METAWATER

Global warming-related technology

Decrease of greenhouse gases

The nitrous oxide (N2O) emitted from wastewater sludge incinerators is said to have a greenhouse effect which is as much as 310 times that of CO2, a typical greenhouse gas. Because a high concentration of N2O is generated while incinerating wastewater sludge, reduction of N2O from wastewater sludge incinerators offers a significant advantage in helping to prevent global warming.

Circulation type multi-layer incinerator

METAWATER has started to develop a novel sludge incineration system that can reduce emissions of greenhouse gases.
By combining the circulation furnace with its advantage in addressing load fluctuations and mixed incineration with our original multi-layer incineration technology with a proven performance in its successful commercialization, we are committed to decreasing greenhouse gases and reducing the life cycle cost.

Circulation type multi-layer incinerator

Novel control technology: Circulation-type multi-layer incineration control (model-based estimation control)

In the zone incineration technology used in our commercialized multi-layer incinerator, it was difficult to realize this technology with the conventional approach (PID control) because it was necessary to adjust multiple factors such as auxiliary fuel and primary air simultaneously. With model-based estimation control, it is possible to control multiple factors simultaneously based on estimates of the future status using a plant model for the current furnace conditions (plant status such as temperature, flow rate, etc.). Through this improvement, it has become possible to reduce both fuel cost and greenhouse gas (N2O) at the same time based on multi-layer incineration.

Circulation-type multi-layer incineration control (model-based estimation control)

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