Untreated or improperly treated wastewater/sewage can lead to eutrophication of water bodies, promoting the activity of Pfiesteria and accelerating the production of carcinogenic microcystins. NO2--N in wastewater can react with amines to produce carcinogens such as nitrosamines. Fish and amphibians can be killed or have their reproduction harmed by concentrations of 0.1 to 10 mg/L NH4+-N. Domestic sewage alone accounts for more than 50% of the non-point load on aquatic ecosystems in developing countries. In addition, some special pollutants in industrial wastewater, such as dyes, have the characteristics of high chromaticity, strong toxicity, and difficult degradation. If the pollutants are not effectively treated, the oxygen level in the water will decrease, harming the growth of aquatic organisms and disrupting the food chain of the local ecosystem as well as its potential to self-purify. To achieve the standards before discharge, it is urgently necessary to effectively treat wastewater/sewage.
The biofilm system has received a lot of attention among wastewater/sewage treatment methods due to its long retention time, good tolerance to stress conditions, less washing out, and promotion of slow-growing bacteria. Biocarrier is the core of the biofilm system and directly determines the effectiveness of biological treatment. Commonly used biocarriers include polyethylene, polypropylene, polyurethane, and ceramsite. However, they are usually weakly hydrophilic and unfavorable to the transfer of pollutants or the adhesion of surface-positive bacteria. To improve wastewater/sewage treatment performance, it is necessary to develop innovative modification techniques and novel biocarriers with better pollutants removal performance.
This Research Topic mainly focuses on the wastewater/sewage treatment process, the development of modified or novel biocarriers, the application of biofilm systems in pollutant removal, and the influence of heavy metals, influent pollutant concentration, and other influencing factors on the removal mechanism and microbial community.
1. Reports on the pollutants removal performance and mechanism of the biofilm system based on the novel/modified biocarriers for industrial wastewater/domestic sewage, as well as the synergistic effect with microbial community.
2. Works describing the effects of influent metal ions or pollutant concentration and other impacting factors on pollutants removal performance, mechanisms, and microbial communities in biofilm systems.
3. Works dealing with new processes, such as anammox, denitritation, simultaneous nitrification-denitrification, phosphorus removal, etc.
4. Biofilm technologies that add biochar or adopt other strengthening measures to improve the removal efficacy.
5. Studies investigating factors that influence the formation mechanisms of biofilm and boost its rapid formation, biofilm aging, and restoration methods.
Untreated or improperly treated wastewater/sewage can lead to eutrophication of water bodies, promoting the activity of Pfiesteria and accelerating the production of carcinogenic microcystins. NO2--N in wastewater can react with amines to produce carcinogens such as nitrosamines. Fish and amphibians can be killed or have their reproduction harmed by concentrations of 0.1 to 10 mg/L NH4+-N. Domestic sewage alone accounts for more than 50% of the non-point load on aquatic ecosystems in developing countries. In addition, some special pollutants in industrial wastewater, such as dyes, have the characteristics of high chromaticity, strong toxicity, and difficult degradation. If the pollutants are not effectively treated, the oxygen level in the water will decrease, harming the growth of aquatic organisms and disrupting the food chain of the local ecosystem as well as its potential to self-purify. To achieve the standards before discharge, it is urgently necessary to effectively treat wastewater/sewage.
The biofilm system has received a lot of attention among wastewater/sewage treatment methods due to its long retention time, good tolerance to stress conditions, less washing out, and promotion of slow-growing bacteria. Biocarrier is the core of the biofilm system and directly determines the effectiveness of biological treatment. Commonly used biocarriers include polyethylene, polypropylene, polyurethane, and ceramsite. However, they are usually weakly hydrophilic and unfavorable to the transfer of pollutants or the adhesion of surface-positive bacteria. To improve wastewater/sewage treatment performance, it is necessary to develop innovative modification techniques and novel biocarriers with better pollutants removal performance.
This Research Topic mainly focuses on the wastewater/sewage treatment process, the development of modified or novel biocarriers, the application of biofilm systems in pollutant removal, and the influence of heavy metals, influent pollutant concentration, and other influencing factors on the removal mechanism and microbial community.
1. Reports on the pollutants removal performance and mechanism of the biofilm system based on the novel/modified biocarriers for industrial wastewater/domestic sewage, as well as the synergistic effect with microbial community.
2. Works describing the effects of influent metal ions or pollutant concentration and other impacting factors on pollutants removal performance, mechanisms, and microbial communities in biofilm systems.
3. Works dealing with new processes, such as anammox, denitritation, simultaneous nitrification-denitrification, phosphorus removal, etc.
4. Biofilm technologies that add biochar or adopt other strengthening measures to improve the removal efficacy.
5. Studies investigating factors that influence the formation mechanisms of biofilm and boost its rapid formation, biofilm aging, and restoration methods.