Nutrients removal from slaughterhouse wastewater using a sequencing batch reactor
Abstract
Simultaneous removal of organic matter, nitrogen and phosphorus in slaughterhouse wastewater was evaluated using a sequential batch reactor (SBR) at laboratory scale. The study was carried out using wastewater from an abattoir located in the Zulia state, Venezuela. The experiment was conducted using a completely randomized design, a cell retention time of 25 days, an anaerobic-aerobic-anoxic sequence, and two hydraulic retention times of 11 and 15 hours. Parameters were measured at the beginning, during and at the end of each cycle, and those were chemical oxygen demand (COD), biochemical oxygen demand (BOD), total Kjeldahl nitrogen (TKN), ammonia nitrogen (N-NH4+), nitrite (N-NO2-), nitrates (N-NO3-), pH, alkalinity, total phosphorus (TP). The results of the removal of variables were compared using analysis of variance and mean separation by Tukey's test, using the statistical program Statistix 9.0. The two treatments applied to slaughterhouse wastewater in reactor allowed the simultaneous removal of nutrients and organic matter, due to the flexibility of the reactor to suit different operating conditions, obtaining removal of 95 % for COD , 69 % for TN and 29 % for TP.Downloads
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Universidad del Zulia, Universidad Centroccidental Lisandro AlvaradoReferences
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