4results about How to "Improve oxygen use efficiency" patented technology

A device and method for treating electron-poor sewage enhanced by iron-carbon sludge membrane based on bubble-free aeration belongs to the technical field of sewage treatment. The present invention solves the problems that the existing membrane oxygen transfer biofilm technology cannot adapt to low carbon-nitrogen ratio sewage, the electron donors generated by the carbon source in the denitrification process are insufficient, and the operating cost of the external carbon source is high. A porous partition plate is vertically fixed in the reactor body, and the inside of the reactor body is divided into an iron-carbon filling chamber and a bubble-free aeration chamber on the left and right by the porous partition plate. The MABR membrane assembly is fixed in the bubble-free aeration chamber and connected to the gas cylinder through an air supply pipeline. An iron-carbon micro-electrolysis filler is arranged in the iron-carbon filling chamber. The water inlet tank is connected to the water inlet of the reactor body through the water inlet pipeline, and the water outlet tank is connected to the water outlet of the reactor body through the water outlet pipeline. The sewage is coupled with the microbial metabolic process of the biofilm attached to the surface of the MABR membrane assembly through the iron-carbon sludge micro-electrolysis process to synergistically remove pollutants in the water.

The application relates to the technical field of waste gas treatment, and discloses a low-temperature plasma catalytic treatment system and method for organic waste gas. The system comprises a first reaction unit, a second reaction unit, a third reaction unit, an ozone generator (18) and a COx filter (19), wherein the first reaction unit is a plasma reactor connected with a high-voltage power supply, the second reaction unit comprises two or more plasma reactors connected with high-voltage power supplies, and the third reaction unit is a reactor provided with a transition metal oxide catalyst. According to the technical scheme, the degradation of VOCs in oxygen-poor waste gas can be realized at a lower operation cost and without changing the gas composition.

This invention discloses an operation control method for achieving deep nitrogen removal in a membrane-aerated biofilm reactor, comprising the following steps: S1. Biofilm cultivation and thickness control; installing a hollow fiber permeable membrane module in the reactor, and controlling the ratio of membrane area to effective reactor volume to be 80-150 m². 2 / m 3 The invention employs the following steps: 1. Establishing a soft sensor for biofilm thickness based on the linear relationship between exhaust oxygen purity and bulk ammonia nitrogen concentration to regulate biofilm thickness; 2. Optimizing the denitrification process of the hybrid MABR process; Immersing the membrane module in anoxic suspended sludge zone, oxygen is transferred from the inside of the membrane to the outside biofilm via a reverse diffusion mechanism, while ammonia nitrogen and organic matter in the wastewater diffuse from the bulk liquid phase into the biofilm, forming an aerobic layer and anoxic layer from the inside out within the biofilm along the oxygen diffusion direction; 3. Deep denitrification and N2O emission reduction. This invention's operation control method reduces process energy consumption, achieves high denitrification rates, and saves energy and reduces emissions; furthermore, the biofilm exhibits excellent stability and extended lifespan.

The application discloses a biological sludge recycling type sewage treatment reaction device, and relates to the technical field of sewage treatment. The device comprises a pool body, the inner part of the pool body is fixedly connected with a first partition plate, a second partition plate and a connecting plate respectively, the pool body and the first partition plate form an anaerobic zone, and the first partition plate, the second partition plate and the pool body jointly form an anoxic reaction zone. In the application, the sludge quality separation and reflux system is matched with the gradient sedimentation assembly through the spiral separator, the reinforced cyclone hydraulic field is formed in the anaerobic zone by means of the spiral flow channel with a narrowing inner diameter from top to bottom, the centrifugal force is used to make the inert sludge and heavy particles with a larger density migrate to the pool wall and sink to the sludge hopper to complete in-situ concentration, the preliminary sludge separation is realized, the separation load of the subsequent sedimentation unit is effectively reduced, the mixed contact of the sewage and the anaerobic sludge is strengthened by the cyclone state water flow, a stable anaerobic environment is created for the phosphorus accumulating organisms, and the phosphorus accumulating organisms are promoted to release phosphorus efficiently.