The cleanest, most environmentally friendly,        
safest and at the same time most cost-effective solution        
 is the purification of sewage/sewage sludge with the        

Blue Sewage System        








Waste Water Treatment


Our partner is a quality brand name for made-to-measure and ecological wastewater treatment plants as compact solution. They can look back on long term experience in engineering, production, installation and operation in the field of environmental engineering, especially in plant engineering and construction in the wastewater branch. Since 1983, they offer modular solutions for wastewater treatment of domestic, municipal and industrial origin.

The wastewater treatment plants are based on the rotating immersion disk technology (RID) that is characterized by high and stable biological purification efficiency. With our advanced wastewater treatment the client is well equipped for the future.

Offering tailor-made wastewater solutions which consist of modular standard components – efficiency and cost effectiveness are our main targets. The advances of the RID technology are the grade of reliability, the simple maintenance and the extremely low energy costs.

Our Partner has set itself modern quality principles and targets, which are followed in engineering and production. Highest priority is the client`s wish. This means that high efficiency has to be achieved, which is visualized using modern CAD-technology and quality management.






Our Partner is well positioned as middle size company in the international market. Sales and distribution outside Germany are organised.

Innovations in Biodisk-Technology:

The biocontactor technology has been used in wastewater treatment successfully since more than a hundred years. The special advantage of the bio-contactor is the fixing of the biomass on solid surfaces for biological growth which generally rotate half submerged in the wastewater. This allows high sludge ages to be reached, so that the biomass can adapt to specific wastewater conditions and lead to a remarkable reduction of the excess sludge production. We also uses this potential for the treatment of special wastewaters. Scientific research shows the special treatment efficiency of this technology. Even difficult wastewaters loaded with high polluting potential, such as high nitrogen contents, difficult biodegradable organic substances, or high mineral contents can be treated with high efficiency by the specially adapted biomass.

Due to this increased ability of adaptation from the biomass on the rotating immersion disks many other possibilities for applications in wastewater treatment are possible. These possibilities have been successfully achieved in cooperation with worldwide leading institutes. Based on the latest perceptions we are in the position to develop and optimize individual treatment technologies for specific wastewater compositions.


The Biological Treatment Step


In the biological treatment step, the dissolved and fine dispersed organic loads are converted into clean water and sediment solids through bacteria in an aerobe purification process. The sediment solid is often referred to as excess sludge.

In immersion disc plants, the biofilm situated on the growing surface is intermittently exposed to the atmosphere and the wastewater to be treated.

The aerobe biological treatment process leads first of all to the reduction of organic carbon compounds, described by the values of BOD5 and COD. Furthermore, the harmful and volatile ammonia nitrogen is converted into immobile nitrate nitrogen. This process is called nitrification. For both processes, treatment efficiencies of up to 99% can be reached. If the treated wastewater is re-circulated into an upstream reaction tank, denitrification can also be achieved. In this process, the carbon compounds of the reaction tanks detract the oxygen fixed in the nitrate so that the nitrogen can escape in elemental form.

The advantage of the aerobe biological technologies is the almost odorless process of the wastewater treatment.

We uses the rotating immersion disc technology for the biological wastewater treatment. This technology represents a combination of trickling filter and biological contactors. The rotating immersion disks provide the most energetically efficient technological process, as only the rotor with the biomass turns so as to keep mechanical abrasion minimal. For the dimensioning of the biological rotating immersion disk step, we follows the ATV-guideline A 281. For other climate zones, this guideline is appropriately modified thanks to the  experience of more than 30 years. Plants in which the required oxygen is brought into the wastewater via compressed air or surface aerators have an energy demand of 50% more than plants based on biodisk technology.

The high sludge age of the biomass achieved through the fixed film process used by  proves that the excess sludge production is up to 50% less.



Incineration of sewage waste



Incineration of sewage waste is increasingly becoming criticized because of:




          – high levels of dioxin and furans in the exhaust emissions

          – contamination of resultant ash by heavy metals

          – high costs for flue gas decontamination plants



Result: Incineration is no longer acceptable due to high pollution by emissions and contaminated ash. The thermal procedure has certainly a large range of application but compared to the ECOREFINE it requires approximately the triple power supply. Additionally the great expenditure for the purification of the flue gas causes far higher costs.

The biological treatment appears to be the more profitable one, but at least there is still rest sewage sludge.  That is why environmental offices in some countries already ban the dumping of rest sewage sludge on landfill, alternative, environmentally safe technologies are in demand.

Safe and environmentally friendly dispose of infectious sewage sludge.
Disinfection for germs & Bacteria

Guaranteed sterilization of infectious rest sewage sludge can only be achieved by taking place prior to thermal vacuum treatment, a part of the Blue Sewage system.  Liquids contained in the waste are not a problem for the purifying process, not one germ survives.Due to its compact modular design, the ECOREFINE System has a throughput rate from  300 kg up to far more than 1000 kg per hour.

Unique System

 Create a green landscape





Special fertilizer for trees and the lawns, water saving irrigations system and the results of the waste processing ECOREFINE.   


Employing mineral fertilizers in the cleaned ECOREFINE compost replaces everything that plants have taken from the soil with the exception of Humus.


However, Humus is the only guarantee for healthy growth, freedom from noxious agents and continuous fertility. With the above mentioned method you can change the desert into farmland, reducing on the same time leftover food (Hotels restaurants, private), green cutting etc.


Contaminated Sites:

Microbiological soil and land rehabilitation, MBA from residual waste. Revitalization and regeneration of subdued, (Ecorefine) cleaned, decontaminated soils and substrates, sewage, sludge, digest.



Composting of areas:

Agriculture, gardening, private garden, fruit growing, cultivated pasture.




Deep litter, droppings, manure, horse boxes, small scale farming, and poultry- farming.



Lawns, golf courses, parks-resources, lawn, nature reserves, water protection areas.



above: sand, ecorefine- compost, clay flour



middle: sand, irrigation layer



below: eco-compost, pellets



Municipal and

Industrial sewage sludge

A pelleting plant installed by KAHL PRESS has been in operation for several years and is controlled automatically from a central switch plant. All operating data of the plant are gathered there and the corresponding reports are printed out.

Due to the automatic operation, operating phases of about 3 months are possible. During this time the pelleting plant is operated unattended.After 3 months the regular preventive repairs are carried out, before the plant is set in operation again.

The bulk density of the sewage sludge pellets is about 800 kg/m3. The dust content is very low with < 1 % referred to a dust particle size of < 0.5 mm. All other fines do not cause dust nuisance during further treatment. Under regular operating conditions the pelleting elements have a service life of 1,500 to 2,000 hours.

All safety regulations are fulfilled. The highest circumferential speed is 2.5 m/s and the surface temperatures are far below 120 °C. Consequently fire risks in the plant can be excluded.

Pelleted sewage sludge

Pelleted sewage sludge is demanded more and more frequently in tenders, as the subsequent treatment of a compacted, dustless final product is more efficient. This applies to the transport, the use as cover material in agriculture, or the thermal utilisation.

For pelleting the sewage sludge which is pretreated in whatever manner,a solids content of 60 to 95 % is required. This content is achieved by means of dehydration and subsequent thermal drying or by a combination of both processing steps. The pretreatment of the sewage sludge in a digestion tower has a positive effect on the capacity of the pelleting press as well as the wear of the pan grinder rollers and die.

With a solids content of 60 % less solid pellets are produced than with 90 %. The solids content chosen depends on the further use of the sewage sludge. The machines to be used are determined by the variable percentage of organic substances and the lowest pH value.
In case of a high percentage of organic substances the dried sewage sludge has a high volume and can only be proportioned into the press by means of special devices due to is bulk density of 150 - 200 kg/m².

Besides, grinding will be required be-fore pelleting. In case of the flat die pelleting press used by PRESS, grinding is effected by means of the cylindrical pan grinder rollers which rotate on the die. For this reason the PRESS pelleting system is particularly appropriate for the above-described product, as it can be adapted without problems to varying organic contents.

Producing Humus - Humus blocks or plant pots, which means saving up to 80%  of water for irrigation

Cross Section Soil Treatment Trees







Humus-Blocks, saving up to 80% of irrigation water.


Drip pipe for flowerbeds, shrubs and trees. 








Minerals and nutrients laid in the eco- compost are not yet available for the plants,
therefore bacteria and water are added to start the process of biological activation









above :

sand / ecorefine-compost clay flour



sand/irrigation layer


below: eco-compost/pellets 


Below and Above Ground Drip Irrigation-

the Innovation in the drip irrigation market



Below and Above Ground Drip Irrigation –

the innovation in the drip irrigation market


Can be installed below ground, out of sight

For water conserving drip irrigation of beds, borders and lawns

The benefits of the drip head:


Self-sealing, so no dirt collects when the system is switched off. Pressure compensated, for even watering up to 200 m; ideal for sloping areas.Self-cleaning with membrane / labyrinth technology for maintenance-free operation, with root barrier mechanism

Cross section lawn & beds

(High grade fertilizer)

(owerbeds, shrubs & trees)

 (Humus blocks, saving up to 80% irrigation water)

Every drop counts...


The Blue Building sewage treatment, it is not only a healthy system

……recycling on the same day
……greening landscape and the city
……saving 50 % energy
……up to 80 % water for irrigation
……small space
……no smelling
……no pollution
……outstanding results



it will be amortized already after 75 month




"The Blue Building principle of cost benefit ratio shows serious results based
on available sustainable methods and general understanding.
The Blue Buildings will save huge amounts of energy and costs.”


- Calculation upon request -