Equipment selection for manure treatment in new farms: collect these 7 types of baseline data before making decisions

Why do I always feel uncertain before selecting equipment?

When building a new or expanding an existing livestock farm, many owners find themselves in an awkward position when it comes to selecting manure treatment equipment: equipment vendors come to discuss solutions and immediately ask, “What's your daily manure output? What's the approximate moisture content? What's your budget?” Meanwhile, the owner often only has a vague idea like “a few hundred chickens” or “several truckloads of manure per day.” Without clear data, the solution cannot be accurately determined—either the equipment is undersized and manure accumulates within six months of operation, or it's oversized and the investment is wasted, with the fermentation tank running at half load year-round.

The root cause of this problem is that manure treatment equipment is not a standard product you can simply purchase and put into use—it must be matched to your farming scale, manure removal process, site conditions, and end-product application. Without complete baseline data, any solution is nothing more than a guess. This article focuses on the 7 most critical categories of data for equipment selection, providing you with an actionable collection checklist, explaining for each item why it needs to be collected, how to collect it, and what level of completeness qualifies as adequate.

Category 1: Daily Manure Removal Volume and Removal Process—The Foundation That Determines Equipment Scale

This is the starting point for all calculations. What you need to know is “the actual volume of manure removed daily,” not a theoretical value calculated by multiplying livestock numbers by a coefficient. Manure output varies significantly across different removal processes: manure from pit storage or flush systems is a solid-liquid mixture where solids account for only a portion; manure from dry scraping or belt conveyor systems is essentially pure solid. It is recommended to lay plastic sheeting on the ground to collect and weigh the actual daily manure output, recording data continuously for 3–7 days and taking the average. During this period, also record the number of animals being raised, the age of the flock, and the feed formula to facilitate later conversion of data during unstable periods. In addition to daily output, the frequency of manure removal must also be clarified—once a day or twice a day—as this directly affects the design capacity of the feed buffer storage hopper.

Category 2: Fresh Manure Moisture Content and Bulking Agent Sources—The Fork in the Road for Process Selection

The core of aerobic fermentation is controlling moisture content within an appropriate range. Fresh chicken manure typically has a moisture content between 65% and 75%, but this fluctuates significantly due to drinker leakage and manure removal methods. You need to sample and measure moisture content following these steps: take approximately 500 grams of well-mixed fresh manure sample, dry it in an oven at 105°C to constant weight, and calculate the weight loss ratio; if no oven is available, use the hand-squeeze method for a rough estimate—if the material forms a ball when squeezed, no water seeps between fingers, and it crumbles when dropped, the moisture content is approximately in the 60%–65% range. Additionally, you must confirm in advance the source and cost of bulking agents: rice husks, straw powder, sawdust, and mushroom residue are all viable options, but you need to determine which is cheapest locally, whether the supply is stable, and what the moisture content and carbon-to-nitrogen ratio are. This item directly determines how the bulking agent proportioning system of the fermentation tank is configured and whether operating costs will be high.

Category 3: Site Conditions and Surrounding Sensitive Points—Determining the Feasibility of Equipment Installation

Equipment cannot simply exist on a blueprint—on-site dimensions, access roads, and wind direction all must align. Collect the following information: the available area of the proposed construction site (length, width, height), the distance and wind direction relative to the nearest residential area or village (this determines the configuration level of odor control equipment), whether the access road can accommodate large equipment transport, and whether there are underground pipelines, cables, or geological considerations—vertical fermentation tanks have foundation requirements, while windrow composting requires consideration of ground hardening and drainage. One easily overlooked point is the electrical supply condition: the combined power of the mixing motors, blowers, and odor control systems in aerobic fermentation equipment is substantial. You need to confirm whether the existing transformer capacity is sufficient, and if not, what the process and timeline for capacity expansion would be.

Category 4: Planned End-Use of Finished Fertilizer—The Underlying Factor in Technology Route Selection

Manure treatment is not the endpoint—how the output product will be used in turn influences equipment selection. You need to clarify the following questions: Will the finished product be used on your own farmland/orchard, or sold as commercial organic fertilizer? If sold, is a fertilizer registration certificate required? This determines whether you need simple composting equipment or a complete production line with precise mixing, granulation, and packaging functions. The local cropping structure also needs to be investigated—do surrounding farmers prefer powdered or granular fertilizer, what crops are primarily grown, and what requirements do they have regarding nutrient and salt content. If the goal is simply environmental compliance and volume reduction without pursuing commercialization, the selection priorities are entirely different.

Category 5: Environmental Emission Standards and Odor Control Levels—Clarify the Baseline First

Every aspect of manure treatment facilities—odor emissions, wastewater discharge, and solid waste storage—is subject to corresponding environmental management requirements. You need to visit the local ecological environment authority or agriculture and rural affairs bureau to determine what content is required for the environmental impact assessment registration or report form for construction projects, and what the applicable emission standards are for your area. Special attention should be paid to projects located near sensitive receptors, which may be required to install spray deodorization towers or biofilters. These additional pieces of equipment can have significant budget flexibility and must be understood early in the process.

Category 6: Operation and Maintenance Resources—Determining Automation vs. Cost-Effectiveness

The degree of automation and operational complexity varies greatly across different equipment types. A key question is: does your farm have permanent staff with mechanical and electrical expertise? If staff turnover is high and maintenance skills are insufficient, then more mature automated equipment, despite higher initial investment, will provide more stable and reliable long-term operation. Another question is the unit price of electricity—the energy consumption of aerobic fermentation tanks is mainly concentrated in mixing and aeration. If local electricity rates are high, this cost must be factored into the equipment selection calculation.

Category 7: Investment Budget and Expected Payback Period

Last but equally important, you need to establish a clear range for total investment and determine whether it will be a one-time construction investment or phased investment. In addition to the equipment price itself, you must include civil works foundations, installation and commissioning, odor control accessories, electrical capacity expansion, initial bulking agent costs, and labor costs during the trial operation period. It should be noted here that equipment prices vary considerably across manufacturers, but the lowest quotation should not be the sole criterion. The evaluation should comprehensively consider equipment material thickness, key component brand quality, and after-sales response capability.

Once Data Is Complete, What Are the Next Steps

When you have compiled the 7 categories of data listed above into an electronic information sheet, you can provide complete operating conditions to equipment suppliers and request targeted proposals. During this process, you can compare the suitability of different process routes (vertical aerobic fermentation tanks, windrow composting, trough turning systems, etc.) against the constraints identified above. If conditions are unique—such as exceptionally small or large processing volumes, severe moisture content fluctuations, or extremely constrained sites—more flexible custom design may be required.

The data collection process may be more tedious than anticipated, but it is a critical step in avoiding subsequent rework and operational headaches. If you are unsure whether your farm's data is complete, or if you would like to further match the operating requirements of vertical aerobic fermentation tanks, automatic feeding systems, odor control equipment, and other machinery, you can contact Farm Master directly to obtain the project data information sheet. Based on your raw material type, daily processing volume, moisture content, site conditions, and end-product application, we can help you clearly outline the boundary conditions and confirm which key parameters require further on-site measurement and verification. All equipment process parameters mentioned in this article—such as treatment cycle, temperature range, and energy consumption—may vary depending on project conditions and must be calculated individually based on your actual operating conditions. Please do not directly use empirical values as the final design basis.