Waste water mud is a source of toxicological and epidemiological danger. According to the parameters of acute toxicity, its components belong to substances of III and IV class of hazard. If the requirements for the collection, storage, disposal and transportation of sludge are violated, it can cause pollution of the habitat with persistent chemicals. In other words, the disposal of sewage sludge is essential.

A byproduct of water mud is sludge, which was removing from New York treatment plants since 1938, after which it was transported by barge to the open sea, where it was disposed of. In 1988, the United States Congress created new law, prohibiting the disposal of sewage sludge into the ocean. In response, the DEP has developed a long-term program for the daily processing of 1,200 tons of wet sludge. Eight sludge dewatering facilities have been designed and commissioned in 1992.

In New York, 110 km of sewers were laid in 1850-1855, which discharged wastewater into the waters of the Hudson and East River. In the 1890s, the first three sewage treatment plants were built, which also dumped the results of their work into the surrounding waters.

Sewage disposal from numerous industrial enterprises, that stood along the banks was added to the sewage. As a result, the waters around the New York Port were too dirty and poisonous. In 1991, the dumping of waste into water was prohibited. In order to represent the volume of work, we need to turn to the numbers: daily New York absorbs 4.5 million cubic meters of clean water and produces about 5 million cubic meters of sewage waste (1 cubic meter of water = 1,000 liters = 1 ton). They are cleaned at 14 city stations.

About 8,500 cubic meters of sludge is generated in New York every day. Disposal of waste water mud is a necessary measure to maintain a favorable ecological environment.

Thermal destruction of waste water mud is an environmentally friendly method of disposal – only ash of IV class of hazard remains at the outlet; emissions comply with environmental standards. Reduction of waste volume by 25 times. Ash is a raw material for the production of fertilizers. Ash storage is envisaged for the organization in the future of the production of nitrogen-phosphorus-potassium fertilizers.