Effect of salinity on removal performance and activated sludge characteristics in sequencing batch reactors

Effects of carbon to nitrogen ratio on the performance and stability of aerobic granular sludge

“…These in Bacteroidetes were 37.4 and 10.9%, respectively, indicating decrease in the proportion. The Bacteroidetes, as with Firmicutes, was reported to show strong domination under condition of high salinity [85][86][87][88].…”

Duckweed systems for eutrophic water purification through converting wastewater nutrients to high-starch biomass: comparative evaluation of three different genera (Spirodela polyrhiza, Lemna minor and Landoltia punctata) in monoculture or polyculture

“…20 However, unlike activated sludge system, microbial nitrication/denitrication was the predominant route of N removal. 6 Duckweed uptake, which was far beyond microbial contribution, was the main way to N removal in duckweed system. 20 In the rst 10 days, the TN concentration in the S. polyrhiza K1-based system decreased below 1.5 mg L À1 (corresponded to the standard of Grade IV which is mainly applicable to the water areas for industrial use according to CSWEQS), while TN concentrations of L. minor K2, L. punctata K3 and the polyculture duckweed were all over 1.5 mg L À1 (Table 2).…”

“…For example, activated sludge system, as a conventional microbial treatment process, can convert ammonia into gaseous nitrogen (e.g., N 2 , NO x ), and remove phosphorus from wastewater in the form of sludge, thereby improving water quality. [4][5][6] However, this process cannot facilitate the recovery of pollutants from wastewater, 5 and wastewater advanced treatment is of high-cost. Meanwhile, the growing volume of sludge also increases the burden to environment.…”

Dominance ofCandidatus saccharibacteriain SBRs achieving partial denitrification: effects of sludge acclimating methods on microbial communities and nitrite accumulation

“…Conversely, Cao et al 12 reported that the nitrate and nitrite reduction rates were inhibited by high pH values but the nitrate reduction was more vulnerable to a high pH. Chen et al 13 stated that salinity decreased the nitrogen removal efficiency of activated sludge and increased the extracellular polymeric substance (EPS) content. Li et al 14 described an efficient method that increased the inuent salinity for enriching the community of partial denitriers.…”