SYSTEM AND METHOD FOR TREATMENT OF BIOMASS CONTAINING WASTEWATER FOR RENEWABLE ENERGY

A method of treating biomass and ammonia-containing wastewater comprises anaerobically digesting the wastewater to produce a digestate, oxidizing dissolved sulfides in the digestate, mixing the digestate to form a mixed liquid, filtering the mixed liquid to produce a first filtrate, removing ammonia from the first filtrate to produce an ammonia-depleted filtrate, removing organic contaminants and divalent ions from the ammonia-depleted filtrate by nanofiltration to produce an organic-containing second retentate and an organic-depleted second filtrate, removing additional organic contaminants from the organic-containing second retentate by a second nanofiltration operation to produce a third filtrate and a third retentate, removing inorganic ionic species from the organic-depleted second filtrate by reverse osmosis to produce a fourth filtrate and a fourth retentate, combining the third filtrate and the fourth retentate, and removing additional inorganic ionic species from the combined third filtrate and fourth retentate by a second reverse osmosis operation.