When choosing a pig manure organic fertilizer equipment  for pig manure resource utilization, pig farms should consider the following aspects:

1. Manure Pretreatment: Use a solid-liquid separator to pre-treat the pig manure to reduce its water content, facilitating subsequent processing.

2. Fermentation: Compost the pretreated solid manure. Microorganisms transform the organic matter into stable humus, which can be used as organic fertilizer. Temperature, humidity, and ventilation should be controlled during the fermentation process to ensure effective composting.

3. Organic Fertilizer Production: Dry and pulverize the solid residue after fermentation to facilitate subsequent granulation. Use an organic fertilizer granualtor to convert the pulverized material into granular organic fertilizer and package it for enhanced market competitiveness.

4. Fertilizer Utilization: Suitable for pig farms with sufficient farmland. Solid manure can be processed into organic fertilizer or composted and fermented before returning to the fields. Liquid manure can be used as feedstock for biogas projects or treated and returned to the fields. 5. Environmental Protection and Economic Benefits: Ensure that the treatment process meets environmental requirements and reduces odor and pollutant emissions. Through resource utilization, profits can be generated from organic fertilizer sales and energy recovery, thereby improving the economic benefits of the pig farm.

In summary, when selecting a pig manure organic fertilizer equipment treatment model for manure resource utilization, pig farms should carefully select equipment and technologies for pretreatment, fermentation, production, and treatment based on their scale, conditions, and needs, while also considering environmental and economic benefits to achieve manure reduction, harmlessness, and resource utilization.