Process for Controlling Ammonia Loss

Abstract

A method of offsetting losses of ammonia from a pulping mill comprising cooking a lignocellulosic material in a cooking liquor, wherein cooking in the cooking liquor separates the lignocellulosic material into a pulp, capturing a vapor of the cooking liquor, condensing the vapor of the cooking liquor to yield a spent cooking liquor condensate, washing the pulp in a wash liquid, wherein washing the pulp removes at least a portion of the spent cooking liquor from the pulp, capturing the wash liquid, removing ammonia from the wash liquid to yield a regenerated ammonia, regenerating the cooking liquor from the spent cooking liquor condensate and the regenerated ammonia, combusting a waste material and a concentrated spent cooking liquor, wherein combusting the waste material and the concentrated spent cooking liquor yields a flue gas and heat, transferring the heat from combusting the waste material and the concentrated spent cooking liquor to water to generate steam, removing a sulfur-containing compound from the flue gas, and introducing an effluent stream into an effluent treatment system, wherein introduction of the effluent stream into the effluent system will remove ammonia from the effluent stream.

Dependencies are inferred from the claim text.