Impacts of coagulation on the adsorption of organic micropollutants onto powdered activated carbon in treated domestic wastewater

Comparing and modeling organic micro-pollutant adsorption onto powdered activated carbon in different drinking waters and WWTP effluents

“…Regarding the practical prediction of adsorptive OMP removals, previous publications demonstrated the potential of the adsorptive UV 254 removal as a useful surrogate parameter in WWTP effluents (Altmann et al, 2014(Altmann et al, , 2015Anumol et al, 2015;Zietzschmann et al, 2015aZietzschmann et al, , 2014aZietzschmann et al, , 2015b. In different WWTP effluents of the same regional background, overall correlations were found for several OMP (Altmann et al, 2014).…”

Super-fine powdered activated carbon (SPAC) for efficient removal of micropollutants from wastewater treatment plant effluent

“…The addition of a coagulant has been shown to improve DOM removal; however it mainly adsorbed the non-competing DOM fraction and, consequently, the elimination of micropollutants using PAC with a coagulant was not enhanced (Altmann et al, 2015). The combined application of SPAC and a coagulant before a membrane was successfully tested by Matsui et al, who found better membrane performance and no influence of the order of the coagulant e PAC/ SPAC dosing sequence on the DOM removal from surface waters (Matsui et al, 2004).…”

“…In practice, a coagulant is generally applied to ensure adequate retention of the PAC by the membrane and reduce fouling (Altmann et al, 2015;Boehler et al, 2012;Margot et al, 2013). The addition of a coagulant has been shown to improve DOM removal; however it mainly adsorbed the non-competing DOM fraction and, consequently, the elimination of micropollutants using PAC with a coagulant was not enhanced (Altmann et al, 2015).…”

Application of SAC254 measurement for the assessment of micropollutant removal in the adsorptive treatment stage of a municipal wastewater treatment plant

“…The SAC 254 reduction arises primarily from adsorption of dissolved residual organic matter on the PAC. Part of the reduction is also due to an effect of the flocculant (Altmann et al 2015). Beyond this, it is possible that biological processes in the activated carbon sludge of the adsorption stage and the filter bed can cause a reduction in SAC 254 as well.…”