Changes

{{procontable | proborder="1" cellpadding="5" cellspacing="0" align="center"|-! width="50%" style="background:#efefef;" | Advantages! style="background:#ffdead;" | Disadvantages|-| valign="top" |- Resistant to organic and hydraulic shock loads. <br> - No electrical energy required. <br> - Greywater can be managed concurrently. <br> - Can be built and repaired with locally available materials. <br> - Long service life. <br> - No real problems with flies or odours if used correctly. <br> - High reduction of organics. <br> - Moderate capital costs, moderate operating costs depending on emptying; can be low cost depending on number of users. | convalign="top" | - Requires constant source of water. <br> - Effluent require secondary treatment and/or appropriate discharge. <br> - Low reduction pathogens. <br> - Requires expert design and construction. <br> - Pre-treatment is required to prevent clogging.|}}