6 results about "Carbon nitrogen" patented technology

The application discloses a kind of water carbon nitrogen combined management and yield prediction method of rice-wheat rotation high-efficiency production, including water management, exogenous carbon input, exogenous nitrogen input, water carbon nitrogen combined management system and crop yield prediction method.Water management uses rice low water level dry-wet alternate irrigation and wheat precision quantitative irrigation.Exogenous carbon input and exogenous nitrogen input use self-made straw wet biochar and quick-acting and slow-release urea nitrogen are proportioned and applied.Water carbon nitrogen combined management system is four kinds of water carbon nitrogen application schemes obtained by Meta analysis.Crop yield prediction model based on water carbon nitrogen combined management is multiple linear equation fitting.Rice-wheat system yield prediction model and four kinds of water carbon nitrogen application schemes established by the application can accurately predict yield and optimize management parameters.The application can realize rice-wheat rotation high-efficiency production, reduce nitrogen, save water and increase yield, and has significant economic and environmental benefits.

The utility model belongs to nitrogen carbon nitrogen (NCN) chemical industry solid by -product resource utilization equipment technical field, concretely relates to a kind of selective leaching system of dicyandiamide residue. Including acid leaching reaction system, it mainly includes dosing machine, acid leaching reactor and first solid-liquid separator connected in turn, acid leaching reactor is connected with ligand storage tank and acid liquor storage tank, the outlet of ligand storage tank is connected with ligand metering pump, the outlet of ligand metering pump is connected with the import of acid leaching reactor. The acid leaching reaction system of the application, by setting ligand metering pump and ligand storage tank, add organic complexing agent to reaction system, can adjust solution complexing balance, make calcium ion preferentially dissolve and reduce the dissolution degree of iron ion, improve calcium leaching rate, reduce iron leaching rate, the iron ion content in obtained leaching solution is lower, can reduce subsequent iron removal processing step.

The present application relates to sewage biological treatment technology field, disclose a kind of short-cut nitrification long-term no sludge stable control nitrite oxidation bacteria operation strategy.This strategy uses high concentration inoculation sludge by anaerobic fermentation, fast sludge discharge, sludge is repopulated to realize short-cut nitrification start, obtain high activity AOB sludge;By retaining / inoculating predatory microorganism, combined with anaerobic hydrolysis to destroy biofilm, trace element strengthens predatory effect, realize long-term accurate control to NOB under no sludge condition;While regulating and controlling DO, FA and other environmental factors, maintain the dominant position of AOB.The present application can realize short-cut nitrification reactor 400d above no sludge stable operation, AOB abundance is stably above 30%, nitrite accumulation rate maintains above 90%, NOB abundance is controlled below 0.01% and activity is difficult to detect;With the characteristics of simple operation, economic and efficient, strong impact resistance, adapt to low carbon nitrogen ratio municipal sewage denitrification, can be coupled with anaerobic ammonia oxidation process to realize efficient denitrification, suitable for existing water plant original transformation.

The application discloses a kind of bacteria agent of preserving fertilizer and increasing yield, coal gangue carries bacteria compound biofertilizer and preparation method thereof, belong to compound bacteria agent technical field.The bacteria agent of preserving fertilizer and increasing yield is bacillus velezensis, pseudomonas stutzeri and aspergillus niger, and the cell quantity ratio of the three is 1.5~2.2:1~1.6:0.5~1.2.The bacteria agent strain mutualistic symbiosis, cross-border synergistic adaptation, metabolic complementation, signal transmission is smooth, can form stable carbon nitrogen phosphorus metabolic cycle, and the function of bacterial flora is stable, and the effect of preserving fertilizer and increasing yield is excellent.