110 results about "Water ph" patented technology

A method and apparatus for treating radioactive waste water containing contaminating ions, colloids and suspended solids having like (usually negative) charges preventing their precipitation. An electric current is passed through the waste water in an EC assembly to cause electro-coagulation of the contaminants and anodes of this assembly are made of a metal that dissolves to provide cations for neutralizing the negative charges and forming precipitates containing neutralized contaminants. Precipitates are then separated from waste water by an electro-magnetic or other filtering unit. The water pH and conductivity may be adjusted before the EC assembly and additives may be introduced into its effluent for enlargement of precipitate particles, improvement of filtration, improvement of dewaterability, and/or enhancement of magnetism.

The invention relates to nuisance free large-size river crab ecological breeding method. The method comprises: exposing breeding pool in sun after drainage, fertilizing the pool, planting aquatic grass, migrating seashell for mixed breeding, determining breeding density according to a certain quality and quantity proportion, choosing uniform size ,vigorous individual, regulating and controlling the water quality, insuring oxygen content and the slight alkalinity of water pH. The pool has optimal breeding density, crabs are not influenced by disease, and antibiotics is not needed.

The present invention belongs to the waste water treating technology utilizing sulfate reducing bacteria. Upwards flowing anaerobic composite bed bioreactor and mixed sulfate reducing bacteria are used in treating acid waste water containing Cr2O72-, CrO42-, Cu2+, Zn 2+, Mn2+ and other heavy metal ions. The present invention has high activity of sulfate reducing bacteria and high waste water treating efficiency. The present invention features that inside the reactor or waste water tank, simple substance iron is added to result in waste water pH value of 5.5-8.5, and that the biochemical reaction is performed at 25-30 deg.c. The present invention has the advantages of addition of simple substance iron, raised waste water pH value, improved bacteria living environment, high metabolic activity of the bacteria, reinforced capacity of the sulfate reducing bacteria, raised bacteria adaptability and waste water treating capacity.

The invention discloses a method for improving an ionic rare earth extraction rate and mine tailing safety. According to the characteristics of ionic rare earth ore, 1, most of rare earth is subjected to extraction according to a ratio of rare earth raw ore to a nearly neutral ammonium salt ore-leaching agent and then an acid sulfate ore-leaching agent is supplied so that rare earth having high leaching difficulty is extracted by leaching, rather than at the beginning, a pH value of the ore-leaching agent is adjusted to less than 4, and 2, after acid sulfate ore-leaching agent-based extraction, tailings are cared respectively by water and a lime milk aqueous solution so that residual acid in the ore is neutralized and adsorbed excess ammonium is transferred to the solution and thus ammonium residues in the tailings are reduced and an ammonium recovery utilization rate is improved. Through the method, rare earth extraction efficiency is improved by 2-30% and the rare earth extraction efficiency is related to content of difficult exchange ingredients in ore, ammonium consumption is reduced by about 20%, content of rare earth and ammonium residues in mine tailings is reduced by above 50%, and content of rare earth, ammonium, uranium and thorium in mine tail water is reduced by above 70%. The method guarantees a tail water pH value of 7 and reduces risk of landslip caused by mine tailing puffing.

The invention relates to a method for relieving anaerobic ammonium oxidation system salinity shock with betaine as an additive. According to the invention, a successfully started anaerobic ammonium oxidation SBR reactor is used for processing salt-containing wastewater, wherein a volatile suspended sludge concentration is maintained at 6-9g/L, an inlet water NH4<+>-N concentration is 180-220mg/L, and the molar ratio of NH4<+>-N to NO2<->-N is controlled at 1:1-1:1.32 through adding (NH4) 2SO4 and NaNO2; the betaine concentration in the reactor is maintained at 0.1-5mmol/L through adding betaine; with a heating band, the temperature of the reactor is controlled at 30-35 DEG C; DO is controlled at 0-0.1mg/L; inlet water pH is stabilized at 7.0-8.5 through dropping NaOH/HCl; anoxic stirring is carried out for 4-8h after water feeding; when stirring is finished, the material is allowed to stand and to precipitate; when precipitation is finished, a supernatant is discharged. With the method provided by the invention, anaerobic ammonium oxidation activity recovery time when the anaerobic ammonium oxidation system is under salinity load shock can be effectively shortened, nitrogen removal rate can be improved, and a higher total nitrogen removal rate can be realized.

The invention provides a semi-coke waste water pretreatment method based on a Electro-Fenton oxidization technology, which comprises the steps of: using an efficient graphite gas diffusion electrode as a cathode, and using a stainless steel plate as an anode to form an electrochemical oxidization system, controlling such conditions as current density, pole plate distance, waste water pH value andventilatory capacity, to enable the filled air to generate hydrogen peroxide in the cathode region, and forming a Fenton reagent through the Fe<2+> generated by anode electrolysis so as to generate ahydroxyl radical with strong oxidability to oxidize and degrade the organic pollutants, greatly reduce the waste water COD (chemical oxygen demand), improve the biodegradability of the waste water inthe successive processing process, fully remove the pollutants and improve the removal rate; and the pretreatment method provided by the invention is also suitable for the electrolytic treatment process of non-biodegradable organic waste water of spinning, dyeing and the like.

The invention relates to an anoxic/aerobic, two-stage, internal- electrolysis organic waste water treating method, fully mixing iron chips and activated carbon/copper chips in a certain mass ratio, and placing their mixture into a reactor, regulating waste water pH value and then adding the waste water into the reactor in the fixed solid-liquid ratio, firstly making anoxic internal electrolysis reation for a certain period of time and then making aerobic reaction for a certain period of time, adding alkali in the effluent water to make mixing coagulation settlement and discharging supernatant. And the treating mode can adopt a single- groove static flow mode or double-groove continous flow mode. And it fully uses redox reaction to degrade organic matters, and has stronger ability to degreade organic matters difficult to degrade and more remarkable decoloring effect.

The invention provides an anaerobic biological treatment method of heat-engine plant desulphurization waste water, and relates to the field of heat-engine plant wet flue gas desulfurization waste water treatment. A sulfate reducing bacteria (SRB) anaerobic biological treatment method is used for treatment of the heat-engine plant desulphurization waste water, SO4<2-> is reduced into H2S by use of SRB, dissolved form S<2-> reacts with heavy metals in the waste water to produce a sulfide precipitate meanwhile to achieve the purposes of removal of the SO4<2-> and the heavy metals in the waste water and improvement of discharged water pH value. By the sulfate reducing bacteria (SRB) anaerobic biological treatment method, up-to-standard release of the SO4<2->, the heavy metals, COD (chemical oxygen demand) and the discharged water pH value of the desulphurization waste water can be realized. The anaerobic biological treatment method is simple in technology process and high in sulfate and heavy metal removal efficiency, and can significantly improve the discharged water pH value, effectively solves the problems of complex operation, high treatment cost, low tendency to cause secondary pollution and the like of a traditional physical and chemical treatment method, and has good economic and environmental benefits.

The invention discloses an efficient treatment method for electroplating nickel-containing waste water.The method comprises the following steps that 1, under the acidic condition, the electroplating nickel-containing waste water is subjected to a microelectrolysis reaction in a microelectrolysis reactor till the pH value of the electroplating nickel-containing waste water ranges from 4.0 to 5.0; 2, an oxidizing agent is added, and the electroplating nickel-containing waste water is subjected to secondary microelectrolysis in the microelectrolysis reactor continuously; 3, an alkaline solution is added, and the pH value of the electroplating nickel-containing waste water ranges from 9.5 to 11.0; 4, coagulant and flocculant are added to the electroplating nickel-containing waste water in sequence for coagulating sedimentation, and final supernate is treated waste water capable of being discharged.The efficient treatment method for the electroplating nickel-containing waste water is easy to operate and stable in effect, chemicals such as a heavy metal chelating agent and sodium sulfide which are bad for the environment do not need to be added, and secondary pollution to environment is avoided; the occupied area is saved, the requirements on reaction conditions are low, the waste water pH can be increased in the reaction process, the alkali quantity needed by follow-up alkali adjustment is decreased, and a product obtained through treatment can be recycled.

The invention discloses a preparation method of load-type metal phthalocyanine catalyst, comprising: directly dipping a molecular sieve into phthalocyanine aqueous solution of which the molar volume density is 10-500 mu mol/L; adjusting the pH value to be 10-12; dipping at room temperature; stirring at interval; and centrifuging and drying to prepare the load-type metal phthalocyanine catalyst. The invention discloses an application of the catalyst in removing organic pollutants in water. The load-type metal phthalocyanine catalyst prepared with the invention has simple method, environment protection and low cost, the catalytic activity thereof is far higher than that of unloaded phthalocyanine catalyst, and the reaction condition is moderate and is not limited by waste water pH value. The load-type metal phthalocyanine catalyst does not generate secondary pollution, can be used for oxidation treatment of organic waste water systems and has industrial application prospect.

The microbe treating process of high concentration chromium containing waste water includes culturing microbe in culture medium containing C, N and P in the ratio of 100 to 1-5 to 0.1-1 at temperature of 15-50 deg.c pH 7-8 and growth period of 24-48 hr; controlling the waste water pH value in 2-4; mixing waste water with microbial liquid for biochemical reaction for 30 min, flocculating with PAM flocculating agent, depositing to separate, filtering, and draining or reusing; and treating separated sludge with acid, filtering and draining or recovering. The said process makes the high concentration chromium containing waste water reach the draining standard while recovering Cr, Zn, Fe and other metals.

The invention discloses a process method for treating mine acidic waste water. The method comprises the steps of performing primary precipitation, performing primary filtration, performing secondary precipitation and performing secondary filtration. By the method, the pH value of the mine acidic waste water can be regulated to 6 to 8, the national standard of the mine waste water pH emission is achieved, and the antimony content of the antimony well waste water can be reduced below 0.5 mg/L provided by 'Guizhou Province Environmental Pollutant Emission Standard'. The method has a good effect of treating the heavy metal mine waste water.

The invention provides an electroplating waste water zero discharge system and relates to the technical field of sewage treatment. The bottoms of a nickel-containing waste water regulating pool, a nickel-containing waste water PH regulating pool, a nickel-containing waste water buffer pool, a nickel-containing waste water coagulating pool, a nickel-containing waste water flocculating pool and a nickel-containing waste water settling pool are connected with a nickel-containing sludge concentration pool through pipelines; the nickel-containing sludge concentration pool is connected with a nickel-containing sludge compressor; concentrated liquid in the nickel-containing sludge compressor is connected with the nickel-containing waste water regulating pool through a pipeline; a phosphorus-containing waste water regulating pool, a phosphorus-containing waste water PH regulating pool, a phosphorus-containing waste water reaction pool, a phosphorus-containing waste water coagulating pool, a phosphorus-containing waste water flocculating pool and a phosphorus-containing waste water settling pool are connected through pipelines. The electroplating waste water zero discharge system is high inremoval rate of pollutants and stable to operate, reasonably utilizes an advanced membrane technology, reduces membrane blockage, guarantees the service life of the membrane, increases the water production rate of the membrane, can reduce evaporation cost and has higher practicability.

This invention belongs to flocculating agent field. It is especially used to process flocculating agent of spray painting waste water and its application. Flocculating agent of spray painting waste water, of which characteristic is: it is made up of DZ-11 flocculating agent and DZ-12 polycoagulant. Wherein, DZ-11 has strong charge neutralization function. It can quickly neutralize oil paint particle electric charge, and remove glutinosity; DZ-12 polycoagulant has strong condensation, which can gather oil paint particle that lose glutinosity; proportion by weight of DZ-11 flocculating agent and DZ-12 polycoagulant is between 0.5-2:1. Spray painting waste water method, of which characteristic is: independently deposit above DZ-11 flocculating agent and DZ-12 polycoagulant, dissolve respectively, and utilize at then same time; adjust waste water PH to 8.5-10.5, add DZ-11 flocculating agent which is 5-8% of paint content of waste water at circulating water pump entrance; decrease glutinosity of circulating water that contains paint by using spray painting flocculating agent, add DZ-12 polycoagulant which is 6-10% of paint content of waste water at circulating water pump exit.

The invention relates to a DCS control method for adjusting an alkaline waste water pH. The method comprises 1, reading three parameter values, 2, calculating acid gas addition flow, 3, inputting the flow calculated value and 4, comparing the current detected pH and preset calculated pH, if the current detected pH is equal to the preset calculated pH, feeding the alkaline waste water subjected to pH adjustment into the next process so that the current process is finished, and carrying out the above circulation from the step 3. The DCS control method for adjusting the alkaline waste water pH realizes easy control of alkaline waste water pH adjustment, reduces a safety risk, prevents liquid acid corrosion and safety problems, reduces an operation cost and has substantial environment and economic benefits.

A composite water-deoxidizing agent as a kind of compositve water treating agent consists of ammonium sulfite 15-40 wt% and organic amine 0-10 wt% beside the rest of water. It is used in water treatment of steam boiler and can reduce oxygen content in water from 0.1-0.4 mg/l to less than 0.01 mg/l and raise water pH value from 7.0-7.5 to 8.3-9.0. The treated water has no corrosion to pipeline and no damage to oil layer. Its ammonium sulfite may be produced by absorbing SO2 in waste gas with ammonia water, and this can protect environmental and reduce water treating cost. The composite water deoxidizing agent of the present invention has high deoxidizing effect and reduced corrosion to pipeline.

This scrubber (40) is provided with: a water storage section (42) for collecting rinsing solution sprayed from spray nozzles (41) and storing same and discharging some of the stored rinsing solution to the outside; a neutralizing agent-injecting device (44) for injecting a neutralizing agent in the flow channel of a circulation pipe (43); and a control device (70). The control device (70) determines the amount of neutralizing agent to be injected from the neutralizing agent-injecting device (44) on the basis of the difference between the pH value of the rinsing solution sprayed from the spray nozzles (41) and the specified target spray pH value and the difference between the pH value of the rinsing solution stored in the water storage section (42) and a specified target stored water pH value.

The invention provides a method and a device for regulating pH of drinking water in drinking water treatment equipment as well as the drinking water treatment equipment. The method comprises the steps of receiving a human pH, sent by a wearable device worn by a user, of the user; determining a first drinking water pH matched with the human pH of the user; regulating the pH of the drinking water in the drinking water treatment equipment according to the first drinking water pH. According to the technical scheme, the pH of the drinking water in the drinking water treatment equipment can be regulated to be suitable for the user to drink according to the human pH of the user.

The invention provides a method for enhancing anammox activity by adding manganese dioxide. The method includes: adopting an upflow anaerobic sludge bed reactor, taking anaerobic ammonium oxidation granule sludge as the inoculation source, taking simulation wastewater containing ammonia nitrogen and nitrite nitrogen as the influent water, also adding an inorganic salt buffer solution and trace elements maintaining microorganism growth, after stable operation under anaerobic and dark conditions with a temperature of 35+/-1DEG C, an influent water pH of 7.70-7.80, and a hydraulic retention timeof 0.9-1.0h, adding manganese dioxide into the influent water of the reactor in a phased increasing way, performing culture until the activity of the reactor sludge is 2.4-2.6 times that of inoculatedsludge, thus completing culture. The anaerobic ammonium oxidation granule sludge culture by the method provided by the invention has the advantages of high activity, good nitrogen removal performance, high microorganism concentration and the like.