CN-120309110-B - System for removing ammonia and hydrogen sulfide in water-soaked excrement sewage

CN120309110BCN 120309110 BCN120309110 BCN 120309110BCN-120309110-B

Abstract

The invention discloses a system for removing ammonia and hydrogen sulfide in water-soaked manure sewage, and relates to the technical field of pig farm sewage deodorization treatment. The system for removing ammonia and hydrogen sulfide in the water-soaked fecal sewage comprises an air-water ratio self-absorption system built above a sewage storage tank, a photosynthetic self-oxygen production system and a double-sided binary deodorization system built in the air-water ratio self-absorption system. The invention develops a system for removing ammonia and hydrogen sulfide in water-soaked fecal sewage, which is based on the characteristics of sewage and the dissolution and emission rules of odor, combines a coating type photocatalyst and a negative oxygen ion deodorization technology, integrates the photosynthetic oxygen production capacity of chlorella, considers the factors of illumination and non-illumination, systematically researches the interaction relationship between the factors, thereby achieving the purposes of rapid removal and deodorization efficiency increase, and has the advantages of low cost of a frame structure built by the system, easy transportation and reusability.

Inventors

LI SHUWEN
DING JIALE
LI KUNPENG
HAN XIANJIE
You Zhenshuai

Assignees

青岛农业大学

Dates

Publication Date: 20260508
Application Date: 20250417

Claims (7)

1. The system for removing ammonia and hydrogen sulfide in the water-soaked fecal sewage is characterized by comprising an air-water ratio self-absorption system, a photosynthetic self-oxygen production system and a double-sided binary deodorization system, wherein the air-water ratio self-absorption system is built above a sewage storage tank; the air-water ratio self-absorption system comprises a first cuboid frame and a white transparent film, wherein the first cuboid frame is built above a storage pool, and the white transparent film is covered on the surface of the first cuboid frame; The height of the first cuboid frame is ensured to ensure that the ratio of the air volume above the water-foam manure sewage in the storage tank to the water-foam manure sewage volume is more than 0.85, and the ratio of the diagonal length of the storage tank to the depth of the water-foam manure sewage is more than 0.65; the photosynthetic self-oxygen generating system comprises a photobioreactor built in an air-water ratio self-absorption system, and a plurality of chlorella floating in the water bubble manure sewage and the water bubble manure sewage filled in the photobioreactor; the photobioreactor comprises a second cuboid frame and a white transparent film covered on the surface of the second cuboid frame, wherein the photobioreactor is connected with the storage tank through a pipeline and a first submersible pump, and the first submersible pump pumps sewage in the storage tank to be supplemented into the photobioreactor; the double-sided binary deodorization system comprises a double-sided binary deodorization curtain suspended in the air-water ratio self-absorption system; The double-sided binary deodorizing curtain has the same length and height as those of the air-water ratio self-absorbing system, and is transparent plastic film with negative oxygen ion coating in the upper part and quantum photocatalyst coating in the lower part.
2. The system for removing ammonia and hydrogen sulfide from the water-soaked manure wastewater according to claim 1, wherein the circulation pump pushes the water-soaked manure wastewater in the photobioreactor to circulate, the fluidity of the circulating flow is 2-3 m/s, the circulating pump is ensured to be started for 1 time every 3 hours, and each time circulates for 0.5h and circulates only in daytime; In the culture process of the chlorella, ammonia nitrogen in the sewage of the photo-bioreactor is less than 50mg/L, ammonia nitrogen concentration dilution is needed if the ammonia nitrogen concentration is higher than 50mg/L, the ratio of sunlight period to dark period is 14:10, and the light-dark ratio of the ratio can ensure that the production efficiency of the chlorella is more than 0.208 g/h.m3.
3. The system for removing ammonia and hydrogen sulfide in the water-soaked fecal sewage according to claim 1, wherein the negative oxygen ion coating contains tourmaline powder and rare earth powder, the spraying amount is more than 0.23L per square, the negative ion release amount of the negative oxygen ion coating is more than 2000 per cm 3 , the spraying amount of the quantum photocatalyst coating is more than 0.015L per square, and the negative ion release amount of the quantum photocatalyst coating is more than 1500 per cm 3 .
4. The system for removing ammonia and hydrogen sulfide from the fecal sewage by soaking in water according to claim 1, wherein the double-sided binary deodorizing curtain is hung on the wide side of the air-water ratio self-absorption system and is parallel to the long side of the air-water ratio self-absorption system, and the length of the double-sided binary deodorizing curtain from the long side of the air-water ratio self-absorption system is one half of the height H of the air-water ratio self-absorption system; When the width of the storage pool is larger than the height H of the air-water ratio self-absorption system, the width of the air-water ratio self-absorption system is larger than the height H, at this time, a double-sided binary deodorizing curtain is additionally arranged at the length of the first double-sided binary deodorizing curtain H, and a single-sided unit deodorizing curtain which is horizontally arranged is additionally arranged on the two double-sided binary deodorizing curtains.
5. The system for removing ammonia and hydrogen sulfide from the fecal sewage by soaking in water according to claim 4, wherein the single-sided unit deodorizing curtain is 10cm from the top of the self-absorption system and has a length of two thirds of the length of the air-water ratio of the long side of the self-absorption system; The quantum photocatalyst is sprayed on the upper surface of the single-sided unit deodorizing curtain, the negative oxygen ion coating is sprayed on the lower surface of the single-sided unit deodorizing curtain, the spraying amount of the quantum photocatalyst is more than 0.015L per square, the negative ion release amount is more than 1500 pieces/cm 3 , the negative oxygen ion coating contains tourmaline powder and rare earth powder, the spraying amount is more than 0.23L per square, and the negative ion release amount is more than 2000 pieces/cm 3 .
6. The system for removing ammonia and hydrogen sulfide from the fecal sewage by soaking in water according to claim 1, wherein the minimum distance between the water level of the storage tank and the ground is 17cm, a second submerged pump is installed below the storage tank near the wall, the lift of the second submerged pump is 20cm higher than the depth of the sewage, the water inlet of the second submerged pump is positioned at the bottom, the water outlet is positioned 20cm from the opposite side wall, the opening is 10cm higher than the water surface and is vertical to the opposite side wall, the sprinkler head is installed at the opening end, the sprinkler head is directly sprayed on the opposite side wall, and water drops are generated by impact to increase the contact area of gas.
7. The system for removing ammonia and hydrogen sulfide from fecal sewage by soaking in water according to claim 6, wherein when the width of the tank body is more than 5m, a second submerged pump is installed every 5m along the width direction of the storage tank, thereby realizing the integral stirring of the sewage tank, and the stirring flow rate is 6h, thereby completing the integral stirring.

Description

System for removing ammonia and hydrogen sulfide in water-soaked excrement sewage Technical Field The invention relates to the technical field of pig farm sewage deodorization treatment, in particular to a system for removing ammonia and hydrogen sulfide in water-soaked manure sewage. Background The water-soaked manure sewage is a typical organic wastewater, and is commonly found in northern pig farms and southern pig farms with facility conditions. Such waste water contains a large amount of organic substances such as fat, protein, carbohydrate, etc., and various microorganisms including odor-source bacteria, spoilage bacteria, etc. Due to its special composition and nature, the water-soaked fecal sewage often produces unpleasant odors during the treatment and discharge process, the main sources of which are the odors of ammonia and hydrogen sulfide, which seriously affect the sanitation and quality of life of the surrounding environment, and may even cause dissatisfaction and objection to the public. Along with the acceleration of the urban process and the change of the agricultural production mode, the generation amount and the discharge amount of the water-soaked manure sewage are in an ascending trend, and the pressure on the environment is increased increasingly. Therefore, the deodorization research of the water-soaked excrement sewage is carried out, the air quality of the surrounding environment is improved, the influence of odor on surrounding residents is reduced, the ecological systems such as water bodies, soil and the like can be protected, and the sustainable development of the ecological environment is promoted. The current deodorization methods for livestock farms include chemical methods, physical methods and biological methods. The chemical method has secondary pollution, the physical method has saturation, the chemical method and the physical method have high cost, the removal efficiency is high, and the biological method has low cost, but the deodorization efficiency has low possibility. Therefore, the inventor considers how to creatively build a system for removing ammonia and hydrogen sulfide in the water-soaked fecal sewage, the system can quickly deodorize, the running cost of the system can be reduced, and the deodorizing device built in the deodorizing process is easy to assemble and carry, which is a technical problem which needs to be solved by the people in the field at present. The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art. Disclosure of Invention Aiming at the technical problems, the embodiment of the invention provides a system for removing ammonia and hydrogen sulfide in water-soaked excrement sewage, which aims to solve the problems in the background technology. The invention provides a system for removing ammonia and hydrogen sulfide in water-soaked manure sewage, which comprises an air-water ratio self-absorption system, a photosynthetic self-oxygen production system and a double-sided binary deodorization system, wherein the air-water ratio self-absorption system is built above a sewage storage tank, and the photosynthetic self-oxygen production system and the double-sided binary deodorization system are built in the air-water ratio self-absorption system. Specifically, the sewage storage tank is mainly used for storing the water-soaked manure sewage, and in the actual use process, the sewage storage tank is mostly of a cement tank structure. Preferably, the air-water ratio self-absorption system comprises a first cuboid frame and a white transparent film, wherein the first cuboid frame is built above a storage pool, and the white transparent film is covered on the surface of the first cuboid frame; the height of the first cuboid frame is guaranteed to be higher than 0.85, and the ratio of the air volume above the water-foam manure sewage in the storage tank to the water-foam manure sewage volume is higher than 0.65. The study shows that the design of the proportion relation can oxidize the hydrogen sulfide released by the surface of the sewage in the closed system in the air-water ratio self-absorption system by oxygen in the air above the sewage and absorb the ammonia by water molecules, so that the effect of rapidly removing the hydrogen sulfide and the ammonia escaping from the surface of the sewage within 6 hours can be maintained; When the proportion is 0.85 and the filling amount of the cement pond is fully utilized, the sewage water level is higher, ammonia and hydrogen sulfide at the bottom can be absorbed and dissolved, and then the self-absorption and rapid removal effects are achieved by combining the removal of ammonia and hydrogen sulfide in the space. However, when the organic substances in the sewag