1、Applying urea ammonium nitrate solution saves nitrogen resources by

Urea and urea ammonium nitrate solution (UAN) were used as N sources, and three N application rates (210, 168 and 0 kg N ha −1) and two fertilization methods (micro sprinkling fertigation and traditional fertilization) were set as the three key components.

2、Direct synthesis of urea from carbon dioxide and ammonia

Urea is an essential fertilizer needed to meet the global demand for food. Currently, its production rate by reaction of carbon dioxide with ammonia is slow and the energy demand is high.

3、Urea application in soil: processes, losses, and alternatives—a review

Urea is the most used fertilizer because of its significance on world food security but it is also the toughest fertilizer to manage. It is readily available to the plant and it is vulnerable to loss in various ways, causing environmental pollution and huge economic losses.

4、The Effect of Different Soil and Moisture on Nitrogen

To evaluate the effectiveness of stable urea ammonium nitrate solution （YUAN）， which includes urease and nitrification inhibitors each constituting 0.06% of the solution， in summer maize cultivation， both laboratory and field experiments were conducted.

5、The Role of Urea Ammonium Nitrate (UAN) in Modern Fertilization

The use of Urea Ammonium Nitrate (UAN) fertilizer varies significantly depending on the crop type, its nitrogen requirements, growth stages, and the specific soil conditions in which it is applied.

Urea

The manufactured nitrogen (N) fertilizers applied to soils are major sources of N 2 O emissions from agricultural systems. Among the synthetic N fertilizers, urea has the highest nitrogen content of all solid nitrogenous fertilizers and accounts for 66% of global synthetic N fertilizer use.

Decoding urea fertilizer: chemical composition, production process and

Explore the in-depth analysis of urea fertilizer, including its chemical composition, production process, and beneficial applications in agriculture. Discover how high-quality urea and other fertilizers like potassium chloride granules can enhance crop yield and support modern agricultural practices.

What Is Urea Fertilizer and How Does It Work?

Master the use of urea fertilizer. Understand its chemical identity, how it converts nitrogen in soil, and best practices for efficient, loss-free application.

Review: Modified Urea Fertilizers and Their Effects on Improving

This review will also discuss the pros and cons of applying slow- and controlled-release nitrogen, the impact of modified urea compounds on crop productivity, and nitrogen use efficiency (NUE).

Ammonia and Urea Production

AMMONIA AND UREA PRODUCTION Urea (NH2CONH2) is of great importance to the agriculture industry as a nitrogen-rich fertiliser. In Kapuni, Petrochem manufacture ammonia and then convert the majority of it into urea. The remainder is sold for industrial use.

Urea ammonium nitrogen fertilizer is a product manufactured using urea as raw material through bio-fermentation technology. Its production process must meet specific conditions to ensure usability. The following is a detailed analysis:

I. Raw Material Preparation

1. Urea Selection: The primary raw material for producing urea ammonium nitrogen fertilizer is urea. High-purity, low-impurity urea is required. Common brands like Henan Tianguan and Shandong Luxi are preferred due to their high purity.
2. Moisture Control: Urea absorbs moisture during production, so it must be dried to reduce moisture content to below 5% to ensure smooth manufacturing.
3. Temperature and Pressure Regulation: During urea synthesis, reactor temperature and pressure must be controlled. Typically, temperatures of 70–80°C and pressures of 2.5–3.0 MPa are maintained. Deviations affect synthesis efficiency and product quality.

II. Bio-Fermentation Process

1. Microbial Strain Selection: Strains with strong ammonia production and urea decomposition capabilities, such as Escherichia coli or Bacillus subtilis, are used. These thrive in urea solutions and generate ammonia efficiently.
2. Media Formulation: A balanced medium containing carbon sources, nitrogen sources, and microelements optimizes microbial growth and ammonia yield.
3. Fermentation Optimization: Fermentation conditions include temperatures of 30–40°C, pH 7.0–8.0, and adequate oxygen supply to promote ammonia production.

III. Post-Treatment and Purification

1. Precipitation and Separation: After fermentation, unused urea and impurities are removed via pH adjustment or flocculation.
2. Filtration and Washing: Filtered cake is purified through sand filtration or vacuum filtration.
3. Drying and Dehydration: Spray drying or freeze drying reduces moisture content in the filtered cake.
4. Packaging and Storage: Dried fertilizer is sealed in moisture-resistant packaging (e.g., plastic bottles, woven bags) to prevent oxidation.

IV. Safety and Environmental Considerations

1. Emission Treatment: Exhaust gases (e.g., ammonia, hydrogen sulfide) are scrubbed using towers or activated carbon filters to meet environmental standards.
2. Wastewater Management: Wastewater is treated via biochemical or chemical methods to comply with discharge regulations.
3. Waste Disposal: Residual slurry or solids are landfilled, incinerated, or recycled to minimize environmental impact.

V. Economic Analysis

1. Cost Investment: Equipment, raw materials, and energy costs must be calculated to assess project viability.
2. Revenue Forecast: Market demand and pricing strategies determine profitability. Competitive positioning is critical.
3. Return on Investment (ROI): ROI period depends on cost-benefit analysis. Sustainable planning ensures long-term profitability.

VI. Market Promotion and Application

1. Product Positioning: Target high-value markets by emphasizing quality and performance.
2. Sales Channel Development: Leverage e-commerce platforms, distributors, social media, and industry exhibitions to expand reach.
3. Technical Support and Services: Offer customer hotlines, online assistance, and troubleshooting to enhance loyalty and satisfaction.

Producing urea ammonium nitrogen fertilizer requires meticulous attention to raw materials, bio-fermentation, post-treatment, safety protocols, economic feasibility, and market strategies. Addressing these factors ensures successful production and market adoption.