Guidelines for Controlling the Operating Frequency of Manure Storage Tank Mixing Equipment

Daily Operational Frequency Based on Manure Volume and Consistency

The volume of manure accumulated in storage tanks directly influences the required mixing frequency. For small – scale livestock operations with daily manure production of less than 5 cubic meters, running the mixing equipment once every 24 hours is often sufficient. This single – daily operation helps prevent the manure from settling and forming hard layers at the bottom of the tank. For instance, in a small poultry farm with a limited number of birds, the manure produced is relatively less, and a once – a – day mixing can maintain a relatively uniform consistency.

As the volume of manure increases, the operating frequency should be adjusted accordingly. Medium – sized farms generating 5 – 20 cubic meters of manure per day may need to run the mixing equipment twice a day. This ensures that the manure remains well – mixed, facilitating the breakdown of organic matter and preventing the formation of anaerobic zones. In a medium – sized dairy farm, where cows produce a significant amount of manure, two daily mixing sessions can help in evenly distributing nutrients and maintaining a more homogeneous mixture.

Large – scale livestock facilities with daily manure production exceeding 20 cubic meters may require three or more mixing sessions per day. The high volume of manure can quickly settle and stratify if not mixed frequently enough. For example, in a large – scale pig farm, the large amount of manure generated can lead to the formation of thick layers at the bottom of the storage tank if not mixed regularly. Three or more daily mixing operations can keep the manure in a more fluid and well – mixed state, which is beneficial for subsequent treatment processes such as anaerobic digestion.

Impact of Manure Consistency on Frequency

The consistency of the manure also plays a crucial role in determining the operating frequency. Manure with a high water content is generally easier to mix and may require less frequent operation compared to dry or semi – dry manure. Dry manure tends to clump together and settle more quickly, forming hard layers that are difficult to break up. In such cases, more frequent mixing, such as three or four times a day, may be necessary to ensure that the manure remains in a usable and homogeneous state. For example, if the manure contains a large amount of bedding material like straw, which absorbs moisture and makes the manure drier, the mixing equipment may need to run more often to prevent clogging and ensure proper mixing.

Seasonal Variations in Operating Frequency

Seasonal changes can significantly affect the characteristics of manure and, consequently, the operating frequency of the mixing equipment. During the winter months, lower temperatures can cause the manure to freeze or become more viscous. This increased viscosity makes it more difficult for the manure to flow and mix properly. To counteract this, the mixing equipment may need to run more frequently, perhaps increasing from twice a day to three or four times a day in cold climates. The additional mixing helps to break up any frozen chunks and keep the manure in a more fluid state, facilitating its management and treatment.

In contrast, during the summer months, higher temperatures can accelerate the decomposition process of the manure. This can lead to the production of more gases and a change in the manure’s consistency. The manure may become more liquid and have a higher tendency to separate into different layers. To prevent excessive stratification and maintain a uniform mixture, the mixing frequency may need to be adjusted. In some cases, it may be necessary to increase the mixing time per session rather than the number of sessions per day. For example, instead of running the equipment for 10 minutes twice a day, it may be more effective to run it for 15 minutes twice a day during the summer.

Rainfall and Its Effect on Frequency

Rainfall can also impact the operating frequency of the mixing equipment. Heavy rainfall can increase the water content of the manure in open – top storage tanks. This sudden increase in water can dilute the manure and change its consistency. If the manure becomes too watery, it may require less frequent mixing as it is already in a relatively fluid state. However, if the rainfall causes the manure to overflow or creates uneven distribution within the tank, additional mixing may be needed to restore a uniform mixture. On the other hand, in areas with limited rainfall, the manure may remain drier, and the normal operating frequency based on volume and consistency should be maintained.

Equipment – Specific Considerations for Frequency Control

The type and design of the mixing equipment can influence the optimal operating frequency. Some mixing systems, such as submersible mixers, are designed to operate continuously or for extended periods. These types of mixers are often used in large – scale manure storage tanks where continuous mixing is required to prevent settling and maintain a homogeneous mixture. For example, in a large – scale anaerobic digestion plant, submersible mixers may run continuously to ensure that the manure and microbial cultures are well – mixed, promoting efficient digestion.

Other mixing equipment, like paddle mixers mounted on the side of the tank, may be more suitable for intermittent operation. These mixers can be programmed to run at specific intervals throughout the day, depending on the manure characteristics and storage tank size. For instance, a paddle mixer in a medium – sized manure storage tank may be set to run for 15 minutes every 4 hours to maintain a consistent mixture without over – mixing, which could potentially damage the equipment or cause unnecessary energy consumption.

Maintenance and Equipment Condition

The condition of the mixing equipment also affects the operating frequency. Well – maintained equipment with sharp blades or properly functioning impellers can mix the manure more efficiently, potentially allowing for less frequent operation. Regular maintenance, such as cleaning the equipment to remove any manure buildup and checking for worn – out parts, ensures that the mixer operates at its optimal capacity. If the equipment is not properly maintained, it may require more frequent operation to achieve the same level of mixing, or it may not be able to mix the manure effectively at all, leading to problems such as uneven distribution and the formation of hard layers.

Since 1999,Sinomuge(Muge) has been a leading manufacturer of livestock feeding systems in China, we specialize in producing silo and feed transport system, liquid feed intelligent feeding systems, intelligent feeding controllers, precision feeding systerm for sows and other automated pig farming equipment. We have established extensive partnerships with leading livestock groups worldwide, including MuYuan, Zhengbang Group, New Hope Group, and Twins Group,, providing integrated professional solutions from design and R&D to production and installation.Official website address：https://sinomuge.com/