Effect of hydrodynamic disintegration on the solubilisation and bioavailability of thickened excess sludge

Effect of the arrangement of cavitation generation unit on the performance of an advanced rotational hydrodynamic cavitation reactor

“…HC phenomenon, discovered by Euler [5] in water wheels as early as in 1756, is a rapid phase-change phenomenon, including formation, growth, and collapse, triggered by local pressure change [6] , [7] , and releases tremendous energy into surrounding liquids, creating unique reaction environment with local high pressures and temperatures and strong oxidation/reduction effects [8] , [9] , [10] . The sonochemical effect induced by HC has been widely investigated and applied in various chemical and environmental applications in the past 30 years: degradation of organic matter [11] , disinfection [12] , disintegration of waste activated sludge [13] , emulsification (including biodiesel synthesis) [14] , delignification [15] , food processing [16] , flotation [17] , surface finishing and washing [18] , denitration [19] , heat generation [20] , etc.…”

Study on Dissolution Characteristics of Excess Sludge by Low-Temperature Thermal Hydrolysis and Acid Production by Fermentation

“…COD was determined by fast digestion spectrophotometry; TOC was determined by a total organic carbon analyzer; carbohydrate used anthracene method with glucose as the standard to determine absorbance at 625 nm; protein used the Coomassie Brilliant G250 method with bovine serum protein as the standard to determine the absorbance of the sample at 595 nm. 41 DNA was determined by the diphenylamine method. VFAs were determined by high-performance liquid chromatography (PerkinElmer, Altus A-10).…”

“…The sludge samples were centrifuged at 9000 rpm for 10 min, and the supernatant was decanted and filtered through a 0.45 μm filter membrane for analysis. COD was determined by fast digestion spectrophotometry; TOC was determined by a total organic carbon analyzer; carbohydrate used anthracene method with glucose as the standard to determine absorbance at 625 nm; protein used the Coomassie Brilliant G250 method with bovine serum protein as the standard to determine the absorbance of the sample at 595 nm . DNA was determined by the diphenylamine method.…”

Archives of Civil Engineering

“…It involves introducing energy into the sludge, which is aimed at weakening and bursting cell membranes of micro-organisms in the sludge. As a result of disintegration the waste becomes more susceptible to biochemical decomposition [15,70]. There are numerous sewage sludge disintegration methods, most usually classified as mechanical (i.e.…”