(Reliable|Safe) (garbage|refuse|litter|junk|waste|trash|riff-raff|rubbish|debris|rubble) (recycling|processing|utilization)

(The average|Every) German citizen (causes|produces|generates|is responsible for) (garbage|refuse|litter|junk|waste|trash|riff-raff|rubbish|debris|rubble) [of] about six to seven times the weight [of] his body (per annum|annually)(...|causes about six to seven times his body weight refuse per year).

(Currently|Presently|At present) about 30 millions tons of domestic waste (accumulate|produce) in our country annually as well as industrial waste similar to domestic waste and bulky refuse. That (amounts to|accounts for|accumulates to) about 460 kilograms (a|per) (capita|head). (About|Circa|Around|Approximately) 198 million tons of waste are added (by|from) the producing trade (...|198 million tons of waste from the producing trade add to that amount). This amount (is made up of|stems from|originates from) approximately 125 million tons of soil excavation and (debris|rubble) and about 5 million tons (of|originate from) industrial hazardous wastes. Eventually municipal (sewage treatment|purification) plants are the origin of still about 50 millions cubic metres sewage sludge (...|(Furthermore|Moreover) there is an additional 50 million cubic metres of sewage sludge).

(Mount trash is growing|The (rubbish|garbage|...) heap is (growing|becoming) larger and larger. (Hardly any new locations for dumpsites can be made available|New locations for dumpsites are almost not (available|at the disposal)). (What is to be done with our waste?|What to do with our waste?|So where could (we dump our refuse|the waste be put)?) The best solution is certainly: (avoid garbage or sort and recycle it|avoiding waste, or sorting and (recycling|reutilization)). (What about (the rest|the remainder)?|But what can be done with the rest?)

So far there were four disposal procedures: recycling, composting, depositing or burning. Two-thirds of the domestic waste, industrial waste similar to domestic rubbish and bulky refuse (are taken to|disembark on) the dumpsite. Nearly a third is incinerated and only 3 per cent are composted or are further processed.

Rubbish mountain on the descent

The carbonization-incineration process developed by the division KWU-environmental engineering is capable of utilizing housing-estate wastes, hence also the problematic sewage sludge, almost completely. In that process electricity and district heat are generated. There are three kinds of residues remaining behind: metals in purified form, glass and stones, that can be used e.g. when building noise-insulating walls as well as high (quality|grade) vitrified granules, that can be used environmentally neutral in civil engineering and in the construction materials industry. The process is a combination of smouldering and high-temperature burning, combined with a modern flue gas scrubbing system.

Utilization is the best waste disposal

Similar to a charburner that smoulders beech-wood in one charcoal kiln in the absence of air to charcoal, waste is degassed at first in a carbonization-incineration plant at 450°C without oxygen for one hour in a drum indirectly heated and slowly turning itself. In that process the two fractions carbonization gas and carbonization residues are created. Metals, glass and stones can be sorted out mechanically. The carbonization gas and the dust-like residue containing a high amount of carbon, are subsequently incinerated at 1300°C. This temperature offers the guarantee, that the (slag|cinder) becomes molten and can (solidify|freeze) to environmentally neutral vitrified granules. In that process the harmful chemicals are bound and cannot escape any more. What is more, at these high temperatures organic harmful chemicals are destroyed. Dusts from kettles and filters are led back into the high-temperature furnace and don't have to be deposited separately that way. The emissions of the installation after the flue gas scrubbing lie clearly below the legal (limiting values|limits).

The steam produced simultaneously because of high-temperature burning can drive turbines for generation of electricity or provide district heat for residential areas and public buildings or process heat for industrial plants. With the aid of cutting edge technology the energy- and residue content can be exploited up to the limits of (the|what is) possible.

Picture: The vitrified slag of the carbonization-incineration plant can be reutilized in the construction materials industry.