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Results for “SANITARY ENGINEERING”

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At least 109 records · Page 6Linked to original sources
PubMed2000

The U.S. Public Health Service Commissioned Corps: a need for engineers.

In 1798, President John Adams signed the bill creating the Marine Hospital Service to medically care for U.S. merchant seamen. That agency is known today as the U.S. Public Health Service (PHS). In 1918, the PHS Commissioned Corps commissioned sanitary engineers in the Reserve Corps, and in 1930, President Herbert Hoover signed the Parker Act authorizing sanitary engineers to be part of the regular Commissioned Corps. During the world war years, PHS engineers were detailed to improve sanitation for military bases in the United States and abroad. In the 1960s, most PHS engineers served in the Indian Health Service, upgrading sanitation facilities for American Indians and Alaskan Natives. During the 1970s, PHS engineers were involved in providing an integrated and coordinated attack on environmental issues. Today, PHS engineers are involved with many aspects of public health protection and have been detailed around the world to provide emergency assistance in the wake of disasters.

Disaster Planning↗
PubMed2005

Chloride transport in layered soil systems with hydraulic trap effect.

The natural and engineered hydraulic trap systems in sanitary-engineered solid waste landfills were investigated using three layer one dimensional laboratory models. The models consisted of a top reservoir containing a sodium chloride source solution, a compacted upper silt layer as a primary liner, a coarse sand layer as a secondary leachate collection system or a hydraulic control layer, a compacted lower silt layer as a secondary liner, and a bottom water reservoir as a groundwater aquifer. In the first test, the natural hydraulic trap system (upward flow through the lower silt layer) was modeled. In this case, the contaminant transport mechanisms through the upper silt layer were downward advection and diffusion, and through the lower silt layer, diffusion was downward and advection was upward. The results showed that the implementation of the natural hydraulic control system could effectively reduce chloride transport to the bottom reservoir. In the second test, the natural and engineering hydraulic trap systems were simulated (upward flow from the bottom reservoir to the upper reservoir). In the third test, the engineered hydraulic trap system (downward flow through the upper silt layer and upward flow through the lower silt layer) was modeled. The results showed that the natural and engineered hydraulic trap systems have an important effect in reducing chloride migration toward the underlying aquifer. In all experiments the chloride concentrations in the silt and coarse sand layers and top and bottom reservoirs were measured and the observed concentrations were compared with concentrations calculated by a theoretical model. A good agreement was obtained between the observed and theoretical data confirming the acceptable accuracy of the experimental methodologies, observations, and the theoretical model.

Chlorides↗
PubMed1999

[The development of a technology for producing a new disinfecting agent with a universal spectrum of antimicrobial action].

The paper summarizes the findings of the physicochemical and potency of potassium fluoride peroxohydrate (PFP-1), a new Russian disinfecting agent having a universal spectrum of antimicrobial effects. It also summarizes the results of long-term practical use for the routine and final disinfection of rooms, sanitary engineering equipment, glassware, medical instruments against both sanitary indicative microorganisms, and actual pathogens of disease in infective and somatic hospitals, tuberculous dispensaries, sanatoria, schools, kindergartens, military hospitals, maternity houses of Russian different cities, towns, and localities. The paper presents comparative data on the mechanism of action of various modifications of PFP on microbial spores, on the stability of agents and their solutions during storage, on the damaging activity on the materials of the processed objects, on toxicological and ecological risks. The results of comparative studies of the bactericidal and sporicidal activities of the modifications PFP-1, PFP-2, PFP-3 confirmed that it is necessary to develop a procedure for preparing modifications containing high levels of hydrogen peroxide in the dry preparation and that they can be obtained at the pilot unit developed to prepare PFP-1 modifications.

Bacteria↗
PubMed1988

Microbiologic drinking water quality in Israel: standards, monitoring, and treatment.

Drinking water quality depends on standards, monitoring and treatment. Israel's microbiologic water standards are less stringent than those currently recommended internationally, and have focused primarily on bacteriologic levels. Compliance with routine monitoring requirements averaged 86% in 1985-86. However, compliance with retesting of contaminated samples averaged 49% in 1985-86. Compliance with treatment recommendations of district sanitary engineers has also been poor. Poor water quality continues to be a public health problem in Israel, and has contributed to a relatively high incidence of waterborne disease. Current international guidelines recommend filtration and chlorination, particularly for surface water and other contaminated sources. Israel should make this a major public health priority.

Bacteria↗
PubMed2001

Renovation of the WWTP hove.

The provision of reliable treatment has always been a priority in sanitary engineering. However, there is an ever-increasing pressure to meet desirable standards at reduced costs. This paper sets out a methodology to enhance the likelihood of a satisfactory allocation of the resources while providing reliable treatment. The procedure was gradually developed to optimise the massive capital investment of the Flemish Government to comply with the effluent standards set in the EU Directive 271/91. The methodology makes an extended use of dynamic modelling. To facilitate the identification and estimation of the uncertainty, a probabilistic Monte Carlo engine is coupled to the dynamic models. In doing so this approach provides a way of explicitly incorporating uncertainty and variability in the process analysis. The procedure is examined in an upgrade of a conventional WWTP towards stricter effluent norms on nutrients. The results suggest that the procedure can support the decision-making process under uncertainty conditions and enhance the likelihood of meeting effluent standards not entailing above-normal capital investments. The analysis led to reducing the capital investment by 43%, producing savings of more than 1.2 million Euros.

Belgium↗
PubMed1979

[Development of human resources for working in environmental health].

This paper was presented as a reference document in the First Meeting of the PAHO/WHO Textbook Program Committee for the Teaching of Sanitary Engineering and Environmental Sciences, held in Santo Domingo, Dominican Republic, from 24 to 26 November 1977. It analyzes the human resource development process in terms of the basic components: planning, development itself, and utilization. Its principal objectives are: to encourage the performance of studies and research on human resources in environmental health as sources of information for taking decisions, making policy, and drawing up training plans; to suggest ways of improving the quality of education and training services; to encourage the development of suitable techniques and methods for determining human resource needs; and to highlight some recent studies and publications on human resources in relation to environmental problems.

Allied Health Personnel↗