Treatment of water, effluent and cooling lubricants Other solutions of Leiblein

In the following, we would like to give you an overview of projects we have implemented in the recycling industry. If you require any further information or explanation, please do not hesitate to contact us.

Versatile applications References

Cleaning reusable materials from street cleaning

At a waste disposal company sludge and residual from drains and sand separators are treated. Therefore the material is washed, separated into different groups and finally sold as reusable material.

The washing water from the plant is soiled with fine sand, organic particles and other dirt particles from the street. Approx. 80 m³ of washing water is used per hour.

Impressions
Functional description

A solids separator removes coarse materials (e.g. sand particles > 63 µm). The solids are exported by a screw. The separation rate is achieved by the effective surface. In this case approx. 20m² clarifying area is needed. Through the use of inclined lamellas the clarifying area can be increased from 7 to 20m² without changing the dimensions of the container. Thus, the costs can be reduced, less space is required and the effectiveness is increased. Also see functional description lamella separator.

The water flows into the solids separator and is transferred to the lamella separator. The purified water is collected in a pit and finally pumped back to the washing machine. The particles settle onto the lamellas and slide into the sludge funnel. A grabble rake is fitted to prevent caking of the sludge. The rake continuously stirs the sludge in the tip of the funnel. The sludge gets exported when a certain sludge level is reached which is monitored by a sludge probe. The sludge is dewatered by a belt filter press.

Wastewater pre-treatment in a train wash facility

The soiled water from a train wash facility is to be treated before led into the canalization system. Therefore a membrane system should be used. In order to increase the lifetime of the membrane a system for the pre-treatment of the effluent was to be installed.

Functional description

The effluent is firstly filtered by a inclined filter, the filtrate is collected in the filter-tank and the sludge is exported. The coalescence separator removes the tramp oil.

The water flows into a reaction tank where solutes are precipitated. The last purification stage is a ultrafiltration.

Optimisation of a drying plant for the production of additives for baking mixtures

A manufacturer of drying plants for the production of baking mixtures had to increase its capacities. In the traditional process, the paste was directly led into the grinding dryer. A Leiblein infra-red dryer was connected ahead of the grinding dryer which tripled the capacity of the existing machine.

Impressions
Functional description

The paste was applied as a thin film onto the drum and the water content evaporated. The dough reaches a cake-like consistency and is transported by a conveyor screw into the existing grinding dryer. Another advantage is, that the dough already went through the temporary “sticky-state” when it enters the grinding dryer, thus enhancing the operational reliability.

Salt extraction from thermal brine

From thermal brine, which was obtained from a depth of 1000m through deep drilling, a salt granulate is to be extracted. The salt is to be used for example as bath salt for medical purposes.

Impressions
Functional description

A simple and economic solution was an infra-red evaporator from Leiblein. The machine allows to extract pourable salt granulate from the brine in a single processing step. The brine is led from a storage tank into the infra-red evaporator. The brine sticks to the rotating drum and is transported into the irradiation filed of the evaporator. The water evaporates and the dried crystals are exported by a scraper.

Once again the Leiblein infra-red evaporator led to the desired success.

Rinsing station for an evaporator plant

To rinse an evaporator plant an acid and lye rinsing station was to be build. The particular challenge was the restricted space.

Functional description

Therefore, a lamella separator was installed after the pre-treatment / dentrification. The lamella separator removes the majority of the sludge load, which can be led back into the dentrification pit. The condensate is collected in an overhead container, when the container is filled the excess water gets discharged into the canalisation.

When a rinsing of the evaporator plant is required, at first the condensate is led into the mixing container and then acid or lye is added. The medium and pH-value which is used depends on the degree of soiling of the evaporator and the medium which is to be evaporated.

Due to restricted space, a very compact plant had to be built, at the same time several safety regulations had to be met as highly concentrated acid and lye is used.

Treatment of granulate water

Slag occurs during the combustion of hard coal. This hot and liquid slag is quenched with cooling water. Due to the sudden cooling the slag solidifies and bursts, similar to glass.

The larger slag pieces are removed with scrapers and screws. Finer particles are exported with the cooling water. A grit separating device removes particles within the mm-range. Residual particles would remain in the water and led back into the river. To prevent this, even the finest particles are to be removed. Leiblein GmbH delivered a lamella separator for this purpose.

Technical details
Intake volume600 m³/h
Sludge loadheavily fluctuating ø 0,7 ml/l / 40% < 50 µm
Clarifying area600
Impressions
Functional descriptiion

The effluent is pumped into the middle channel of the lamella separator and led to the bottom, diverted again and flows up the lamellas to the top. The particles settle onto the lamellas and slide into the sludge funnel. A rabble rake prevents a caking of the sludge. The sludge is pumped to a dewatering container at intervals.

Treatment of effluent containing coating colour in a paper factory

In course of the construction of a paper factory, coating colour containing washing water is to be treated. As much coating colour ingredients as possible are to be separated by precipitation / flocculation and sedimentation.

Technical details
Volume15 m³/h
Clarifying area lamella separator50 m²
Material lamella separatorstainless steel# 1.4571 / lamella PP
Contained materialmineral pigments, binding agent, PVA, starch, optical brighteners, sodium hydroxide
Solids content inletø 2-3 % (min/max. 1-10 %)

Functional description

The washing water is collected in a buffer tank and continuously pumped to the treatment system. Particles to be separated are precipitated and flocculated in reaction containers. The water is then treated in a lamella separator.

The particles settle onto the lamellas and slide into the sludge funnel. A continuously rotating rabble rake prevents caking of the sludge. As soon as a particular sludge level is reached, the sludge is pumped off and, together with other sludge, drained by a filter press.

Depending on the washing water ingredients floating particles can occur as well. Therefore, the lamella separator is fitted with a floating-sludge remover.

Lamella separator for a globally unique groundwater remediation system

For a turnkey groundwater remediation system delivered by Prantner, lamella separators from Leiblein GmbH were used.

Beautifully located near the Lago Maggiore, at the southern end of the Alps the groundwater remediation system was installed. The plant was designed for a ground water volume flow of up to 850 m³/h. The water is conveyed from more than 30 wells and freed from pollutants like DDT, arsenic, CFC, mercury and others.

The sedimentation stage which follows the chemical-physical treatment system was fitted with lamella separators from Leiblein GmbH. To fulfill this task many different requirements had to be fulfilled, as for example:

  • Design in accordance with particular process specifications
  • Spatial integration into the overall concept
  • Adaption of dimensions for the transport through the Gotthard-tunnel
  • Optimised coordination between the dimensional and functional requirements

The following pictures should give an impression.

Impressions
Treatment of surface water including carbonate removal

For the provision of cooling and industrial water, water from a river is to be treated. After coarse cleaning the second stage is a carbonate removal system. Here, both finest particles are to be removed and the water hardness is to be reduced.

Impressions
Functional description

The river water is led into a three-chamber-reaction-container. The chemicals iron-III-chloride, limewash and flocculate are used for the treatment. Afterwards the medium flows into a lamella separator, where settleable particles are separated.

The pre-treated water flows parallel to the lamellas to the top of the lamella separator. The particles settle onto the lamellas and slide into the sludge funnel at the bottom. The clarified water flows further to the top and leaves the separator.

Reconstruction of a wastewater treatment system in the automotive industry

Reconstruction of a wastewater treatment system in the automobile industry The central water treatment system of a automotive factory had to be renewed and upgraded to the current state of the art. The key components of the plant were: chromate decontamination, emulsion separation, coagulation, pre-neutralisation, neutralisation, flocculation, sedimentation by a lamella separator and a final PH-value determination system. Furthermore, the required storage and buffer tanks and batchers were still existent. The outdated lamella separator had to be renewed and a gravel filter plant was added.

Impressions

Initially it was plant to reconstruct the plant during the winter holidays, as many different extensive procedures were to be performed. Just to name a few: modifications of the steel constructions, dismantling and assembly of peripheral plants and removal of the lamella clarifier with a heavy lifting device.

Due to exact operation scheduling already in the preliminary planning stage, Leiblein GmbH was able to perform the reconstruction on a single weekend, which meant less effort and costs for the car factory.

Autumn 2002 the reconstruction was then completed within only one weekend.

Treatment of liquid manure

The output of liquid manure of cattle, pork and poultry increasingly causes problems for fattening farms. Those companies often do not have sufficient space for the spreading of the liquid manure. This is particularly true for France, Netherlands, Belgium and Denmark.

Leiblein Gmbh planned together with the company Pro-Entec a compact system to treat the slurry.

Impressions
Utilisation of filter cake
  • Biogas plant
  • Composting
  • Other utilisation
Utilisation treated slurry
  • Direct discharge into canalisation
  • Irrigation
  • Service water
Advantages slurry treatment
  • Minimisation of transport costs
  • Small space required
  • Optimised for the use in biogas plants and for composting
  • Reduction of N-/P-/K-content
Advantages SlurrySep
  • Automatic operation, low workload
  • Compact, robust and wear resistant technology
  • No corrosion, as only stainless steel and PVC is used
  • Broad operating range, e.g. filtration of fermented substrate
  • Mobile use possible (can be fitted on a truck trailer)
  • Use of different filter-systems and filter-fleeces possible (vacuum assisted, continuous filter belt, filter-fleece)
Technische Daten
Raw liquid manure 
Solids content:ø 5 % TS

Volume flow inlet:

3 m³/h
Filter cake 
Solids content:20-30 % TS
Volume flow:0,8 m³/h
N-content:40 %
P-content:90 %

K-content:

20 %
Filtrate 
Volume flow:2,2 m³/h
N-content:60 %
P-content:10 %
K-content:80 %
  
Precipitant consumption:200-500 g/m³
Flocculant consumption:200-600 g/m³
Energy consumption:1,5-2 kWh/m³
Workload:ca. 0,5 h/d
Water treatment in a Koi fish pond

The company Koi Paradies Hohenlohe a specialist dealer for premium bred Koi-Carps had problems with the water quality in their ponds. Despite the use of filters, the water was not clear enough so that customers could observe the fish. Often it was necessary to feed the carps.

In order to increase the water quality a Leiblein inclined filter was installed. The separator removes turbidity material and algae from the water and ensures that the fish always swim in clean water and are good to observe.

Once more a non ordinary task was convincingly fulfilled by a Leiblein lamella separator.

Impressions
Exhaust-air wet scrubbing for a hay drying plant

Agricultural cooperatives use hay drying plants to be independent of weather. The exhaust air of a plant which is located in the Allgäu region is cleaned by a wet scrubber. The required washing water is treated with a Leiblein plant.

Impressions
Functional description

The plant basically consists of 3 components:

  • Rotation screen
  • Lamella separator
  • Dewatering container

At a rate of 40 m³/h water is continuously taken from the water circuit. In the first treatment stage the rotation screen sieves out the coarse fibers (> 1 mm). The fibres are exported into a dewatering container by a conveyor screw. The filtrate from the rotation screen flows into a lamella separator. Finest dust particle sediment in the lamella separator and settle into the sludge funnel. The sludge is exported intermittently and led into the dewatering container mentioned above. The clarified water from the lamella separator flows back into the water circuit.

Water purification in a zoo

In the zoological garden in Nuremburg a new outdoor enclosure was constructed. The attraction offers living space on three floors for sea lions, sea otters and penguins.

Impressions
Functional description

The water is treated, amongst others, by a Leiblein rotation screen and a lamella separator. The rotation screen removes coarse dirt particles (> 1mm) and the lamella separator removes fine particles in the 20 µm range.

Mobile lamella separator in action

The washing water from a sand washing plant is led into the lamella clarifier. Flocculant is added in a first process stage to support the sedimentation process in the clarifier. The settleable particles from the lamella separator are led into a belt filter press for further thickening. The clarified water from the lamella separator flows into a tank and can be reused.

The lamella clarifier can be assembled and disassembled in a little while and therefore can be used in combination with the belt filter press at another construction site.

Impression
Functional description

Lamella separators are used in situations where settleable particles have to be separate from liquids. Common fields of application of the mobile lamella separator are for example:

  • Vegetable / Sugar processing industry
  • Construction sites (mainly tunnel construction)
  • Environment remediation (water / soil)
  • Maintenance of wastewater treatment plants
  • Chemical industry
  • Process experiments with a prototype plant
  • Other temporary applications


Several sizes of the lamella separators are available at short notice. The separators are constructed, so that they can be assembled and disassembled without great effort. Smaller sized separators are immediately useable.

Beside the lamella separators many different additional systems and equipment are available. As for example:

  • Pumps
  • Pipes
  • Rabble rakes
  • Reaction tanks
  • Batchers for flocculant

Technologies for the solid/liquid separation Products of Leiblein