An Innovation launches ...

HESA

HESA was created with the aim of providing, building and developing ​technical, simple and innovative solutions in the hydraulic and water ​transfer fields, in various applications.

In the field of wastewater lifting, HESA has developed and perfected a ​Solid Material Separation and Expulsion Device, marked DSEMS®, the ​technology, operation and innovation of which have been the subject ​of a patent filing.

The DSEMS® system makes it possible, in the application of lifting ​stations, to overcome the problems of wipes by transferring them ​directly to the WWTP via the wastewater network but without going ​through the tank of the lifting station.

Solid materials and waste can therefore no longer clog the pumps.

The screen basket is removed as well as its handling by the agent.

This eliminates, among other things, unsanitary stains from town hall ​agents and employees for cleaning, handling and unclogging the ​screen basket or pumps.

Saves time, saves money and eliminates painful tasks.

Sc​reen Basket

The screen basket is ​the protection device ​for the pumps in a ​lifting station. When it ​overflows, the ​materials are no longer ​retained.

It must therefore be ​taken out regularly and ​cleaned by hand.

During this handling ​time,

there is no longer any ​protection for the ​pumps.

The DSEMS® system in a lifting station:

• Improves the working conditions of agents
• Extends the lifespan of lifting pumps
  
• Maintain a clean and ventilated area
  

• Eliminates painful operations for a​g​ents
  

Human contact

Contact with dirty, ​unsanitary and ​bacterial waste as well ​as splashes of effluent ​on the face are a ​dangerous and ​infectious working ​environment for agents.

The work environment ​is unpleasant.

Handling

Handling is mainly done ​to clean the screen ​basket and clogged ​pumps.

This is a significant and ​curative cost with no ​gain whatsoever.

With all the hazards ​involved in manual or ​hoist handling.

Cl​ogged Pumps

The wipes clog the ​pumps, blocking them ​and putting them out of ​service. The risk of ​overflowing the station ​then becomes ​significant.

It is therefore ​necessary to take out ​the pumps.

This operation is ​curative and physical.

During this time the ​position is no longer in ​an optimal situation.

Hydrocleaning

When the basket is ​overflowing with ​materials, and the ​station is saturated ​with materials and ​grease, there is no ​other solution than to ​clean it with a sewer ​jetter truck.

This also represents a ​significant operating ​cost.

Appearance of the station upon ​commissioning

Arrival of effluent

Appearance after 11 months

and 11,000 m3 of effluent passed

Appearance after 11 months

and water jet cleaning

After more than 9 months total absence of solid materials:

100 % of solid materials, waste and wipes expelled to the WWTP

• In the bottom of the lifting station
  
• On the surface of the water miror
• around cables and probes
• around stainless steel parts

DSEMS® overload test on test ben​ch

Sending 3 kg of various non-destructible materials in 2 minutes 30 seconds

in a volume of 250 liters of water (15 cm) ... then expulsion

(Clothes, textile materials, wipes of all types, etc.)

Materials sent

at the collector inlet

Recovered materials

at the both DSEMS exit

Separation:

from 0 to 2min17 s

from 2min33s to 2min44s

Expulsion:

from 2 min18 s

to 2 min45s

Absence of

solid materials

in the tank

Curative hydrocleaning ​removed

Water jet cleaning

Lifting station ​remains clean and ​ventilated

Lifetime extended pumps

No clogged pumps

No handling

c​logged pumps

No contact

agents with waste

100% of the time

the pumps are protected