Ecotoxicity assessment of sludge and leaching test eluates of sludge.

Sludge mainly collected from wastewater treatment plants were subjected to chemical and ecotoxicological characterization to provide a preliminary assessment of their suitability for land application. We examined the leachability and toxicity of organic compounds in several industrial wastes and recovered materials such as dewatered sludge through standard leaching tests. Several toxicity tests were performed under standard laboratory conditions using a freshwater alga, a crustacean, and some terrestrial plants.