38results about How to "Wide range of water quality" patented technology

The invention discloses a disposing method of manufacturing waste water of fined terephthalic acid, which comprises the following steps: contacting the waste water and complex extractant; making the CODCr in the waste water not less than 2500ml / L through contacting the manufacturing waste water of fined terephthalic acid and complex extractant; recycling the manufacturing waste water as the technical water; realizing the water circulation; possessing good disposing effect and simple technique with wide applying scale for water quality.

The invention relates to an oil refining sewage treatment technology. Oil refining mixed sewage is sequentially treated by oil removal, air flotation, magnetic separation and biochemical treatment, and then is discharged. On the basis of the original oil refining mixed sewage treatment process flow, the invention adds the step of magnetic separation, which can lighten the load of a secondary bio-chemical treatment device, avoids shock to a biochemical system and greatly improves effluent quality in biochemical treatment. The technology of the invention has the advantages of good treatment effect, wide application range of water quality, stable operation, strong operability, simple flow, small investment, low operation cost, etc.

The invention relates to an ALOAO double-sludge circulation synchronic denitrification and phosphorus removing process. According to the invention, first, pre-treated sludge is delivered into an anaerobic tank; sludge-water separation is carried out in a first sedimentation tank; an obtained supernatant is delivered into a hypoxic reaction tank; sludge obtained by sedimentation in the first sedimentation tank is directly delivered into an anoxic tank, and is mixed with the liquid discharged from the hypoxic reaction tank; the mixture is delivered into a short-time aerobic tank, and is than delivered into a second sedimentation tank; an obtained supernatant is discharged, and a part of the sludge obtained by sedimentation is delivered back to the anaerobic tank; and the rest of the sludge is discharged as residual waste sludge. According to the invention, mixed liquid reflux is designed on the path from the short-time aerobic tank to the hypoxic reaction tank, and the reflux ratio is set according to requirements. The process and the operation control method provided by the invention have relatively broad adaptability to sewage qualities. The method can be used for removing nitrogen and phosphorus with low carbon source and low consumption on oxygen. Therefore, the method is suitable for the reformation and construction of municipal wastewater treatment plants with requirements on nitrogen and phosphorus removing.

The invention provides an annular electrode electrolytic tank, and relates to the technical field of waste water treatment. The annular electrode electrolytic tank adopts the key technology that annular negative and positive electrodes are arranged; the outer ends of negative-positive pole binding posts are fixedly connected with an power cord, the inner ends of the negative poles of the negative-positive pole binding posts are fixedly connected with the negative pole, the inner ends of the negative-positive pole binding posts are fixedly connected with the positive pole, one side of the negative pole is fixedly connected with a water segregator, the water segregator is fixedly connected with a water inlet, the water inlet is fixedly connected with one side of the outer barrel of the electrolytic tank, the other side of the negative pole is fixedly connected with a water collector, the water collector is fixedly connected with a water outlet, the water outlet is fixedly connected with the other side of the outer barrel of the electrolytic tank, and an electrode upper limitation plate is fixedly connected with an electrode can lid; the upper end of the positive pole and the upper end of the negative pole are in embedded connection with the electrode upper limitation plate through buckles, and the lower end of the positive pole and the lower end of the negative pole are in embedded connection with an electrode lower limitation plate through buckles; the electrode lower limitation plate is placed at the bottom of the outer barrel of the electrolytic tank, and the upper end of the outer barrel of the electrolytic tank is connected with the upper end of the outer barrel of the electrolytic tank through a buckle cover. The annular electrode electrolytic tank is used for treating waste water, and is easy to manufacture, high in efficiency, and good in effect.

The invention discloses a thickened oil and super heavy oil chemical sewage treatment system and method. The thickened oil and super heavy oil chemical sewage treatment system comprises a pretreatment unit and a steam compression unit, wherein the pretreatment unit comprises a precipitation device and a preheating device; solid substances and a part of suspended substances in super heavy oil sewage are precipitated by the precipitation device; the precipitation device is connected with the preheating device so as to preheat and raise the temperature of sewage after precipitation treatment; the steam compression unit comprises an evaporation device and a compression device; sewage treated by the pretreatment unit is fed into the evaporation device for evaporation and concentration; the generated steam passes the compression device and is further fed into the evaporation device for heat exchange evaporation. The thickened oil and super heavy oil chemical sewage treatment system and method can be applicable to a wide raw water quality, and the effects of high quality and high efficiency and the purposes of energy conservation and consumption reduction can be achieved.

The invention relates to the field of water treatment, in particular to a method and system for biological denitrification and dephosphorization of sewage. The method comprises the following steps: 1) performing anaerobic treatment on the water body to be treated; 2) performing anoxic treatment on the water body obtained from the anaerobic treatment; 3) performing aerobic treatment on the water body obtained from the anoxic treatment; The water body is subjected to anaerobic treatment; 5) Part of the supernatant of the water body obtained from the oxygen elimination treatment is returned to step 2) for anoxic treatment; 6) Part of the supernatant of the water body obtained from the oxygen elimination treatment is subjected to membrane-based biological treatment; 7) Precipitate the mud-water mixture in the lower layer of the water obtained from the aerobic treatment; 8) return part of the water obtained from the membrane-based biological treatment to step 1) for anaerobic treatment; 9) return part of the water obtained from the membrane-based biological treatment to step 3 ) for aerobic treatment. The invention has good removal effect of total nitrogen and total phosphorus pollutants, simple and convenient operation, low energy consumption, and stable and up-to-standard discharge.

The invention relates to the field of water treatment, in particular to a method and system for deep denitrification of sewage. The method includes the following steps: 1) subjecting the water body to be treated by membrane-based microorganisms; 2) under the catalytic action of nano-metals and hydrogen supported on the carrier membrane, reducing nitrous nitrogen in the water body obtained from the membrane-based microbial treatment to nitrogen gas . The system includes: a first membrane reaction zone for treating water body to be treated with membrane-based microorganisms, and a first membrane assembly is arranged in the first membrane reaction zone; microorganisms are attached to the membrane in the first membrane assembly; A second membrane reaction zone in which nitrous nitrogen in the treated water body is reduced to nitrogen, a second membrane assembly is arranged in the second membrane reaction zone; nano-metals are attached to the membrane in the second membrane assembly; the second membrane reaction zone reacts with the first membrane zone is in fluid communication. The invention realizes short-range nitrification and denitrification, so that the total nitrogen pollutant removal rate of the treated sewage reaches 95%, and the discharge standard of quasi-four types of water is reached.

The invention relates to a preparation method of a tracing type phosphorus-free corrosion and scale inhibitor. The preparation method is characterized in that the tracing type phosphorus-free corrosion and scale inhibitor comprises polyepoxysuccinic acid, a tracing type dirt dispersion agent, organic carboxylic acid sodium salt, a zinc salt, imidazolines, azoles and water, and is prepared by stirring, mixing and filtering the components. The tracing type phosphorus-free corrosion and scale inhibitor disclosed by the invention has the advantages of corrosion inhibition synergistic effect, low dosage, good stability, wide application scope and environment friendliness, and particularly due to the introduction of the tracing type dirt dispersion agent, an obvious synergistic effect is achieved, and the on-line detection on the medicament content is realized by detecting the fluorescence value, so that the problem that a general phosphorus-free medicament can not be detected or is difficult to detect can be solved.

The present invention provides a disposal method for wastewater produced by phthalic acid. The steps are as follows : a. the process wastewater exported from a refining process is filtered; filtrate and a solid-form object are gained; b. the filtrate is sent to and processed in a multi-effect evaporation system; steaming condensation water and condensation water with organic compound are gained; then the steaming condensation water is recycled back to the refining process and is reused; c. solid-liquid mixture is gained by adding acid to the condensation water and precipitating; the solid-form object and the filtrate are gained by processing a solid-liquid separation to the mixture; d. water and various organic compounds are gained by fractionating the filtrate; the water is recycled backto the refining process and is reused; the organic compounds are recycled back to a xylene oxidation process; e. various organic compounds are gained though the combination and re-crystallization of the solid-form object in the step a and the solid-form object in the step c. With the present invention, the majority of the PTA wastewater is capable of being recycled and reused in the production after being disposed; in addition, the majority of the organic compounds in wastewater are reclaimed. So the economical use of the PTA wastewater and the organic compounds in wastewater is realized.

The invention relates to a method for treating waste water from a power plant and a system for realizing the same. The system comprises a pre-treatment system and an evaporative crystallizing system which are connected with each other; the pre-treatment system is connected to the waste water from the power plant, the majority of SS, heavy metals, Mg<2+>, F<-> and sulfate radicals in the waste water from the power plant are removed by coagulating sedimentation, and organic pollutants and ammonia nitrogen are also removed; the CaSO4 content in the waste water is adjusted to be far less than saturated concentration of the CaSO4, and the pH value is adjusted back to make partial CO3<2-> converted into HCO3<->; and the waste water treated by the pre-treatment system flows in the evaporative crystallizing system, by evaporation concentration, the dissolved solids in the waste water reach and exceed the saturated concentration to form salt crystal, and the solid-liquid separation is performed. The method has the advantages of effectively removing suspended matters, organic matters, fluorine and heavy metals in the waste water from the power plant, removing dissolved salt such as Ca<2+>, Mg<2+>, Cl<->, SO4<2-> and the like which can not be removed by the prior method for treating the waste water from the power plant, and basically meeting zero emission, and the treated waste water can be reutilized.