System comparison
KSB Amajets | Flushing facilities | Mechanical scrapers | Mixers | Sewer flushing decives creating a surge of water | |
|---|---|---|---|---|---|
Structural changes excluded | Yes | No Permanent pipelines with spray nozzles | Yes | Yes | No Tank must be lowered and a retaining wall can become necessary, dependent on the tank size |
Use of external water excluded | Yes | No Drinking or industrial water with additional energy expenditure | Yes | Yes | No Drinking or industrial water with additional energy expenditure |
Independent of tank shape | Yes | Yes | No Open tanks required, smooth bottom shape required | No Optimum results only in round tanks with a high discharge rate and central discharge point. | No Only rectangular tanks with a sufficently dimensioned gully |
Independent of water level | Yes | No Tank can only be cleaned when discharged | No Tank can only cleaned when discharged | No Optimum results only in round tanks with a high discharge rate and central discharge point. | No Tank can only be cleaned when discharged |
Prevention of fouling and odour nuisance in case of longer standing times | Yes | No Fouling possible | No Fouling possible | No Fouling possible | No Fouling possible |
Constant cleaning efficiency | Yes | No | No Towards the end risk of sludge dewatering - manual cleaning | No At a sufficient water level | No System-related surge of dirt, final discharge is especially pollution intensive |
Wall cleaning | Yes | No | No | Yes | No |
Complete cleaning incl. problematic areas | Yes | No Gully clogs | No Gully must be flushed out, risk of sludge dewatering | No At a low water level residual contamination possible | No Gully clogs, repeated flushing required in case of a high degree of pollution |
Conclusion | Most economical solution. Individual solution for any tank of any shape. | Intensive capital spending, high water consumption, nozzles clog, thus ineffective | High acquisition and maintenance costs, can be used in tanks which have been precisely designed for them | Can only be used in case of short discharge times | High investment costs, expensive construction and additional gully cleaning necessary, can be used in tanks which have been precisely designed for them |