Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

First Use of a Membrane Bioreactor with Reverse Osmosis in the Pulp and Paper Industry anywhere in the World

07.03.2008
Siemens Solution Reduces Volume of Wastewater at German Board Producer by 90 Per Cent

The Siemens Industry Solutions Division (IS) has received an order from Albert Köhler GmbH & Co. KG in Gengenbach, Germany, to install a membrane bioreactor plant with downstream reverse osmosis for wastewater treatment.


Computer-animated image of the wastewater treatment plant

This means the German board producer will be the first company in the world to have such a capability at its disposal. The system will enable almost all the process water to be reused and will reduce the volume of wastewater by some 90 per cent. Not only that: the Siemens solution will reduce the need for process steam and thus cut energy costs. The new wastewater treatment plant is due to be commissioned as soon as the spring of 2008.

Albert Köhler GmbH & Co. KG, based in Gengenbach, Baden-Württemberg, employs 120 people and uses a Fourdrinier machine and two cylinder wrap machines to produce about 40,000 tonnes of high-quality board each year for folders, books and packaging, for the automotive industry, the construction sector and the woodworking industry and for advertising and display products. In order to counter the cost pressure from rising energy costs and water charges while at the same time reducing environmental impact, in June 2007 Albert Köhler GmbH commissioned Siemens to investigate the potential of a wastewater treatment system using a membrane bioreactor (MBR) with integrated partial flow treatment as part of a pilot project.

Following the successful conclusion of the pilot phase, this solution concept will now be implemented for the entire wastewater treatment system at Albert Köhler. For this, the wastewater is first cooled by means of a plate heat-exchanger system downstream of the existing primary treatment stage. The wastewater then passes into the biological clarification plant. This consists of an aerobic stage with three cascades and is operated with an activated sludge concentration of 8-10 g/l. A membrane operating system (MOS) serves as the separating facility. Activated sludge and air are injected here using the MemJet process. The resultant optimized flow to the membranes causes intensive cleaning of the membrane surface in ongoing operation, which helps achieve higher specific throughput rates and longer cleaning intervals. This means that the membranes can also be operated efficiently and economically at high CaCO3 loadings and sludge concentrations – key prerequisites for use in the paper and pulp industry, where polluting loads are high.

The MOS system consists of three parallel lines, which allows fully automatic cleaning of the membranes during operation without causing any changes to the hydraulics. A partial flow treatment stage with reverse osmosis (RO) is installed downstream of the MBR plant. Its purpose is desalination of the wastewater. As a result it is possible to return 90 per cent of all the wastewater to production with no loss of quality in the product. The ultrafiltrated wastewater is piped via an interim tank and a pumping station back to the existing fresh water reservoir. From there, the treated water is distributed through the production system together with the fresh water (supplementary water).

The mechanical engineering and all the plant technology is being produced in a containerized design, accommodated in six container modules. This will enable construction to be completed in only two months. Installation work on site will therefore be reduced to establishing the links between the modules and integrating the activation stage. As well as turnkey delivery of the new wastewater treatment plant, Siemens is also responsible for approval planning, engineering and construction of the plant.

In addition to reducing expenditure on fresh water and wastewater, the Siemens solution will also make a significant contribution to conserving energy. Because the process water can be largely reused, less steam needs to be produced in the power plant. This reduces both fuel costs and CO2 emissions from the plant.

The comprehensive wastewater treatment solution with the key core technologies of a membrane bioreactor with integrated ultrafiltration and downstream reverse osmosis plant constitutes an innovation in the paper industry which has never been implemented before in this form anywhere in the world. The system allows for an optimum combination of economic efficiency and environmental protection. For that very reason the German Federal Environment Agency has recommended its inclusion in the program run by the Federal Ministry for the Environment, Nature Conservation and Nuclear Safety (BMU) to promote investment in demonstration projects designed to reduce environmental impact.

The Siemens Industry Sector (Erlangen, Germany) is the world's leading supplier of production, transportation and building systems. Integrated hardware and software technologies combined with comprehensive industry-specific solutions enable Siemens to enhance the productivity and efficiency of its customers in industry and infrastructure. The Sector comprises six Divisions: Building Technologies, Industry Automation, Industry Solutions, Mobility, Drive Technologies and Osram. In fiscal 2007 (ended September 30), Siemens Industry generated sales of approximately EUR40 billion (pro forma, unconsolidated) with around 209,000 employees worldwide.

With the business activities of Siemens VAI Metal Technologies, (Linz, Austria), Siemens Water Technologies (Warrendale, Pa., U.S.A.), and Industry Technologies, (Erlangen, Germany), the Siemens Industry Solutions Division (Erlangen, Germany) is one of the world's leading solution and service providers for industrial and infrastructure facilities. Using its own products, systems and process technologies, Industry Solutions develops and builds plants for end customers, commissions them and provides support during their entire life cycle.

Dr. Rainer Schulze | Siemens Industry
Further information:
http://www.siemens.com/paper
http://www.siemens.com/industry
http://www.industry.siemens.com

More articles from Process Engineering:

nachricht New manufacturing process for SiC power devices opens market to more competition
14.09.2017 | North Carolina State University

nachricht Quick, Precise, but not Cold
17.05.2017 | Fraunhofer-Institut für Lasertechnik ILT

All articles from Process Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: A “cosmic snake” reveals the structure of remote galaxies

The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.

Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...

Im Focus: Visual intelligence is not the same as IQ

Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.

That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...

Im Focus: Novel Nano-CT device creates high-resolution 3D-X-rays of tiny velvet worm legs

Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.

During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....

Im Focus: Researchers Develop Data Bus for Quantum Computer

The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.

Future quantum computers will be able to solve problems where conventional computers fail today. We are still far away from any large-scale implementation,...

Im Focus: Wrinkles give heat a jolt in pillared graphene

Rice University researchers test 3-D carbon nanostructures' thermal transport abilities

Pillared graphene would transfer heat better if the theoretical material had a few asymmetric junctions that caused wrinkles, according to Rice University...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Ecology Across Borders: International conference brings together 1,500 ecologists

15.11.2017 | Event News

Road into laboratory: Users discuss biaxial fatigue-testing for car and truck wheel

15.11.2017 | Event News

#Berlin5GWeek: The right network for Industry 4.0

30.10.2017 | Event News

 
Latest News

NASA detects solar flare pulses at Sun and Earth

17.11.2017 | Physics and Astronomy

NIST scientists discover how to switch liver cancer cell growth from 2-D to 3-D structures

17.11.2017 | Health and Medicine

The importance of biodiversity in forests could increase due to climate change

17.11.2017 | Studies and Analyses

VideoLinks
B2B-VideoLinks
More VideoLinks >>>