Nanjing University

Other

Tongji University

Hongqiang Ren

Lili Ding

Ke Xu

Jinju Geng

Bing Wu

Haidong Hu

XuXiang Zhang

Hui Huang

Kewei Liao

Yan Mei Zhang

Kailong Huang

Yanru Wang

Chuan Niu

Xingsheng Gao

Sijia Ma

Deyuan Dong

Hui Liu

Yan Zhang

Jinfeng Wang

Xinkun Ren

Tao Zhang

Lin Ye

Xiaolei Shi

Zhanhui Shen

Ming Hua Liu

Xiong Zheng

Yinguang Chen

Qing Wang

Haining Huang

Jin Wang

Yue Yu

Xuxiang Zhang

Yonggang Wu

Jianxin Li

Chong Peng

Huimin Fu

Qiucheng Li

Shuhan Wen

Yunjun Yang

Jicheng Xie

Lei Ge

Feifei Wang

Huimei Chen

Bingqing Xin

Su Liu

Yingying Fu

Yang He

Depeng Wang

Lili Jin

Jun Hu

Zhengqing Liu

Yuanji Shi

Xian Cui

Yuhang Ren

Haohao Sun

Yinglong Su

Yueying Liu

Yuexin Yu

Mengtian Chen

Liye Wang

Zehua Yan

Yuan Lin

Xiaobing Hu

Shijing Tang

A deep learning-based method for predicting the settleability of activated sludge includes: (1) collecting a plurality of activated sludge samples, acquiring raw data of images of the plurality of activated sludge samples, cleaning the raw data of the images, and standardizing data sizes of the images; (2) calculating a sludge volume index (SVI) for each of the plurality of activated sludge samples; (3) establishing, by using a ResNet50 deep neural network, a model for predicting the settleability of activated sludge; and (4) predicting the settleability of a target activated sludge using the model established in (3).

Deep learning-based method for predicting settleability of activated sludge

A compact rotary algae biofilm reactor includes an algae biofilm module and a light guide module. The algae biofilm module includes a plurality of rotary members and a reaction tank. In the rotary member, an algae biofilm growth carrier and a power transmission belt are wound on a driving shaft and a driven shaft. A top end of the rotary member is fixed on a fixing frame while a bottom end thereof is submerged in the reaction tank. The light guide module includes a rotatable lens holder. The rotatable lens holder is fixedly provided with a linear Fresnel lens on an upper end thereof and is provided with a light guide plate on a lower end thereof. One side of the linear Fresnel lens is provided with a step motor configured to control the linear Fresnel lens to rotate with an angle of sunlight.

Compact rotary algae biofilm reactor

The present invention discloses astrain, namedEBT-2, which was deposited in China Center for Type Culture Collection under Deposit No. CCTCC M 2019731 on Sep. 17, 2019. The present invention also discloses a composite microbial inoculum which is prepared by mixing an expanded culture solution of aEBT-1 with Deposit No. CCTCC M 2019730 and an expanded culture solution of theEBT-2 with Deposit No. CCTCC M 2019731 in a volume ratio of 1:1. The present invention finally discloses use of the composite microbial inoculum in treating membrane concentrate of landfill leachate. The composite microbial inoculum is capable of implementing high-efficiency biological denitrification of the membrane concentrate of landfill leachate.

strain, composite microbial inoculum prepared fromstrain and use of composite microbial inoculum

A device for in-situ measuring settleability of activated sludge includes a sample chamber, an ultrasonic time domain reflectometer, a magnetic stirrer, an ultrasonic probe, a sample inlet, a sample outlet, and a stagnant zone. The sample chamber is configured to hold an activated sludge sample, and the ultrasonic time domain reflectometer is configured to measure the settling characteristics of the activated sludge. The stagnant zone is disposed in the sample chamber. The sample inlet and the sample outlet communicate with the sample chamber. The stagnant zone includes a top part, a sidewall, and a bottom part. The sample inlet is connected to the top part of the stagnant zone. The sample outlet is connected to the sidewall of the stagnant zone. The magnetic stirrer is disposed at the bottom part of the stagnant zone. The ultrasonic probe is disposed on the top part of the stagnant zone.

Device and method for measuring settleability of activated sludge in-situ

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 method for collaborative optimization control method for organic nitrogen and inorganic nitrogen in a denitrification process is provided. The method includes: establishing ASM-mDON-DIN models for simultaneous simulation of microbial dissolved organic nitrogen (mDON) and inorganic nitrogen (DIN) in denitrification processes; and selecting a corresponding ASM-mDON-DIN model according to a set carbon/nitrogen ratio to collaboratively optimize the concentration values of mDON and DIN in the effluent in the denitrification process, to obtain best process operation parameter values.

Method for collaborative control of organic nitrogen and inorganic nitrogen in denitrification process

The present disclosure discloses a method for removing chlorinated hydrocarbons in groundwater through step-by-step electrocatalytic dechlorination degradation. A double-chamber electrolyzer reactor is used to carry out step-by-step electrocatalytic dechlorination degradation to remove chlorinated hydrocarbons in groundwater. The double-chamber electrolyzer reactor comprises a cathode chamber, a proton exchange membrane, an anode chamber and an intermediate processing unit, wherein the cathode chamber is separated from the anode chamber through the proton exchange membrane, and the intermediate processing unit is connected between the cathode chamber and the anode chamber through a cathode chamber water outlet, an anode chamber water inlet and pipelines. The double-chamber electrolyzer reactor adopted in the present disclosure is simple in structure and convenient to use, is capable of effectively enhancing the removal effect of electric catalysis on chlorinated hydrocarbon substances and reducing toxic and harmful substances produced by direct oxidization of chlorinated hydrocarbons, and has a good application prospect.

Method for removing chlorinated hydrocarbons in groundwater through step-by-step electrocatalytic dechlorination degradation

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 disclosure provides a method for evaluation of removal of nitrogen-containing organic matter from the wastewater. The method includes: 1) pretreating a wastewater sample from a wastewater treatment plant; enriching nitrogen-containing organic matter in the wastewater sample with a solid-phase extraction cartridge; separating the nitrogen-containing organic matter from a substrate and disruptors of the wastewater sample, and collecting the nitrogen-containing organic matter; 2) detecting and analyzing the nitrogen-containing organic matter collected in 1) with a Fourier-transform ion cyclotron resonance mass spectrometer, thereby obtaining mass spectra of the nitrogen-containing organic matter; 3) preprocessing peak data of the mass spectra of the nitrogen-containing organic matter in each wastewater sample; setting the nitrogen-containing organic matter corresponding to the peak data as a global variable; arranging wastewater samples into cross-sectional data according to wastewater treatment processes; creating an assessment matrix for evaluating removal of the nitrogen-containing organic matter.

Method for evaluating removal of nitrogen-containing organic matter in wastewater

A method for intensification of advanced biological nitrogen removal and reduction of endocrine disrupting toxicity, and belongs to the technical field of advanced wastewater treatment includes the steps of utilizing the reaction of calcium sulfate and hydrogen peroxide solution under alkaline conditions to prepare nano-calcium peroxide (n-CP) oxygen-releasing materials, then the polyvinyl alcohol is used as a framework material, the sodium carboxymethyl cellulose is used as a bonding agent, the stearic acid is used as buffering agent and stabilizing agent, the prepared n-CP is used as an oxygen-releasing material, and the quartz sand is used to increase the material density to the sustained-release calcium peroxide nanoparticles (SR-nCPs) through the encapsulation method.

Method for intensification of advanced biological nitrogen removal and reduction of endocrine disrupting toxicity

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 identifying and analyzing dissolved organic nitrogen of different sources in wastewater includes extracting DON in wastewater to obtain a DON extract, detecting mass spectrum peaks in the DON extract, pre-processing the spectral data of the wastewater sample; constructing a network relationship of the substance reaction in the wastewater sample; screening the substance reaction relationship of DON; and determining different sources of DON.

Method for identifying and analyzing dissolved organic nitrogen of different sources in wastewater and application of the method

A biological toxicity test method for evaluating an ecological safety of an advanced oxidation process comprising the following steps: (1) collecting (preparing) a waste water to be determined; (2) collecting the waste water and a tap water after the advanced oxidation process treatment; (3) subjecting Koi () to the water after treatment for exposure to poison; (4) Determining an anti-oxidation enzyme activity of a liver of the Koi after exposure; (5) Data analyzing. By comparing the changes of liver enzyme activities in different water, the present method evaluates the toxicity changes of micro-pollutant containing water before and after treatment, which fills in the gap of the ecological risk assessment for advanced oxidation technology.

Biological toxicity test method for evaluating the ecological safety of advanced oxidation processes

A method for separating microplastics from an animal feces, the method including: 1) freeze-drying an animal fecal sample; 2) transferring the animal fecal sample dried in 1) into a beaker, adding a Fenton's reagent; stirring a mixture of the animal fecal sample and the Fenton's reagent until no bubbles were produced; constantly adding the Fenton's reagent to the mixture; filtering the mixture through a plurality of cellulose nitrate-cellulose acetate (CN-CA) membranes, and transferring the plurality of CN-CA membranes into a plurality of 500 mL beakers; adding 100 mL of 65% HNOto each beaker, placing the each beaker in a water bath firstly at 50&#xb0; C. for 30 min and then at 70&#xb0; C. for 15 min; cooling the each beaker in an ice bath, and filtering a solution in the each beaker through a first polytetrafluoroethylene (PTFE) membrane; and 3) transferring the first PTFE membrane into a 500 mL beaker.

Method for separating microplastics from animal excrement

A method for modifying a wastewater treatment device, the method including: 1) fixing a filling support in a wastewater pool, where the filling support includes a support frame; the support frame includes a hollow shaft, a fixed ring, and at least one vane; 2) adjusting the height of the filling support, until the fixed ring is submerged below the liquid level of the wastewater pool, where the water intake velocity of the wastewater pool is no less than 0.25 m/s, whereby a water current is produced and drives the support frame to rotate; 3) adding a functional liquid into the hollow shaft; and 4) adding an enzyme mixture to the hollow shaft when the rotation speed of the support frame is less than a first preset value, until the rotation speed of the support frame reaches a second preset value.

Method for modifying wastewater treatment device

Growing community of inventors

Nanjing, China

Hongqiang Ren