求翻译：项目描述：该项目为广业环保集团广东省东西北地区污水处理厂项目（共51个）中的潮汕、揭阳、汕尾片区，共17个污水处理厂，生产工艺为：AAO,CASS工艺。是什么意思？

Project Description: The project is broad industry environmental group in northern Guangdong Province, something sewage treatment plant (of 51) in Chaozhou, Jieyang, Shanwei Area, a total of 17 sewage treatment plants, the production process is: aao, cass process.

正在翻译，请等待...

Project description: This project for the broad industry environmental protection group Guangdong Province thing north the area sewage treatment plant project (altogether 51) the Chaoxian, uncovers, shan the end piece area positive, altogether 17 sewage treatment plants, the production craft is: AAO

Project Description: the item for broad industry group East of Guangdong Province environmental protection sewage treatment plant project in Northwest China (total 51) in the Chaozhou-Shantou, Jieyang, Shanwei, a total of 17 sewage treatment plants, production technology: AAO,CASS process.