Analysis and Recovery of Sludge from the Waste Water Filtering Station of Galaţi for Use in Agriculture

Abstract

The paper presents a study on the use of sludge from sewage treatment plants for the purpose of using it in agriculture. The use of biosolids in agriculture is considered the most sustainable option of sewage-sludge management. The purpose of the use of sludge in agriculture is the recovery of content of nutrients and organic matter to mud, thus improving the fertility of the land and reducing farmers’ dependence on chemical fertilizers. Due to this, damaging effects on soil, water, vegetation, animals and humans, pollutants can be reduced by using mud.
The application of sewage-sludge on agricultural land is generally the most economical solution, though, because it is seasonal and it represents an opportunity for recycling nutrients, organic matter, and plants for agricultural crops. The nitrogen and potassium contained in mud supplements consistently the demand for fertilizers. Soil fertility can also increase by improving the physical properties of the soil, through the application and incorporation of organic matter contained in the mud.