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309 results about "Large dose" patented technology

Temporary blocking agent, composite blockage removal agent and combined blockage removal method using temporary blocking agent and composite blockage removal agent

The invention discloses a temporary blocking agent, a composite blockage removal agent and a combined blockage removal method using the temporary blocking agent and the composite blockage removal agent, relating to temporary blocking agents, composite blockage removal agents and combined blockage removal methods. The temporary blocking agent, the composite blockage removal agent and the combined blockage removal method are used for solving the technical problems in a polymer flooding process that the difficulty in polymer injection is caused due to the fact that a polymer is subjected to blockage in a porous medium, and when the blockage removal agent is used directly, the blockage removal agent can preferentially enter unblocked stratums and cannot sufficiently unblock blocked stratums are solved. The temporary blocking agent consists of a surfactant and a freeze promoter. The composite blockage removal agent consists of a host and an initiator. According to the combined blockage removal method, the unblocked stratums are blocked in advance by using the temporary blocking agent so as to enable more subsequently-injected large-dose low-viscosity blockage removal agent to selectively enter the stratums required for being unblocked, the well shut-in is carried out for 2-3 days so as to enable the blockage removal agent and blockages to react fully, and then, the aim of unblocking is achieved.
Owner:黑龙江龙之润环保工程有限公司

Organic pollutant enriching device and method for pretreatment of water sample with bulk mass

InactiveCN102062711ASolve the inability to achieve large doses of water samplesSolve processingPreparing sample for investigationPeristaltic pumpWater storage tank
The invention discloses an organic pollutant enriching device and method for pretreatment of a water sample with bulk mass. The organic pollutant enriching device comprises a water storage tank, a peristaltic pump, an enriching column and a valve, wherein the enriching column comprises a glass tube, as well as two layers of glass cotton and a layer of resin which are arranged at the lower end of the glass tube; the resin is arranged between the two layers of glass cotton; water delivery hoses on the upper end of the glass tube are connected with the water storage tank; the lower end of the glass tube is provided with a drain tube on which the valve is arranged; and the water delivery hoses are all connected with the peristaltic pump. The method comprises the following steps of: a. regulating the peristaltic pump to ensure that the adding speed of the water sample is 10-120mL/min; b. introducing the water sample to the enriching column, retaining substances with large particles above the upper layer of glass cotton in the enriching column, and enriching organic matters in the water by using the resin. By means of the device and method disclosed by the invention, the defect that the simultaneous treatment on a water sample with large dose and various samples can not be realized by using a traditional solid-phase extracting device is effectively overcome, meanwhile, different types of organic matters in same batch of water samples can be enriched.
Owner:济南市供排水监测中心

Laying period compound premix capable of improving intestinal health of laying hens, and applications of laying period compound premix

The invention discloses a laying period compound premix capable of improving the intestinal health of laying hens, and applications of the laying period compound premix, belonging to the technical field of feed compositions. A compound enzyme preparation containing beta-mannase, beta-glucanase, acid protease and phytase is used for removing antinutritional factors in soybean meal; yeast cell wall type myeotoxin adsorbents are used for effectively removing mycotoxin which is brought by the use of corn in a large dose and influences the intestinal health; and stomach strengthening acid is used for effectively adjusting the pH value of intestines. Wood dust prepared by using the compound premix provided by the invention has the advantages of soft texture, high cellulose content, intestine scratching prevention and pollution-free properties, and is capable of effectively improving the digestion and absorption functions of laying hens, thereby having good performance in bearing and water absorption. Through systemic and scientific application of the above comprehensive measures, the optimum intestinal health of the laying hens in the laying period is ensured; the immunity and the disease-resistant capability of the laying hens are improved; the best laying performance of the laying hens is achieved; the water content of manure is reduced; and the maximum economic benefits of farms using the premix are obviously improved.
Owner:LIAONING WELLHOPE AGRI TECH

Side-flow circulation BAF (Biological Aerated Filter) intensified dephosphorization system and method for treating urban sewage with the dephosphorization system

The invention discloses a side-flow circulation BAF (Biological Aerated Filter) intensified dephosphorization system and a method for treating urban sewage with the dephosphorization system, belonging to the field of water treatment. The invention aims at solving the technical problems such as poor dephosphorization effect, carbon source loss in pre-dephosphorization, large dosing quantity in post-dephosphorization, large investment in project, restraint to microbiological activity in synchronous dephosphorization and over-high frequency of back wash. The BAF intensified dephosphorization system is internally provided with a reaction tank and a sedimentation tank. The side-flow circulation chemistry-biology combined deep dephosphorization system is used for treating urban sewage. Removal rate of COD (chemical oxygen demand) can achieve 92%-95%, removal rate of total nitrogen can achieve above 80% and removal rate of TP (Tea Polyphenols) can achieve above 95%. Compared with that of single two-stage BAF, the removal rate of TP is improved by 55%-60%; compared with that of post-chemical intensification, the construction investment can be saved and expenditure of chemical agents can be saved by about 10%; and compared with that of synchronous chemical intensification, the period of back wash can be prolonged 6-8 days, therefore, energy consumption is lowered.
Owner:HARBIN INST OF TECH
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