Based on IRRS (Integrated Resource Recycling System) bovine urine processing technology
1、 IRRS system objectives and core concepts
IRRS (Integrated Resource Recycling System) is an open and inclusive system with "reduction, resource utilization, and recycling" as its core. By integrating physical pretreatment, biotransformation, energy recovery, nutrient extraction, and ecological barrier technologies, it constructs a closed-loop system of "cow urine energy fertilizer agricultural and animal husbandry production". Its goals include:
Efficiently recover nutrients such as nitrogen, phosphorus, and potassium from cow urine, and convert them into organic fertilizers, regenerative nutrient solutions, and other agricultural and animal husbandry resources;
Realize energy regeneration (such as biogas, biogas) and reduce energy consumption in aquaculture;
Ensure the standard treatment of wastewater and solid waste to reduce environmental pollution;
Through multi link linkage, improve the resource utilization efficiency and economic ecological benefits of the agricultural and animal husbandry system.
2、 IRRS System Technical Architecture
The IRRS system integrates physical, chemical, and biological treatment technologies, as well as agricultural and pastoral cycle modules, forming a four level architecture of "front-end pretreatment main treatment transformation deep resource recovery end ecological barrier", as follows:
2.1 Front end preprocessing module
Core objective: Remove suspended solids, regulate water quality, and create conditions for subsequent treatment.
Liquid pollution separation system: preliminary solid-liquid separation is carried out through grids and sieves to remove large particle impurities such as coarse fibers and feed residues from cow urine.
2.2 Main Processing Conversion Module
Core objectives: Degradation of organic matter, conversion of nutrients, production of energy and basic resources.
Anaerobic treatment+biogas system:
2.3 Deep Resource Recycling Module
Core objective: To maximize the extraction of high-value resources and achieve the goal of turning waste into treasure.
Production of Nutrients and Regenerated Nutrient Solutions:
The intermediate liquid produced by the membrane oxygen chamber is further purified to produce a regenerated nutrient solution; The separated organic matter is concentrated as a "nutrient base" and used as a substrate for microbial fermentation or algae cultivation.
Waste heat and carbon recovery system:
Recycling the waste heat generated by anaerobic fermentation to maintain the temperature of the membrane oxygen chamber (suitable temperature 25-30 ℃) and reduce energy consumption; Collect high CO ₂ gas generated during the fermentation process for carbon source supplementation in algae cultivation or mushroom cultivation.
Downstream industries:
Using algae farming systems to produce algae biomass, extracting DHA (for nutritional purposes) and chitin; The remaining algal protein is used as "animal feed protein" to supply back to the breeding farm, forming a closed loop of "breeding processing feed".
2.4 End of pipe ecological barrier module
Core objective: Ensure the harmless treatment of final emissions and reduce ecological risks.
Technology integration:
Wetland/pond ecosystem: treating deeply recycled wastewater, further removing residual nitrogen and phosphorus through the synergistic action of aquatic plants (such as reeds) and microorganisms (total nitrogen removal rate of 30% -50%, total phosphorus removal rate of 20% -40%);
Returning mushroom and grass biomass to the field: mixing the solid residue generated during the treatment process (such as waste mushroom bags and plant ash) with organic fertilizer to improve soil structure and enhance soil fertility.
3、 Benefit analysis
Environmental benefits: COD and ammonia nitrogen emissions are reduced by 60% -80% compared to traditional treatments, reducing soil and water pollution; Replacing fossil fuels with biogas reduces carbon emissions by 30% -40%;
Economic benefits: Large scale breeding farms can save energy costs of 100000 to 200000 yuan per thousand cows per year, and organic fertilizer sales revenue of 50000 to 80000 yuan per year; Reduce fertilizer costs by over 50% for small and medium-sized farms;
Ecological benefits: soil organic matter content increased by 10% -15%, water resource reuse rate reached 60% -70%, achieving the coordinated development of "breeding planting ecology".
4、 Application scenarios and promotion suggestions
Large scale aquaculture farm: adopting the core process of "anaerobic+membrane aerobic+energy recovery", supporting algae cultivation and downstream extraction industry, to achieve industrial cycle;
Small and medium-sized farms: prioritize the "microbial fermentation+wetland treatment" mode, reduce equipment investment, and focus on returning organic fertilizer to the field;
Promotion suggestion: Strengthen technical training (such as microbial fermentation operation), policy subsidies (such as grid connected subsidies for biogas power generation), and promote the deep integration of IRRS with the agricultural and animal husbandry industry.
The IRRS system integrates technology and closed-loop resources to transform cow urine from a "pollutant" into diverse resources such as "energy, fertilizer, and feed", providing core technical support for the green and sustainable development of the agriculture and animal husbandry industry.