Section 1

Discover Value.
Discover Invoque®.

MULTIPLYING PROFIT BY
DIVIDING RESOURCES

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The growing issue

OF SEDIMENTS

Increasing human activity has dramatically increased both the rate of sedimentation and total volume of sediments globally. Dealing with these sediments responsibly is not only about a commitment to stakeholders, but a promise to minimize the impact on the environment. As resources and space continue to dwindle, how can we ensure that plans for economic growth do not lead to the demise of our beautiful planet?

The tons of challenges

ALL AROUND THE WORLD

Sediments collect in staggering volumes in our rivers, waterways and harbors and as a consequence of industrial activity in a number of sectors. Globally, hundreds of millions of tons of these sediments require effective dewatering, and the quantity is growing all the time.

66

Million
tons

Europe

145

Million
tons

North America

53

Million
tons

Latin America

50

Million
tons

Africa and Middle East

472

Million
tons

Asia Pacific
and Australia

How can we ensure sustainable sediment management?

MICHAEL SIEVERS FROM CUTEC INSTITUTE HAS THE ANSWERS

Section 3
Michael Sievers,
Head of Department of Waste Water Processing
Technologies at the Cutec Institute
You work for the Department of Waste Water Processing Technologies at the Cutec Institute. What does your research focus on?
Our focus is on the development of integrated solutions for the reuse of water, as well as material and energy resources. This applies to the development of new process combinations, including innovative process units to improve both water and carbon footprints. Preferably, we work together with industrial partners and operators to foster the transfer of innovations into practice. For example, our activities and experiences at Hamburg’s sediment treatment plant METHA led to a more sustainable treatment.

»More complex treatment concepts are needed to accomplish the aims of totally recycling sediment and minimal environmental pollution within economical requirements.«


What kinds of environmental problems occur through the dewatering of sediments?
Silt materials are mostly contaminated, e.g. by heavy metals. The success of silt treatment concepts depends on costs. The reuse of silt materials reduces costs significantly. The challenge is to meet the product quality for the reused material, e.g. no leaching of heavy metals. More sustainable solutions consider also the improved protection of our water bodies of water, e.g. by use of environmental friendly chemicals and process water recycling.

How can we make sediments reusable? Or what would help to make sediments more reusable?
The challenge in sediment recycling is the treatment of silt with particle sizes below 20 µm. More complex treatment concepts are needed to accomplish the aims of totally recycling sediment and minimal environmental pollution within economical requirements.

How do you convince companies of sustainable technologies, especially for large industrial projects?
We look for innovative approaches to create a win-win-win solution. This means reduced treatment costs for the operator, new clients for the industrial partner and last but not least an improved quality of life. Such solutions need to be developed from lab to full-scale, starting with a feasibility study, and we are well positioned to support the industry in this way.
Section 3

Michael Sievers,
Head of Department of Waste Water Processing
Technologies at the Cutec Institute

What specific problems do you encounter with existing technologies used to dewater sediments?
In sediment dewatering, there is plenty of room for improvement regarding process efficiency. For example, the approach of flocculation engineering is one of the keys to success, but it is mostly undervalued and therefore not widely applied. In the last years, we have developed different techniques to adapt to existing technologies to the flocculation engineering approach. Now these techniques need to be applied and/or further techniques may be developed.

Invoque_Hafen

Dewatering with Invoque®

A GLOBAL SOLUTION THAT
DELIVERS CLEAR VALUE

All sediments are different, with each having its own unique origin and lifecycle. As a consequence, effective dewatering presents a technical and economic challenge for process owners, especially where very fine sediments are concerned. Versatile solutions that offer the broadest performance window are required.
Section 5 Bubble 1

01

SITE SURVEY

From the copper mines of Georgia to the riverbed of the Bosphorus, from saltwater to freshwater, the flexible Invoque® performance dewatering system can effectively dewater almost any type of inorganic sediment. Detailed physical survey data and water analysis, as well as an exact sediment characterization for the site, enable us to create a tailor-made solution for a variety of challenging applications—from river rehabilitation to mining services. But how exactly?
Section 5 Bubble 2

02

CONDITIONING

Proprietary, mineral-based conditioning additives are injected into the sediment by means of a mobile or fixed conditioning unit. It is here that conditioning additives are prepared and metered into the process according to specific, predefined feed parameters. The specific ratio of conditioning additives to sediment, as well as the mixing dynamics, is vital to the success of the program. These settings are calculated and adjusted by Clariant technicians for each individual application and customer. The conditioning units are designed to provide maximum distribution within the sediment to ensure effective, immediate conditioning and to guarantee optimal program performance.
Section 5 Bubble 3

03

DEWATERING

Once the sediment slurry has been conditioned, it moves to the final dewatering device, where dewatering takes place. Specific dewatering systems include geotextile tubes, thickeners, filter presses, spoil fields and other commonly available systems. Invoque® is compatible with a variety of different dewatering mechanisms and devices. In exceptional cases it has delivered dewatering performance of up to 94% solids in less than 24 hours.

Experimentation with mud

INTERVIEW WITH THE
HYDROCHEMISTRY EXPERT
HANS HARTAN

What led you to become a discoverer?
I began taking things apart and putting them back together as a child. I was interested in figuring out how the world and the objects surrounding me work.

How did you get the idea for purifying mud?
My area of expertise lies in hydrochemistry. I was determined to find a method of purifying and preparing sewage sludge and sapropel created in treatment plants, without having contaminated water afterwards. The primary focus of my work has always been developing environmentally compatible processes. So one day, I went to my hobby lab and got to work.

You really discovered it at home?
Yes. I’ve been retired for a few years now. But in my hobby lab, I have all the equipment I need. For example, I could conduct several experiments, aimed at measuring dewatering speed or regulating water clarity. Having my lab at home was also a way for me to relax.

How did you end up making the breakthrough?
Omya, an international manufacturer of industrial materials, developed a dispersant mineral for the paper industry with large surface area, but one that they had no use for. When I learned of that, I immediately thought it would be useful for dewatering sludge. So, I manufactured synthetic wastewater and then added the mineral. It worked! After just a few minutes, I had crystal clear water and I knew that I had discovered something big. I presented the technique in several places. In the end it was Clariant that recognized the potential and then in cooperation with Omya developed Invoque®.

The efficacy of Invoque® is not just a matter of the right chemistry, correct? What else is decisive?
A good dewatering system hinges on numerous parameters. Depending on the type of sediment and its organic components, mixing speed, accurate dosing and desired filtration speed are essential. Therefore, it wasn’t just chemists that worked on the development of Invoque®. Rather, it included process engineers, engineers and physicists.
Section 7

Hans Hartan,
Hydrochemistry consultant

»The primary focus of my work has always been developing environmentally compatible processes.«


No matter the application

Invoque® unlocks the
value in your sediment

Section 8 Circle 1

Mining

The mining industry faces a variety of sediment challenges, from surface and underground water-borne sediments to tailings. Each of these pose a unique set of challenges for the operational efficiency of the mine, the safe handling, storage and recovery of tailings and water, as well as the final rehabilitation of closed mines. Furthermore, as mining activity increases with population growth, competition for water for industrial, agricultural and human consumption increases—making water re-use an increasingly relevant topic for mine operators. Invoque® provides a sustainable, mineral solution that can facilitate the effective recovery of sediments for use as raw materials while reducing stress on valuable water resources.

Coastal and riverine dredging

Waterways require dredging for a variety of reasons, including legacy environmental cleanup of waterways, navigation draught maintenance, storage capacity improvement, hydroelectric inlet protection, riverfront development and harbor construction. While many of the larger sediments are self-dewatering, the fine and ultrafine suspended particles can remain suspended for decades or more, and present particular challenges to operators in terms of plume generation, settling time and dewatering. Invoque® provides an effective means of managing these issues, while releasing water that is typically clean enough to return directly to nature.
Section 8 Circle 2
Section 8 Circle 3

Tunneling

The trend to urbanization has led to a growing need for a new communication infrastructures, leading to an increase in tunneling and drilling activity and other civil engineering excavations. In many cases the excavation process results in the generation of fine materials, which are transported by and in water. Most of these fine sediments will require some form of assisted dewatering to render them economically transportable or reusable, while ensuring that water is used effectively and environmental discharge requirements are met. Invoque® provides tunneling engineers and constructors with an effective solution for tunneling fines management that can significantly lower costs and improve efficiency, while delivering additional benefits, such as improving the mechanical stability of fines to ensure that these may be reused.

No matter the application

Invoque® unlocks the
value in your sediment

Section 8 Circle 1

Mining

The mining industry faces a variety of sediment challenges, from surface and underground water-borne sediments to tailings, all of which have unique challenges pertaining to operational efficiency of the mine, the safe handling, storage and recovery of tailings and water, as well as the final rehabilitation of closed mines. Furthermore, as mining activity increases with population growth, competition for water for industrial, agricultural and human consumption increases—making water re-use an increasingly relevant topic for mine operators. Invoque® provides a sustainable, mineral solution that can facilitate the effective recovery of sediments for use as raw materials while reducing stress on valuable water resources.
Section 8 Circle 2

Coastal and riverine dredging

Waterways require dredging for a variety of reasons, including legacy environmental cleanup of waterways, navigation draught maintenance, storage capacity improvement, hydroelectric inlet protection, riverfront development and harbor construction. While many of the larger sediments are self-dewatering, the fine and ultrafine suspended particles can remain suspended for decades or more, and present particular challenges to operators in terms of plume generation, settling time and dewatering. Invoque® provides an effective means of managing these issues, while releasing water that is typically clean enough to return directly to nature.
Section 8 Circle 3

Tunneling

The trend to urbanization has led to a growing need for new communication infrastructures, leading to an increase in tunneling and drilling activity and other civil engineering excavations. In many cases the excavation process results in the generation of fine materials, which are transported by and in water. Most of these fine sediments will require some form of assisted dewatering to render them economically transportable or reusable, while ensuring that water is used effectively and environmental discharge requirements are met. Invoque® provides tunneling engineers and constructors with an effective solution for tunneling fines management that can significantly lower costs and improve efficiency, while delivering additional benefits, such as improving the mechanical stability of fines to ensure that these may be reused.
Section 9

»Our focus is on
delivering customer value.
When our customers have
to deal with hard to treat
sediments, we apply
Invoque® to transform
their pain into gain.«

Gerry Southwood,
Global Head of Business Group
Sediment Management



The benefits of

USING INVOQUE®

Improvement in dryness
Dry matter content can be increased by up to 94% with Invoque®. On average, the sediment is typically over 20% dryer with Invoque® when compared with existing technologies.
Less energy consumption
Invoque® has improved flow and pressure characteristics that help cut total energy consumption by nearly half.
Reduced regulatory pressure
Thanks to the improved environmental profile of Invoque®, we are able to reduce potential regulatory obstacles regarding the reuse of water and sediments.
Environmental protection
Invoque® performance dewatering eliminates potentially harmful chemicals with no additional burden on the environment.
Cost efficient
Invoque® can eliminate up to 100% of sediment disposal costs, as it enables the reuse of sediments that would otherwise require costly disposal.
Less water consumption
The innovative Invoque® system achieves exceptional dewatering results, while only using a fraction of the freshwater for treatment preparation that other systems use.
Improvement in bulk volume
Improved dryness in Invoque® can reduce bulk volume by an additional 10-20%, which significantly reduces sediment transportation and/or disposal costs.
Broad applicability
Invoque® has a broad spectrum of applicability across a wide variety of sediments and water qualities and works both in fresh and saltwater environments.

Invoque® fulfills EcoTain® criteria

OUR APPROACH TO SUSTAINABILITY

EcoTain® is our label for sustainability excellence products and solutions showcasing best-in-class performance. They highlight our contributions to a sustainable future and add value to our customers and society as a whole.


Section 12

Want to know more?

Let's get in touch

We'd really like to hear from you. Please give us a call or contact one of our sediment management professionals for more information or for questions about Invoque®.
Section 13
 
Gerry
Gerry Southwood
Head of Business Group Sediment Management
David Navas
Technical Sales Manager
Ecem Balkan
Technical Sales Representative

Want to know more?

Let's get in touch

We'd really like to hear from you. Please give us a call or contact one of our professionals for more information or for questions about Invoque™.
Gerry
Gerry Southwood
Head of Business Group
Sediment Management
David Navas
Technical Sales Manager
Ecem Balkan
Technical Sales Representative
Invoque_Rocks
  • Sediment Management

    INVOQUE® provides revolutionary solutions to turn mining, waterways and drilling sediments into valuable materials more

  • EcoTain®

    The journey to a better tomorrow starts by addressing challenges today. We live in a world today faced with a growing number of critical issues and increasing demands. At Clariant, we see ourselves on a long journey. A journey, on which we meet challenges through changes to our way of thinking—and to our way of acting at every level from the individual, environmental and societal to the economic. more

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