Anaerobic treatment is a biological process ideally suited for the pretreatment of high-strength wastewaters that are typical of many industrial facilities. The anaerobic process utilizes naturally-occurring bacteria to break down biodegradable material in an industrial waste stream. Anaerobic treatment uses bacteria to help organic material deteriorate in an oxygen-free environment. The anaerobic process is time-tested and does not require the purchase of special bacteria or nutrients. Because the bacteria are anaerobic they do not require oxygen like the organisms in an aerobic process. Reactors are enclosed or covered to prevent the introduction of air and the release of odors