Frequently Asked Questions



In the event of a power cut, the tank will not cause any problems if without electricity for two to three days. If left any longer, septicity may occur.

 It depends on how the treatment plant works, and how much it is used. Some HiPAF plants have to be emptied every couple of months, and others like the Ion india  Diamond DMS can have extended emptying periods up to 3 years.  Reputable companies will know how to de-sludge our plants.

 As an internationally-recognised leader in the design, manufacture and supply of both standardised and bespoke environmental solutions, Ion India  is dedicated to providing the highest quality products and services.

All Ion india  sewage treatment products are supplied with a lifetime process guarantee from date of delivery.  The tank element of our products have a 10 year guarantee. Guarantees for the pumps and blowers in our HiPAF range vary due to it being tailored to your requirements. Blowers and pumps in the WPL Diamond range have the following guarantees:


These guarantees are all subject to our t&c’s.  For more information please see our warranty page.

The sbr and mbbr use an aerobic digestion process to naturally treat sewage waste.  Wastewater enters the plant via an inlet pipe where it is then treated in the central aeration chamber.  Clarified effluent is then discharged via the outlet pipe.  For a more detailed description download our brochures.

A septic tank receives untreated wastewater from a property and allows the heavier solids to settle at the bottom whilst the effluent rises to the top. Endemic bacteria helps the system break down the solids and sludge. The remaining liquids flow out of the tank into a drainage field. The effluent from a septic tank still contains about 70% of the polluted matter in the sewage, and further treatment is necessary, whereas a sewage treatment plant gives aerobic digestion of the wastewater contaminants, and treats to a much higher standard than a septic tank. Treatment plant effluent can then be discharged into a water course, ditch (with Environment Agency approval) or to a conventional soakaway.

Surface water cannot connect to the treatment plant.

With further proprietary equipment the water can be used for irrigation.

Our domestic sewage treatment plants are designed to sit below ground. A comprehensive installation manual is supplied with each plant, which you should read thoroughly prior to specification and installation. We recommend that you use an experienced and qualified installer – for details of those in your area, please contact a member of the Ion Inda sales team.


Newly installed sewage treatment plants can be used immediately.  The biological process can take between 6-8 weeks to start working.

Water quality is defined by the level of three pollutants that are present in the effluent leaving the treatment plant. The three pollutants are:


Biological Oxygen Demand (BOD) – a measure of organic pollution

Suspended Solids (SS) – solids retained after filtration

Ammonia (AMM-N) – breakdown of the organic nitrogen forms

These measurements are expressed in milligrams per litre e.g. 20mg/l (BOD), 30mg/l (SS), 20gm/l (AMM-N) – 20:30:20.