A combined upflow anaerobic sludge bed and trickling biofilter process for the treatment of swine wastewater. Issue 10 (18th May 2016)

• Record Type: Journal Article
• Authors: Zhao, Bowei; Li, Jiangzheng; Buelna, Gerardo; Dubé, Rino; Le Bihan, Yann
• Is Part Of: Environmental technology. Volume 37:Issue 10(2016)
• Page Start: 1265
• Page End: 1275
• Publication Date: 2016-05-18
• Subjects: Upflow anaerobic sludge blanket (UASB) -- trickling biofilter (TBF) -- combined process -- swine wastewater treatment -- nitrogen removal; Environmental engineering -- Periodicals; Environmental protection -- Periodicals; 628.05
• DOI: 10.1080/09593330.2015.1111426
• Languages: English
• ISSNs: 0959-3330

Abstract

ABSTRACT: A combined upflow anaerobic sludge blanket (UASB)-trickling biofilter (TBF) process was constructed to treat swine wastewater, a typical high-strength organic wastewater with low carbon/nitrogen ratio and ammonia toxicity. The results showed that the UASB-TBF system can remarkably enhance the removal of pollutants in the swine wastewater. At an organic loading rate of 2.29 kg/m 3 d and hydraulic retention time of 48 h in the UASB, the chemical oxygen demand (COD), Suspended Solids and Total Kjeldahl Nitrogen removals of the combined process reached 83.6%, 84.1% and 41.2%, respectively. In the combined system the UASB served as a pretreatment process for COD removal while nitrification and denitrification occurred only in the TBF process. The TBF performed reasonably well at a surface hydraulic load as high as 0.12 m 3 /m 2 d. Since the ratio of influent COD to total mineral nitrogen was less than 3.23, it is reasonable to suggest that the wood chips in TBF can serve as a new carbon source for denitrification.