3.8 Benefits and Limitations
The various benefits and limitations of aerobic digestion are presented in the following table.
| Benefits | Limitations |
|---|---|
| The end product produced by this method is biologically stable and odourless | The process requires a constant source of electricity and has a high energy consumption |
| This method does not release unpleasant odours. – It achieves higher rates of destruction of organic solids | Digested solids have poor mechanical dewatering characteristics |
| It requires less volume and retention time than anaerobic digestion | The process is significantly influenced by different factors such as temperature, solid concentration, and type of mixing |
| This method can be adjusted as per specific discharge limits | The design and operation of the process require skilled personnel, and some parts and materials may not be locally available |
| If the temperature is controlled to reach above 55oC, it offers a high reduction of pathogens (up to 99%) | The process must include a thickening operation |
| Non-oxygen-aerated systems require highly efficient aeration | |
| The process is prone to complicated chemical and microbiological issues |
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