General Alum Chemical

General Alum Chemical, See GAC Chemical Co. (US), 229 General Chemical Group, hic.. The, 229 General Directorate for the Eiivkonment - Portugal, 284 General Electric Company, 229... 

General Alum Chemical Corp. (GAC Chemical Corp.)... 

Those minerals which are not from mercury, and those salts which are soluble in water, as alums, chalcanthum (sulphates of iron and copper), common salt, sal petrae, and some substances insoluble in water alone, as orpiment, arsenicum, sulphur and other sulphurous minerals, result from the aqueosity of sulphurs mixed with viscous earths firmly united by a fervent heat, whence they are rendered unctuous and afterward solidified by cold. The medieval chemical philosophers generally do not devote so much attention to the fundamental composition of nonmetallic minerals, and the classification here given by Richardus as to their origin is by no means in accord with others, especi-... 

This chapter applies the techniques of the unit process of coagulation to the treatment of water and wastewater for the removal of colloids that cause turbidity and color. It also discusses prerequisite topics necessary for the understanding of coagulation such as the behavior of colloids, zeta potential, and colloid stability. It then treats the coagulation process, in general, and the unit process of the use of alum and the iron salts, in particular. It also discusses chemical requirements and sludge production. 

The experimental procedures to establish water treatment plant operational practices have not been without problems. A few of these problems were engineering in nature, such as material compatibility, type of pumps, chemical phase (liquid or solid). Feeding fluoride is like feeding other chemicals experience provides insight in determining the best type of equipment. The feed equipment is in general the same equipment used for feeding alum, soda ash, lime, sulfuric acid, or other chemicals. 

Coagulation as a method of bacterial water purification may be very efficient. The material most generally used in producing the flock is either iron sulphate or alum. Many different kinds of mechanisms have been used for adding the chemical to the water in definite amounts so that no excess of chemical will remain after the flock has been formed and has precipitated. 

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