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    Sewer / Biological Treatment Systems

    Most photographic processing effluents and wash waters contain chemicals that are biodegradable. They are, therefore, compatible with aerobic (with oxygen) biological treatment systems and are effectively treated when sent to an efficient sewage treatment facility. Permission from the local treatment authority may be needed (a written consent or permit is usually needed and limits what can and can't be discharge). Contact your local authorities to see
    if you need consent and to determine local discharge limits.
    Kodak strongly recommends that you never pour silver-bearing effluents such as used fixers,
    bleach-fix or stabilizers down the drain. Rather you should use on-site or off-site silver recovery.
    For unused chemistry, please refer to the products Material Safety Data Sheet (MSDS).
    On-site Silver Recovery
    Off-site Silver Recovery
    Requirements for Industrial Sewer Discharges Containing Hazardous Waste