34 results about "Water productivity" patented technology

The invention relates to a process for recovering the materials separated by a dye and pesticide wastewater reverse-osmosis and nanofiltration combined membrane, comprising the following steps that: the wastewater to be treated in a reservoir enters a medium filter after pressurization; the filtrate of the medium filter enters a microfilter; the filtrate of the microfilter enters a counter-osmosisdevice after the pressurization; a concentrated solution trapped by the counter-osmosis device enters a nanofilter for separation, dyes, pesticides and related intermediates are recovered from the flowed out liquid; and penetrating fluids of the counter-osmosis device and the nanofiler are mixed and collected. The process can be directly amplified in the engineering application; the membrane technology combined process is adopted to test active red printing and dyeing wastewater in a chemical plant, the rejection recovery rate of the dyes is more than 99.0 percent and the water yield flux after continuous operation of the membrane for four hours is more than 25L / (m<2>.h). The process is adopted to treat the imidacloprid and salicylal wastewater of an insecticide factory, the material recovery rate is more than 70 percent, the salt rejection is more than 90 percent, the removal rate of COD is more than 70 percent and the water productivity is more than 95 percent.

The invention discloses a water-flooded layer (i.e. an oil layer water subjected to absorbing water) water productivity quantitative forecasting method and a system thereof. The method comprises the following steps of: establishing a relation chart of the water productivity surplus rate 1-fw of different periods since the investment development of an oil deposit to injection pore volume multiple N1 according to the original water productivity data fw, accumulated water injection rate Wi and oil layer pore volume PV of the oil deposit; and finding the corresponding water productivity data fw according to the relation chart and the current water-flooded layer injection pore volume multiple N2 of the oil deposit, and working out the water productivity data fw corresponding to the injection pore volume multiple N2 of the current water-flooded layer according to a fit computational formula. The system comprises a relation chart establishing module, a computation module and a forecasting module. The water-flooded layer water productivity forecasting accuracy and timeliness can be improved, and the water-flooded layer water productivity forecasting range is broadened by the forecasting method and the system thereof.

The invention discloses a device for quickly adjusting the water impingement of granular materials by using vacuum. The air shutoff device is communicated with the lower end of the shell of the grain spray watering mechanism, the upper end of the shell of the grain spraying water mechanism is communicated with the lower end of the grain inlet section, and the lower end of the hollow silo passes through at least one high airtight The air shutoff device is communicated with the upper end of the grain outlet section; the body wall of the hollow silo is provided with an evacuation pipe. The grain spray watering mechanism includes a casing, a feeder and a water mist nozzle, and a swirl plate is arranged on the outer surface of the feeder, and a secondary swirl plate is arranged on the inner wall of the casing below the feeder. Make the grain evenly rotate and fall, and improve the water effect. The invention has the advantages of simple structure, low energy consumption, good water infiltration effect and high working efficiency, wide application range and good economic and social benefits.

The invention discloses a method for optimizing the water productivity of crops in saline farmland, which comprises the following steps: 1: combining crop evapotranspiration, setting no less than 3 groups of irrigation and rinsing water volumes, and calculating the leaching ratio; 2: measuring irrigation water Conductance, salt tolerance threshold and yield reduction coefficient of crops, combined with the leaching ratio to determine the degree of yield reduction; 3: Analyze the unit water productivity of saline farmland crops according to the leaching ratio, evapotranspiration, and yield reduction degree; 4: Determine the leaching ratio of multiple groups According to the relationship between the unit water productivity of the corresponding saline farmland crops, three fitting coefficients are obtained; 5: Determine the maximum unit water productivity and the optimal leaching ratio of the saline farmland crops according to the fitting coefficients; 6: According to the best The rinse ratio determines the optimal irrigation rate. The invention reduces the difficulty of optimizing the water productivity of farmland crops, requires fewer parameters and is simple and easy to measure, thereby effectively saving the irrigation amount per unit area of ​​saline farmland and increasing crop yield.

The invention relates to a portable drinking water device suitable for filtering bad water bodies and seawater desalination ， It includes a water production pump, a water production operation device, a primary purification unit and a secondary purification unit arranged in the water production pump, the primary purification unit includes a filter element, the filter element includes an inner core and a microfiltration membrane, and the inner space of the filter element is Constitute the first-level channel for water supply, in particular, the filter element is arranged outside the first cylinder of the water-producing pump and connected to the water inlet of the first cylinder through the first pipeline, and the first-level channel communicates with the water inlet; Should The raw water dispenser also includes a water storage bucket communicated with the water outlet of the first cylinder through the second pipeline, RO The reverse osmosis device and the high-pressure water gun, the high-pressure water gun passes through the third pipeline and the fourth pipeline and the water storage barrel and the water tank respectively. RO The reverse osmosis device is connected, and the high-pressure water gun can provide water through RO The pressure required by the reverse osmosis unit. The drinking water dispenser of the present invention is also suitable for harsh water bodies and seawater, and has high water production efficiency and is not easy to be blocked 。

The invention relates to the technical field of urine recycled water treatment, in particular to a treatment method for purifying urine recycled water. The treatment method for purifying the urine recycled water comprises the steps of utilizing a composition of peroxysulphate and concentrated sulfuric acid as a pretreatment agent for pretreating urine; carrying out reduced pressure distillation oratmospheric distillation treatment on the pretreated urine. Compared with the original urine, the water productivity of a distillate exceeds 91.2 percent, meanwhile, 94.11 percent or more of salt and95.6 percent or more of organic matters in the urine can be removed, and a strong technical support is provided for water recycling treatment of the urine.

The invention relates to a method for cultivating tiger squid in a small northern shed. The method includes selection and transformation of earthen ponds, feeding mysis and white prawn with eggs, feeding bait for mixed culture of mysis and white shrimp, and throwing fertilized eggs of tiger squid , Cultivation of young crows, polyculture of prawns in earthen ponds and polyculture of prawns with bait. The method of the invention introduces mysis, white shrimp and cuttlefish into the same culture pond, improves the stability of the ecosystem, and effectively controls the disease of white shrimp At the same time, make full use of the water body, improve the productivity of the water area, and increase economic benefits. It is suitable for promotion in outdoor shrimp ponds in northern China and promotes the industrialization of northern tiger squid farming.

The invention discloses a remote sensing evaluation method of crop water use efficiency at the farmland scale. Based on the evapotranspiration ET and the total primary productivity GPP of the whole growth period retrieved by remote sensing, combined with effective rainfall data, the water productivity WP of the crop is The main control indicators, through the establishment of crop water consumption-crop total primary productivity model and crop water consumption-water productivity model, determined the appropriate water consumption range for the whole growth period of crops, and finally established a field-scale crop water use efficiency remote sensing evaluation method. The invention effectively makes up for the deficiency of regionalized application of field test research results, and realizes the objective evaluation of the effect of water use on the farmland scale from space.