34 results about "Ammonia assimilation" patented technology

The invention discloses an ammonia-process desulfurization method for chamber-division ammonification. The method is characterized in that an oxidation section comprises an oxidation chamber and an ammonification chamber which are in mutual fluid communication, and an ammonia absorbing agent is added into the ammonification chamber. Preferably, an absorption-oxidation cycle of the method comprises a liquid cycle between the oxidation chamber and a secondary spraying absorption section and a liquid cycle between the ammonification chamber and a primary spraying absorption section, and the mutual series flow of the two cycles is realized at least through fluid communication between the oxidation chamber and the ammonification chamber. The invention further discloses a device for implementing the method.

The invention discloses an on-line continuous detection device for ammonia in gas using chemical spectrophotometry, comprising: a particulate filter, which is arranged at the gas inlet end; a sampling pipe, which is connected with the outlet of the particulate filter; a mixer, which is connected to the outlet of the particulate filter. The outlet of the sampling pipe is connected, and the liquid inlet of the mixer is connected with one end of the absorption liquid circulation pipe; the new absorption liquid storage bottle is connected with the liquid inlet of the mixer through the new absorption liquid replenishing pump; the absorption liquid circulation pump, which is connected with the bottom of the absorption bottle; ammonia absorption pipe, one end of which is connected with the liquid outlet of the mixer, and the other end is connected with the inlet of the absorption bottle; gas-liquid separator, which is connected with the gas outlet at the top of the absorption bottle It is connected with the gas dehydrator, mass flow meter and gas pump in sequence through pipelines; the rich liquid concentrator and the rich liquid diluter are connected in parallel. The on-line continuous detection device for ammonia in gas of the present invention uses chemical spectrophotometry to monitor the ammonia concentration in the gas, and realizes the on-line continuous monitoring of ammonia.

The invention provides an in-situ device for removing ammonia nitrogen in an anaerobic digestion system, which includes an ammonia removal anaerobic digestion tank and an ammonia absorption-circulation system, and the ammonia absorption-circulation system includes a separation membrane module, an acid An absorption liquid storage bottle and a peristaltic pump, the separation membrane assembly includes a separation membrane and a membrane protection layer arranged outside the separation membrane, the separation membrane assembly is arranged inside the anaerobic digestion tank for ammonia removal; The ammonia anaerobic digestion tank is used to hold the anaerobic digestion feed liquid. The device provided by the invention can realize the in-situ removal of ammonia nitrogen in the anaerobic digestion system, remove ammonia nitrogen while performing anaerobic digestion, reduce the inhibitory effect of ammonia nitrogen, and recover ammonia nitrogen.

The invention discloses an automatic ammonia addition system applied to an ammonia desulfurization device. 2 Concentration, outlet flue gas SO 2 The expected concentration automatically calculates the theoretical ammonia addition amount; half of the ratio of the actual ammonia addition amount / actual sulfur dioxide removal amount is used as the theoretical ammonia addition amount correction coefficient to calculate the corrected theoretical ammonia addition amount; through the ammonia addition metering method and the ammonia addition adjustment valve Add the corrected theoretical ammonia addition amount ± 10% of the ammonia absorbent to the ammonia desulfurization device, and then pass the actual SO 2 Concentration and / or actual SO in outlet flue gas 2 The concentration change trend is used as a back feed to automatically adjust the actual ammonia flow rate to realize automatic ammonia addition. The invention also discloses an automatic ammonia addition method applied to an ammonia desulfurization device. The automatic ammonia addition system and method of the present invention can realize automatic ammonia addition while ensuring that the clean flue gas meets the ultra-low emission requirement, the system is stable and reliable in operation, has a high degree of automation and a simple process.

The invention relates to a method for recovering hydrogen and ammonia from synthetic ammonia purge gas by membrane separation-rectification integrated technology and a production device thereof, and the method comprises treatment in the following three units in order: 1) treatment in a high pressure purge gas membrane separation hydrogen recovery unit; 2) treatment in a low pressure purge gas membrane separation hydrogen recovery unit; 3) treatment in an ammonia water rectification unit. The unit 1) and the unit 2) recover hydrogen and generate ammonia water, and the unit 3) recovers liquid ammonia form the ammonia water, and recycles the rectification kettle liquid as water for ammonia absorption. The invention provides a hydrogen ammonia recovery integrated solution scheme for synthetic ammonia industry; compared with hydrogen ammonia ammonia recovery by traditional simple constant pressure recovery methods, membrane separation methods or ammonia water rectification methods, the method of the invention overcomes the problem of incomplete recovery coverage area and the problem of harmful waste liquid waste gas discharge; during hydrogen ammonia recovery, the discharge of ammonia containing waste water is reduced to zero; and the target of maximization of economic benefits and environmental protection benefits is realized.

A heat-resistant bacterium that promotes ammonia assimilation in the process of sludge composting, which is Bacillus mojavensis P2, is preserved in the China General Microorganism Culture Collection and Management Center, and the preservation number is CGMCC NO.14980. The strain can assimilate the ammonium ion in the sludge, reduce the generation and volatilization of ammonia in the sludge, and reduce the pollution of the sludge compost to the environment; moreover, the strain can withstand a high temperature of 65°C.

The invention provides a device and a method for removing ammonia nitrogen in an anaerobic fermentation system. The device comprises a denitrification reaction tank, an ammonia collecting trap and a gas circulation system, wherein fermentation liquor is placed in the denitrification reaction tank; the gas circulation system comprises a gas pump, a gas flow meter, a gas bag and a gas pipe for connecting the whole passage; the ammonia collecting trap comprises a sealed container and an ammonia absorption solution placed in the sealed container; a gas extraction port of the gas pump extracts gas from the gas bag; the gas is sucked into the sealed container from a gas outlet of the gas pump; the ammonia absorption solution in the sealed container treats the gas and then enters the denitrification reaction tank; the gas is fed to the fermentation liquor placed in the denitrification reaction tank, is converged above the fermentation liquor and then is returned to the gas bag; ammonia brought out by the circulation gas when passing through the fermentation liquor is absorbed when passing through the ammonia absorption solution in the sealed container, so as to achieve the purpose of denitrification. The method provided by the invention has the advantages of accurate and reliable test results, easy operation and good repeatability; meanwhile, the device has the advantages of simple construction, low cost, simple structure, long service life and small occupied area.

The method discloses a method for treating high-ammonia-nitrogen wastewater by using formaldehyde as an ammonia absorbent. Adjust the pH value of the ammonia nitrogen wastewater in the process; c. Deamination: absorb the dehydrated deamination membrane through the formaldehyde solution; d. Discharge: classify the deamination wastewater and urotropine generated after the deamination treatment Export; the ammonia nitrogen concentration in the ammonia nitrogen wastewater in the step a is 300-10000mg / L; the heating temperature in the step b is 35-45°C, and the pH value of the ammonia nitrogen wastewater is adjusted to 10-12; the The deamination membrane in the step c is a hydrophobic microporous membrane, and its material is polypropylene, polyethylene, polyvinylidene fluoride or polytetrafluoroethylene; the formaldehyde solution of a certain concentration is that the formaldehyde content in the formaldehyde solution is 3- 8%.

The present invention relates to ammonia transporter genes and use thereof. The invention relates in particular to a brewer's yeast which shows enhanced ammonia assimilation, alcoholic beverages produced using such yeast, and a method of producing such alcoholic beverages. More specifically, the invention relates to the MEP1 gene which codes for the ammonia transporter Mep1 in brewer's yeast, particularly to a yeast which can control the ammonia assimilation ability by controlling the level of expression of the nonScMEP1 gene or ScMEP1 gene characteristic to beer yeast and to a method of producing alcoholic beverages using such yeast.