Compost Fertilizer

OFEC provides complete equipment and process solutions for the resource utilization of organic waste through composting. Composting is the process of converting organic waste into stable humus through aerobic microbial fermentation. OFEC offers three types of compost turning equipment to suit different fermentation scenarios, with capacities ranging from small-scale farms to large-scale industrial composting facilities.

Driven by the global expansion of organic farming, policies promoting waste-to-resource initiatives, and rising awareness of soil health, the composting industry is rapidly transitioning from traditional "open-air stockpiling" to "mechanized, standardized, and large-scale" operations. Converting organic waste into stable, harmless compost products not only solves waste disposal challenges but also provides high-quality soil amendment materials for agricultural production.

Industry Overview

Composting is the process of converting organic waste (food scraps, plant residues, animal manure, etc.) into stable humus through aerobic microbial decomposition. During the composting process, raw materials undergo complex biochemical reactions under the action of aerobic microorganisms. Organic matter is broken down and transformed into stable humus, while heat is generated, raising the pile temperature to 55–70°C – effectively eliminating pathogens, parasite eggs, and weed seeds.

Compost products are rich in organic matter, humic acid, and nutrients. They improve soil structure, increase organic matter, boost water and nutrient retention, and stimulate microbial activity – serving as a cornerstone for soil health and sustainable farming.

Typical Process Flow

Industrial compost fertilizer production typically follows this standard process:

Raw Material Collection → Pre-treatment (Crushing/Sorting/Moisture Adjustment) → Composting (Aerobic Fermentation) → Curing & Maturation → Screening → Granulation (Optional) → Drying & Cooling (Optional) → Packaging & Storage

Process Stage Breakdown:

Stage	Core Task	Key Equipment
Raw Material Collection	Collection, storage, and transport of organic waste	Conveying systems, loaders, storage facilities
Pre-treatment	Crushing, sorting, moisture and C/N ratio adjustment, microbial inoculation	Crusher, mixer, batching system
Composting	Aerobic fermentation – maintaining optimal temperature and oxygen supply	Compost turner (hydraulic / wheel-type / groove-type)
Curing & Maturation	Further stabilization of compost product	Curing yard, turning equipment
Screening	Separating finished humus from impurities	Trommel screener
Granulation	Forming powdered compost into uniform pellets (optional)	Drum / disc granulator
Drying & Cooling	Reducing pellet moisture to safe storage levels (optional)	Rotary dryer, cooler
Packaging & Storage	Automatic weighing, bagging, and palletizing	Automatic packaging machine, palletizing system

Stage

Core Task

Key Equipment

Raw Material Collection

Collection, storage, and transport of organic waste

Conveying systems, loaders, storage facilities

Pre‑treatment

Crushing, sorting, moisture and C/N ratio adjustment, microbial inoculation

Crusher, mixer, batching system

Composting

Aerobic fermentation – maintaining optimal temperature and oxygen supply

Compost turner (hydraulic / wheel-type / groove-type)

Curing & Maturation

Further stabilization of compost product

Curing yard, turning equipment

Screening

Separating finished pellets from returns

Trommel screener

Granulation

Forming powder materials into uniform pellets (optional)

Drum / disc granulator

Drying & Cooling

Reducing pellet moisture content to safe storage levels (optional)

Rotary dryer, cooler

Packaging & Storage

Automatic weighing, bagging, and palletizing

Automatic packaging machine, palletizing system

Sources of Compost Raw Materials

Livestock Manure

Pig manure, chicken manure, cow manure, sheep manure, and other farming wastes

Agricultural Straw

Corn straw, wheat straw, rice straw, and other crop residues

Food Waste

Organic waste from households and catering businesses

Municipal Sludge

Biological sludge from municipal wastewater treatment plants

Garden Waste

Fallen leaves, branches, grass clippings, and other green waste

Industrial Organic Waste

Distiller’s grains, sugar filter mud, pharmaceutical residue, fruit pomace, etc.

OFEC Equipment Solutions

OFEC provides complete equipment and process solutions for compost fertilizer production, covering all core processes from raw material handling to finished product packaging.

1. Composting System

Composting is the core stage in organic waste resource utilization, directly determining the maturity and quality of the compost product. OFEC offers three types of compost turning equipment to suit different fermentation scenarios:

Hydraulic Compost Turner

Crawler-type running mechanism – suitable for small to medium-scale composting sites and complex terrain. Working width: 2–2.5 meters, turning depth: 0.8–1.2 meters. Highly maneuverable, capable of moving freely indoors and outdoors – ideal for projects with diverse raw materials and complex site conditions.