Developing a novel biofiltration treatment system by coupling high-rate infiltration trench technology with a plug-flow porous-media bioreactor

Removal of Trace Organic Chemicals during Long-Term Biofilter Operation

“…Sulfamethoxazole was the only compound for which biodegradation in sand was clearly better than in BAC (32% removal vs 5% removal). However, various degrees of sulfamethoxazole biodegradation are reported in the literature, ranging from poor , to moderate ,, to good, , with removal described as a function of EBCT, DO, and microbial communities present, ,,, and the greater observed removal in sand could be due to a more suitable combination of the aforementioned conditions. The presence of valsartan acid, a known transformation product of various sartan compounds, under oxic conditions in both media confirms that biodegradation was occurring in both filters.…”

“…Filter columns were 25 cm long (23 cm of medium and 2 cm of liquid) and made of ISO 9002 acrylic glass with ⌀ in = 7.1 cm. To ensure that TOrC breakthrough results were comparable, both column systems continuously received the same secondary treated wastewater from the WWTP in Garching, Germany (31000 population equivalents), which was undergoing ultraviolet disinfection during the summer months (April through October) and year-round rapid sand filtration (RSF) and later Dynasand filtration (Dynasand, Nordic Water GmbH) . Both media were virgin at the beginning of the experiment, and to preload medium adsorption sites, both columns were fed with nonspiked tertiary effluent for ∼7500 BVT before TOrC spiking commenced.…”

“…In certain indirect potable reuse systems, advanced treated effluent is then introduced into the subsurface during managed aquifer recharge (MAR), where TOrCs are further removed through biodegradation. Improved removal of recalcitrant compounds has been observed under oxic and oligotrophic conditions using the sequential managed aquifer recharge technology (SMART) concept. , SMART was further optimized with shorter hydraulic retention times (HRTs), smaller physical footprints, and technical sand filter media in the sequential biofiltration and SMART plus biofilters. , However, certain compounds such as carbamazepine are resistant to biodegradation and must therefore be removed through other mechanisms . This can be accomplished by using an adsorptive porous medium in biofiltration, such as granular activated carbon (GAC) …”

Supporting the Water Reservoir Restoration Processes by Using Selected Type of Biological Beds

“…Additional treatment-enhancing technologies are mainly based on aeration processes (Carr and Martin, 1978;Dixit et al, 2007;Dong et al, 2012;Chmielowski et al, 2019;Anber et al, 2020), or controlled planting of ecotones in zones of intensive nutrient supply to water (Vought et al, 1994;Fennessy and Cronk, 1997;Holland, 2012). From the industry practice in the field of aquaculture, we can find information about supporting the treatment process by using bioreactors or appropriately adapted band ditches (as flow biofilters) (Klapper, 2002;Karakurt-Fischer et al, 2020). The use of moving beds requires additional installations with a separate aerated bioreactor chamber operating in the continuous flow or continuous quasi mode (Mazur, 2019B).…”

Seleção de Áreas Prioritárias para Instalação de Medidas de Desenvolvimento Urbano de Baixo Impacto: O Caso do Bairro de Bodocongó em Campina Grande, PB

“…Esse processo de urbanização também ocasiona impactos no sistema de drenagem, devido principalmente à impermeabilização que resulta em alterações nos processos hidrológicos, como aumento do escoamento superficial e diminuição da capacidade natural de retenção e infiltração do solo, agravando as cheias (Targa et al 2012;Tucci 2016;Righetto, Rafael & Freitas 2017;Karakurt-Fischer et al 2020).…”