Methods for removing e.g. odor-causing components from liquid sludge, and, in one embodiment, a process for sludge deodorization which includes pretreating the sludge to gasify certain components, reducing the size of solids in the sludge, feeding the thus treated sludge tea stripping tower and therein removing in a stripping gas undesirable components from a thin film of the sludge on the interior tower wall. Preferably, the treated sludge is dewatered. Products from the tower may be recycled f...

Malodorous phosphorodithioate compounds are deodorized by contacting said compounds with zinc oxide. Representative of the class of compounds deodorized in accordance with this invention is the insecticide malathion.

A composition and process for the purification of fats and oils employing a mixture of fat soluble strong acid, an acidic clay, and a carbohydrate.

A deodorization method which comprises allowing a bad-smelling gas containing (a) hydrogen sulfide and/or a mercaptan, (b) a sulfide and/or a disulfide and (c) ammonia and/or an amine to contact (1) firstly with activated carbon, (2) then with activated carbon or clay mineral having an acid supported thereon, and (3) subsequently with activated carbon in the presence of chlorine or bromine.

A gas containing bad smell substances and a washing solution for deodorization are fed into a wash tower so as to carry out the deodorization by the gas-liquid contact. An aqueous solution of an alkali bromide and an ozone-containing gas are fed into a bubbling vessel to produce in active bromine oxide compound. The solution containing the active bromine oxide compound is added to the washing solution and the bad smell gas is washed with the washing solution in the wash tower. The effect of deod...

Malodorous aliphatic amines are de-odorized by injecting nitrogen gas into the liquid phase while maintaining the liquid temperature at about 30.degree.-100.degree. C.

A large amount of treated gas containing odor components is efficiently deodorized by performing ozone deodorization after water molecule deodorization, and thereafter performing ion deodorization. A composite deodorization system is provided with a first chamber for performing the water molecule deodorization connected with a fermentation system by a gas introduction opening supplied with the treated gas containing odor components from the fermentation system, a second chamber for performing oz...

A process for deodorizing tall oil rosin and tall oil fatty acids and their derivatives by treating same with an ammonium hydroxide solution under conditions of a steam sparge.

This invention is a method for deodorization of excrements which is characterized by cultivating a microorganism of Lactobacillus, said microorganism having the ability to deodorize or reduce the odor of raw excrements or a diluent thereof when cultivated with these materials, and then administering to human beings or animals the living cells of this microorganism as such or in admixture with a feed.

A heating element for deodorization contains a metallic substrate, an enamel layer formed on the surface of the metallic substrate, a catalyst layer comprising at least an active alumina, a platinum group metal and a zeolite and formed on the enamel layer, and an electric resistor; the electric resistor being insulated from the environment; and the metallic substrate, the enamel layer, the catalyst layer and the electric resistor being arranged so that heat generated when electric power is appli...