Hi Maymoun, I would kindly ...

Hi Maymoun,

I would kindly ask some more questions to help you better:

What kind of aerators are you using? And how long are you running the aerators? 24/7 ? (The questions goes for the positioning to improve the treatment)

General speaking the treatment can be improved by

1. Checking the amount of sludge on the ground and if to high remove the sludge to get more active volume in the lagoons again!

2. getting a better mixing (for example OLOID in Combination with your aerators), improvement of the flow inside the lagoons (use more of the volume in the lagoons to get better treatment results). The OLOID would also distribute the Oxygen better in the lagoons.

3. If the oxygen level is to low in the aerated lagoons than you need more aeration or a bigger lagoon as Gary Brown said, because the load is too much. Please measure the oxygen level in the lagoons and you will see if it is enough (min. 1,5 mgO2/l until 2,5 mgO2/l) if you are always under 1,5 mgO2/l than the aerobic treatment will not work as good as it could be.

One typical improvement and low energy solution if possible with the heights could be an rotating biological contactor before the lagoon treatment to reduce the load input in the lagoons.

4. Improvement by splitting the lagoons for example with floating wetlands into parts will also improve the result, because the treatment will be in steps, short cut flow is eliminated and the roots of the plants will increase the surface for the bacteria to grow and do the work for you.

5. The floating wetlands can also be positioned at the outlet of the lagoons to reduce the overflow of active bacteria from one lagoon to the next one (the roots will work as a filter).

I you wish that I help you in a more specific way than please let me know and I would need some drawings, aerator information, load input and if you have some photos.

Email: eric.schieblich@inversions-technik.ch

All the best

Eric Schieblich (CEO of Inversions-Technik GmbH, Switzerland)