Biological Waste Treatment and Pollution Control

5275948

M E T H O D F O R R E P R O C E S S I N G S C R A P R U B B E R

Gunhil Straube, Eckhardt Straube, Willi Neumann, Helmu Ruckauf, Ralf Forkmann, Marti Loftier, Halle Neustadt, Federal Republic Of Germany assigned to Holzemann Meta- llverarbeitung GmbH

A method for reprocessing scrap rubber, which produces reclaimed rubber from comminuted scrap rubber after devulcanization, in a biotechnology-type of process, by holding the comminuted scrap rubber in a bacterial suspen- sion of chemolithotropic microorganisms with a supply of air, until sulphur as an elementary sul- phur and/or sulfuric acid is separated from the remaining replasticized reclaimed rubber. This biotechnological reprocessing obtains reclaimed rubber and sulphur in a simplified manner which products can be reused.

5277814

P R O C E S S F O R T R E A T I N G O R G A N I C W A S T E S

John D Winter, James E Myers, William Deever assigned to Texaco Inc

A method for aerobically treating water- containing organic wastes is provided. This pro- cess may be conducted in a closed reactor with suitable controls to prevent any adverse environ- mental impact, and involves mixing the wastes

with an inert and non-friable bulking agent com- prising a substantial component having a density less than water in the presence of an active bio- mass. An oxygen-containing gas is passed through the reaction mixture to assist in the removal of excess (free) water from the wastes to form a wetted high solids content reaction mix- ture containing the waste solids mixed in a bed of bulking agent. Effective aerobic reaction condi- tions are employed to convert the wastes to a treated waste.

5277909

M E T H O D F O R R E M O V A L O F G O S S Y P O L F R O M C O T T O N S E E D M E A L BY T H E U S E O F U R E A I N

A B O R A T E C O N T A I N I N G B U F F E R

John H Schmidt, Rand Wells, Jack C Bailey as- signed to The United States of America as represented by the Secretary of Agriculture

Plant material may be treated for the removal of gossypol therefrom to provide a protein-rich product and/or oil relatively free of gossypol. The process includes the steps of: a. grinding the plant material to form a meal, b. adding an amine and a buffer to the meal and mixing to form a slurry and react the gossypol in the plant material with the amine and buffer to form a gos- sypol/amine/buffer complex, c. allowing the slurry to form a crystal layer of the complex ab- ove a layer of the meal having gossypol removed therefrom, d. separating the crystal layer from the layer of meal. The gossypol containing com- plex recovered also possesses insecticidal ac- tivity.

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