미세기포(MB) 기반 고액분리기술을 적용한 유기성 폐기물 소화폐액 처리 및 바이오가스화 성능 향상 연구

This study examined the application of microbubble (MB) technology to digestate effluent to improve anaerobic digestion performance at both laboratory and pilot scales. The implementation of MB technology increased digestion efficiency from 52% to 65% and raised the maximum methane (CH₄) concentration by up to 10%. Additionally, COD, BOD, and suspended solids (SS) levels in the digestate decreased by 30–60%, while total nitrogen (T-N) and total phosphorus (T-P) were reduced by 25–40%. Sludge production declined by more than 20%, resulting in lower overall treatment costs. These findings suggest that MB-based solid–liquid separation can effectively mitigate the challenges posed by high-strength digestate, improve biogas quality, and serve as a promising technology for developing energy self-sufficient waste-to-energy facilities.