Yongming Wu

Optimization in the anaerobic digestion fluid of swine wastewater treatment By SBBR with addition of raw wastewater

Anaerobic digestion has been applied in various forms and scales to lessen the organic matter in Swine wastewater, but C/N of the anaerobic digesting fluid is low and biochemistry degradation difference. Treatment of swine wastewater anaerobic digestion fluid By SBBR was studied, finally research indicated: SBBR treated swine wastewater anaerobic digesting fluid directly, COD and NH4+-N removal was unstable and poor, but through adding 30% pig farm raw wastewater to the anaerobic digestion fluid, the pollutant degeneration ability of SBBR could be enhanced effectively, COD removal rate enhanced to 83.7%∼87.95%, NH4+-N removal rate rised to 96.1%∼98.9%, and the TN removal rate also increased to 52.16%∼58.13%.

Notice of Retraction Application study of using IC-SBBR process for livestock wastewater treatment

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.

Notice of Retraction Pilot-scale research on nitrogen removal by sequencing batch biofilm reactor for the pig slurry

A Pilot-scale stduy was conducted to evaluate the biological nitrogen removal performance of pig farm biogas slurry in Self-developed sequencing batch biofilm reactor. Influent and effluent samples were analyzed for COD, NH4--N, NO3--N, NO2--N, PH, dissolved oxygen and temperature. The Pilot-scale experiments data showed the ammonia-nitrogen removal for pig slurry was more than 75% on the conditions of the average C/N ratio 0.91 and DO concentration 2 mg/L. According to the path analysis of the degradation of ammonia, there might be Sharon-Anammox process in the sequencing batch biofilm reactor.