Another new SecureChem™ system is commissioned and operating


Chemical Dosing from IBCs

Chemical dosing from IBCs can result in a lot of expensive chemical being wasted. An increasing number of clients find this frustrating, and expensive. The wastage is simply because they have to change the duty IBC to a new one while an operator is available. This is often a problem when an IBC becomes empty overnight. 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 a short period when the chemical is then not available.

H+E’s addressed this issue by developing the SecureChem™ system. It also minimises the hazards to operators when dealing with dangerous chemicals.

Automatic Switchover

For this customer, the system handles two different chemicals. It connects two IBCs of each chemical in duty / standby mode. The system automatically switches supply to the standby IBC once the duty IBC is completely empty. When switchover happens the system also generates an alarm to advise that replacement of the empty IBC is necessary. Since each IBC holds 1,000 litres of chemical, it takes some days to consume the chemical. Therefore changing the now-empty IBC is not urgent.

Outside Installation

In this case, the SecureChem™ system is installed outside. Therefore the enclosure around the unit (that includes a heater) protects against frost, and an alarm advises of any future leakage. Dual-containment pipework provides additional safety when pumping the chemicals through the factory to the point of use.


SecureChem™ systems are supplied in a range of materials. This depends on the chemicals used and perhaps on your own in-house requirements. 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 and Installation of Lamella Tube Modules

We have recently delivered and completed the installation of replacement Tube Modules for a Lamella Clarifier originally built in 1991. The clarifier handles wastewater produced by a Combined Heat & Power plant. On the agreed date we delivered the Tube Modules. We installed them a day earlier than planned. Consequently we put the clarifier back into service a little earlier than anticipated.

Tube Modules installed in a clarifier

Advantages of Tube Modules

You really can improve the efficiency of solids settlement in a Lamella Clarifier by using our Tube modules. They:

  • Ensure laminar flow across the whole surface area of the tank, therefore avoiding local areas of high upward velocity which would prevent efficient settlement.
  • Increase the effective area for solids settlement, typically by 8:1, consequently improving settlement efficiency.
  • Allow small solids that do not settle easily to flocculate with each other, after which they then settle.
  • Therefore minimise the floor area that you need to allocate for settlement

Over 40 years of use has proven the efficiency of H+E’s Tube Modules. Many hundreds of plants across Europe use them.

Strong and Long-lasting

Within the modular pack, each tube is inclined at 60°. Each row of tubes is inclined in the opposite direction to its neighbour rows. Consequently, flow distribution across the tank is good and also makes the Tube Modules strong.

Fabrication in ABS ensures they are light, hence easily lifted by two people, and have a long service life.

The tubes themselves have a square cross-section. Therefore there are no “tight” angles to easily trap solids. This maintains their operating efficiency for the long-term.

You can increase operational efficiency by retro-fitting Tube modules into existing clarifiers.


When you need high efficiency settlement of solids, Tube Modules are an appropriate solution in more or less every case.

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 designed, manufactured and installed 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

Many of H+E’s clients dose chemicals from Intermediate Bulk Containers. Some have commented about the amount of chemical they waste. This problem is really because there is no level control included within IBCs to advise when the IBC is empty. Also, when using chemical 24/7 it is impractical to have an operator standing by the IBC ready to change it immediately once it is empty. This is especially true at weekends. Even if you did that, there is still a substantial time when the chemical is not available. This is because you have to:

  • Disconnect the empty IBC and 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. SecureChem™ systems are used by our clients to work with a range of chemicals. This ranges 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. An alarm is generated when there is no more chemical leaving the IBC whilst maintaining flow to the point of use. You can connect two IBCs to the system on a “duty / standby” basis, with automatic valves that automatically change the on-line IBC. The system also generates an alarm to advise that the empty IBC should be replaced.

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

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

The level control system can be built inside an enclosure to provide weather and frost protection, depending on its location. 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.

Dual-contained pipework  transfers the chemicals inside the factory to “Point of Use” tanks.

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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. Svilocell, a Bulgarian viscose pulp producer has to meet the future EU-imposed discharge limits into the River Danube. To achieve this, H+E will provide expansion by adding biological treatment to the existing purely mechanical wastewater treatment plant.

H+E’s Long Experience

Svilocell ultimately decided to work with H+E due to the company’s many years of expertise. We have designed and built nearly 80 plants for the pulp and paper industry. Those long-term customers have also expressed their very positive experiences! Another positive factor was that H+E’s design allows the new process steps to integrate compactly into the existing plant layout. This utilises the available space efficiently.
Before the mechanically-cleaned wastewater is transferred to the new two-stage biological purification, it is first 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. 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.

Wide range of available Technologies

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.

Long-Term Support

H+E has always offered Long-Term Technical Support, Servicing and Spare parts to every client. In many exceeds 25 years, demonstrating the long life of our designs. We also offer the same service to you if your plant was supplied by another company. Please just contact us and we will be happy to talk to you about your needs.