Since water resources of desert Naein City are very limited, a approach which saves water resources and meanwhile meets the needs of the greenspace for water is to use city’s sewage wastewater. Proper treatment of Naein’s sewage up to the standards required for green space uses may solve some of the problems of green space development of the city. The present paper closely examines available st...

-Water pollution has become one of the most serious problems of today’s civilization. In the last few years considerable amount of research has been done on the potential of aquatic macrophytes for pollutant removal or even as bio-indicators for heavy metals in aquatic ecosystems. Water hyacinth is one of the aquatic plant species successfully used for wastewater treatment. It is very efficient...

INTRODUCTION Surgical barrier facilities are by necessity highly controlled to maintain sterility. Any breach of containment can introduce contaminants which could potentially find their way into the animals being operated on. As such, personnel undergo stringent gowning and entry procedures, quarantines if they visit other animal facilities and various other operating procedures to minimise th...

In a study conducted by the US Geological Survey and the Centers for Disease Control and Prevention, 24 water samples were collected at selected locations within a drinking-water-treatment (DWT) facility and from the two streams that serve the facility to evaluate the potential for wastewater-related organic contaminants to survive a conventional treatment process and persist in potable-water s...

This paper describes the results of an industrial pollution prevention pilot project in Nebraska. The goal of the project is to demonstrate that through proper management and operating practices, that industrial pollution can effectively be reduced significantly. The net effect of this pollution prevention program is to improve the economic worth of the industry by lowering expenditures on poll...

The latest NPDES permit adopted for the Sacramento Regional Wastewater Treatment Plant included a requirement for tertiary treatment, equivalent to the water quality requirements of Title 22, unrestricted use recycled water. Initial cost projections for the required plant upgrades exceeded $2 billion to upgrade the 691 ML/day (181 mgd) facility. To help in the selection process for tertiary tre...

After pollutants from an incineration facility disperse into the air, some people close to the facility may be exposed directly through inhalation or indirectly through consumption of food or water contaminated by deposition of the pollutants from air to soil, vegetation, and water. For metals and other pollutants that are very persistent in the environment, the potential effects may extend wel...

In a study conducted by the US Geological Survey and the Centers for Disease Control and Prevention, 24 water samples were collected at selected locations within a drinking-water-treatment (DWT) facility and from the two streams that serve the facility to evaluate the potential for wastewater-related organic contaminants to survive a conventional treatment process and persist in potable-water s...

We have developed a social optimization model that integrates wastewater treatment cost function and ecosystem damage cost function. The social optimal abatement level of water pollution is determined by finding the tradeoff between pollution control cost and ecosystem damage. The model is applied to data from the Lake Taihu region in China to demonstrate this tradeoff. A wastewater treatment c...