Mitigation techniques on a pig farm in Aragón

This case study is carried out in a farm of 2,600 heads with an annual production of approximately 17,000 m3 of slurry that will be partially managed in a 190 ha cultivation area linked to the farm itself. The facilities are managed by AGROISAB.

The following techniques will be demonstrated:

1. Reduction of emissions in farm slurry pits with an innovative system for frequent slurry removal. (SEGALES).

An autonomous robot vacuum cleaner will remove the slurry by sweeping the pit surface of the buildings. The equipment will suck the slurry into a portable tank and discharge it into the pipes that connect the buildings to the external storage, carrying out a continuous cleaning. The equipment is guided by an optical system and a remote control program that will allow the device to complete a programmed route covering the entire surface of the pit. This will minimize CH4 and NH3 emissions inside the houses, contributing to animal and human welfare, and increasing the potential recovery of CH4 afterwards.

2. Low technology anaerobic digestion system and covered digestate storage. (ECOBIOGAS).

The raw slurry extracted from the pits will be anaerobically digested in a simple system that will allow the recovery of the biogas produced and its valorization in the farm itself. A heat recovery system and agitation equipment will be installed to carry out the mesophilic anaerobic digestion process. The digestate will be stored in a covered basin to avoid losses of NH3.

3. Fertigation in double cropping systems (AGROISAB+CITA).

The digestate produced on the farm will be used to fertilize 190 ha with a low pressure (<2 bar) sprinkler irrigation system. An injection system will connect the digestate storage lagoon with the irrigation system to perform fertigation fractioning the N application, adjusting the doses and timing application to the crop needs throughout the crop cycle and complying with legal restrictions.