1. Divalent salts should be added as this has been proven to be beneficial to some extent.
2. Granulation will occur faster on mainly soluble unacidified waste-waters than on acidified wastewaters. The pH should be kept as near to neutrality as possible even though granulation has been reported to occur at pH 5-6.
3. Sodium carbonate and phosphorus can be used to maintain alkalinity and buffer conditions, respectively in the reactor.
4. All essential growth factors such as N, P, S, and trace elements (Fe, Ni, Co) should be present in sufficient amounts and in available form.
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