Treatment for Digested Piggery Wastewater by Strengthened Water Distribution Mode in CRI System
Аннотация
An engineering project with anaerobically digested piggery wastewater as raw material was processed to analyze and find a new distribution mode for CRI system treating high ammonia wastewater,and so that to solve the problems of water gathering on the surface,nozzle clogging,and difficulty control of distribution uniformity in the system. The results showed that the strengthened water distribution mode had better pollutant removal efficiency for digested piggery wastewater treatment. The NH3-N and COD removal could reach 84. 5% ~ 90. 4% and 89. 5% ~ 91. 4% respectively,which were under condition of NH3-N 250 ~ 350 mg · L- 1,COD 650 ~ 1000 mg·L- 1,and daily treatment scale of 40 tons of raw wastewater. The NH3-N and COD of the effluent are good enough to meet the requirements ofEmission Standards for Livestock and Poultry Breeding Industry( GB 18596-2001).