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110 results about "Process composition" patented technology

Process theory of composition The process theory of composition (hereafter referred to as "process") is a field of composition studies that focuses on writing as a process rather than a product.

Nitrosobacterium-anaerobic ammonium oxidizing bacteria immobilization and middle-temperature sewage treatment process

The invention relates to a technique of nitrococcus and anaerobic ammonium-oxidation bacteria immobilization and mesothermal sewage treatment, which consists of nitrococcus immobilization technique and anaerobic ammonium-oxidation bacteria immobilization technique and combination of the two techniques is realized in an anaerobic baffled reactor under the condition of 20 to 25 DEG C. Concentration of nitrogen of the inlet sewage is below 100mg L<-1>; nitrite is produced during the middle part by nitrosoation reaction; the rest ammonia is carried out the anaerobic ammonium-oxidation reaction with the nitrite that the nitrogen is produced to get out of the system to ensure the nitrogen in the sewage be high efficiently removed in the mesothermal condition.The invention has the advantages that: (1) environment of vector is in favor of proliferation of biological cell, which can raise the concentration of microbiology which participate reaction to enhance reaction efficiency; (2) under the situation of no consumption of organic carbon source and acid-bases neutralizer as well as decrease of oxygen consumption, biological nitrogen removal can be realized and sewage treatment temperature is lowered to 20 to 25 DEG C, which has great energy-saving benefit.
Owner:TIANJIN UNIVERSITY OF TECHNOLOGY

Blast furnace gas dust removing device and technique by dry method

The invention relates to a blast furnace gas dry cloth-bag dust-removing device and technology, belonging to the metallurgy environmental protection dust removing technical field. The blast furnace gas dry cloth-bag dust-removing device and technology mainly comprise devices such as a dust-removing filtering device, an ash-clearing device, a dust-unloading and transporting device, an automatic control device, a gas dispersion device, and technologies such as large filtering wind speed, nitrogen or pure coal gas pulse current back-blowing and ash-clearing, pneumatic unloading and transporting ash and backup for nitrogen and pure coal gas, wherein, coal gas is filtered and purified by a filtering bag, the ash is back-blown by nitrogen or pure coal gas pulse current so as to control the resistance of the dust remover, thereby the filtering bag has the ideal dust removing effect, which is a dry dust-removing purification system having the advantages of high dust-removing efficiency, low dust content of the pure coal gas, low energy consumption of the dust-removing system, high heat efficiency of the pure coal gas and high automation degree; the filtering bag with over-long specification and a biserial pulse back-blowing system are adopted to meet the requirements of the dust-removing system upon a large filtering area and an excellent back-blowing efficiency; a crude gas bleeding valve group is increased to ensure that the coal gas with overproof temperature can not enter to a case of the dust remover, which protects the cloth-bag, controls effectively the high furnace roof pressure and operates the system more safer; the whole course waterless operation is realized so as to prevent the possibility of water containing coal gas dust to paste the filtering bag, thereby having the characteristics of less occupied area, short technology process, strong ability of clearing the ash, simple equipment and low labor intensity.
Owner:BAOTOU IRON & STEEL GRP

Improved process of activated sludge and biological film composite type A2/O

The invention relates to an improved process for activated sludge and biomembrane composite A<2>O. The improved process consists of three stages of processes, i.e. an anaerobic stage, an anoxic stage and an aerobic stage, and is characterized in that a ciliary biological packing material is added in an aerobic reactor; an ultrasonic treatment device is adopted to carry out cavitated decomposition for residual sludge inside a secondary settling tank so as to form organic substance with liquid solubility; moreover, the sludge is returned to the front end of an anoxic reactor. The improved process adopts the ciliary biological packing material to fix a great amount of nitrifying bacteria of long generation reproduction time, thereby improving the speed of nitration reaction and reducing the influence on nitrifying flora caused by sludge age change; the ultrasonic treatment device is adopted to treat residual sludge, thereby making use of efficient useful substances contained in the residual sludge; meanwhile, the improved process solves the problem of insufficient carbon source during A<2>O technological process, and maintains better denitrogenation and dephosphorization effects for an A<2>O technological system at the same time.
Owner:中钢集团武汉安全环保研究院有限公司

Dye waste water treatment method based on membrane technology

The present invention discloses a method for treatment of dye waste water based on membrane technique, mainly comprising the part of fore treatment of dye waste water and the part of membrane filtration-seperation system. Fore treatment of dye waste water consists of techniques such as exhaust conditioning, flocculating setting and clarifying. Membrane filtration-seperation system consists of techniques such as hyperfiltration circulation and Na-filtration circulation. The invention is a new treatment of dye waste water based on membrane technique, characterized in that the CODCr and PH of the dye waste water is adjusted in the equalizing tank before it enters the membrane filtration-seperation system. Afterwards, the waste water is uniformly mixed in the flocculation retort and then deposits in the flocculation precipitating tank. The clarified solution is disposed by the treatment of hyperfiltration, the hyperfiltration dislysate is disposed by the treatment of Na-filtration, the Na-filtration dislysate is absorbed by the activated carbon, and as a result the water let meets the sewage discharge standard of two-level GB8978-96. The method is especially suitable for treatment of waste water of azo-dyes which is difficult to meet the discharge standard by the conventional waste treatment.
Owner:SANDA FILM SCI & TECH XIAMEN

Method for treating ammonia nitrogen in wastewater by using integrated process

The invention relates to a method for treating ammonia nitrogen in wastewater by using an integrated process, and the method comprises a magnesium ammonium phosphate chemical precipitation process and a membrane treatment process and comprises the processing steps of collecting water, dosing, adjusting the pH (potential of Hydrogen) value, reacting, precipitating and filtering. The method has the technical characteristics that magnesium salt and phosphate are added during the dosing; a NaOH solution is added to regulate the pH to 8.5-10 during the adjustment; during the reaction, the wastewater retention time is greater than or equal to 30 minutes, the ammonia ion in the wastewater is fully reacted to generate magnesium ammonium phosphate precipitates and heavy metal ion is converted into hydroxide precipitates; the precipitation time is greater than or equal to 6 hours to realize solid-liquid separation during the precipitation; and the supernatant liquid enters a membrane treatment system, the reverse osmosis clear water can be directly discharged and the concentrated water returns to a water collecting tank or is subjected to nanofiltration. The method has the advantages that ammonia nitrogen-containing wastewater with various concentrations can be treated; heating is not needed in the treatment process; the ammonia nitrogen content in the effluent can meet the national first grade effluent standard; and the content of other pollutants such as heavy metals and the like in the effluent can be used for achieving the effluent standard. The method is suitable for treating low-biodegradability ammonia nitrogen-containing wastewater and the ammonia nitrogen-containing wastewater of factories without heat resources.
Owner:CECEP L&T ENVIRONMENTAL TECH
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