A modular system and method for producing urea from bio-mass includes cleaning a bio-mass feedstock to remove substantially all non-organic matter; blending the cleaned bio-mass to obtain a substantially homogeneous blend; pelletizing the blended bio-mass; and gasifying the pellets in a gasifier. The bio-mass feedstock may include bio-mass materials having different processing characteristics. The gasifying step preferably includes pulverizing the pellets to a fine particle size, injecting an organic oil into the input biomass mist when needed, and controlling the feed rate to maintain a substantially constant burn temperature. The resultant syngas stream is cleaned and compressed to a high pressure of about 6,000 to 7,000 psi. The resultant ammonia stream is processed in a bypass recycling loop system at 30% conversion rate at a high pressure of about 6,000 to 7,000 psi.