If you have ever managed a compost yard on a working farm, you will be familiar with the frustrations involved: it takes three months for the compost to mature, leachate runs when it rains and the finished product is inconsistent. A manure composting tank offers a sealed, controlled process that finishes in a week, replacing all of that.
This article explains when a manure composting tank is the right investment and how to evaluate the available options.
Why Open Composting Falls Short on Modern Farms
Open composting has been the norm for decades, but it has serious limitations. The pile is exposed to rain, which alters the moisture content and slows down the activity of microorganisms. The surface loses heat, meaning the pile never reaches a uniform high temperature. The only way to turn the pile is with a front-end loader, adding labour and fuel costs.
The result is inconsistent compost. Some parts of the pile finish while others stay raw. Pathogens, parasites and weed seeds survive in the cold spots. The smell – ammonia, hydrogen sulfide and volatile organics – drifts across the property line. A manure composting tank solves all these issues by moving the process indoors into a sealed vessel where temperature, oxygen and moisture can be controlled.
What Happens Inside a Manure Composting Tank
A manure composting tank provides a controlled environment for aerobic microbial activity. Manure is loaded into the tank and mixed by an internal auger or paddle system before being aerated by forced ventilation. Internal temperature is monitored by sensors, and a control system adjusts the aeration to maintain optimal conditions.
Within 24-48 hours, the temperature inside the tank rises to 55 °C and remains at this level for the required period. This kills faecal coliform, Ascaris eggs and most weed seeds. By days 7-10, the material has converted into a stable organic fertiliser that is safe to handle, bag and apply.
The tank itself is usually made of galvanised or stainless steel and is insulated to retain heat and reduce energy use. Exhaust air passes through a deodorisation system to ensure that no untreated odour leaves the tank.
When a Manure Composting Tank Pays for Itself
Not every farm needs a manure composting tank. For a backyard flock of 50 chickens, for example, it would be excessive. However, for any operation producing more than 5-10 tonnes of manure per day, the economics start to make sense.
The cost of a manure composting tank is offset by:
Labour savings: Open composting requires 3-5 workers for turning and monitoring. A tank only needs one operator to load and unload.
Land savings: A 100-tonne open compost yard takes up a lot of space. A manure composting tank with the same capacity can be installed in a fraction of the space.
Faster cycle: A seven-day cycle versus a 90-day cycle means less manure in inventory, less smell on the farm and faster cash flow if the fertiliser is sold.
For many farms, the manure composting tank pays for itself within two to three years through labour and land savings alone.
Choosing the Right Manure Composting Tank
When comparing manure composting tank options, focus on the following three things:
1、Capacity matching: Select a tank size that can handle your daily manure output, plus an additional 20–30% as a safety margin. Bolong offers tanks ranging from 102 m³ to 280 m³, with parallel configurations available for larger operations.
2、Discharge quality: Ask for third-party test data on the finished fertiliser. Bolong’s manure composting tank produces 52% organic matter, 11.9% total nutrients, is free of faecal coliform and contains heavy metals far below standard limits.
3、Operating simplicity: The manure composting tank should be operable by one person with basic training. Look for automatic control, fault alarms and a control system that does not require specialist support.
Frequently Asked Questions
1、Can a manure composting tank handle wet manure?
Bolong manure composting tank accepts chicken manure at moisture content below 65% directly. Wetter manure can be pretreated with straw or rice husks, or dewatered before loading.
2、Is the finished compost safe to sell?
Yes, provided the manure composting tank has reached and held the required temperature. Bolong’s standard cycle produces compost that meets Chinese organic fertilizer standard NY/T 525, with fecal coliform negative and ascaris eggs not detected.
Stop Fighting the Compost Yard
With open composting, you have to manage the weather, labour, leachate and odour every single day. In contrast, a manure composting tank requires you to load it, run it, and discharge finished fertiliser a week later. This is why farms that switch do not switch back.
