thermophilic digester Articles
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Floating Cover-China - Case Study
" We have Thermophilic digested biological sludge, digested at 55 degrees. This is done in the digester, from which the sludge is fed to a open storage tank. Subsequently the sludge is dewatered, and the water from the dewatering is led to an "Anita Mox' process. This process should preferably stay above 18" degrees, so it is important that the temperature does not drop too low in the storage ...
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A comparative perspective of US and UK thinking on e-coli reactivation in digestion and dewatering
Since 2003 a number of WWTPs have observed elevation of E Coli densities following dewatering of digested sludge by high solids centrifuges, mainly in the US. A recent study by WERF shows that this applies to 4 out of 7 facilities studied in detail. A review of all the literature shows that the phenomenon occurs in 31 out of 33 facilities and includes those with thermophilic digestion or ...
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Anaerobic thermophilic digestion of sewage sludge with a thickened sludge recycle
The process of anaerobic thermophilic digestion of municipal wastewater sludge with a recycled part of thickened digested sludge, was studied in semi-continuous laboratory digesters. This modified recycling process resulted in increased solids retention time (SRT) with the same hydraulic retention time (HRT) as compared with traditional digestion without recycling. Increased SRT without ...
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Two-phase anaerobic digestion for class a biosolids at moccasin bend WWTP
The Moccasin Bend Wastewater Treatment Plant (WWTP) provides treatment for the City of Chattanooga, Tennessee and the surrounding region. The City has completed upgrades to the solids handling facilities to treat and dewater the primary solids and waste activated sludge (WAS) from the WWTP. This paper summarizes the process to handle the primary solids and the start-up process. Primary solids ...
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Hias IKS - Hamar - Case Study
Client: Hias IKS Solution: CambiTHP HIAS, Hamar The HIAS wastewater treatment plant serves the city of Hamar and several smaller villages in the area around. It is dimensioned for a population equivalent of 90,000. In 1995 Cambi built its first full-scale thermal hydrolysis installation at HIAS as part of a new sludge treatment process including hydrolysis, digestion and dewatering. It has ...
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The energy factory - producing energy, nutrients and clean water from sewage water
Conventional sewage treatment: Sludge line: 20 kg DM IE year to sludge; 1.500.000 tons sludge per year Sludge treatment and disposal: 40% of STP opex average cost € 330 / ton sludge (incl. dewatering and processing costs) Traditional (mesophilic ) sludge digestion: Prim. sludge / sec. sludge = 50 : 50 Hydraulic Retention Time 20 days Average yield: 25 – 40% ...
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Innovative approach to centrate nitrification accomplishes multiple goals: nitrogen removal and odour control
In 2001, the City of Phoenix, Arizona (USA) committed to the conversion of the existing high-rate anaerobic digestion process at the 8.9 m3/s 91st Avenue Wastewater Treatment Plant (WWTP) to a multi-phase process (acid/methane, mesophilic/thermophilic) to optimise existing digestion capacity and achieve Class A biosolids. The improved solids reduction is anticipated to double the ammonia load in ...
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