Performance of a Series of Polishing Ponds in the Treatment of Sanitary Sewage

Performance of a Series of Polishing Ponds in the Treatment of Sanitary Sewage

The main objective of this research was to evaluate the functioning of a system of polishing ponds on a pilot scale in the post-treatment of urban sewage discharged from an up-flow anaerobic sludge blanket reactor and followed by a submerged aerated filter. The following variables were analyzed: tra...

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Bibliographic Details
Published in:Ciencia e ingeniería neogranadina Vol. 33; no. 1; pp. 105 - 118
Main Authors: Sales de Magalhães, Adriana Barbosa, Xavier Bastos, Rafael Kopschitz, Sánchez Ortiz, Iván Andrés, De Magalhães, Marcos Alves
Format: Journal Article
Language:English
Published: Bogotá Universidad Militar Nueva Granada 01-07-2023
Editorial Neogranadina
Subjects:
Aeration
Alkalinity
Ammonia
Biochemical oxygen demand
Chemical oxygen demand
Chlorophyll
Cyanobacteria
Dissolved oxygen
Effluents
Nitrogen
Nitrogen compounds
Performance evaluation
Plankton
Polishing
pollutant removal
Ponds
Precipitation
sanitary effluent treatment
Sewage
Sludge
Solid suspensions
stabilization ponds
Taxonomy
Waste stabilization ponds
Water quality
Water treatment
Zooplankton
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Summary:The main objective of this research was to evaluate the functioning of a system of polishing ponds on a pilot scale in the post-treatment of urban sewage discharged from an up-flow anaerobic sludge blanket reactor and followed by a submerged aerated filter. The following variables were analyzed: transparency, temperature, dissolved oxygen (DO), pH, alkalinity, biochemical oxygen demand (BOD), chemical oxygen demand (COD), total Kjeldahl nitrogen (TKN), ammonia (NH3), organic nitrogen, nitrate (N-NO3), total phosphorus (TP), orthophosphate (PO43-), total suspended solids (TSS) and chlorophylla. In addition, the planktonic communities were also identified and quantified. During the study period, the pond system registered the following mean and standard deviation of the removal efficiencies: 32.9±31.7% of BOD, 26.5±33.9% of COD, and 29.0±49.6% of TSS; good performance was observed in the removal of nitrogen compounds, and the following results were obtained: 58.4±28.1%, 87.5±15.4%, 24.4±42.6%, and 9.4±51.8%, respectively for TKN, NH3, organic nitrogen, and N-NO3; and 26.9±25.8 of TP and 34.3±32.7% of PO4 3-. During the research period, the planktonic community was represented by the following classes: Chlorophyceae, Euglenophyceae, Cyanobacteria, Cryptophyceae, Zygnemaphyceae, Chrysophyceae, and Dinophyceae; concurrently, the zooplankton registered low densities and was represented by the Rotiferous, Copepod, and Cladocera groups. The results help us understand  the performance of polishing ponds in treating sanitary effluents.
ISSN:0124-8170
1909-7735
DOI:10.18359/rcin.6636