Water Technologies and Solutions LLC has the necessary know-how to design suitable waste treatment processes for different types of waste that can considerably contribute to saving our resources. Our plant technology focuses mainly on the digestion of organic waste fractions, yet equally involves using components which help to produce regenerative energy or can treat excess process water.
In a very early process stage the waste stream is split into an organic rich waste fraction, subject to anaerobic digestion and an overflow fraction, subject to sorting and recycling.
As we know today the anaerobic methane digestion is running on three phases under participation of different groups of microorganisms. It must be emphasized that all degradation steps occur simultaneously at the same time in the digester. All groups of bacteria live together in a tight symbiosis. To achieve a complete anaerobic degradation of organic material each group of bacteria must be working as they are strongly dependent from the intermediate products of another group.
Consequently from both the reaction kinetic point of view and the process point of view Water Technologies and Solutions LLC strongly recommends the single step wet digestion carried out as intensified digestion with proper mixing, very low temperature gradient and very low concentration gradient which supports the bacteria symbiosis and guarantees highest biogas yields.
Furthermore hygienisation can be achieved by a thermophilic wet digestion.
The fine fraction is fed to the feed preparation tank where it is transformed into a liquid suspension by adding process water coming from the
dewatering equipment and clean water.
The feed preparation process is operated continuously. One of the most important features at this stage is the unique opportunity to separate the mineral fraction containing sand, stones, glass, ceramic etc. from the organic suspension which is fed to the digesters with feed preparation system.
It particularly is very important for industrial scale bio-waste treatment processes to remove minerals which are contained in the waste in considerable amount and could cause serious damage such as sand blockages, wear and tear of pumps, pipes and valves if they were not properly removed.
This very important feature of heavy reject separation is performed by a special backwashing and heavy rejects removal procedure, which is periodically applied and embedded in a continuous feed preparation process. The heavy reject separation must be followed by a wet digestion process.
The fertilizer can be used to improve the soil. A special characteristic is that it can hold water over a long period. Degradation during fermentation is sufficient to produce a fresh bio-solid product, which can be utilized for agricultural purposes, or for land reclamation. The stabilized product can be marketed for horticultural, agriculture, forestry and gardening purposes.
The stabilized fertilizer can also be used without any dewatering as a liquid fertilizer.
Perspective on Waste Treatment:
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