Improvement of COD and color removal from UASB treated poultry manure wastewater using Fenton's oxidation

Fenton´s Process for the Treatment of Mixed Waste Chemicals

“…Recent applications of Fenton´s reagent include the pre-treatment of olive mill wastewater (Lucas & Peres, 2009), the treatment of landfill leachate (Deng & Englehardt, 2006;Zhang et al, 2005), copper mine wastewater (Mahiroglu et al, 2009), water-based printing ink wastewater (Ma & Xia, 2009) and cosmetic wastewaters (Bautista et al, 2007), the degradation of pesticide (Li et al, 2009;Chen et al, 2007), antibiotic (Ay & Kargi, 2010;Elmolla & Chaudhuri, 2009), high-strength livestock wastewater (Lee & Shoda, 2008) and organic compounds of nuclear laundry water (Vilve et al, 2009), the oxidation of combined industrial and domestic wastewater (Badawy & Ali, 2006), the pre-oxidation of pharmaceutical wastewaters (Martínez et al, 2003), the treatment of water-based paint wastewater (Kurt et al, 2006) and cellulose bleaching effluents (Torrades et al, 2003), the degradation of the explosives 2,4,6-trinitrotoluene (TNT) and hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) after iron pretreatment (Oh et al, 2003), and the treatment of different streams of textile wastewaters, such as the treatment of hot desizing wastewaters (Lin & Lo, 1997), and the treatment of dye wastewaters (Wang et al, 2008;Gulkaya et al, 2006). Fenton´s reagent is also combined with biological process, as a pre-treatment to enhance the biodegradability of the recalcitrant compounds and lower the toxicity (Padoley et al, 2011, Mandal et al, 2010, Badawy et al, 2009 or as a post-treatment to improve the efficiency of the wastewater treatment (Ben et al, 2009, Yetilmezsoy & Sakar, 2008). Fenton's reagent, which involves homogenous reaction and is environmentally acceptable (Bham & Chambers, 1997), is a system based on the generation of very reactive oxidizing free radicals, especially hydroxyl radicals, which have a stronger oxidation potential than ozone; 2.8 V for •OH and 2.07 V for ozone (Heredia et al, 2001).…”

Performance evaluation and kinetic modeling of the start-up of a UASB reactor treating municipal wastewater at low temperature

“…The initial average diameter of the granules was found to be about 3.5 mm, and the density of the granular sludge was measured to be 1,050 kg/m 3 , as described in by Yetilmezsoy [26]. The mean settling velocity was determined using the well-known force balance equation as follows [32]:…”

“…In the determination of u t , the drag coefficient (n) being a function of Reynolds number at terminal settling velocity was obtained using Perry's and Green's equation from the following equation [32]: …”

Effect of extracellular enzyme activity on digestion performance of mesophilic UASB reactor treating high-strength municipal wastewater

“…The mean settling velocity and Reynolds number at terminal settling velocity of the granules having a diameter of 3.5 mm were determined to be 192.35 m/h and 187.01 for the viscosity of water at room temperature (10 -3 kg m/s or Pa s), respectively. Detailed hydrodynamic calculations of terminal settling velocity and Reynolds number for sample granules can be found in the previous works [34,35].…”