Taiyo Nippon Sanso Gas & Welding started last year to deal on a full scale with “Dry Converter” which reduces the weight of wastes using LPG or town gas as fuel aiming at the reduction of processing costs, and has delivered three converter units until now.

With the recent trend of high efficiency achieved in a hot water dispenser for example, the consumption of LPG per consumer has been on the decrease year after year. So the company was looking for a new application of LPG and has come across Daiso of industrial wastes processing company which manufactures the converter. 　

The converter works to lessen the volume for chargeable treatments as industrial wastes of food residues or medical wastes by means of using LPG for heating. It will surely reduce the processing cost of industrial wastes to introduce the equipment. The applicable wastes for processing include raw garbage, paper diaper, blood-adhered gauze, absorbent cotton and bandage. The processing time and weigh-reduction rate differ depending upon the moisture contents of wastes to process, but it is said to reduce from one fifths to one tenths for six to ten hours.

In the treatment process, objective wastes are thrown into the weight-reducing room and indirect heating is done by heating. With the agitating and drying work, the temperature of the weight-reducing room rises up to 180℃to 200℃. By keeping the temperature for 30 minutes or more, infectious wastes can be safely treated reducing the weight. The process is full-automatic, and the treated wastes are scraped out after they become cool.

As it is not a direct combustion process, there is no emission of dioxin and the odor is negligible thanks to the deodorizing effect brought by the patented heat storage process of the manufacturer. The amount used of LPG is 2 to 3 tons per month in case of a food residue processing plant processing 2 tons per day. The actually delivered were 250 units to users mainly of food plants, hospitals and care service facilities.

How much cost reduction can be expected depends upon the volume of wastes exhausted and the processing prices which are regionally different. However, on the assumption of a hospital discharging 500 thousand liters through the year costing 10 million yen for treatments, the hospital is said to reduce the processing cost down to about 6.4 million yen per year including the running cot for an estimated operation period of 266 days per year.

The company has now in hand three food-related enquiries and 10 enquiries together with some requests for quotation. They say, “As the equipment relates to a sales expansion of LPG, we intend to focus on expansion of sales taking advantage of our nationwide channels and through our co-operative team of distributors and the TNSC group.”