The performance was studied of a series of 2.2 m deep anaerobic, facultative and maturation ponds, which had an overall retention time of 25 days, and a mean mid-depth temperature of 25°C. The mean percentage removals of BOD, COD, suspended solids and faecal coliforms were 88, 69, 83 and 99.97 respectively; there was only 4 percent reduction of ammonia and 6 percent of total phosphorus. The results are compared with those previously reported for a similar series of 1 – 1.2 m deep ponds at the same site.
The Performance of a Series of Five Deep Waste Stabilization Ponds in Northeast Brazil
S. A. Silva, D. D. Mara, R. de Oliveira; The Performance of a Series of Five Deep Waste Stabilization Ponds in Northeast Brazil. Water Sci Technol 1 December 1987; 19 (12): 61–64. doi: https://doi.org/10.2166/wst.1987.0127
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