NOVELTY - Geothermal hot water is made to absorb the non-condensable gas containing concentrated hydrogen sulfide recovered from an adsorption tower (11a,11b), such that pH of geothermal hot water becomes 7 or less. Non-absorbed hydrogen sulfide is induced in the adsorption tower-front during adsorption process, and is mixed with the non-condensable gas. Hence, processed geothermal hot water is obtained.    USE - For processing geothermal hot water.    ADVANTAGE - The novel processing method effectively prevents precipitation of silica into geothermal hot water, and prevents generation of silica scale in flow path. Further, production of silica scale in penetrating layer in underground of injection well is prevented, plugging of the penetrating layer is prevented and life of the injection well is lengthened. The novel method is economical, and prevents re-discharging of hydrogen sulfide into the environment.    DETAILED DESCRIPTION - Non-condensable gas containing carbon dioxide and hydrogen sulfide, as a main component, is supplied at relatively high pressure to the front of an adsorption tower (11a,11b), where hydrogen sulfide selectivity adsorption agent is packed, and remaining gas is discharged from the adsorption tower-back. Hydrogen sulfide induced into the adsorption tower is collected at relatively low pressure, and the remaining gas is purged from the adsorption tower-back to head flow, and volume reduction concentration is carried out at the adsorption tower-front. Geothermal hot water is made to absorb the non-condensable gas containing concentrated hydrogen sulfide, such that pH of geothermal hot water becomes 7 or less. Non-absorbed hydrogen sulfide is induced in the adsorption tower-front during adsorption process, and is mixed with the non-condensable gas. Hence, processed geothermal hot water is obtained.    An INDEPENDENT CLAIM is included for processing apparatus for geothermal hot water.    DESCRIPTION OF DRAWING(S) - The figure shows the above processing apparatus of geothermal hot water.    processing apparatus of geothermal hot water (1)    concentration unit (2)    absorption unit (3)    recovering unit (4)    adsorption towers (11a,11b)