The invention discloses a novel
sludge brick making technique which comprises the following steps that municipal
sludge is subjected to
dewatering conditioning and desodoration treatment; heavy
metal is controlled; treated
sludge pug, clay and an additive are blended to form a material; the material is fed into a
brute force extrusion mixer to be mixed fully, and is ground and homogenized by
brute force roll
grinding and aged; the aged
brick making pug is fed into an
adobe making workshop to be subjected to compression moulding for
adobe making; the moulded adobes are fed into a
drying room to be dried; and the dried adobes are placed in a back stage of a
tunnel kiln to be sintered. According to the technique, the sludge from a
sewage plant is mixed with the raw clay directly, so that
energy resources consumed due to sludge
drying are saved; targeted improvement measures are put forwards to solve the problems of
sludge dewatering,
odor control, heavy
metal stabilization, etc.; the
quality performance and the strength grade of sludge bricks are improved by methods of optimizing a sludge blending ratio and feeding the additive, etc.; the reduction, harmlessness, reclamation and industrialization
treatment goals on the municipal sludge are realized; and the sludge bricks, serving as a product, have objective
economic benefits.