Customer case:

Developing an energy saving control system for sewage sludge drying equipment with real-time moisture content measurement

Oct 18, 2023

Nippon Steel Engineering, in Japan, wanted to increase the amount of dewatered sludge to the drying plant. They relied on Valmet Dry Solids Measurement at the inlet of the pelletizing, and the Valmet High Solids Measurement at the output of the pelletizing. This resulted in their input moisture to increase 3.3% and the output moisture 1%. At the same time, their fuel usage per moisture input was decreased by 5.5%.

Nippon Steel invests in Valmet DS and Valmet HS

In order to increase the thermal heating efficiency there is a needed for this kind of real time and high performing measurements.

Mr. Oizumi Project Manager, Nippon Steel Engineering Co., Ltd., Japan

Summary

Location	Nippon Steel Engineering, Japan
Customer challenge	Increase the amount of dewatered sludge to the drying plant Reliable solids information of the dewatered dry cake from different plants Real-time customer acceptance level for moisture content of pellets
Solution	Nippon Steel Engineering has developed their processes with the following measurements: Valmet Dry Solids Measurement (Valmet DS) at the inlet of the pelletizing Valmet High Solids Measurement (Valmet HS) at the output of the pelletizing
Results	Decreased fuel consumption in drying plant Even quality for the pelleting process (suppressed moisture fluctuation) Better quality for the end-customers and increased income Better process control for pelletizing: Input moisture was increased 3,3% Output moisture was increased 1% Fuel usage (digestion gas usage) per moisture input decreased 5,5% Accurate follow-up of the end-product quality
Keywords	Wastewater, Asia, Japan, Automation

Wastewater measurements

Valmet offers superior solids measurement solutions for wastewater treatment plants based on many years of experience and know-how. Valmet’s solids sensors provide benefits for all sludge processing stages.

Dry Solids Measurement

Valmet Dry Solids Measurement (Valmet DS) utilizes microwave technology to make a stable and accurate solids measurement for dewatering control in wastewater treatment.

High Solids Measurement

Continuous accurate measurement of over 30% total solids for a wide range of industrial applications utilizes microwave technology to make a continuous and accurate solids measurement.

Developing an energy saving control system for sewage sludge drying equipment with real-time moisture content measurement

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