That means that nanobacteria probably become coated with proteins or other organic molecules, which stop them from growing like a regular, jagged limestone crystal and instead look like round blobs.

The results have shown that inorganic agents such as hydrochloric acid, zinc sulfate and lime and the organic reagent starch can remarkably improve the washing effect while dispersant reagent can't.

The laboratory and industrial test of organics removal in raw water by lime process is described in this paper.