The workings of SHARON
Grontmij designed the SHARON (Stable High Ammonia Removal over Nitrite) wastewater treatment plant in New York and is responsible for the start-up. SHARON New York treats 7 million litres of rejection water daily. Rejection water is nitrogen rich residue water that is released from a sewage treatment plant when dewatering the sludge which is treated there. The installation has a capacity of 5000 kg NH4-N (ammonium-nitrogen) a day.

The SHARON process is an integral part of the nitrogen reduction program of New York City. This program is worth EUR 667 million and was designed to make several sewage treatment plants in and around New York more sustainable.

Sustainable New York
New York City is working hard to become a sustainable city in 2030. Steven W. Lawitts, Commissioner of the wastewater plant in New York says: “We’re always looking for new ways to make sewage treatment more sustainable. SHARON helps with this, because the use of energy and treatments are reduced. This is how we attain our goal to be more sustainable.”

Project leader Henk Wim de Mooij of Grontmij says: “Working together on methods that contribute to a better climate is very important. We succeeded in that goal together with the city of New York.”

Compact, sustainable and cost effective
The patented SHARON process (Stable High Ammonia Removal over Nitrite) is a compact, sustainable and cost effective technology for treating nitrogen-rich sewage water. SHARON is a joint development of Grontmij, University of Technology Delft and the former Waterboard ZHEW.