Chlorine-free Solid Fuel Production from Municipal Solid Waste by Hydrothermal Process

Indrawan, Bayu; Prawisudha, Pandji; Yoshikawa, Kunio

doi:10.3775/jie.90.1177

Cited by 18 publications

(20 citation statements)

References 13 publications

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“…After the washing process, the inorganic chlorine content was significantly reduced from 87% to 3%. This result confirmed that the washing process effectively removes inorganic chlorine in the product as explained in the previous work [15]. Figure 6 shows the comparison of chlorine content distribution between Unwashed Product after hydrothermal treatment (in the form of inorganic chlorine and organic chlorine) and Unwashed Product after combustion (in the ash and the exhaust gas) with three different combustion temperatures (500 °C, 700 °C, 900 °C), where the total chlorine content in Raw MSW is taken as 100%.…”

Section: Chlorine Analysissupporting

confidence: 90%

“…The liquid can then be recycled for the next washing process or treated in the waste water treatment process. Since it was necessary to identify the washing parameters which could influence the efficiency of the chlorine-free solid fuel production, a series of experiments were performed to find the optimum ratio of the water and product, the washing time, the washing speed and the washing temperature to remove the inorganic chlorine [15]. Up to 96% of inorganic chlorine could be removed only by one time washing with a water to product ratio of 32:1, a washing temperature of 40 °C, a mixing time of 5 min, and a washing speed of 400 rpm.…”

Section: Hydrothermal Treatment and Washing Processmentioning

confidence: 99%

“…After the hydrothermal treatment however, the organic chlorine in the sample was reduced and converted into inorganic (water soluble) chlorine [13] because of the combination of dehydrochlorination effect and the reaction with the alkaline content in MSW to produce salt [14]. The inorganic chlorine can then be easily removed by a water washing process to reduce the total chlorine content in the products [15].…”

Section: Introductionmentioning

confidence: 99%

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Combustion Characteristics of Chlorine-Free Solid Fuel Produced from Municipal Solid Waste by Hydrothermal Processing

2012

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An experimental study on converting municipal solid waste (MSW) into chlorine-free solid fuel using a combination of hydrothermal processing and water-washing has been performed. After the product was extracted from the reactor, water-washing experiments were then conducted to obtain chlorine-free products with less than 3000 ppm total chlorine content. A series of combustion experiments were then performed for the products before and after the washing process to determine the chlorine content in the exhaust gas and those left in the ash after the combustion process at a certain temperature. A series of thermogravimetric analyses were also conducted to compare the combustion characteristics of the products before and after the washing process. Due to the loss of ash and some volatile matter after washing process, there were increases in the fixed carbon content and the heating value of the product. Considering the possible chlorine emission, the washing process after the hydrothermal treatment should be necessary only if the furnace temperature is more than 800 °C.

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Section: Chlorine Analysissupporting

confidence: 90%

Section: Hydrothermal Treatment and Washing Processmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Combustion Characteristics of Chlorine-Free Solid Fuel Produced from Municipal Solid Waste by Hydrothermal Processing

2012

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“…Hydrochloric acid (HCl) produced in HTL can be neutralized by alkaline bases (e.g., KOH), resulting in inorganic salts (e.g., KCl) that can be removed easily from the solid phase by washing. Results show that up to 96 % of inorganic chlorine can be removed by HTL and one-time washing with a water to product ratio of 1:1 [28].…”

Section: Dechlorinationmentioning

confidence: 99%

A perspective on hydrothermal processing of sewage sludge

Chen

Haque

et al. 2020

Current Opinion in Environmental Science & Health

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The US annually produces 79 million dry tons of liquid organic waste including sewage sludge.Anaerobic digestion can only reduce the sludge volume by 50% in mass, leaving the other half as a growing waste management and hygienic problem. Hydrothermal Processing (HTP), a set of several chemical digestion processes, could be employed to convert sewage sludge into valuable products and minimize potential environmental pollution risks. Specifically, hydrothermal carbonization and hydrothermal liquefaction have been extensively studied to sustainably manage sludge. Two of the main reasons for this are the high upscaleability of HTP for public waste management and that it is estimated that HTP can recover eleven times more energy from waste products than landfilling. An integration of HTP with anaerobic digestion or recycling the soluble organics (in the HTP aqueous products) into the HTP process could lead to a higher overall rate of energy recovery for municipal sewage sludge.

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“…The products have been reported to be utilized as solid fuel [4], fertilizer [5], livestock feed or diesel oil [6]. At higher temperature, the process was also reported to be able to produce chlorinefree solid fuel from plastic waste [7]. Since the process uses water as reaction medium, waste with high moisture content can be directly processed without the need of pre-drying, and the hot water can act as solvent, reactant, and catalyst for the processed materials [8].…”

Section: Introductionmentioning

confidence: 99%

Development of torre-briquetting process to convert mixed MSW into high energy density solid fuel

Prawisudha

Triyono

Rorimpandey

et al. 2018

AIP Conference Proceedings

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Chlorine-free Solid Fuel Production from Municipal Solid Waste by Hydrothermal Process

Cited by 18 publications

References 13 publications

Combustion Characteristics of Chlorine-Free Solid Fuel Produced from Municipal Solid Waste by Hydrothermal Processing

Combustion Characteristics of Chlorine-Free Solid Fuel Produced from Municipal Solid Waste by Hydrothermal Processing

A perspective on hydrothermal processing of sewage sludge

Development of torre-briquetting process to convert mixed MSW into high energy density solid fuel

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