54results about How to "Realize synchronous removal" patented technology

The invention discloses a lightweight slow-release nitrogen and phosphorus removal material and a preparation method and application thereof, and belongs to the field of environment function materialsand sewage treatment. The preparation method comprises the following steps: uniformly mixing cement, pyrite, a foaming agent and a foam stabilizer to obtain dry-mixed mortar; adding water into the dry-mixed mortar, and stirring to prepare the lightweight slow-release nitrogen and phosphorus removal material. The lightweight slow-release nitrogen and phosphorus removal material of the invention has characteristics of high specific surface area, controllable density, high reactivity, easy microbial biofilm formation, slow-release electron donor nitrogen-removal and iron ion phosphorus-removal,etc., can be used as a filling material for sewage treatment fluidized beds and fixed beds, a filling materials for constructed wetlands and in-situ and ex-situ purifying material for polluted water bodies, and has a good purifying effect on pollutants in water, especially on total nitrogen and total phosphorus.

The invention discloses an energy-saving consumption-reducing short-range nitration dephosphorizing coupling technique with synchronous denitrification and a device thereof, belonging to technical field of domestic and industrial sewage treatment. A metal carrier bed is installed in an aerobic section with integrated reaction, and is made of iron wood shaving washed through acid cleaning; and the outer part of the iron wood shaving is covered by wire netting. Under conditions of normal temperature and low dissolved oxygen, the aims of short-range nitration and synchronous denitrification can be realized; an anaerobic section is used for finishing phosphorous releasing; the aerobic section is used for finishing short-range nitration, an anoxic section is used for finishing denitrification for removing phosphorous, a fast aerobic section is used for removing remaining ammonia and nitrogen and phosphorous. The invention uses iron wood shaving with low cost to realize stable accumulation of nitrite; the aerating amount is small, the carbon source is saved, and denitrification for phosphorous removing is carried out by taking the nitrite produced via short-range nitration as electron donor, thus the nitrogen and phosphorous can be removed synchronously; and the problem that the nitrite in water could damage the environment and has toxicity is solved. The invention can realize the aims of saving energy and reducing consumption to the largest extent, and is suitable for purifying and treating domestic sewage continuously for a long time.

The invention discloses a combined multi-level ecological unit system for deeply treating secondary effluent of a sewage plant. The system sequentially consists of a water distribution tank, an ecological pond, a secondary constructed wetland and a submerged plant pond. When the system runs, tail water of a sewage treatment plant sequentially passes through the ecological pond, a subsurface flow wetland, a surface flow wetland and the submerged plant pond, and is purified under the joint action of a filler-microorganism-plant system, and effluent is high in water quality and stable. The system has the advantages of capability of efficiently removing nitrogen and phosphorus, low capital construction cost, no power consumption, convenience for subsequent maintenance and operation and the like, and has a landscaping value, and the aim of deeply treating the effluent can be fulfilled.

The invention discloses a sewage treatment device with a function of removing salt and organic substances synchronously. The sewage treatment device comprises a sewage treatment tank and two composite electrodes, wherein the two composite electrodes are arranged oppositely at an interval and used for being connected with an anode and a cathode of an external power supply respectively; the sewage treatment tank is divided into a salt removing and pollution cleaning chamber and clear water chambers by the two composite electrodes; the salt removing and pollution cleaning chamber is located between the composite electrodes; the clear water chambers are located on outer sides of the two composite electrodes; each composite electrode comprises an ultrafiltration (or microfiltration) membrane layer and a conductive material layer which are arranged in a laminated manner, and the ultrafiltration (or microfiltration) membrane layers of the two composite electrodes are arranged oppositely. The invention further discloses a sewage treatment method with the function of removing salt and organic substances synchronously.

The invention provides a synchronous processing device and method of ship waste gas desulfuration and denitration waste liquid and ship sanitary sewage. The device comprises a suspending area and a filler area. The upper portion of the suspending area is provided with an overflow area communicated with the filler area. A liquid inlet is communicated with the suspending area. A liquid outlet is communicated with the filler area. A stirrer is arranged in the suspending area. Inclined baffles are fixed to the two sides of the inner wall of the suspending area respectively. The filler area is sequentially provided with a ceramic ring layer, an activated carbon layer and a polyethylene multi-surface hollow spherical layer from top to bottom. Mixed liquid of the waste gas washing waste liquid and ship sanitary sewage is pumped in and makes sufficient contact with heterotroph activated sludge with sulfate reducing bacteria as the main part in the suspending area through stirring of the stirrer, and then the mixed liquid enters the filler area from an overflow opening in the upper portion of the suspending area, sequentially passes through all filler layers, makes sufficient contact with abiological membrane and is then discharged out of a water outlet in the bottom of the filler area. By means of the method, no carbon source is added, and the synchronous processing of sulfate and nitrite in the ship waste gas desulfuration and denitration waste liquid and organic matter in the ship sanitary sewage is realized.

A method for low-consumption co-treatment of flue gas desulfurization wastewater and ammonia-nitrogen wastewater comprises steps as follows: (1) flue gas desulfurization wastewater containing sulfateand ammonia-nitrogen wastewater are guided into a mixing tank to be mixed; (2) the pH and the temperature of mixed wastewater are adjusted in the mixing tank; (3) firstly, a biological reaction tank is inoculated with cultured activated sludge, the mixed wastewater is introduced from the mixing tank, microorganisms in the activated sludge take ammonia nitrogen as an electron donor in the biological reaction tank, sulfate is reduced to elemental sulfur, besides, ammonia nitrogen is oxidized into nitrogen, and synchronous removal of sulfur and nitrogen is realized. The problems that the water quality of the flue gas desulfurization wastewater hardly reaches the standard after treatment with conventional physical and chemical methods, the biodegradability is poor and biological treatment is difficult are solved, and co-treatment of two kinds of wastewater is realized.

The invention discloses a desulfurizing and decarbonizing absorbent which comprises complex iron, an organic solvent and organic alkali, wherein the mass content of the iron is 0.3-10 g/L, and the mass content of the organic alkali is 0-100 g/L; the complex ion comprises 1-butyl-3-methylimidazole EDTA-Fe, EDTA-Fe and EDTA ferric sodium salt, the organic solvent comprises dimethyl sulfoxide, polyethylene glycol dimethyl ether, or a mixture of dimethyl sulfoxide and polyethylene glycol dimethyl ether; the organic alkali can be dissolved into the organic solvent and specifically comprises 1-butyl-3-methylimidazole. According to the absorbent, the degradation of a complexing agent is avoided by adopting nonaqueous solution of the complex ion, and the cost of liquid phase catalytic oxidation islowered. Additionally, absorption liquid can be used for physically absorbing carbon dioxide while oxidation absorption of hydrogen sulfide, so that the cost of equipment for absorption is lowered.

The invention discloses acinetobacter and application thereof. The acinetobacter is named as Acinetobacter JQ1004, and the Acinetobacter strain JQ1004 was deposited in China Microbiological Culture Collection Management Committee (CGMCC) on March 06, 2018 under the accession number of CGMCC No. 15414. The acinetobacter is a heterotrophic nitrifying aerobic denitrifying bacterium, can carry out nitrifying and denitrifying by taking organic carbon as a carbon source under the same aerobic condition, and can respectively grow by taking ammonia nitrogen and nitrate nitrogen as nitrogen sources. The acinetobacter disclosed by the invention has the characteristic of high-concentration ammonia nitrogen load resistance, and can be propagated and metabolized under the condition that the ammonia nitrogen concentration is 0-2000 mg/L.

The invention discloses a segmented drainage type short-cut nitrification parallelly-connected anaerobic ammonia oxidation denitrifying phosphorous removal coupled endogenous denitrification device and a method thereof. Municipal sewage firstly enters a short-cut nitrification phosphorous removal reactor, denitrifying glycogen accumulating bacteria ingest the organic matter and store it as PHAs, and phosphorus-accumulating bacteria store internal carbon source and simultaneously release phosphorous; then, phosphorus is absorbed and ammonia nitrogen is converted to nitrite nitrogen under the hypoxia aeration mode, and nitrosated sewage undergoes first water draining and enters an intermediate water tank; and after anaerobic stirring and denitrification, secondary water draining is carried out. A part of raw water enters an anaerobic ammonia oxidation denitrifying phosphorus removal coupled endogenous denitrification reactor, denitrifying glycogen accumulating bacteria store PHAs, and denitrifying phosphorus accumulating bacteria store an internal carbon source and release phosphorous. After the stage, nitrite nitrogen-containing sewage in the intermediate water tank enters the anaerobic ammonia oxidation denitrifying phosphorus removal coupled endogenous denitrification reactor to realize deep nitrogen and phosphorus removal. By the method, municipal sewage deep nitrogen and phosphorus removal with low C/N ratio can be stably realized.

The invention belongs to the technical field of water treatment, and particularly provides a red mud adsorbent and a preparation method and application thereof. According to the red mud absorbent, with alkaline red mud as a material, part of free alkali in the red mud is removed by the effect of washing and precipitation in the process of seawater washing modification, the red mud is then modifiedby a ferric chloride solution, so that the content of iron oxide with an adsorbing effect in the red mud is increased, and thereby the adsorbing capability is increased. According to the red mud absorbent, the preparation cost is low, and the obtained red mud adsorbent has good adsorbing capability on arsenic and fluorine; moreover, after adsorption is completed, the red mud adsorbent can be directly piled up, and subsequent desorption is not needed.

The invention discloses a preparation method of a sodium polyacrylate dispersed ferrous sulfide intercalation layered double hydroxide. The preparation method comprises the following steps: s1, preparing a sodium polyacrylate aqueous solution to obtain a solution A; s2, preparing a layered double hydroxide aqueous solution to obtain a solution B; s3, adding the solution B into the solution A to obtain a mixed solution C; s4, preparing a degassed aqueous solution of FeSO4. 7H2O or FeCl3, so as to obtain a solution D; s5, preparing a Na2S and/or NaBH4 degassed aqueous solution to obtain a solution E; s6, dropwise adding the solution D into the solution C, and stirring to obtain a mixed solution F; and s7, dropwise adding the solution E into the solution F to finally generate a black precipitate, and washing and drying to obtain the sodium polyacrylate dispersed nano ferrous sulfide intercalated layered double hydroxide. Ferrous sulfide dispersed in a sodium polyacrylate solution is intercalated into layered amphiphilic hydroxide, so that ferrous sulfide agglomeration is prevented, metal anions and cations can be synergistically and efficiently adsorbed, heavy metal adsorbing and reduction effects are promoted, and heavy metal toxicity is reduced.

The invention relates to a method for simultaneously removing sulfate and ammonia nitrogen in smelting wastewater. The method for simultaneously removing the sulfate and ammonia nitrogen in the smelting wastewater aims at solving the technical problems of high difficulty in treatment of smelting wastewater containing sulfate, ammonia nitrogen and metal ions and high running cost in the prior art.The method comprises the following steps of pretreating the smelting wastewater by a sodium hydroxide solution twice; adding calcium hydroxide to chemically precipitate; finally, stripping to remove the ammonia nitrogen in the wastewater, so as to simultaneously remove the sulfate, ammonia nitrogen and metal ions. After the smelting wastewater is treated by the method, the removal rate of sulfatereaches 99.99%; the removal rate of ammonia nitrogen reaches 99.52%; the removal rate of total dissolved solids reaches 98.23%. The method has the advantages that the investment is small, the runningcost is low, and the method can be used for the wastewater treatment and circulation utilization.

The invention discloses a method for treating aquaculture seawater tail water based on free radicals generated by photoelectrocatalysis. The method comprises the steps of firstly, preparing an electrode for generating active chlorine by photoelectrocatalysis and an air cathode; and secondly, taking the prepared electrode for generating active chlorine through photoelectrocatalysis as a photo-anode, covering the surface of the prepared air cathode with a layer of copper net, additionally applying 1.1-5.0 V voltage, and achieving seawater treatment. Under the assistance of natural illumination, a certain bias voltage is applied, the photo-anode is subjected to a photoelectrocatalytic reaction to generate Cl2, then HClO is generated, and the HClO can play a role in killing algae and bacteria; the cathode is subjected to an oxygen reduction reaction to generate H2O2, the H2O2 forms OH. under the catalytic action of copper, and the OH. can directly oxidize and remove antibiotics and organic matters; and meanwhile, HClO reacts with OH. to generate a chlorine-oxygen free radical ClO., ammonia nitrogen and antibiotics in the water body are removed through oxidation, and then simultaneous removal of multiple pollutants is achieved.

The invention provides a process and a device for strengthening short-cut denitrification anaerobic ammonia oxidation denitrification and synchronous phosphorus recovery, according to the process, iron powder is added in a short-cut denitrification anaerobic ammonia oxidation reaction area, and acetic acid is adopted to replace a traditional carbon source sodium acetate. When the acetic acid is used as a carbon source substance, the effects of slowing down oxidation of iron powder and accelerating conversion of zero-valent iron to Fe < 2 + > can be achieved, removal of nitrogen is enhanced, meanwhile, effective combination of phosphorus and Fe < 2 + > is guaranteed, blue iron ore with economic value is generated and is adsorbed and recycled by a permanent magnet, and therefore synchronous removal of nitrogen and phosphorus and effective recycling of phosphorus can be achieved. According to the method, the coupling effect of the acetic acid carbon source and the zero-valent iron is utilized to solve the problems that the activity period of the zero-valent iron is short, the phosphorus removal efficiency of the short-cut denitrification anaerobic ammonia oxidation process is low and phosphorus cannot be effectively recycled, extra equipment does not need to be added, and good economic performance is achieved.