Simultaneous methane production and wastewater reuse by a membrane-based process: Evaluation with raw domestic wastewater

Linking microbial community structure to membrane biofouling associated with varying dissolved oxygen concentrations

“…The mixed liquor suspended solid (MLSS) concentration of the MBR kept around 5000 mg L À1 under all DO concentrations. The MBR system was fed with actual municipal wastewater, and the chemical oxygen demand (COD), NH þ 4 -N and pH of the actual wastewater were in the range of 203.9-366.0 mg L À1 , 33.2-61.4 mg L À1 and 7.28-7.83, respectively (Gao et al, 2011). The different DO conditions were maintained by consecutive measurement of DO in MBR and manually adjusting the aeration pump.…”

“…Total nitrogen (TN) removal was influenced by DO, reaching 80.9%, 77.0% and 67.4% at DO concentrate of 4.0, 2.0 and 0.5 mg L À1 , respectively. The details about COD and nitrogen removal have been reported before (Gao et al, 2011).…”

Performance and Microbial Diversity in a Low-Energy ANF-WDSRBC System for the Post-Treatment of Decentralized Domestic Wastewater

“…That may be attributed to the energy recovery and low sludge production in anaerobic bioreactors [1][2][3]. Despite of these advantages, anaerobic techniques are not widely adopted due to the lack of nitrogen removal capability [4][5][6][7]. Even though nitrogen is one of the important nutrients for agriculture and landscaping irrigation reuse [8], nitrogen also plays a major role in oxygen depletion and eutrophication in the receiving water bodies [9].…”

“…It was reported that aerated filters [10], water-dropping aeration submerged biofilm reactor (WDABR) [4], aerobic membrane bioreactor (MBR) [6,7], stabilization ponds [11], and constructed wetlands (CW) [12,13] had been applied in decentralized domestic wastewater treatment. Nevertheless, there still have many challenges, such as high energy consumption in aerobic systems, low organic load rate, flow clogging of constructed wetlands and high land footprint of stabilization ponds existed during the whole process.…”

Application of immobilized and granular dried anaerobic biomass for stabilizing and increasing anaerobic bio-systems tolerance for high organic loads and phenol shocks

“…The effective control of sludge retention time, potentially high biomass concentration and, consequently, the option of applying low hydraulic retention times have encouraged the adoption of immobilized biomass technology (Fazolo et al, 2007). Moreover, immobilization of biomass increases its tolerance to hydraulic or quality shocks, providing a secure environment for efficient activity (Gao et al, 2011).…”