PRE-TREATMENT OF SEWAGE SLUDGE BY USING IRRADIATION AND DEWATERING AID

Proceedings

PRE-TREATMENT OF SEWAGE SLUDGE BY USING IRRADIATION AND DEWATERING AID

Jae-Kwang Lee, Dae-Hyun Yoo and Myun-Joo Lee
Division of Radiation Application, Korea Atomic Energy Research Institute, Korea
(free)

A study on enhancement of sludge dewaterability and disinfection of the microorganisms in sewage sludge by using electron accelerator were carried out. The moisture content in sludge was reduced by using electron beam irradiation and adding the starfish as a dewatering aid. Moisture content was reduced by 20% (w/w) after irradiation and adding the dewatering aid while decreased by ~7% (w/w) after only irradiated at the dose rate below 10 kGy. The colony forming unit of bacteria and E. coli were reduced over 99% after irradiation at the dose of 1 kGy and Sprotein and S-carbohydrate were largely increased after irradiation, which means that micro-organisms were disrupted and their intracellular materials were released because of the high energy of electron beam.

KEY WORDS Dewaterability, Dewatering Aid, Electron Beam, Sewage Sludge, Starfish

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