Home Health Best practices for environmental health : environmental pollution, protection, quality and sustainability
Rotating Biological Contractor Systems
These systems have rotating plastic discs on a horizontal shaft that are submerged about half way within the effluent. This allows the aerobic bacteria on the discs to be exposed to air and wastewater to help improve the effluent.
Suspended Growth Method
In this system, the effluent is circulated rapidly and agitated within an anaerobic chamber to encourage the digestion of the biodegradable substances. Changes in flow or the solids affect the system. This may result in the incomplete settling of the solids.
Activated Sludge Technology
This is a variation of these suspended growth systems which combines aerobic and anaerobic processing in a single unit. They operate in alternate sequences.
Membrane Bioreactor Method
This method improves the performance of the suspended growth method by using membranes as super clarifiers filtering the microscopic solids and even some bacteria.
The membranes can be damaged by air or stringy or abrasive materials which have a fine diameter. The membrane filtration works faster in clarifying the effluent than the settling process. This should leave salt and relatively less sludge for disposal. The membranes must be cleaned regularly to prevent problems that could cause loss of permeability.
Best Practices in the Use of Other Advanced Treatment Systems
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