Journal of Chemistry / 2015 / Article / Tab 3

Research Article

Novel Water Treatment Processes Based on Hybrid Membrane-Ozonation Systems: A Novel Ceramic Membrane Contactor for Bubbleless Ozonation of Emerging Micropollutants

Table 3

Impact of water constituents on the use of ozone for disinfection [25].

ConstituentEffect

BOD, COD, TOC, and so forthOrganic compounds that comprise the BOD and COD can exert an ozone demand. The degree of interference depends on their functional groups and their chemical structure
NOM (natural organic matter)Affects the rate of ozone decomposition and the ozone demand
Oil and greaseCan exert an ozone demand
TSSIncrease ozone demand and shielding of embedded bacteria
AlkalinityNo or minor effect
HardnessNo or minor effect
AmmoniaNo or minor effect and can react at high pH
NitriteOxidized by ozone
NitrateCan reduce effectiveness of ozone
IronOxidized by ozone
ManganeseOxidized by ozone
pHAffects the rate of ozone decomposition
Industrial dischargesDepending on the constituents, may lead to diurnal and seasonal variations in the ozone demand
TemperatureAffects the rate of ozone decomposition

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