Nanjing University

Other

XuXiang Zhang

Hongqiang Ren

Bing Wu

Hui Huang

Kailong Huang

Lin Ye

Yan Mei Zhang

Jinju Geng

Haidong Hu

Jinfeng Wang

Qing Wang

Kewei Liao

Yue Yu

Sijia Ma

Huimei Chen

Su Liu

Yang He

Depeng Wang

Chong Peng

Yuanji Shi

Haohao Sun

The present disclosure discloses a method and device for removing Organic Micropollutants (OMPs) in water, and belongs to the technical field of wastewater treatment. The method includes the following steps: S1: aerating residual sludge under a starvation condition to enrich starved-state microorganisms; and S2: treating wastewater containing OMPs under an aeration condition with sludge containing the starved-state microorganisms obtained in step S1, and periodically updating the sludge containing the starved-state microorganisms. According to the present disclosure, aerobic starvation treatment is performed on the sludge to gradually reduce the abundance of microorganisms that may use degradable organic matters only and enrich microorganisms that may use complex organic matters in the sludge, and the enriched sludge may degrade various OMPs and be used to remove OMPs in wastewater. The process is easy to operate and low in cost and has relatively high practical application value.

Method and device for removing organic micropollutants (OMPs) in water

A system for cleaning wastewater, includes: an absorption-biodegradation-denitrification (ABN) reactor, a sequential adsorption reactor, a disinfection reactor, and a sludge anaerobic fermentation reactor. The ABN reactor is an integrated reactor including: a biosorption tank, an intermediate sedimentation tank, a biologically-enhanced degradation tank, a denitrification biofilter, and a secondary sedimentation tank. The pretreated wastewater is introduced into the ABN reactor for removal of chemical oxygen demand, nitrogen and phosphorus; the ABN reactor effluent is introduced into the sequential adsorption reactor for the removal of high-risk pollutants; the sequential adsorption reactor effluent is introduced into the disinfection reactor for the elimination of viruses and other pathogenic microorganisms; the sludge produced by the ABN reactor is introduced into the anaerobic sludge fermentation reactor for alkaline fermentation. The system is effective for removing high-risk pollutants and reducing effluent toxicity, which can be used for the upgrading and reconstruction of the wastewater treatment system.

System for cleaning wastewater

The present invention discloses a method for starting a single-stage system for nitrogen removal coupling partial denitrification and anammox. The two nitrogen removal processes are coupled by gradually enriching denitrifying bacteria in anammox granular sludge and then activating the partial denitrification process of the functional bacteria (denitrifying bacteria). Particularly, the method comprises: inoculating anammox granular sludge in a single-stage reactor, adding an organic carbon source in gradients to enrich denitrifying bacteria and to adapt anammox bacteria, and replacing nitrites in feed with nitrates gradually to activate the partial denitrification process.

Method for starting single-stage system for nitrogen removal coupling partial denitrification and anammox

A method for achieving rapid startup of a denitrification biofilter tank, which belongs to the technical field of biofilm sewage treatment. The specific steps are: 1. selecting heterotrophic denitrification or mixotrophic denitrification to treat influent sewage; 2. when the heterotrophic denitrification is used, pretreating the filter material with sodium carboxymethyl cellulose solution and then adding rhamnolipid after the introduction of sewage until the biofilter tank system starts successfully; 3. when the mixotrophic denitrification method is used, the filter tank is inoculated after the introduction of sewage, and the rhamnolipid is added thereto and is changed to sulfur source after operation for a while until startup is complete. The invention solves the problem that the denitrification biofilter tank in the sewage treatment is particularly slow in the mixotrophic state, and has a good application prospect.

Method for realizing rapid startup of denitrification biofilter

A modular backwash assembly and method for using the same is disclosed, the modular backwash assembly comprises a filter brick body, an ultrasonic generator and an ultrasonic connecting component, the filter brick body is provided at an upper portion with a square trench and a cover, the square trench is provided with a plurality of stiffeners and fillers, and a conductive channel is provided on the periphery of the square trench and is provided with an ultrasonic conductive medium therein. The invention has the advantages of firm structure and durable, the gas distribution uniformity may be increased up to 96% and the turbidity average is below the specification 10 NTU.

Modular backwash assembly and method for using the same

A method for characterizing toxicity of toxic pollutants and a method for characterizing comprehensive toxicity of water bodies. The methods include constructing a reporter gene cell line expressing CHOP gene associated with endoplasmic reticulum stress.

Methods for assessing toxicity

A method for analyzing water toxicity, the method including: exposure experiment, sample collection, transcriptome detection, metabolome detection, screening of differentially expressed genes, screening of differentially expressed metabolites, and identification of commonly changed biological pathways in both the transcriptome and the metabolome.

Method for analyzing water toxicity

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Nanjing, China

XuXiang Zhang