Sewage sludge digestion treatment

Anaerobically digested fresh sewage sludge (municipal treatment plant, Nabereznie Chelni) 0.7 0 4 33 Low hazard... 

This process is an extension of the anaerobic treatment of waste diseussed in Chapter 2, and is also similar to the natural process operating in landfill sites, which evolves methane. By treatment of biomass with bacteria in the absence of air a gas rich in methane can be produced a typical digester may produce over 300 m of gas containing over 50% methane per tonne of dry biomass. The economics of biogas generation for use as a fuel are currently unfavourable. The plants that do exist have been built because of the need to treat waste such as sewage sludge. 

HYAN [Hybrid anaerobic] A process for treating the supernatant liquor from sewage sludge treatment plants by anaerobic digestion. The methane produced is burnt to provide heat for the treatment plant and to destroy odors. Developed by a Canadian consortium and operated at the Lakeview Water Pollution Control Plant, Mississauga, Ontario, from 1991. 

Few data have been published on cationic surfactants in aquatic sediments. Levels from 3 to 67 mg kg-1 were determined in sediment samples from Rapid Creek [54] and 6-69 mg kg-1 concentrations were found in sediment samples from Japan [4]. DTD MAC was reported in digested sewage sludge at levels ranging from 0.15 to 5.87 gkg-1 [22]. Also, cationic surfactants were determined in urban coastal environments and they were reported as markers [18,55]. In our work, concentrations of BAC ranged from 23 to 206 p,gkg 1 in sediment samples from different rivers near to wastewater treatment plants,... 

Scheminski A, Krull R, Hempel D C (1999) Oxidative Treatment of Digested Sewage Sludge with Ozone. Proceedings of the Conference Disposal and Utilisation of Sewage Sludge Treatment Methods and Application Modalities , IAWQ, 13-15 October, Athens, 241-248.

In practice, unfixed disperse dyes discharged from spent dyebaths to waste-water treatment plants are easily eliminated by coprecipitation with the sewage sludge and may be anaerobically degraded in the digestion process. 

This chapter presents an overview of sample treatment procedures [e.g., decomposition, digestion, mineralization, oxidation, ultraviolet (UV) decomposition, and ozonation] and discusses a range of analytical techniques for the mineralization of natural aquatic systems. Other samples, such as effluents and sewage sludge, are beyond the scope of this contribution and will not be discussed here. 

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