Arthrospira (Spirulina) in tannery wastewaters. Part 1: The microbial ecology of tannery waste stabilisation ponds and the management of noxious odour emissions using microalgal capping Arthrospira (Spirulina) in tannery wastewaters. Part 1: The microbial ecology of tannery waste stabilisation ponds and the management of noxious odour emissions using microalgal capping Posted in .