Abstract
Post-treatments are necessary if anaerobic effluents need to be discharged into surface waters, because anaerobic digestion alone is not able to produce effluents that can meet the discharge standards applied in most industrialized countries, particularly for suspended solids, particulate COD, nitrogen, phosphorus and sulphides. This paper has the aim to present some results obtained in the recent years in our laboratory, where different comprehensive processes that include anaerobic digestion have been studied. Discussion will regard: 1) the ANANOX (ANaerobic-ANoxic-OXic) process for the treatment of municipal wastewater; 2) a process studied for the biological removal of C, N and P from piggery wastewater that has a hybrid anaerobic/anoxic reactor as the first treatment step; 3) the use of a Sequencing Batch Reactor for the post-treatment of digested cheese whey mixed with cheese factory cleaning waters.
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Abbreviations
- ABR:
-
Anaerobic Baffled Reactor
- Bv:
-
organic volumetric loading rate (gCOD·L-1·d-1)
- BV:
-
bed volumes
- F/M:
-
food to microorganism ratio or sludge loading rate (gCOD·g.VSS-1·d-1)
- HRT:
-
hydraulic retention time (t)
- JHB:
-
University of Johannesburg nutrient removal process
- p.e.:
-
person equivalent
- Qrd:
-
recycle for denitrification flow rate
- Qrs:
-
sludge recycle flow rate
- SBR:
-
Sequencing Batch Reactor
- TKN:
-
Total Kjeldahl Nitrogen
- VCF:
-
Volumetric Concentration Factor (vol. permeate/vol. retentate)
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Tilche, A., Bortone, G., Garuti, G. et al. Post-treatments of anaerobic effluents. Antonie van Leeuwenhoek 69, 47–59 (1996). https://doi.org/10.1007/BF00641611
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DOI: https://doi.org/10.1007/BF00641611