Abstract
Based on the characteristics of high COD, high ammonia and high suspended solids in livestock wastewater, a combined technology consisting of Internal Circulation (IC) anaerobic reactor and Sequencing Batch Biofilm Reactor (SBBR) was carried out. After start-up for 42 days, IC reactor could remove 80%-90% of COD with organic loading rate of 12 kg COD/(m3 day) in treating raw livestock wastewater. In the IC-SBBR process, the removal rates of COD, TN and NH4+-N were 95.7%, 81.1% and 89%, respectively. the integrated system was superior to the direct anaerobic or aerobic process for the treatment of large-scale livestock wastewater, would provide the valuable design and operation for the livestock wastewater treatment plants.
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