ORCID Profile
0000-0002-4257-8113
Current Organisation
Tianjin University
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Publisher: Elsevier BV
Date: 09-2019
DOI: 10.1016/J.BIORTECH.2019.121619
Abstract: Biofilm carriers play an important role in attached growth systems for wastewater treatment processes. This study systematically summarizes the traditional and novel biofilm carriers utilized in biofilm-based wastewater treatment technology. The advantages and disadvantages of traditional biofilm carriers are evaluated and discussed in light of basic property, biocompatibility and applicability. The characteristics, applications performance, and mechanism of novel carriers (including slow-release carriers, hydrophilic/electrophilic modified carriers, magnetic carriers and redox mediator carriers) in wastewater biological treatment were deeply analyzed. Slow release biofilm carriers are used to provide a solid substrate and electron donor for the growth of microorganisms and denitrification for anoxic and/or anaerobic bioreactors. Carriers with hydrophilic/electrophilic modified surface are applied for promoting biofilm formation. Magnetic materials-based carriers are employed to shorten the start-up time of bioreactor. Biofilm carriers acting as redox mediators are used to accelerate biotransformation of recalcitrant pollutants in industrial wastewater.
Publisher: Elsevier BV
Date: 09-2015
DOI: 10.1016/J.BIORTECH.2015.06.015
Abstract: Copper (Cu) is a toxic heavy metal which can cause inhibitory effects on nitrification process in biological wastewater treatment systems. However, few studies have done to dose accelerators into Cu-inhibited activated sludge system to promote bioactivity recovery of ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB). In this study, four ingredients of bio-accelerators were developed and dosed in five parallel SBRs. The effluent NH4(+)-N, NO2(-)-N and NO3(-)-N concentrations, specific oxygen uptake rate (SOUR), and Cu distribution were investigated to assess the bioactivity recovery effects. Results showed that, among biotin, L-aspartic acid and cytokinin, L-aspartic acid was the most effective for the fast bioactivity recovery of nitrifying bacteria. The combination of these three substances was optimum and Cu-inhibited activated sludge system could be 100% recovered in 8 days. The bio-accelerators proposed in this study can be potentially applied in the emergency treatment in biological wastewater treatment systems.
Publisher: Elsevier BV
Date: 2016
DOI: 10.1016/J.BIORTECH.2015.10.089
Abstract: Cadmium (Cd) is toxic to nitrifying bacteria, but current studies on recovery process in Cd-inhibited activated sludge system are limited, especially on intensify-recovery processes with developing and optimizing nontoxic bio-accelerators. In this study, bioactivity recovery effects were demonstrated with respect to effluent NH4(+)-N, NO2(-)-N, NO3(-)-N concentrations, specific oxygen uptake rates and cadmium distribution in five parallel SBRs. Results indicated that bioactivity of nitrifying bacteria was mainly inhibited by surface-bound Cd. Dosing biotin, l-aspartic acid and cytokinin simultaneously was the most effective. Linear chain, together with amide (NH) and carboxyl (COOH) groups, may be important factors in fast nitrification recovery process. In terms of dosage and dosing mode, six-multiple dosage of optimal mixture with dosing at each cycle evenly was the most effective and bioactivities of nitrifying bacteria could 100% recovered within 7days. The bio-accelerators and optimum usage can be potentially applied to cope with heavy metal shock-loading emergency situations.
Publisher: The Chemical Society of Japan
Date: 05-05-2015
DOI: 10.1246/CL.150035
Publisher: Elsevier BV
Date: 07-2015
No related grants have been discovered for Min Ji.