---
title: "In-Vessel Composting and Fermentation Tanks"
description: "Vertical in-vessel fermentation tanks that turn manure, food waste and sludge into organic fertilizer in an enclosed, odor-controlled system. Get a quote."
url: https://www.waste-water-equipment-factory.com/products/composting-equipment/
updated: 2026-11-10
---

# Composting Equipment

Turn organic waste into fertilizer in an enclosed, controlled vessel.

A vertical in-vessel composting tank is an enclosed reactor that converts organic waste such as livestock manure, food waste and biological sludge into stable compost or organic fertilizer. It is used by livestock and poultry farms, food processors, municipalities and fertilizer producers who need faster, odor-controlled composting in a small footprint.

## How it works

Organic waste is mixed with a bulking material to adjust moisture and carbon-to-nitrogen ratio, then loaded into the top of the sealed vertical tank. Inside, a rotating main shaft with stirring arms mixes the material while a blower supplies air through the shaft, keeping conditions aerobic. Microorganisms break down the organic matter and generate heat, raising the temperature into the thermophilic range, typically above 55 degrees Celsius, which helps kill pathogens and weed seeds. Exhaust air is collected for odor treatment. Matured material is discharged from the bottom of the tank for curing, screening or further fertilizer processing.

## Models

- [Hydraulic Compost Fermentation Tank, 8–12 m³/day](https://www.waste-water-equipment-factory.com/products/composting-equipment/hydraulic-compost-fermentation-tank/): This hydraulic compost fermentation tank converts chicken manure and other organic waste into organic fertilizer at 8-12 m3 per day. A PLC-controlled motor, gearbox and hydraulic system turn and mix the material inside a 304 stainless steel/steel vessel. It suits fertilizer producers and livestock farms that need enclosed, mechanized composting.
- [Vertical In-Vessel Composting Fermenter](https://www.waste-water-equipment-factory.com/products/composting-equipment/vertical-composting-fermenter/): This intelligent vertical fermentation tank composts livestock and poultry manure and recycles organic waste into fertilizer. PLC control with engine and motor drive automates the fermentation process in a 304 stainless steel/steel vessel. It is intended for livestock and poultry farms and recycling operators that want automated, space-saving composting.

## How to choose

- **Feedstock type and quantity:** Manure, food waste and sludge differ in moisture, nutrients and contaminants. Size the tank on daily input volume and the required retention time.
- **Moisture and C:N ratio:** Successful composting depends on balanced moisture and carbon-to-nitrogen ratio. Plan for bulking materials or pre-dewatering where feedstock is very wet.
- **Heating and climate:** In cold climates, auxiliary heating and insulation help the process reach and maintain thermophilic temperatures.
- **Odor and exhaust treatment:** Enclosed tanks make odor capture easier. Specify a suitable exhaust treatment, such as a scrubber or biofilter, for the site's sensitivity.
- **Downstream processing:** Consider whether the output will be cured, screened, granulated or bagged, and plan space and equipment accordingly.

## Applications

- Pig, cattle and poultry manure
- Food and kitchen waste
- Municipal and industrial biological sludge
- Agricultural and crop residues
- Slaughterhouse and food processing residues
- Organic fertilizer production

## FAQ

### What is the advantage of in-vessel composting over windrows?

In-vessel composting controls aeration, temperature and odor inside an enclosed tank, so it needs less land and is less affected by weather. Windrows are simpler but require more space and turning.

### What temperature does in-vessel composting reach?

Active composting typically reaches thermophilic temperatures above 55 degrees Celsius. Maintaining this range for several days helps reduce pathogens and weed seeds.

### Can wet materials such as sludge be composted?

Yes, but very wet materials usually need to be dewatered or mixed with dry bulking agents such as straw or sawdust. This keeps moisture in a range that supports aerobic composting.

### Is the output ready to use as fertilizer?

Material leaving the tank is usually cured for a period to stabilize before use. It may then be screened, granulated or blended depending on the intended fertilizer product.

## Contact

- Email: inquiry@waste-water-equipment-factory.com
- WhatsApp / Tel: +86 176 2154 1688
- Quotation form: https://www.waste-water-equipment-factory.com/contact/
- Company: Shanghai Mars Industrial Co., Ltd., Shanghai, China