what is a Liquid Fertilizer Production Line？

what is a Liquid Fertilizer Production Line？

Core Definitions & Functional Orientation

1. Key Definition

2. Core Objectives

• Convert low-value raw materials (e.g., livestock manure, food waste, industrial by-products) into high-value liquid fertilizers through resource recycling.
• Produce fertilizers with fast nutrient release, high absorption rates, and customizable formulas (NPK ratios, trace elements) to meet crop-specific needs.
• Achieve large-scale, low-cost production while complying with environmental standards (e.g., no waste water/odor pollution).

Main Components & Process Flow

1. Core Equipment Modules

2. Typical Production Process

(1) Organic Liquid Fertilizer Process (e.g., from Livestock Manure)

1. Raw Material Preparation: Collect livestock manure (chicken, cow, pig manure) and mix with auxiliary materials (straw, molasses) to adjust C/N ratio (25-30:1) and moisture content (60-70%).
2. Pretreatment: Crush and screen the mixture to remove impurities; homogenize to ensure uniform fermentation.
3. Fermentation: Inject the mixture into sealed fermentation tanks, add microbial agents (e.g., bacillus, yeast), and control temperature (55-65℃) and aeration. Ferment for 7-15 days to decompose organic matter into soluble nutrients (amino acids, humic acid).
4. Filtration: Separate liquid and solid phases via pressure filtration; purify the liquid through ultrafiltration to remove residues.
5. Blending: Adjust pH (5.5-7.5) and nutrient ratios (add N/P/K or trace elements like Zn, Fe) according to product specifications.
6. Filling & Storage: Fill the finished liquid fertilizer into packaging containers; store in corrosion-resistant tanks (stainless steel or HDPE).

(2) Inorganic Water-Soluble Fertilizer Process (e.g., NPK Liquid Fertilizer)

1. Raw Material Dissolving: Add inorganic salts (urea, ammonium phosphate, potassium chloride) into heated dissolvers (60-80℃) and stir to dissolve completely.
2. Impurity Removal: Filter the solution through precision sieves to remove insoluble particles.
3. Nutrient Blending: Adjust the concentration of N, P, K, and trace elements to meet target ratios (e.g., 20-20-20 for balanced fertilizer).
4. pH Adjustment: Use acids (sulfuric acid) or alkalis (potassium hydroxide) to adjust pH to 5.5-7.0, ensuring compatibility with crops and irrigation systems.
5. Filling & Quality Inspection: Fill and seal the product; test nutrient content, solubility, and heavy metal residues (compliant with standards like GB/T 17419-2018).

Key Types & Application Scenarios

1. Classification by Raw Material

2. Application Scenarios

• Large-Scale Agriculture: Greenhouses, cash crop plantations (fruits, vegetables, flowers), and grain fields—compatible with drip irrigation, sprinkler irrigation, and fertigation systems for efficient application.
• Organic Farming: Organic liquid fertilizers meet organic agricultural standards, suitable for organic vegetable/fruit production.
• Waste Recycling: Livestock farms, food processing plants, and municipal waste treatment centers—converts organic waste into fertilizers, achieving resource reuse and environmental protection.
• Specialized Crops: Customized formulas for high-value crops (e.g., tea, tobacco, medicinal herbs) to optimize nutrient supply and product quality.

Core Advantages & Technical Highlights

1. Production Advantages

• High Efficiency: Continuous automated production, with a daily output ranging from 5-500 tons (scalable via modular design).
• Customizable Formulas: Flexible adjustment of NPK ratios and trace element content to match different crops and growth stages.
• Resource Conservation: Uses liquid raw materials or waste, reducing solid waste generation; lower energy consumption compared to solid fertilizer production.
• Environmental Compliance: Sealed fermentation and filtration systems minimize odor and waste water discharge, meeting environmental regulations.

2. Product Advantages

• Fast Absorption: Liquid form allows direct absorption by crop roots and leaves, with nutrient utilization rate 30-50% higher than solid fertilizers.
• Easy Application: Compatible with modern irrigation systems, saving labor and reducing application costs.
• Soil-Friendly: Organic and bio-liquid fertilizers improve soil aggregation, increase beneficial microbial activity, and mitigate soil salinization.

Key Considerations for Selection & Operation

1. Selection Factors

• Production Scale: Small-scale (daily output 5-50 tons) for small farms/cooperatives; large-scale (50-500 tons/day) for fertilizer manufacturers.
• Raw Material Type: Choose fermentation-focused equipment for organic raw materials; dissolving/blending systems for inorganic raw materials.
• Product Standards: Ensure compliance with local regulations (e.g., GB/T 17419-2018 in China, FDA standards in the US) for nutrient content and safety.
• Equipment Material: Select corrosion-resistant materials (stainless steel 304/316, HDPE) for tanks and pipelines to avoid chemical reactions.

2. Operation & Maintenance Tips

• Raw Material Control: Ensure raw materials are free of toxic substances (e.g., heavy metals, pesticides) to avoid product contamination.
• Process Monitoring: Regularly check fermentation temperature, pH, and nutrient content to ensure product stability.
• Equipment Maintenance: Clean filters and pipelines regularly; inspect pumps and mixers for wear; replace seals to prevent leakage.
• Safety Measures: Equip ventilation systems in fermentation areas; use corrosion-resistant tools and protective gear (gloves, goggles) during operation.

Summary