The objective of this study was to evaluate the microwave drying characteristics of mixtures of chemical wastewater sludge (70~90%) and anthracite coal (10~30%) with respect to physical and economic factors such as mass, volume reduction, moisture content, drying rate and heating value when the wastes were dried at different weight mixing ratio and for different microwave irradiation time. The drying process were carried out in a microwave oven, the combined drying process with a 2,450 MHz frequency and 1 kW of power. Maximum dry rates per unit area on the microwave drying of mixtures with chemical wastewater sludge and anthracite coal were 35.5 kg H2O/m2·hr for Cs90-Ac10; 40.1 kg H2O/m2·hr for Cs80-Ac20 and 35.0 kg H2O/m2·hr for Cs70-Ac30. The result clearly indicated that moisture can be effectively and inexpensively removed from the wastes through use of the microwave drying process.

1. 서 론
 2. 실험재료 및 방법
  2.1. 실험재료
  2.2. 실험장치 및 방법
 3. 결과 및 고찰
  3.1. 부피 감소율 변화
  3.2. 함수율 변화
  3.3. 건조속도 변화
  3.4. 발열량 분석
 4. 결 론
 REFERENCES

• 이승철(동아대학교 환경공학과, Department of Environmental Engineering, Dong-A University) | Seung-Chul Lee
• 정진희(Department of Environmental Engineering, Dong-A University) | Jin-Hee Jung
• 이준희(Department of Environmental Engineering, Dong-A University) | Jun-Hee Lee Corresponding author