Another new SecureChem™ system is commissioned and operating

SecureChem™ systems are used by an increasing number of clients who dose chemicals from IBCs and are frustrated by the amounts of expensive chemical wasted, simply because they have to change the duty IBC to a new one while an operator is available; for example, if the IBC would become empty overnight when nobody is available to change it for a new one. If that happens, then the risk to continuing production is very real! The only way to avoid this would be to have an operator standing by and waiting for the IBC to become completely empty and then changing it instantly! – and even then there will be some time when the chemical is then not available.

H+E developed the SecureChem™ system to address this issue and, at the same time, minimise the hazards of operators when dealing with dangerous chemicals.

Automatic Switchover

For this customer, the system handles two different chemicals and, for each one, two IBCs are connected in duty / standby mode. When one IBC is completely empty, the system automatically switches supply to the standby IBC and at the same time generates an alarm to advice that replacement of the empty IBC is necessary. However, because the IBC holds 1,000 litres of chemical, it is normally the case that it takes some days to consume the chemical and changeover is therefore not urgent.

Outside Installation

In this case, the SecureChem™ system is installed outside so it is installed in an enclosure that includes frost protection and an alarm to advise of any future leakage. When pumping the chemicals to the point of use, through the factory, dual-containment pipework was included for additional safety.


Depending on the chemicals used and perhaps on your own in-house requirements, SecureChem™ systems can be supplied in a range of materials. Typically, pipework would be PVC or ABS. However, other materials such as PP, Pe, PVDF and stainless steel are also available.

Wastage Calculator

If you know that you waste chemical but are not sure how much it costs you over a year, you can use our calculator:


Supply of Lamella Tube Modules

We have recently started work to replace Tube Modules for a Lamella Clarifier originally built in 1991. The clarifier handles wastewater produced by a Combined Heat & Power plant.

Tube Modules installed in a clarifier

Advantages of Tube Modules

Tube modules improve the efficiency of solids removal by:

  • Ensuring laminar flow across the whole surface area of the tank. Local areas of high upward velocity prevent efficient settlement.
  • Increase the effective area for solids settlement, typically by 8:1
  • Allow small solids that do not settle easily to flocculate with each other, after which they then settle.
  • Minimising the floor area that you need to allocate for settlement

The efficiency of H+E’s Tube Modules has been proven over more than 40 years. They are used in many hundreds of plants across Europe.

Strong and Long-lasting

Each tube within the modular pack is inclined at 60°. Each row or tube is inclined in the opposite direction to its neighbour rows. This ensures that flow distribution across the tank is good and also makes the Tube Modules strong.

They are fabricated in ABS, so they are light, and are easily lifted by two people. This also means that they have a log service life.

The tubes themselves have a square cross-section. This means that, since there are no “tight” angles, solids do not easily get trapped within the tubes, which would decrease efficiency.

Tube modules are often retro-fitted into existing clarifiers to increase their operational efficiency.


They can be used in more or less every application where high efficiency settlement of solids is required. This covers more or less every industrial application.

Please contact us and we will be happy to discuss your specific requirements.


New Industrial Wastewater Treatment Plant

H+E is currently designing a new plant to ensure that the client’s effluent is discharged well within the Consented limits. We know very well that maintaining production is the most important factor; the treatment plant is simply providing a service.

The plant will be designed to handle up to 20m3/h of incoming wastewater, which is a relatively common flow rate required for many companies. This is the second one of this size that we are currently designing.

Designing for the future

For us, it is very important to know both what our clients’ needs are and also how those needs might change in the future. The required quality of treated effluent discharged has become much more stringent over the years because of increased environmental concerns. BAT (Best Available Technique) is now a very important part of designing plants. Water must be used efficiently to produce less effluent. The possibility of recycling treated effluent is a more important consideration. So, all the plants we design and install take such needs into account, not necessarily by adding in all options now, but by ensuring that they can easily be added in the future.

Long-term support

H+E has been designing, manufacturing and installing such plants for many years. Our roots do actually go back to 1896! We always have at the top of our “wish list” that every single client of ours must be satisfied with what we provide. So, we make sure that the treated wastewater meets the necessary quality requirements and  at a reasonable cost. The plant will do this job both efficiently and for many years.

As a matter of course, we offer long-term Service visits and Technical Support to every client. You decide whether you accept this or not and how often you would like them. We do have many clients who do so and, what’s more, many plants which are still working well after 25 years and more. We are currently in discussions with one long-term client to upgrade a plant that was installed in the early 1990s. It is still working fine, although it now needs a bit of “TLC”!

Our wish is to maintain long-term contact with every client.


New SecureChem™ IBC Level Control & Chemical Transfer system

H+E has recently commissioned a new SecureChem™ IBC chemical dosing and chemical transfer system for two chemicals from a client in the Pharmaceutical sector.

A pre-assembled SecureChem™ chemical dosing system for two chemicals before delivery to site

A number of H+E’s clients commented about the amount of chemical commonly wasted when dosing from Intermediate Bulk Containers (IBCs). This problem really relates to the fact that there is no level control included within IBCs that tell the user when the IBC is empty but, even if there were, when using chemical non-stop 24/7 it is totally impractical to have an operator standing by the IBC ready to change it immediately once it is empty (especially if that occurs over a weekend) and, even if you did that, there is still a substantial time when the chemical is not available, simply because it takes time to disconnect one IBC, remove it, replace it with a new one and then connect it.

H+E therefore developed its SecureChemIBC chemical dosing system to address these issues, and the system has been used by our clients to work with a range of chemicals from standard dosing requirements to rather unusual needs, including dosing of tartaric acid.


System allows non-stop 24/7 operation

The system basically provides an external level control with a “buffer” volume of chemical that allows an alarm to be generated when there is no more chemical leaving the IBC whilst maintaining flow to the point of use. This means that you can connect two IBCs to the system on a “duty / standby” basis, with automatic valves that automatically switch the on-line IBC and also generate an alarm to advise that the empty IBC should be replaced.

You can also have a system with just a single IBC connected if you wish, perhaps because chemical consumption is low and only periodic.

You can also have either single or duty & standby chemical transfer pumps

Depending on its location, the level control system can be built inside an enclosure to provide weather and frost protection. Also, the chemical IBCs can be located inside enclosures.

In this particular case, the system is located outside and handles two chemicals, with duty and standby IBCs.

The Level control unit is inside an enclosure and the IBCs have electrically-heated jackets.

The chemicals are transferred inside the factory via dual-contained pipework to “Point of Use” tanks.

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A new order for biological treatment of 600 m³/h paper pulp wastewater in Bulgaria

H+E, one of the leading international designers and suppliers of industrial process and wastewater treatment systems, has received an order for a new biological wastewater treatment plant from the Bulgarian viscose pulp producer Svilocell.
In order to meet the future EU-imposed discharge limits into the River Danube, the hitherto purely mechanical wastewater treatment plant will undergo a major expansion by adding biological treatment prior to discharge.
Svilocell ultimately decided to work with H+E due to the company’s many years of expertise, as evidenced by nearly 80 plants designed and built for the pulp and paper industry, and also the very positive experiences expressed by those long-term customers. In addition, the fact that H+E’s design allows the new process steps to integrate compactly into the existing plant layout, thereby utilising the available space, was a positive factor.
Before the mechanically cleaned wastewater is transferred to the new two-stage biological purification, it will first be cooled in an indirect cooling system to the temperature compatible with the biological process. The balanced combination of the BIOFIT®.H floating bed and the BIOFIT®.C aeration results in a cost-optimised solution.
In particular, the AEROFIT.V ventilation system contributes to the intrinsic value and energy efficiency of the new wastewater treatment system since it allows trouble-free operation over a period of decades with a consistently high oxygen yield.
Biochips with an especially high specific growth area are used as biofilm carriers.
The chosen process line will equip Svilocell with a highly robust and efficient wastewater treatment facility from 2018 onwards, in order to fully meet the requirements for environmental protection.
H+E also offers other process technologies for the pulp and paper industry, such as the cost-effective and energy-efficient mechanical treatment FLOCOMAT®.T and, for tertiary treatment, the BIOFIT®.Oxyd2 or FLOCOPAC® processes to reduce resistant COD.