Handbook of biological wastewater treatment : design and by Adrianus Haandel, Jeroen Lubbe PDF

By Adrianus Haandel, Jeroen Lubbe

Instruction manual of organic Wastewater therapy: moment variation bargains with the optimized layout of organic and chemical nutrient removing. It provides the cutting-edge idea in regards to the a variety of facets of the activated sludge procedure and develops strategies for optimized rate established layout and operation.

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Additional resources for Handbook of biological wastewater treatment : design and optimisation of activated sludge systems

Example text

A primary settler (or primary clarifier) may be introduced to remove part of the suspended solids present in the influent. This reduces the organic load to the biological reactor. The settled suspended solids (“primary sludge”) are often sent to an anaerobic digester, together with the activated sludge that is discharged from the biological reactor: the excess sludge. In the anaerobic digester, the volatile suspended solids in the excess sludge are partly degraded, in the absence of oxygen, into methane and carbon dioxide.

G. the SHARON process) is an example of such a new process. The reactor is operated under conditions where the second nitrification step, oxidation of nitrite to nitrate, is not allowed to occur. The advantages are: (I) a reduction in oxygen demand and (II) a reduction in the consumption of organic material. The latter is an advantage as many wastewaters contain insufficient organic material for complete nitrate removal. A second innovation is the process of anaerobic ammonium oxidation, where a recently discovered bacterial species (Anammox) is used to remove ammonium, using nitrite as the oxidant instead of oxygen.

The liquid leaves the system as treated effluent, whereas the sludge is recirculated to the aeration tank and for that reason is called “return sludge”. A primary settler (or primary clarifier) may be introduced to remove part of the suspended solids present in the influent. This reduces the organic load to the biological reactor. The settled suspended solids (“primary sludge”) are often sent to an anaerobic digester, together with the activated sludge that is discharged from the biological reactor: the excess sludge.

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Handbook of biological wastewater treatment : design and optimisation of activated sludge systems by Adrianus Haandel, Jeroen Lubbe


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