Biogas slurry formula based on pig farm biogas slurry watering forage grass as grass carp feed and preparation method thereof

Abstract

The invention relates to a biogas slurry formula for applying forage grass as a grass carp feed based on pig farm biogas slurry. The biogas slurry formula comprises the following components: a component A: 2-5 parts of pig urine, 4-6 parts of pig manure and 1-3 parts of chicken manure; component B: 7-12 parts of rapeseed cake fertilizer, 5-10 parts of soybean cake fertilizer and 5-9 parts of corn cake fertilizer; component C: 10-14 parts of fermented soybean meal; component D: 2-3 parts of cottonseed meal, 4-6 parts of peanut meal and 1-3 parts of cottonseed meal; the component E comprises the following components in parts by weight: 0.5 to 1.2 parts of lysine, 0.3 to 0.9 part of methionine and 0.2 to 0.6 part of an enzyme preparation; and the component F comprises the following components in parts by weight: 0.5-1 part of antioxidant and 0.5-0.9 part of mildew preventive. According to the preparation method of the biogas slurry formula, pig farm biogas slurry can be combined with the planting industry, waste is turned into wealth, and resource utilization of breeding waste is achieved.

Description

Technical Field

[0001] This invention relates to biogas slurry formulation and preparation method, specifically to biogas slurry formulation and preparation method based on using pig farm biogas slurry to irrigate pasture as grass carp feed. Background Technology

[0002] my country is the world's largest producer and consumer of pork. Based on an estimated 80 to 100 tons of wastewater generated daily by a 10,000-head pig farm, the annual total reaches 250,000 to 320,000 tons. To effectively treat the high concentration of livestock excrement, large-scale pig farms have introduced pollution control projects and technologies such as solid-liquid separation, biogas projects, anaerobic digestion, and AO biochemical systems. However, these technologies face constraints such as high investment costs, high operation and maintenance costs, and unreasonable treatment processes. Furthermore, with the rapid increase in the scale of pig farming, the volume of biogas slurry produced is large and concentrated, leading to the increasingly prominent issue of how to dispose of such a large amount of biogas slurry, and the contradiction between the harmless disposal and safe utilization of biogas slurry. Summary of the Invention

[0003] The purpose of this invention is to provide a biogas slurry formula and preparation method for applying pig farm biogas slurry to pasture as grass carp feed, which can combine pig farm biogas slurry with planting industry, turn waste into treasure, and realize the resource utilization of livestock waste.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A biogas slurry formulation for applying biogas slurry from pig farms to pasture as grass carp feed is characterized by comprising the following components: Component A: 2-5 parts pig urine, 4-6 parts pig manure, 1-3 parts chicken manure; Component B: 7-12 parts rapeseed cake fertilizer, 5-10 parts soybean cake fertilizer, and 5-9 parts corn cake fertilizer; Component C: 10-14 parts of fermented soybean meal Component D: 2-3 parts cottonseed meal, 4-6 parts peanut meal, 1-3 parts cottonseed meal; Component E: Lysine 0.5-1.2 parts, Methionine 0.3-0.9 parts, Enzyme preparation 0.2-0.6 parts; Component F: 0.5-1 part antioxidant, 0.5-0.9 part mildew inhibitor.

[0005] Specifically, it includes the following steps: Step 1: Mix the materials of components A, B, C, and D, add fermentation bacteria, and carry out fermentation; Step 2: Add component E to the mixture from Step 1, stir thoroughly, and allow for further fermentation to separate the solids from the liquid, thus obtaining biogas slurry; Step 3: Filter the biogas slurry, add component F to the initial biogas slurry, and filter it again to remove larger insoluble substances; Step 4: Add sodium hypochlorite to the biogas slurry, stir evenly, and irradiate under ultraviolet light for ten hours.

[0006] Specifically, the fermentation time in step one is more than forty days.

[0007] Specifically, in step three, a 100-mesh sieve is used for filtration.

[0008] Specifically, the antioxidant is di-tert-butylcresol.

[0009] Specifically, the mold agent is sodium benzoate.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: Because biogas slurry contains a large amount of nutrients such as nitrogen, phosphorus, and potassium, as well as trace elements such as iron, zinc, copper, and amino acids, it can be used as an important raw material for replacing organic nutrients and reducing the amount of chemical fertilizers while increasing efficiency. It can be combined with the planting industry to turn waste into treasure and realize the resource utilization of livestock waste.

[0011] Herbaceous plants, as primary producers in ecosystems, are characterized by strong adaptability, rapid growth, high reproductive coefficient, and strong resistance. They are key species for vegetation restoration in degraded ecosystems and have great potential in absorbing biogas slurry from livestock farms and eliminating soil pollution. Herbaceous plants with large biomass and the ability to be planted and promoted on a large scale should be selected. There are many varieties of forage grasses, and their growth is affected by factors such as geographical location and climate. To efficiently cultivate forage grasses and improve their quality, it is particularly important to consider the composition of biogas slurry, select suitable forage grass varieties, and study the agronomic traits, yield, and quality of forage grasses, as well as the relationship between nitrate accumulation and nitrogen metabolism enzymes. This research plays a crucial role in the rational application of biogas slurry to forage grasses, improving forage grass yield and quality, and reducing nitrate accumulation and nitrogen pollution to the environment. Forage grasses are C4 plants, with higher photosynthetic efficiency and yield than crops. Forage grasses are harvested for their stems and leaves, which improves light energy utilization more than harvesting seeds from crops. Forage grasses have strong regenerative ability, can be harvested multiple times a year, and can be sown in spring, summer, and autumn. They are rich in various trace elements and vitamins. Forage grasses are highly tolerant of fertilizer, drought, and flooding, making them an excellent choice for irrigating livestock wastewater. While treating wastewater, the harvested forage grasses can also be used as aquatic feed, reducing livestock costs and improving economic benefits. Detailed Implementation

[0012] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0013] The biogas slurry formula for applying pig farm biogas slurry to pasture as grass carp feed includes the following components: Component A: 2-5 parts pig urine, 4-6 parts pig manure, 1-3 parts chicken manure; Component B: 7-12 parts rapeseed cake fertilizer, 5-10 parts soybean cake fertilizer, and 5-9 parts corn cake fertilizer; Component C: 10-14 parts of fermented soybean meal Component D: 2-3 parts cottonseed meal, 4-6 parts peanut meal, 1-3 parts cottonseed meal; Component E: Lysine 0.5-1.2 parts, Methionine 0.3-0.9 parts, Enzyme preparation 0.2-0.6 parts; Component F: 0.5-1 part antioxidant, 0.5-0.9 part mildew inhibitor.

[0014] The method for preparing the biogas slurry formula includes the following steps: Step 1: Mix the materials of components A, B, C, and D, add fermentation bacteria, and carry out fermentation; Step 2: Add component E to the mixture from Step 1, stir thoroughly, and allow for further fermentation to separate the solids from the liquid, thus obtaining biogas slurry; Step 3: Filter the biogas slurry, add component F to the initial biogas slurry, and filter it again to remove larger insoluble substances; Step 4: Add sodium hypochlorite to the biogas slurry, stir evenly, and irradiate under ultraviolet light for ten hours.

[0015] Specifically, the fermentation time in step one is more than forty days.

[0016] Specifically, in step three, a 100-mesh sieve is used for filtration.

[0017] Specifically, the antioxidant is di-tert-butylcresol.

[0018] Specifically, the antifungal agent is sodium benzoate.

[0019] This invention aims to systematically explore the impact of biogas slurry irrigation on forage production and the ecological environment, and to elucidate the biological treatment mechanism that combines the resource utilization of pig manure with forage planting in large-scale pig farms. It focuses on revealing the dynamic changes in soil organic matter and key nutrients such as nitrogen, phosphorus, and potassium under biogas slurry application, assessing its impact on forage biomass, quality, and the accumulation characteristics of nitrates and heavy metals, and screening out cultivation models that can achieve optimal yield and feed value. This provides a theoretical basis and technical support for the sustainable treatment of pig farm manure and the efficient and comprehensive utilization of forage.

[0020] Sub-project: Research on the safe absorption capacity of biogas slurry in farmland based on nitrogen regulation Research objective: To determine the appropriate application rate of biogas slurry in different soil types under different nitrogen levels, and to comprehensively evaluate the impact of biogas slurry application on soil fertility characteristics, pasture growth indicators, and environmental safety.

[0021] Research Content: Through field plot experiments, this study systematically analyzes the effects of different nitrogen levels of biogas slurry treatment on forage yield, quality indicators (nitrate and crude protein content), and nitrate nitrogen distribution in soil profiles. It investigates the effects of different biogas slurry application rates on soil ammonium nitrogen and nitrate nitrogen content, as well as the activities of urease, protease, glutaminase, and asparaginase, assessing the efficiency of grassland nitrogen utilization from biogas slurry. Furthermore, it explores the dynamic changes in soil soluble inorganic nitrogen, soluble organic nitrogen, and soluble organic carbon under different concentrations of biogas slurry application, and the response characteristics of bacterial, fungal, and nitrogen-fixing bacterial community structure diversity. Based on this, it evaluates the potential environmental risks of biogas slurry application to soil and groundwater ecosystems, and ultimately establishes technical specifications for the safe application of biogas slurry, providing a scientific basis for the resource-based recycling of biogas slurry.

[0022] Key technical issues to be addressed: Intelligent and precise application and safety monitoring technology for biogas slurry. Based on nutrient balance analysis, and taking into account factors such as forage crop type, target yield, soil background nutrient status, biogas slurry nutrient composition, fertilizer utilization efficiency, and forage nutrient absorption patterns, a smart fertigation technology system for biogas slurry based on nutrient balance is constructed. A real-time safety monitoring system for soil moisture and nitrate nitrogen profile distribution is developed to achieve a safe, efficient, and continuous recycling model centered on precise biogas slurry return to the field.

[0023] The technical effects of this invention are as follows: Because biogas slurry contains a large amount of nutrients such as nitrogen, phosphorus, and potassium, as well as trace elements such as iron, zinc, copper, and amino acids, it can be used as an important raw material for replacing organic nutrients and reducing the amount of chemical fertilizers while increasing efficiency. It can be combined with the planting industry to turn waste into treasure and realize the resource utilization of livestock waste.

[0024] Herbaceous plants, as primary producers in ecosystems, are characterized by strong adaptability, rapid growth, high reproductive coefficient, and strong resistance. They are key species for vegetation restoration in degraded ecosystems and have great potential in absorbing biogas slurry from livestock farms and eliminating soil pollution. Herbaceous plants with large biomass and the ability to be planted and promoted on a large scale should be selected. There are many varieties of forage grasses, and their growth is affected by factors such as geographical location and climate. To efficiently cultivate forage grasses and improve their quality, it is particularly important to consider the composition of biogas slurry, select suitable forage grass varieties, and study the agronomic traits, yield, and quality of forage grasses, as well as the relationship between nitrate accumulation and nitrogen metabolism enzymes. This research plays a crucial role in the rational application of biogas slurry to forage grasses, improving forage grass yield and quality, and reducing nitrate accumulation and nitrogen pollution to the environment. Forage grasses are C4 plants, with higher photosynthetic efficiency and yield than crops. Forage grasses are harvested for their stems and leaves, which improves light energy utilization more than harvesting seeds from crops. Forage grasses have strong regenerative ability, can be harvested multiple times a year, and can be sown in spring, summer, and autumn. They are rich in various trace elements and vitamins. Forage grasses are highly tolerant of fertilizer, drought, and flooding, making them an excellent choice for irrigating livestock wastewater. While treating wastewater, the harvested forage grasses can also be used as aquatic feed, reducing livestock costs and improving economic benefits.

[0025] Ecological circular agriculture is an integrated management approach that organically links crop farming, animal husbandry, fisheries, and processing industries. It utilizes core technologies of biodiversity-diversified microbial technology to create a virtuous cycle of the entire ecological chain across multiple modules of agriculture, forestry, animal husbandry, sideline production, and fisheries. This aims to solve environmental pollution problems, optimize industrial structure, conserve agricultural resources, improve output efficiency, and create a new type of multi-level circular agricultural ecosystem. Building upon the rice-fish integrated farming model, a deeper level of agricultural farming is being developed. This model uses biogas as a link and food chain technology to connect animal husbandry, crop cultivation, and processing industries, achieving multi-level energy utilization and a virtuous cycle of materials within the agricultural system, thus achieving high quality and high efficiency. The main models include several "three-in-one" models such as "livestock-biogas-grain," "pig-biogas-vegetable," "cattle-biogas-orchard," and "pig-biogas-tea."

[0026] The integrated crop-livestock circular agriculture model is a new type of circular production model in agricultural development. It rationally combines crop planting with livestock breeding, which can effectively reduce costs and increase economic benefits. Due to its advantages of zero pollution, zero emissions, and low cost, the integrated crop-livestock circular agriculture model has been promoted and applied to a certain extent, achieving some development results. However, problems still exist, such as insufficient coordination between crop planting and breeding, poor stability of crop and breeding technologies, low efficiency, and significant lack of equipment integration.

[0027] Therefore, focusing on the group's main pig farming industry, a pig-biogas-grass-fish agricultural circular industry model is being constructed in intensive pig farming areas. Through the virtuous cycle of internal materials, the pig farming industry is being transformed from a resource-consuming type to a resource-saving and environmentally friendly type, following the path of circular economy and achieving coordinated development of pig production and resources and environment.

[0028] The development of circular agriculture is also a green farming model for the pig farming industry. Currently, waste is directly discharged into the environment at the end of the farming system, causing significant damage to the surrounding environment, leading to water pollution, substandard air quality, and the proliferation of pests and diseases, severely impacting human health and lives. Furthermore, it wastes the organic energy contained in the waste, reducing the resource utilization efficiency and level of resource utilization in the entire agricultural system. The application of circular agriculture in the pig farming industry is of great significance for promoting high-quality development of the industry, alleviating environmental pressure, reducing resource waste, and protecting regional ecological balance.

[0029] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. Pig farm biogas slurry formula for biogas slurry irrigation of pasture grass as grass carp feed, characterized by, Includes the following components: Component A: 2-5 parts pig urine, 4-6 parts pig manure, 1-3 parts chicken manure; Component B: 7-12 parts rapeseed cake fertilizer, 5-10 parts soybean cake fertilizer, and 5-9 parts corn cake fertilizer; Component C: 10-14 parts of fermented soybean meal Component D: 2-3 parts cottonseed meal, 4-6 parts peanut meal, 1-3 parts cottonseed meal; Component E: Lysine 0.5-1.2 parts, Methionine 0.3-0.9 parts, Enzyme preparation 0.2-0.6 parts; Component F: 0.5-1 part antioxidant, 0.5-0.9 part mildew inhibitor.

2. The method for preparing the biogas slurry formula as described in claim 1, characterized in that, Includes the following steps: Step 1: Mix the materials of components A, B, C, and D, add fermentation bacteria, and carry out fermentation; Step 2: Add component E to the mixture from Step 1, stir thoroughly, and allow for further fermentation to separate the solids from the liquid, thus obtaining biogas slurry; Step 3: Filter the biogas slurry, add component F to the initial biogas slurry, and filter it again to remove larger insoluble substances; Step 4: Add sodium hypochlorite to the biogas slurry, stir evenly, and irradiate under ultraviolet light for ten hours.

3. The method for preparing the biogas slurry formula as described in claim 2, characterized in that, The fermentation time in step one is more than forty days.

4. The method of claim 2, wherein the biogas slurry formulation is prepared by mixing the biogas slurry with the additive in a ratio of 1:0.1 to 1:0.5 (w / w). In step three, a 100-mesh sieve is used for filtration.

5. The method of claim 1, wherein the biogas slurry formulation is prepared by mixing the biogas slurry with the at least one additive. The antioxidant is di-tert-butylcresol.

6. The method of claim 1, wherein the biogum formulation is prepared by mixing the biogum and the water in a ratio of 1:1 to 1:

3. The antifungal agent is sodium benzoate. ​