Comparison of bioreactors with different kinds of submerged packed beds for domestic wastewater treatment

Petia Mijaylova Nacheva, G. Moeller Chávez, C. Bustos, M. A.Garzón Zúñiga, Y. Hornelas Orozco

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

18 Scopus citations

Abstract

The performance of aerobic submerged packed bed reactors was studied for the treatment of domestic wastewater using different kinds of packing materials with high specific areas (760-1,200 m2/m3). The tested materials were ceramic spheres, crushed tezontle, grains of high density polyethylene (HDPE), of low density polyethylene (LDPE) and of polypropylene (PP), cubes of polyurethane (PU) and polyethylene tape (SESSIL). The bioreactors were operated in continuous regime, applying organic loads in the range of 0.8-6.0 g COD.m-2.d-1. The obtained specific COD removal rates were very similar in all the reactors when they were operated at organic loads up to 2.0g COD.m-2.d-1, after which differences in effectiveness appeared and the best results were determined in the reactors with SESSIL, LDPE and PU. Very low TSS, O&G and turbidity were obtained in all the effluents. The NH3-N and TN removals were dependant on the dissolved oxygen (DO) concentration and the removals at DO of 5 mg/l were 84-99% and 61-74% respectively. The best removals were determined in the reactors with PU, SESSIL and LDPE. The reactor with tezontle had also a good performance when operated with loads up to 1.0 g TN.m-2.d-1. The best phosphate removals (38-49%) were obtained in the reactors with PU, tezontle, ceramic sheres and SESSIL.

Original languageEnglish
Title of host publicationWater Science and Technology
PublisherIWA Publishing
Pages29-36
Number of pages8
Volume58
Edition1
ISBN (Print)9781843391883
DOIs
StatePublished - 1 Jan 2008
Externally publishedYes

Keywords

  • Aerobic biofilters
  • Submerged bed
  • Wastewater treatment

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