A method of producing synthesis gas (syngas) comprising: (a) receiving raw syngas from a gasification unit, wherein the raw syngas comprises cyanide; (b) introducing at least a portion of the raw syngas and water to a syngas scrubber to produce unshifted syngas; (c) introducing a first portion of the unshifted syngas to a first cooling unit to produce a cooled unshifted syngas and a first aqueous condensate, wherein the first aqueous condensate comprises cyanide in an amount of from 5 parts per million by weight (ppmw) to 200 ppmw; (d) recycling at least a portion of the first aqueous condensate to the syngas scrubber; (e) introducing a second portion of the unshifted syngas to a water gas shift unit to produce a shifted syngas, wherein a molar ratio of hydrogen to carbon monoxide in the shifted syngas is greater than a molar ratio of hydrogen to carbon monoxide in the unshifted syngas, wherein the second portion of the unshifted syngas comprises cyanide, and wherein at least a portion of the cyanide in the second portion of the unshifted syngas is converted to ammonia in the water gas shift unit; (f) introducing at least a portion of the shifted syngas to a second cooling unit to produce a cooled shifted syngas and a second aqueous condensate, wherein the second aqueous condensate comprises cyanide in an amount of less than 2.5 ppmw; (g) contacting at least a portion of the cooled shifted syngas with at least a portion of the cooled unshifted syngas to produce a modified syngas, wherein a molar ratio of hydrogen to carbon monoxide in the modified syngas is greater than a molar ratio of hydrogen to carbon monoxide in the unshifted syngas, and wherein the molar ratio of hydrogen to carbon monoxide in the modified syngas is lower than a molar ratio of hydrogen to carbon monoxide in the shifted syngas, wherein the modified syngas is used for the production of methanol, substitute natural gas, liquid hydrocarbons, or combinations thereof; and (h) introducing at least a portion of the second aqueous condensate to a sour water stripper to produce an acid gas and stripped water, wherein the acid gas comprises hydrogen sulfide, carbon dioxide, and ammonia. (a) receiving raw syngas from a gasification unit, wherein the raw syngas comprises cyanide; (b) introducing at least a portion of the raw syngas and water to a syngas scrubber to produce unshifted syngas; (c) introducing a first portion of the unshifted syngas to a first cooling unit to produce a cooled unshifted syngas and a first aqueous condensate, wherein the first aqueous condensate comprises cyanide in an amount of from 5 parts per million by weight (ppmw) to 200 ppmw; (d) recycling at least a portion of the first aqueous condensate to the syngas scrubber; (e) introducing a second portion of the unshifted syngas to a water gas shift unit to produce a shifted syngas, wherein a molar ratio of hydrogen to carbon monoxide in the shifted syngas is greater than a molar ratio of hydrogen to carbon monoxide in the unshifted syngas, wherein the second portion of the unshifted syngas comprises cyanide, and wherein at least a portion of the cyanide in the second portion of the unshifted syngas is converted to ammonia in the water gas shift unit; (f) introducing at least a portion of the shifted syngas to a second cooling unit to produce a cooled shifted syngas and a second aqueous condensate, wherein the second aqueous condensate comprises cyanide in an amount of less than 2.5 ppmw; (g) contacting at least a portion of the cooled shifted syngas with at least a portion of the cooled unshifted syngas to produce a modified syngas, wherein a molar ratio of hydrogen to carbon monoxide in the modified syngas is greater than a molar ratio of hydrogen to carbon monoxide in the unshifted syngas, and wherein the molar ratio of hydrogen to carbon monoxide in the modified syngas is lower than a molar ratio of hydrogen to carbon monoxide in the shifted syngas, wherein the modified syngas is used for the production of methanol, substitute natural gas, liquid hydrocarbons, or combinations thereof; and (h) introducing at least a portion of the second aqueous condensate to a sour water stripper to produce an acid gas and stripped water, wherein the acid gas comprises hydrogen sulfide, carbon dioxide, and ammonia.