Consulting on Environmental Technology

The solution of special environmental problems like the biological removal of complex pollutants such as AOX, pesticides, nitrogene, etc. requires
  • very specialized knowledge and
  • practical experience in these fields, which is usually not widespread,
especially for the
  • correct analysis and diagnosis of problems,
  • negotiations with authorities
  • planning, development and valuation of process alternatives and
  • realization of problem solving projects.
Environmental Technologies
show some essential differences compared with conventional chemical processes, influencing remarkably development and design:
  • fluctuating flow rates and loads,
  • fluctuating concentrations and kinds of pollutants,
  • while the „final products“ should have constant quality (low degree of pollution).
Because of these peculiarities it is virtually not possible to “copy” environmental bioprocesses unchanged from one application to the other, they are adapted to every particular case by
  • experimental determination of basic process data and relating
  • process design individually case by case.
The transfer of already realized solutions is only recommendable for a limited number of standard cases.
Risks and failures can be avoided by

Practice related experimental work with several targets like
  • determination of biodegradability of pollutants under simulated commercial plant conditions,
  • optimization of process parameters for single steps of treatment processes,
  • improval of the efficiency and stability of the processes in existing plants and
  • comparison and judgement of process alternatives.
Decisive condition for the success of such experimental work is a correct conception of the tests, with following MILESTONES:
The expenses for such experimental work are usually representing a very small part of the total investment for a full scale plant, but the basic data achieved in the tests offer a remarkably higher reliability and reduced risks of failure in the design. Further they can contribute to lower the investment by up to 40%. Therefore, such experiments and the information gained are essential for an optimal problem solution.

aerobic plant

1,0 L aerobic plant

anaerobic plant

2,0 L anaerobic plant

Laboratory scale plants for continuous biotreatment tests

Selected reference pilot scale projects (partially realized also commercial scale*):
Anaerobic-aerobic treatment
  • Anaerobic treatment of landfill leachates of the city of 300.00 E.I.*
  • Anaerobic-aerobic treatment of toxic pulp mill bleaching effluents by immobilized organisms*
  • Anaerobic-aerobic treatment of chemical effluents, rich in aromatic and organohalogenic (AOX) compounds
  • Anaerobic-aerobic C+N-elimination from agrochemical effluents by immobilized organisms*
  • Anaerobic treatment of chemical effluents, rich in sulphate (COD:SO4 ~ 0,3)
  • Biodegradation of diazo- and phtalocyanine dyestuffs and their intermediates (substituted aromatic sulfonic acids)*
Nitrification-denitrification of complex effluents
  • COD- und TKN-elimination from landfill leachates of the city of Cologne *
  • Simultaneous aerobic Nitrification and Denitrification of NH4N-rich municipal sludge processing effluents
  • Nitrification of high-saline (~ 45 bis 55 g/L NaCl) chemical effluents by immobilized organisms
  • Effect of enhanced salinity in chemical effluents, on the bio-degrading performance of biomass*
  • Decentral detoxification of a single stream, containing arylamines (inhibitors for nitrification)*
  • High-efficiency-nitrification of effluents from the production of pharmacy grade gelatine
  • Nitrification of NH4N-rich effluents from the production of dyestuffs by immobilized organisms
Biotreatment of waste gases
  • Biological treatment of CS2 and H2S containing waste gases of the Chemical Industry (fungicides and foils) in a bio-trickling-filter (BTF)*
  • Biotreatment of waste gases, containing toluene, dichlormethane and active substances from the production of agrochemicals in BTF*
  • Indoor biological wet filtration of air in a storage hall for plastic wastes, polluted with sporogenic bacteria and micels of fungus.*
Biotreatment of sludges and soils
  • Bioremediation of AOX-rich soils of a chemical site using selected mixed cultures
  • Enzymatically supported digestion of municipal sludges*
This side is part one Framesets