Reliable solutions for commercial success. AAT is not only well known for its background of highly-specialized knowledge and state-of-the-art biogas plants but also for successful operation of these during their entire lifespan. More than 1000 biogas plants built and operating in more than 30 countries verify AAT's success; the result of 30 years of experience and ongoing in-house research and development by highly motivated staff. Low operating, service and maintenance costs coupled with high availability are the main design targets for each individual AAT biogas plant, achieved by focusing on the customer's specific demands and input material requirements and supported by profound know-how and efficient service.