Translation of "Faulgas" in English

We process digester gas carefully to ensure the optimal use of energy

Its crude nature renders this digester gas timeless and pretentiouslyunrealistic.

Sludge gas, which is often also called sewer gas, is evolved in the anaerobic treatment of sludge.

For this biogas to burn well, the methane content must be as high as possible.

Instead of being burnt off, the biogas can be recovered and used to generate power.

Here, fermenting in a series of digesters is a mixture of microbes that creates biogas from the organic materials.

Waste water treatment at the sewage plant produces irrigation water for agricultural use, water for artificial groundwater replenishment and also fermentation gas.

With the addition of heat energy, the decomposition of the sludge's organic components produces thermally usable digester gas.

They convert CO2 into biomass and oxygen, thus enhancing the concentration of methane in the digester gas.

Anaerobic bacteria break down the sludge into fermentation gas, water, and sapropel.

An apparatus for conducting the process comprising at least one reactor with an inlet for wastewater, an outlet for treated wastewater, as well as an exhaust conduit for sewer gas, and a carrier material for anaerobic microorganisms arranged within the reactor, the carrier material being the macroporous materials having a low density as previously described.

At the upper end of the reactor 1, an exhaust conduit 6 is provided to withdraw sewer gas produced during the anaerobic process, and a feed conduit 7 is also connected to this upper end for the introduction of sodium hydroxide or other alkaline compounds to adjust the pH value.

A process for the treatment of wastewaters heavily polluted by fats, proteins and/or carbohydrates of vegetable or animal origin or their processing products by degradation by microorganisms in a continuous flow reactor without separation of fats and/or sludges, comprising passing the wastewasters through a first part of a reactor containing aerobic and anaerobic microorganisms to consume the free oxygen present in the water, with at least partial degradation of the pollutants to fermentation products, and on flowing through another, adjoining part of the reactor, the fermentation products and any pollutants still present are coverted in the presence of the anaerobic microorganisms into--predominantly--digester gas and biomass.

Moreover, it is, as a result of using a tortuous path such as a coiled path, possible to prevent the digester gas, which develops because of the decomposition processes even during the upflow, from vertically rising to the top in a direct path and from carrying suspended biomass directly upwards due to a flotation effect.

The device for conducting the process of the invention comprises a reactor constructed for operation in an essentially downflow mode under anaerobic conditions. The reactor contains a filter bed arranged therein which serves as a carrier for settling of microorganisms. The reactor includes a feed pipe or inlet for the above mentioned substrate to be treated, an outlet for treated substrate, a gas outlet for digester gas and a return or recycle pipe or conduit from the bottom to the top of the reactor.

By this arrangement not only is the rising path of the substrate from the reactor bottom to the outlet in the upper area of the reactor lengthened, which improves the effectiveness of the decomposition and of the sedimentation in this area of the reactor, but also at the same time, in the decomposition or degradation processes, the digester gas developing in the riser pipes during the upflow is prevented from rising vertically in a direct path. Thus, a flotation and discharge movement of the unfixed biomass caused by such a rise of gas is at least restricted.

In addition, in the corrugated and/or ribbed design of the inclined or coiled arrangement of the rising pipe, the developing digester gas may accumulate in the respective recesses of the riser pipes.

The digester gas developing during the anaerobic decomposition process is carried off by means of a gas outlet 9 provided at the top of reactor 1, while treated substrate is drawn off through outlet 10.

As a result of designing the riser pipe 11 to be open on the top and the overflowing of the treated substrate from riser pipe 11 passing into receiving tank 12, it is possible to discharge developing digester gas upward during the rising phase through the riser pipe 11.

The project of the “ASKI” aims at installing a cogeneration plant, fueled with sewage digester gas originating from the central sewage plant at Ankara (Turkey).

The operating data include the annual overview data (load and cleaning performance, auxiliary materials, residues, characteristic values), the measurement data of the monthly values (infeed, effluent, denitrification, nitrification, loads, electricity consumption, sludge treatment, digester gas, etc.) as well as the performance data (effluent, infeed, COD, Nges, Pges)

The benefits of using AD are clear and within the near future, technology will permit us to upgrade digester gas to natural gas quality.

However, environmental conditions such as large flow dynamics, water-saturated biogas, changing methane concentration and extremely low pressure make measuring these parameters difficult for most devices.

As waste process gas from WWTP Reinach is now treated and fed into the gas grid, it can no longer be used for heating the plant.

The Emschergenossenschaft was one of the first of the major operators of waste water treatment plants in Germany to decide to test and further develop the conversion of digester gas into natural biogas and hydrogen in a pilot project at the Bottrop waste water plant.

Increasing the energy efficiency of aeration tanks and using sludge or digester gas to generate energy and heat are not the only measures on the road to the water treatment of the future.

The sludge in the digesters is used to produce biogas, from which a current of up to 12 MW can be generated.

In this connection, reduction of dry organic matter, improvement of dewatering, reduction of pathogens, and extraction and utilization of digester gas results as secondary effects.

Surprisingly, it has now been shown that separate treatment of hydrolyzed excess sludge on the one hand and primary sludge on the other, in particular at digestion times less than 6 days, causes a higher production of digester gas or methane than the generally conventional joint anaerobic treatment of hydrolyzed excess sludge and primary sludge.