the breeding house can be washed again by a little clear water so as to reduce a little pungent smell generated by the recycled liquid dung.
After the step (2) of this example, the ammonia gas emission amount and faecal coliform number of the culture wastewater after the acidification storage were compared with those of culture wastewater which was not acidified but stored for the same time, and the ammonia gas emission flux of the culture wastewater which was not acidified was 33.15mg/m2And the number of faecal coliform groups in the acidified breeding wastewater is 940MPN/L, so that the ammonia emission amount and the faecal coliform group number of the acidified and stored breeding wastewater are obviously reduced, and the related requirements of harmless treatment of livestock and poultry manure are met.
Example 2
In this embodiment, the recycling of the breeding wastewater in the dairy farm is taken as an example to explain the method for washing the breeding house with the breeding wastewater.
The method comprises the following steps:
(1) 1m is3Introducing the culture wastewater generated by the dry manure cleaning mode into an acidification adjusting tank, slowly adding 6.0L of concentrated sulfuric acid diluent, continuously stirring, adjusting the pH value of the wastewater to 5.5, and adjusting the discharge flux of ammonia gas to 7.58mg/m2The livestock and poultry breeding wastewater is derived from the piggery wastewater of the dry manure cleaning process, the solid-liquid separation is not carried out, the pH is 8.5, the number of manure coliform groups is 4.9 multiplied by 105MPN/L, ammonia emission flux 19.96mg/m2/h。
(2) Storing the acidified aquaculture wastewater for 30 days, wherein the pH value of the acidified aquaculture wastewater is 7.85 and the discharge flux of ammonia gas is 16.78mg/m during the storage for 30 days2/h；
Step (3) was the same as in example 1.
After the step (2) of this example, the ammonia gas emission amount and faecal coliform number of the culture wastewater after the acidification storage were compared with those of culture wastewater which was not acidified but stored for the same time, and the ammonia gas emission flux of the culture wastewater which was not acidified was 35.22mg/m2And the number of faecal coliform groups in the acidified breeding wastewater is 870MPN/L, so that the ammonia emission amount and the faecal coliform group number of the acidified and stored breeding wastewater are obviously reduced, and the related requirements of harmless treatment of livestock and poultry manure are met.
Example 3
In this embodiment, the recycling of the breeding wastewater in the dairy farm is taken as an example to explain the method for washing the breeding house with the breeding wastewater.
The method comprises the following steps:
(1) 1m is3Introducing the culture wastewater generated by the dry manure cleaning mode into an acidification adjusting tank, slowly adding 5.5L of concentrated sulfuric acid diluent, continuously stirring, adjusting the pH value of the wastewater to 6.5, and then adjusting the discharge flux of ammonia gas to 8.32mg/m2The livestock and poultry breeding wastewater is derived from piggery wastewater by a dry manure cleaning process, is not subjected to solid-liquid separation, has the pH of 7.69 and the number of manure coliform groups of 5.2 multiplied by 105MPN/L, ammonia emission flux 25.3mg/m2/h。
(2) Storing the acidified aquaculture wastewater for 30 days, wherein the pH value of the acidified aquaculture wastewater is 7.55 and the discharge flux of ammonia gas is 19.66mg/m during the storage for 30 days2/h；
Step (3) was the same as in example 1.
After the step (2) of this example, the ammonia gas emission amount and faecal coliform number of the culture wastewater after the acidification storage were compared with those of culture wastewater which was not acidified but stored for the same time, and the ammonia gas emission flux of the culture wastewater which was not acidified was 40.11mg/m2And the number of faecal coliform groups in the acidified breeding wastewater is 960MPN/L, so that the ammonia emission amount and the faecal coliform group number of the acidified and stored breeding wastewater are obviously reduced, and the related requirements of harmless treatment of livestock and poultry manure are met.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A method for washing breeding houses by using breeding wastewater is characterized by comprising the following steps: the method comprises the following steps:
(1) adding concentrated sulfuric acid into the aquaculture wastewater for acidification, continuously stirring in the adding process, and adjusting the pH value of the aquaculture wastewater to 5.5-6.5;
(2) storing the acidified aquaculture wastewater for at least 30 days;
(3) and washing the breeding house by using the supernatant of the stored breeding wastewater.
2. The method for washing and recycling the breeding houses by the breeding wastewater according to claim 1, which is characterized in that: the volume fraction of the added concentrated sulfuric acid accounts for 1-5 per mill of the aquaculture wastewater.
3. The method for washing and recycling the breeding houses by the breeding wastewater according to claim 1, which is characterized in that: the breeding wastewater comprises dry clear manure and liquid dung of a pig farm, a dairy cow farm or a beef farm, and one or more of liquid parts of water-washed manure and water-soaked manure in a livestock and poultry farm after solid-liquid separation.
4. The method for washing and recycling the breeding houses by the breeding wastewater according to claim 1, which is characterized in that: the original pH value of the aquaculture wastewater is 6.5-8.5, and the solid content is less than 5%.
5. The method for washing and recycling the breeding houses by the breeding wastewater according to claim 1, which is characterized in that: the concentrated sulfuric acid is industrial concentrated sulfuric acid with the mass fraction of 96%, and the adding mode is that the concentrated sulfuric acid is firstly diluted and then is slowly added into the culture wastewater from an acid storage tank by an acid adding pump.
6. The method for washing and recycling the breeding houses by the breeding wastewater according to claim 1, 2, 3, 4 or 5, wherein the method comprises the following steps: in the step (2), when the acidified aquaculture wastewater is stored, the surface of the aquaculture wastewater in the storage pond is uniformly covered with crushed straws, the crushed length of the straws is 5-15 cm, and the covering thickness is 3-6 cm.
7. The method for washing and recycling the breeding houses by the breeding wastewater as claimed in claim 6, wherein the method comprises the following steps: the straw is one or more of dry corn straw, wheat straw or rice straw.
8. The method for washing and recycling the breeding houses by the breeding wastewater as claimed in claim 6, wherein the method comprises the following steps: and (3) enabling the acidified and stored aquaculture wastewater to pass through a three-stage sedimentation tank and then enter a reclaimed water reuse tank to obtain aquaculture wastewater supernatant, and pumping the aquaculture wastewater supernatant in the reclaimed water reuse tank to a aquaculture house through a pipeline pump for flushing.
9. The method for washing and recycling the breeding houses by the breeding wastewater according to claim 8, which is characterized in that: and (4) before the step (3), cleaning solid manure in the breeding house by adopting a dry manure cleaning mode, and pumping the supernatant of the breeding wastewater in the reclaimed water recycling pool to the breeding house for washing through a pipeline.
10. The method for washing and recycling the breeding houses by the breeding wastewater according to claim 9, which is characterized in that: and (4) after the step (3), adopting the supernatant of the aquaculture wastewater to wash the aquaculture house, and then adopting clear water to wash the aquaculture house.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911143129.7A CN110937677A (en) | 2019-11-20 | 2019-11-20 | Method for washing breeding house with breeding wastewater for recycling |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911143129.7A CN110937677A (en) | 2019-11-20 | 2019-11-20 | Method for washing breeding house with breeding wastewater for recycling |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111807606A (en) * | 2020-06-05 | 2020-10-23 | 中国科学院南京土壤研究所 | Method for preventing and controlling ammonia volatilization in fermentation process of cow dung sewage by using modified corncobs |
| CN114212958A (en) * | 2021-12-07 | 2022-03-22 | 深圳亦永生物科技有限公司 | Livestock and poultry breeding water-soaked manure treatment process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106007201A (en) * | 2016-07-05 | 2016-10-12 | 嘉兴悟净环保科技有限公司 | Livestock and poultry breeding wastewater treating technology |
| CN106915867A (en) * | 2015-12-25 | 2017-07-04 | 仁维国际股份有限公司 | The preparation method of breeding wastewater biochemical treatment system and its treatment byproduct and application |
| CN109133516A (en) * | 2018-09-18 | 2019-01-04 | 广西大学 | A kind of breeding wastewater resource utilization utilizes method |
| CN109516839A (en) * | 2018-12-26 | 2019-03-26 | 农业部规划设计研究院 | A kind of method of livestock and poultry cultivation liquid dung acidification storage |
-
2019
- 2019-11-20 CN CN201911143129.7A patent/CN110937677A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106915867A (en) * | 2015-12-25 | 2017-07-04 | 仁维国际股份有限公司 | The preparation method of breeding wastewater biochemical treatment system and its treatment byproduct and application |
| CN106007201A (en) * | 2016-07-05 | 2016-10-12 | 嘉兴悟净环保科技有限公司 | Livestock and poultry breeding wastewater treating technology |
| CN109133516A (en) * | 2018-09-18 | 2019-01-04 | 广西大学 | A kind of breeding wastewater resource utilization utilizes method |
| CN109516839A (en) * | 2018-12-26 | 2019-03-26 | 农业部规划设计研究院 | A kind of method of livestock and poultry cultivation liquid dung acidification storage |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111807606A (en) * | 2020-06-05 | 2020-10-23 | 中国科学院南京土壤研究所 | Method for preventing and controlling ammonia volatilization in fermentation process of cow dung sewage by using modified corncobs |
| CN114212958A (en) * | 2021-12-07 | 2022-03-22 | 深圳亦永生物科技有限公司 | Livestock and poultry breeding water-soaked manure treatment process |
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Application publication date: 20200331 |