The Effectiveness of Potassium Permanganate in Oxidizing Hydrogen Sulfide and in Aiding Mechanical Dewatering of Pulp and Paper Industry Sludges

Introduction Odorous compounds have long been a significant problem faced by mills treating their own wastewater. This problem can be compounded when mechanical dewatering equipment is used to process primary and secondary sludges. Plainwell Paper Company, a competitive producer of fine printing and technical specialty papers, is no exception to this rule. Along with the start-up of their new waste water treatment facility, which includes an Arus-Andritz sludge dewatering machine, came an irritating and potentially harmful odor problem. It was determined that the major cause of the odor was hydrogen sulfide

Child Art and Primitive Art: Analogies in Aesthetic Development

Contemporary research in the field of Art Education and Psychology has given widespread but relatively limited cognizance to the phenomenon of a compatible symbolism appearing in the art products of children and that of ancient peoples and primitives. European and American educators and scientists have compiled masses of information concerning the modes of visual communication employed by children at varying stages in the course of maturation. As a universal symbology employed by children at comparable levels of development became clear, an associated occurrence of like symbols in the art work of primitives was noted. The recognition of extrinsic analogies in the visual image formation of individuals so widely disparate, geographically and temporarily, has engendered the speculations of this study. The prime hypothesis is: the basic psychic energy and the process of mentation are identical in the human being whether he existed 10,000 years ago or exists today, on any part of the earth. A further, supporting&nbsp; proposition is that manifestations of this universality are observable in analogies of art forms created by ancient people, primitives, and children. The major theories of specialists in Art Education are compared to those of Gestalt psychologists in relation to the probable quality of mental processes involved in image formation. This comparison is intended to provoke a curiosity that will encourage a search for self-knowledge, and further a belief in the homogeneity of all peoples of the earth. &nbsp;</p