Biological treatment systems, such as activated sludge, biofiltration to remove/degrade the organic compounds

All processes directly or indirectly linked to the process units blast furnace, hot metal treatment units, blast furnace blowers, blast furnace hot stoves, basic oxygen furnace, secondary metallurgy units, vacuum ladles, casting units (including cutting), slag treatment unit, burden preparation, BF gas treatment unit, dedusting units, scrap pre-heating, coal drying for PCI, vessels preheating stands, casting ingots preheating stands, compressed air production, dust treatment unit (briquetting), sludge treatment unit (briquetting), steam injection in BF unit, steam generation ...[+++]plant, converter BOF gas cooling and miscellaneous are included

This method describes a laboratory model of the activated sludge + secondary settler which is designed to simulate municipal sewage treatment.

Failure to pass the activated sludge simulation biodegradability test would indicate potential for the release of the metabolites by sewage treatment, which may be considered, in general terms, as evidence of need for a more complete risk assessment.

Membrane bio-reactors have several environmental advantages over conventional activated sludge plants: they remove recalcitrant micro-pollutants more effectively and they reduce the amount and toxicity of the resulting sewage sludge.