Das BIOPUSTER® Verfahren
Even many decades following their closure, dumpsites generate odor-intensive, in part highly poisonous and explosive gases as a consequence of anaerobic biochemical processes of decomposition, and therefore turn into problematic lasting nuisances . Furthermore, precious groundwater is disturbed by water seepages draining uncontrollably from unsecured dumpsites and contaminated grounds. They therefore represent an endangerment to Mankind and the environment.
We have therefore made it our business to develop a process that will solve this problem economically and without further burdening Mankind or the environment.
The patented BIOPUSTER METHOD is the result of intensive research and development operations. Through the intermittent, explosion-like influx of air and oxygen, the body of waste is fully transformed from an anaerobic to an aerobic state. Water and nutrients can be added when needed. Thus, through a rapid rotting process low in emission, it becomes possible to bring many areas of the waste problem under control in a natural way.
This process is in many cases justified economically by the gain in dumpsite volume depending on the process used. Up to 50% more dumpsite volume can be achieved. That is an advantage not to be ignored, since the locating of new dumpsite places is becoming more and more difficult.
Additional Use Options
The BIO-PUSTER METHOD, however, offers yet further options for successful use:
- Treatment of residual waste
- Treatment of biological refuse in composting plants, where the increasing quantities of green cuttings or from biological garbage containers otherwise turn into a problem.
- "In situ" treatment of organically contaminated grounds
As already mentioned, anaerobic processes of decomposition in the body of waste take a great deal of time, and furthermore involve the development of odor-intensive, in part highly poisonous gases and heavily polluted water seepages.
On the other hand, aerobic decomposition procedures run quickly and without harm to the environment.
In principle, it is only necessary to introduce sufficient air or air enriched with oxygen into the body of waste or polluted ground, and to distribute it as evenly as possible.
The BIO-PUSTER METHOD makes an "in situ" rehabilitation possible, meaning that the body of waste or the contaminated ground can remain right on spot. Through the explosion-like shooting in of air as well as of air mixed with oxygen and, if needed, also with water or nutrients when simultaneously suctioning off gaseous metabolic products, such a steady supply of oxygen and nutrients is achieved in the entire reaction zone that speeds of decomposition hitherto not considered possible can be attained.
Compared with conventional methods, such as continuous aeration, a number of benefits can be achieved, such as
- Equal distribution of the introduced air
- Well-controllable dosage of oxygen enrichment
- Well-controllable dosage of water and nutrient supply
- Natural decomposition of pollutants and poisonous gases
- Avoidance of undesirable odor emissions
- Aimed removal of dumpsite gases
- Considerable reduction of the pollutant load on dumpsite waters
- Economization of dumpsite volumes
- Shortening of rotting times
- Considerable savings in cost
With continuous aeration and/or suctioning off, what actually happens, due to the scant gas pressure achievable of 0,1 to 0,2 bar, is merely a convective exchange of gases along large crevices and canals, while in densly packed regions no convection is possible, and thereby no aerobic metabolic processes, either. Moreover, the zone where oxygen is introduced becomes limited to just a very small volume all around the pressure lances.
Usual expansion in the area of the lance
Spherical expansion through aeration with an explosion-like wave.
Using the BIO-PUSTER METHOD, pressure thrusts are produced in single impulses, which diffuse from the specially shaped pressure lance tip at the speed of sound. The spherical pressure wave penetrates dense as well as loose layers equally.
Moreover, even saccular cavities are supplied with oxygen through the compression effect of the spherical wave.
By varying the distances between the pressure and suction lances, it will be ensured that the entire aeration body will participate in the rotting.
In order to guarantee an optimum supply of oxygen, the air shot in can be enriched with oxygen, such that even in aereas with high consumption sufficient oxygen will still be available.
Suctioning Off of Dumpsite Gases
The uncontrolled escape of gaseous metabolic products is impeded by a pressure gradient with respect to the atmosphere. The BIO-PUSTER METHOD provides a most capable suctioning system with a suctioning capacity at least 30% higher than the blasting capacity of the Pusters.
Moreover, the emission of stray gases in the decomposition zone as well as from buildings and in the fringe region of aerated zones is also hindered by a suction curtain made up of relatively tightly arranged suction lances.
The gases suctioned off will, in the normal case, be conducted to a generously dimensioned biofilter. Substances difficult to attack biologically can be catched in activated charcoal filters, as the need arises.
Compressed Air an Oxygen Plants
The compressed-air plant consists of compressors and compressed-air vessels and an oxygen plant with fully automatic measurement and regulation passages. Thus, the compressed air is enriched with up to 20% oxygen in a mixing device.
The compressed-air pipes network consists of a main pressure pipe system as well as of subsidiary pressure pipe system.
The main component of the BIO-PUSTER is a rapid ventilation valve, which releases the entire PUSTER contents explosionlike over the discharge opening of the pressure lance, as soon as the preset air pressure has been reached. The shooting frequency is set using a frequency-regulator valve. Water and nutrients can also be supplied through additional equipment.
The suctioning system consists of a water ring pump similar to that also used in mining, of a water seperator, a spray water cooler, an air blaster for aerating the biofilters, the biofilters themselves and any activated charcoal filters which might prove to be necessary.
For safety reasons, the suction pipes are designed in such a way that any methane gas explosions that might arise can certainly be withstood. As material, PE-HD tubes are used for reasons of corrosion protection. Moreover, explosion flaps and drainage valves are available in the pipes.
All pipes are suspended from tripod stands, to be able to adapt to the features of the terrain.
All pressure and suction lances are rammed into place according to the underground makeup, or planted into drilled holes and sealed off.
The area to be aerated is usually subdivided into fields. The pressure and suction lances are arranged in grids.
Relocation of existing Waste with Odor Stabilisation
Odor stabilisation using the BIO-PUSTER METHOD is the basic requirement for a safe and environmentally tolerable relocation of a dumpsite, and serves as pretreatment for the relocation.
Since household garbage and other refuse heavily saturated with organic components are subject to a process of putrefaction, this gives rise to poisonous, exploisevely dangerous and evil-smelling gases, which can be neutralized by using "in situ" aeration with the BIO-PUSTER METHOD.
The following benefits are achieved thereby:
1. Unendangered Decomposition
When opening up the dumpsite, no explosive gases or bothersome odorous substances will escape. Suction curtains prevent stray gases from escaping out of untreated zones as well as out of the removal aerea. Nearby residents will not be bothered. The staff can also work unendangered and without hindrance.
2. Good Sortability
Due to the negligible moisture content, the odor-stabilized waste can be separated very well into individual grain classes using a conventional sifting plant. The 0-50 mm sifting run can be compressed into a density of 1,7 t/m3.
3. Gain in Volume
Through a relocation of the dumpsite, with the corresponding waste sortage and reintegration of the residual waste using a thin-layer technique, the volume of air pores will be minimized. This means that the service life of the dumpsite can be nearly doubled because of the volume subsequently available.