In 2022, Ecuador produced approximately 950 thousand pigs from which 4,700 pigs were produced in Napo, an Amazonian Province of Ecuador. Most of the production in Napo comes from low-tech pig farms which generate untreated wastewater causing soil and water pollution. Therefore, to reduce environmental contamination from such low-tech pig farms, ammonium removal from swine wastewater using Arthrospira platensis was investigated. Swine wastewater was collected from a low-tech pig farm near to Universidad Regional Amazónica Ikiam. Then, the wastewater was diluted with distilled water, resulting in the following fractions of raw wastewater: 100% (T1), 75% (T2), 50% (T3), and 25% (T4). After that, in a 1.0L Boeco flask 0.2L of A. platensis in exponential phase (0.57 g L-1, wet weight) plus 0.7L of swine wastewater (100%, 75%, 50%, 25%) were added, each treatment was performed in 3-fold. Subsequently, the flasks were maintained outside the laboratory for 28 days. All the flasks were constantly aerated with field photoperiod (12/12) and field temperature (28.6±2.4 °C). After 28 days, the highest biomass concentration obtained was 2.67±0.002 g L-1 (dry basis) for T4 followed by T2, T1, and T3. This T4 treatment also presented the maximum productivity 0.17±0.9 g L-1 day-1(dry basis) at the 21st day. Additionally, mean ammonium removal was 95.68±0.27% (T1), 94.26±2.13% (T2), 92.42±1.96% (T3), and 87.64±0.87% (T4). Additionally, T4 presented 39.85% TOC and 6.59%TN. Based on these results, it can be concluded that Arthrospira platensis could be used for ammonium removal from swine wastewater, leading to a reduction of the environmental pollution caused by low-tech pig farms in Ecuador’s Amazon region while producing valorizable algal biomass.