Recycling of sewage sludge as cement raw material in Japan
cement raw material (approximately one million tons on a dewatered sludge basis). Its merit is no initial investment requirement, which boosts this application. However, dewatered sludge is more costly to transport due to a larger volume than incinerator ash. It has potential risk of draining from sludge conveying trucks, as well as bad odors. Therefore, a specific attention should be paid to