Industrial water treatment

Implementation of Ydro Process at classical wastewater treatment plants without biogas production.

Before deciding to implement the method, a careful analysis of:

– the parameters at which the station was designed and the parameters at which it is currently operating

– the history of the qualitative and quantitative influence during the last year

– technological flow

– the way the influent enters the station: gravitational or by pumping

– the quality of the industrial wastewater entering the treatment plant.

Preparation: the daily dose of microorganisms is added to a container containing 10 liters of clean water and 1/2 liter of wastewater, stir, leave to sweep for 10 hours, then enter at the entrance to the station, immediately after the thick grates.

Procedure:

After 8 weeks there will be a 80% reduction of the excess sludge sent to dehydration.

During the implementation and after this period, the following measurements will be made:

-the measurement of the influent parameters (we recommend that the sampling be done with an automatic sampler in 24 hours with 24 ampoules and to analyze the average sample).

-measurement of diluted oxygen in aeration.

-measurement of sludge quality (MLSS, sedimentation in 30 minutes, IVN).

-measurement of the oxidationduction potential in the primary decanter, in the anoxic zone, from the exit from the aeration and from the recirculated sludge.

-measurement of the thickness of the activated sludge layer formed in the secondary decanter.

It is important that external recirculation and internal recirculation in the station can be adjusted, and that aeration can also be adjusted.

An amount of excess sludge, calculated as equal to 5% of the inlet flow of the influent, must be able to be recirculated at the entrance to the station.

In the event that mechanical, electrical or shock damage occurs in the treatment plant, in order not to affect the effluent, it is necessary that for a limited period of time, a quantity of sludge is extracted and dehydrated. We recommend that every 3 months a small amount of sludge be dehydrated (which can then be reintroduced at the entrance to the station) so that the sludge dehydrated section is kept in working order.

Following the implementation of the Ydro Process, the analyses indicate the elimination of pathogens in the percentage of 99.9% no longer needing the operation of tertiary effluent treatment.

The Ydro Process bacteria act in a temperature range between 4-37 C, a fact demonstrated in Romania at the applications of Întorsura Buzaului, the area of Harghita County, Câmpulung Muscel where the temperature of the influence during the winter was 6 degrees.

The activated sludge formed has a low viscosity, it is not clogged and allows to work with concentrations of the MTS from 3000mg/l to 15,000 mg/l without problems.

Implementation of the Ydro Processmethod in wastewater treatment plants withbiogas production

The objectives of this implementation consist of:

– elimination of dehydrated sludge

– maintaining existing biogas production

– elimination of fats from the system

– elimination of odors from the treatment plant

And in this case, a preliminary study of:

– the parameters at which the station was designed and the parameters at which it currently operates

– the history of the qualitative and quantitative influent during the last year

– technological flow

– the way the influent enters the station: gravitational or by pumping

– the quality of the industrial wastewater entering the treatment plant.

– existing biogas production

As for the way of preparation, it is similar to the one described above, and the place of application can be the one after the thick grates or in the aeration area.

The measurements and implementation operations described above are also valid here.

The existing technological flow in the treatment plant does not change with the implementation of the Ydro Process method at the treatment plant.

To increase the amount of biogas it is important to examine, together with the station operators, the technical possibility of quickly transferring the sludge from the primary decanter to the digester. We recommend this, to reduce the amount of primary sludge converted into CO₂ and implicitly, the increase of sludge converted into CH₄.

A percentage of excess thickened sludge must be recirculated at the entrance.

It is essential to find a technical way of recirculating the fermented sludge from the thickening decanter at the entrance to the station.

We also recommend that the sludge dewatering section be kept in working order.