Excellence in providing solutions for biogas plants

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1 Pumping and Mixing Technology Excellence in providing solutions for biogas plants Probably the world s most extensive program of chopper pumps, propeller mixers and mixing systems permits trouble-free handling of slurries and sludges with a high content of organic material in every step of liquid handling on both industrial and farm related biogas plants. Mixing and chopping Anaerobic Digester Mixing Slurry Pumping Pasteurisation Engineered to last

2 Landia, first and last on biogas plants Powerful mixers and pumps with a unique cutter system ensure excellent chopping and mixing in the pre-treatment tank. A homogenous sludge without harsh or large solids is crucial to a fast anaerobic process and maximum gas production. For pasteurisation, Landia offers a patented stand alone fully automated unit for treatment of category 3 by-products. Landia offers three different types of equipment for anaerobic digester and post digester mixing. Great emphasis is placed on mixing systems that can be maintained from the out-side of the tank, without costly, complicated and risky procedures of having to open or even empty the tanks. Mixer design in storage tanks is always based on intermittent, quick and powerful mixing prior to emptying the tanks with a minimum of energy consumption and mixer wear. The extensive range of different types and sizes of chopper pumps permits to offer solutions to all major pumping applications on a biogas plant. A range of high pressure pumps allows pumping to and from tanks, pumping through heat exchangers and pumping over long distances at times up to several kilometers even in the case of considerable headloss. For extreme abrasive conditions knives, impellers; pump front and back-plates in hardened materials can be offered.

3 Reception and pre-mixing tank In this tank, different liquids e.g. slurry, sewage sludge or manure are mixed with biomass or organic waste such as corn or grass silage, organic food waste, fats, etc. Often, dry biomass is mixed into the liquid. This requires chopping of the biomass and powerful mixing of the dry material into the liquid part. A homogenous substrate without any harsh or large pieces of dry matter is of crucial importance to the following anaerobic digestion process. Landia offers highly efficient propeller mixers and chopper pumps for this application. Anaerobic digester and post digester Anaerobic digester mixing has to be reliable and energy efficient. Landia s patent pending mixing system GasMixTM meets these demands. No rotating equipment inside the tank, easy maintenance without the need of opening tank cover or entering the tank and without expensive loss of gas production. In very large tanks, side entry mixers model PowerMixTM can be installed. Storage tank Landia s submersible mixers are specifically engineered for mixing of all kinds of slurries and sludges with a high content of dry matter. Applications can be digestate, slurry, sludge from waste water treatment plants and a number of industries. They are well suited to put settled or floating solids back into suspension. Low propeller rotation ensures high efficiency. The propeller design permits clog-free mixing even in liquids containing large amounts of stringy material or rags. Unique triple shaft sealing system for gear and motor protection against the surrounding liquid. Advantages of using Landia chopper pumps on biogas plants Landia chopper pumps are well suited for all major pumping applications on biogas plants. Built for heavy duty applications where foreign objects often create a severe pumping environment for other pumps, the unique cutter system and open impellers bring a number of advantages: Smaller foreign objects such as grit, sand, small pieces of broken glass can pass through the pump without damaging it and with only minimal wear. Sudden blockage because of larger foreign objects will normally not damage the pump. No need for expensive pre-grinders and macerators. No pressure pulsation in the pipe system.

4 Anaerobic Digester Mixing System GasMix tm GasMix TM systems are ideally applied for homogenizing anaerobic digester contents. Significant advantages compared to conventional digester mixing systems: No rotating equipment inside the tank Easy maintenance and service without need of emptying the tank or opening tank covers. No costly loss of gas production during pump maintenance Significantly improved Health and Safety conditions due to external installation. Reduced capital cost, no access walkways, platforms or hoists required. Landia s chopper pumps enhance cell break down. Together with gas recirculation, increased methane (CH 4 ) concentration can be achieved. Unique 3-dimensional mixing pattern reduces formation of scum layers. Powerful mixing is achieved by a chopper pump and one or more top gas/sludge ejector nozzles and a bottom mixing nozzle Demo video on: mixers/gasmix

5 Chopper Pumps An extensive range of equipment Landia Pumps with unique cutter system the answer to all pumping applications on biogas plants. Back plate and front plate with guide traces Open impeller Rotating and fixed knives The unique cutter system is clearly separated from the pump casing and the impeller. This prevents blocking of the pump and its subsequent piping as all chopping is completed before it enters the pump housing. Pump casing, impeller and sealing system will not be worn or damaged in connection with the chopping process. The hard wearing cutter system is made of hardened steel, long lasting and easy to replace. Large selection of materials and options All Landia chopper pumps are equipped with a cutter system of two rotating and one or three fixed cutters. The pumps are manufactured in cast iron or acid-proof stainless steel. For abrasive conditions hardened knives, impellers; pump front and back-plate in special materials can be offered. 2-component painting is optional. Installation equipment is available in several qualities of stainless steel or galvanized mild steel. Motors are available in different explosion proof versions. Chopper pump for dry installation Type: MPTK-I Motor sizes: kw. Submersible chopper pump Type: DG-I Motor sizes: kw. Long shaft chopper pump for wet well installation Type: MPG-I Motor sizes: : kw. Vertical or horizontal installation directly into the piping system. Vertical or horizontal installation,with or without coupling foot.

6 Propeller Mixers The Landia mixing systems for biogas plants are based on many years of experience in mixing and homogenizing slurries and sludges. An extensive range of mixers with large blades and low propeller rotations ensure energy efficient long lasting solutions in liquids with high solids content. Landia propeller mixers are equipped with a unique triple shaft sealing system as a dependable protection of gear and motor in liquids with high solids content. A special outer seal against the surrounding liquid ensures that stringy and long fibrous materials from grass, straw or corn will not damage the mechanical seals in the interior part of the sealing system. Large selection of materials and options Submersible mixers are available with cast iron or solid acid proof stainless steel motor casings. 2-component painting of propeller, gear and motor casing are optional. Installation equipment is available in several qualities of stainless steel or galvanized mild steel. Motors are available in different explosion proof versions. Submersible Mixer Type: POP-I Mixer with submersible motor and gear. 300 rpm. Motor sizes: kw. Side entry Mixer PowerMix TM Type: POPTR-I Mixer with dry installed motor, wetted parts propeller and gear. 300 rpm. Motor sizes: kw.

7 BioChop Hygienisation unit for category 3 by-products according to Regulation (EC) no. 1774/2002. Treating these by-products by the Landia BioChop hygienisation unit makes it possible to pump each treated batch directly into the anaerobic digester. The system is characterized by its simple design with reliable high quality components and a unique multipurpose application of one Landia chopper pump for chopping, mixing and emptying the unit. Main components of the BioChop compact unit: Insulated stainless steel tank with heat jacket. Landia chopper pump for chopping, mixing and emptying. Necessary valves in stainless steel. Level control. Complete control with data logger. The unit is available in several standard sizes with volumes from 2.5 to 8.0 m 3.

8 Landia, founded in 1933 today is a modern, successful, and firmly based manufacturer of a comprehensive program of chopper pumps, propeller mixers and aerators, offering customized solutions and systems for difficult to handling liquids with a high dry matter content, biomass and other organic waste. Our customers are involved in the conception and construction of biogas plants, municipal and industrial waste water treatment, treatment of by-products and waste from food processing, agricultural slurry handling and much more. We support our customers through our subsidiaries and offices in the UK, US, Germany and China and a worldwide net of professional distributors. Distributor: AK10A.C Landia A/S Industrivej 2 DK-6940 Lem St. Tel.: Fax: info@landia.dk