The invention discloses a process for intensifying anaerobic degradation and transformation of azo dyes based on breath of a microbial electrode. The process comprises the following steps: putting a microbial electrochemical system in an anaerobic reactor to form a coupling reactor; inoculating anaerobic sludge under the room temperature condition; after adjusting the pH value of the azo dye wastewater, the hydraulic retention time, the inflow COD concentration and the inflow azo dye concentration, filtering the azo dye wastewater and carrying out precipitating; feeding the wastewater to the coupling reactor by the action of a peristaltic pump; while decoloring being obvious after initial degradation by the anaerobic reactor in the coupling reactor, treating the wastewater by the microbial electrochemical system; and finally discharging the azo dye wastewater through a secondary sedimentation tank. The key point of the invention lies in that an efficient anaerobic reactor for intensifying biodegradation of the azo dyes based on breath of the microbial electrode is constructed;the addition of chemical agents is reduced; the consumption of electric energy is reduced; and the electric energy is recovered while the pollutants are degraded, so that the cost for treating the azo dye wastewater is effectively lowered.

Process for intensifying anaerobic degradation and transformation of azo dyes based on breath of microbial electrode

The invention discloses an electric enhanced upflow anaerobic sludge bed reaction device. The electric enhanced upflow anaerobic sludge bed reaction device is characterized by comprising a UASB (upflow anaerobic sludge bed) and an electrode group, wherein the electrode group comprises an upper electrode bracket, a lower electrode bracket and N electrodes; N is greater than or equal to 1; the electrode group is put into a sludge reaction zone of the UASB; the tops of the N electrodes are connected and fixed with one another through the upper electrode bracket; the bottoms of the N electrodes are connected and fixed with one another through the lower electrode bracket; and the lower electrode bracket is fixedly arranged at the bottom of the UASB. The electric enhanced upflow anaerobic sludge bed reaction device has the advantages that the anaerobic biological reduction process in the reaction device is strengthened by an electric field; the electric enhanced upflow anaerobic sludge bed reaction device has high efficiency and directionality; accumulation of immediate toxic metabolites is effectively avoided; the anaerobic treatment efficiency is improved; the reaction device is directly introduced into an electrochemical control system; the improved reaction device has the characteristics of being compact in structure, convenient to mount, use and repair, and low in cost, and has profound significance in upgrading and reconstruction of an existing UASB treatment technology; and engineering enlargement is easy to realize.

Electric enhanced upflow anaerobic sludge bed reaction device

The invention discloses a sleeve type microbial dye cell and artificial wetland coupling system suitable for the degradation of azo dyes The system comprises a first water inlet pipeline, an anode area and a sleeve area which are arranged from bottom to top, wherein the anode area is positioned in an anaerobic environment, and an anode electrode is arranged in the anode area; the sleeve area comprises an outer sleeve area, an inner sleeve area and a cathode area; the cathode area is positioned in the inner sleeve area or the outer sleeve area, and a cathode electrode is arranged in the cathode area; the outer sleeve area is internally provided with a second water inlet pipeline; a water outlet area is arranged on the outer sleeve area According to the sleeve type microbial dye cell and artificial wetland coupling system, water enters the system respectively through the anode area and the cathode area, so that the problem of electron competition between azo wastewater and the anode electrode is effectively reduced, the distance between an anode chamber and a cathode chamber is further shortened, the internal resistance of the system is reduced, and the power output of the system is increased Furthermore, due to a sleeve structure, the dissolved oxygen concentration of the cathode area is increased; therefore, the chemical oxygen demand (COD) and the by-product concentration in the effluent are effectively reduced, and the power output and the effluent quality are further improved

Sleeve type microbial dye cell and artificial wetland coupling system suitable for degradation of azo dyes

The invention specifically relates to a disintegration method for excess sludge and application of disintegrated sludge in hydrogen production through fermentation, belonging to the technical field of hydrogen production through biological fermentation. The disintegration method disintegrates the excess sludge through irradiation and alkali coupled treatment and comprises the following concrete steps: adjusting the pH value of the excess sludge to 10 to 12 by using an alkaline solution and carrying out Gamma ray irradiation at room temperature, wherein irradiation dose is 10 to 30 kGy and a radioactive source is 60 Co; and after completion of irradiation, adjusting the pH value of the excess sludge to 7 so as to obtain the disintegrated sludge. According to the invention, through irradiation and alkali coupled treatment, full release of organic components in the excess sludge is promoted; high-efficiency hydrogen production with the disintegrated sludge as a substrate is realized; a cheap and easily available substrate source is provided for the process of biological hydrogen production; and cost for hydrogen production through fermentation is reduced. Compared with the raw sludge, the concentration of soluble COD in a sludge disintegration liquid is increased by 28 to 37 times, the concentration of polysaccharide is increased by 25 to 29 times, and the concentration of protein is increased by 32 to 37 times.

Disintegration method for excess sludge and application of disintegrated sludge in hydrogen production through fermentation

The invention relates to a sewage treatment device based on cryptic growth and energy uncoupling metabolism combination and a sewage treatment method thereof, relating to a sewage treatment device and a sewage treatment method thereof and solving the general problems of bad denitrification and dephosphorization effects and massive excess sludge generation in the prior art. The sewage treatment device comprises a nitration liquid reflux pipe, a nitration liquid reflux peristaltic pump, an ultrasonic-ozone coupling sludge lysis reflux pipe, an ultrasonic-ozone coupling sludge lysis reflux pool, an ultrasonic-ozone coupling sludge lysis reflux peristaltic pump, an excess sludge reflux peristaltic pump, an excess sludge reflux pipe, a secondary sedimentation pool, a water discharge pipe, an excess sludge discharge pipe and a sewage treatment pool. The sewage treatment method comprises the following steps: regulating the parameters and reflux ratio parameters of the sewage treatment pool; starting, and calculating and regulating the parameters of the ultrasonic-ozone coupling sludge lysis reflux pool. The invention relates to the sewage treatment device based on the cryptic growth and energy uncoupling metabolism combination and the sewage treatment method thereof.

Sewage treatment device based on cryptic growth and energy uncoupling metabolism combination and sewage treatment method thereof

The invention discloses a method for reinforcing nitrogen and phosphorus removal in sewage as well as sludge reduction coupling in process, which relates to a method for nitrogen and phosphorus removal in sewage as well as sludge reduction. The method solves the problems of high amount of excess sludge and bad effect of nitrogen and phosphorus removal in a biological sewage treatment utilizing activated sludge method. The method for reinforcing nitrogen and phosphorus removal in sewage as well as sludge reduction coupling in process is implemented according to the following steps of: pumping to-be-treated water in a step aeration reactor and performing sewage treatment, and then discharging to finish reinforcement for nitrogen and phosphorus removal in sewage as well as sludge reduction coupling in process. The method for reinforcing nitrogen and phosphorus removal in sewage as well as sludge reduction coupling in process disclosed by the invention is suitable for the field of sewage treatment.

Method for reinforcing nitrogen and phosphorus removal in sewage as well as sludge reduction coupling in process

The invention relates to a treatment device capable of intensifying degrading of wastewater containing azo dyes by a microbial electric auxiliary system and a water treatment method, belongs to the field of printing and dyeing wastewater treatment and mainly relates to wastewater treatment device and method. The invention aims to solve the technical problem that existing method of treating wastewater containing azo dyes is low in decolourization ratio of wastewater and poor in COD removing capacity. The device provided by the invention comprises a reactor anode collector plate, a reactor cathode collector plate, a reference electrode, a reactor water inlet, a mud discharge opening, a reactor perforated water distributing plate, a return pipe, a return pump, a lead, a water outlet, an anode filler layer clapboard, a cathode filler layer clapboard and a gas collecting opening. The water treatment method comprises the following steps that wastewater enters the treatment device capable of intensifying degrading of wastewater containing azo dyes by the microbial electric auxiliary system through the reactor water inlet; water is discharged from the water outlet to realize water treatment. The method provided by the invention is high in decolourization ratio of wastewater and high in COD removing capacity when used for treating wastewater containing azo dyes.

Treatment device capable of intensifying degrading of wastewater containing azo dyes by microbial electric auxiliary system and water treatment method

The invention provides a method for producing hydrogen by using excess sludge. The method comprises the following steps: a) subjecting the excess sludge to low-frequency ultrasonic treatment so as to obtain hydrogen-producing seed sludge; b) subjecting the excess sludge to hydrolysis so as to obtain a fermentation substrate; and c) mixing the seed sludge with the fermentation substrate and carrying out fermentation; wherein the sequence of the step a) and the step b) is not limited. Compared with the prior art, the method provided by the invention has the following advantages: a hydrogen production rate is high, and cost for production of hydrogen from excess sludge is substantially reduced since special bacteria is not additionally added as hydrogenogen. Experiment results show that the hydrogen production rate of the method reaches 13.03 mL-H2/g-TS.

Method for producing hydrogen by using excess sludge

The invention relates to a method for analyzing and determining the optimum concentration of a composite uncoupler via a response curve surface, which is used for solving the problem of the technical defect of the existing composite uncoupler for decreasing sludge yield. The method comprises the following steps of: (1) determining the effective concentration of a single uncoupler for decreasing the sludge yield; (2) determining the apparent sludge yield rate in different schemes; (3) performing sorting and fitting analysis on the apparent sludge yield rate in the step (2); (4) performing variance analysis and significance analysis on a secondary multivariate regression equation and a regression coefficient; (5) analyzing the relationship of an independent variable X and a response value Y in a secondary multivariate regression model according to a three-dimensional response curve surface and a two-dimensional contour map which are generated by the secondary multivariate regression model; and (6) solving the secondary multivariate regression model by utilizing matlab software. The method is applied to the fields of municipal engineering and environmental engineering.

Yang Shanshan

Papers

Method for reinforcing nitrogen and phosphorus removal in sewage as well as sludge reduction coupling in process

Treatment device capable of intensifying degrading of wastewater containing azo dyes by microbial electric auxiliary system and water treatment method

Method for producing hydrogen by using excess sludge

Sewage treatment device based on cryptic growth and energy uncoupling metabolism combination and sewage treatment method thereof

Method for analyzing and determining optimum concentration of composite uncoupler via response curve surface