Efficient, compact effluent treatment plants with minimised sludge generation

Profil Titel	Efficient, compact effluent treatment plants with minimised sludge generation
Referenz	07 DE NRXE 0J1F
Herkunftsland	Germany
Kooperationsart	Angebot
Eintrag/Änderung	2007-11-05 / 2007-11-05
Status	Dieses Profil ist abgelaufen! Falls Sie denoch Interesse haben, kontaktieren Sie uns. (2008-10-21)

Kurzfassung

A small German company offers compact plants for efficient biotreatment of effluents containing complex pollutants, by means of a specialised problem-tailored biomass immobilised on an innovative adsorbing carrier material. This process results in higher pollutant removal efficiency and process stability, and lower excess sludge production. Applications are in municipal, industrial and groundwater treatment. Partners are sought for licenses, joint ventures or technical co-operation.

Details

Conventional Compact Waste Water Treatment Plants (CWWTP) are efficient; however, they require too much energy for aeration and produce too much excess sludge, treatment of which is expensive. A small German company developed a solution and offers a high-performance CWWTP, realised as fluidised bed reactor, with integrated clarifier and highly efficient fine bubble membrane aeration using adapted microorganisms immobilised on 12 vol.% of porous, adsorbing, easily fluidised carrier cuboids.
The mechanically pre-treated effluent will be treated under aerobic conditions by immobilised microorganisms, whereby COD and ammoniac nitrogen will be oxidised nearby completely. Under special conditions the produced nitrate can be converted simultaneously into molecular nitrogen (simultaneous de-nitrification under aerobic conditions). The immobilisation of the biomass results in a remarkably lower generation of excess sludge.

The efficient biotreatment of effluents containing complex pollutants comprises of several factors. Based on detailed analysis of the effluents and knowledge of wastewater matrix (structure and concentration of organic and inorganic pollutants) a specialised biomass can be designed, optimised and applied for biotreatment.
Immobilisation of the biomass on special adsorbing polymeric carrier material and plant operation in fluidised, expanded or fixed bed reactors result in remarkably higher pollutant removal efficiency and process stability, and lower excess sludge production. Due to the simple technique for carrier retention, existing classical activated sludge plants can be upgraded easily into plants with more efficient and stable processes (for example nitrification at lower temperatures), avoiding expensive plant extensions.

Innovative Aspects:
The immobilisation of biomass on adsorbing carrier results in:
- Faster and better build-up of the „biology“.
- Buffering of toxic effects.

The increase of biomass concentrations results in higher:
- Process stability.
- Volume-time-yield.
- Sludge ages.

The advantages of the carrier:
- Considerably lower degree of filling of the reactor with the carrier material with comparison to similar techniques.
- Existing reactors can be upgraded easily.
- Optimal mass transfer within the carrier cubes.
- Simple retention of the carrier in the reactor.
- Special sludge removal from carrier is not required.
- Lower energy consumption.
- Sufficient oxygen input.
- Simplicity and easy operation.