NOVELTY - A gasifier (1) has wet mill (12) which produces slurry (Z) by pulverizing solid fuel (Y) in a sewage sludge (X), and gasifier (14) which gasifies slurry with which the pulverized solid fuel and liquid are mixed.    USE - For gasifying slurry and used in apparatus for electric power generation, apparatus for production of hydrogen, apparatus for manufacture of methanol and apparatus for manufacture of chemical (all claimed) such as dimethyl ether.    ADVANTAGE - The gasifier gasifies solid fuel, at suppressed running cost.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) gasification of slurry, which involves gasifying slurry generated by pulverizing solid fuel and in mixed state with sewage sludge;    (2) electric power generating apparatus, which has the gasifier and electric power generation portion which generates electric power by using the gas generated by the gasifier;    (3) generation of electric power, which involves using gas generated by gasification;    (4) hydrogen production apparatus, which has the gasifier and hydrogen production portion for producing hydrogen by using the gas generated by the gasifier;    (5) production of hydrogen, which involves using the gas generated by gasification;    (6) methanol manufacturing apparatus, which has the gasifier and methanol production portion for producing methanol by using the gas generated by the gasifier;    (7) manufacture of methanol, which involves using the gas generated by gasification;    (8) chemical manufacturing apparatus, which has the gasifier and chemical production portion for producing chemical by using the gas generated by the gasifier; and    (9) manufacture of chemical, which involves using the gas generated by gasification.    DESCRIPTION OF DRAWING(S) - The figure shows the flowchart of outline structure of the gasifier. (Drawing includes non-English language text).    gasifier (1,14)    sewage work (2)    wet mill (12)    gas (G)    sewage sludge (X)    solid fuel (Y)    slurry (Z)