480results about How to "Reduce organic content" patented technology

The invention relates to a process for biologically treating wastewater with sulfate and hydrochloric acid and recycling elemental sulfur, belonging to the technical fields of environmental protection and wastewater treatment, which is characterized in that in the process, the sludge acidic fermentation products from a wastewater treatment plant is used as carbon source sulfate reducing bacteria for treating acidic sulfate wastewater and recycling the elemental sulfur; the sulfate reducing bacteria SRB in an anaerobic biological reactor reduces sulfate SO4<2-> creature as hydrogen sulfide H2S of colorless sulfur bacteria CSB in an aerobic biofilm reactor reduces H2S or S<2->creature as the elemental sulfur and then the obtained substance is filtered and sand-scrapped by a slow sand filter; the elemental sulfur S in sand filtering material is completely dissolved by an extraction equipment; the extractant CS2, the sand filtering material and the biofilm are separated by a solid-liquid separator; the extracted solution is distilled by a distillation equipment; the distilled solution is parched by a drying device and then the elemental sulfur is recycled.In the invention the mine wastewater with the sulfate and the hydrochloric acid is treated; the elemental sulfur is recycled and the sludge from the wastewater treatment plant achieves resource utilization and harmlessness.

A method for treating a wastewater stream containing organic material or inorganic material comprising passing the wastewater stream to an anode or a cathode of a bioelectrochemical system to thereby alter the pH of the wastewater stream to: a) reduce the pH of the stream passed to the anode to minimise or suppress precipitation of dissolved cations; or b) increase the pH of the stream passed to the cathode to produce an alkaline stream; or c) reduce the pH of the stream passed to the anode to produce an acid containing stream. In one embodiment, a caustic soda solution is produced at the cathode and recovered for storage and subsequent use.

The invention relates to a preparation method of paper pulp, and further relates to a method for preparing the paper pulp through a biological enzyme method. The technical scheme is that the method comprises the following steps of: one, segment cutting; two, puffing; three, heat preservation fermentation; four, shoving; five, pulp washing; six, pulp selecting, wherein screened out coarse residues are put into the step three for fermentation again; seven, pulp grinding; and eight, screening, wherein the screened out pulp residues are put into the step seven for pulp grinding again. Compared with the prior art, the method has the advantages that the pulping and papermaking through the biological enzyme method has the characteristics of 'three highs and three lows' compared with the conventional process technology.

The invention discloses a preparation method of a magnetic antiphase demulsifier. The preparation method is characterized by firstly, preparing monodisperse ferroferric oxide magnetic microspheres by a hydrothermal method; secondly, coating a layer of thin silicon dioxide on the surfaces of the monodisperse ferroferric oxide magnetic microspheres, synthesizing magnetic microspheres with nuclear shell structures, performing group functional modification on the nuclear shell magnetic microspheres by using a silane coupling agent KH560; at last, performing grafting reaction by using the activity of functional groups and an antiphase demulsifier to obtain the magnetic antiphase demulsifier; the magnetic antiphase demulsifier prepared by the preparation method can improve the efficiency of original antiphase demulsifiers and has the characteristics of easy separation, high oil removing rate, obvious separation effect to oil-containing sewage, little use amount and high efficiency.

The invention relates to a method for processing waster water by fenton oxidation, comprising the following steps: (1) enabling alkaline waste water to be processed to enter a flocculation pond so as to be flocculated and precipitated; (2) enabling the flocculated waste water to enter an oxidation pond so as to be oxidized for fenton oxidation reaction; (3) enabling oxidized waste water to enter a precipitation pond so as to be precipitated; (4) adding alkali to supernatant discharged from precipitated waste water to adjust the pH value of the waste water till the waste waster is neutralized, and directly discharging the waste waster or processing the waste water by the next step; and (5) enabling acid precipitate obtained in the step (4) to return to a mixer in a refluxing way to be mixed with total or part of waste water to be processed. With the method for processing waster water through fenton oxidation, the consumption of acid and the alkali can be greatly reduced and content of salt in the waste water can be reduced so that the waste water processing effect is obviously improved.

The invention relates to a way to remove the pollutant in water by water treatment chemical together with the microray. It is a kind of water treating method which solved the problem of long reacting time and large dosage of oxide in treating the water pollutant. It's realized by the following steps: (1)determine the content of the pollutant; (2) the ratio of the water treatment chemical to the pollutant is 1-10:1; (3) adjust the Ph value of the water; (4) treat the polluted water with water treatment chemical as well as microray; (5) separate the solid substance from water to get purified water. Compared to the traditional method, the dosage of the oxide is 30% less in the invention, the removal rate of ammonia nitrogen is 10-60% higher in the invention than the treatment with only ferri-salt; the degradation rate of the natural organic humic acid has been increased by 20-40%; the hard-to-degrade organics (such as nitrobenzene) removal rate has been increased by 30-50%; the invention has many advantages such as low cost and reliable operation it has extensive applying prospect in water treatment domain.

The invention discloses a productive technology of vanlillin by a glyoxylic acid method. The productive technology comprises a synthesis process, a fractionation process and a purification process, wherein the synthesis process comprises condensation treatment, oxidation treatment and decarboxylation treatment of methyl catechol and glyoxylic acid. The productive technology particularly comprisesthe following steps: respectively converting the methyl catechol and the glyoxylic acid into guaiacol sodium and sodium glyoxylate in a sodium hydroxide system; carrying out condensation treatment onthe guaiacol sodium and the sodium glyoxylate; after recovering the unreacted methyl catechol in a condensation liquid, carrying out oxidation treatment, namely carrying out catalytic oxidation on anethanol group in 4-hydroxy-3-methoxybenzene sodium glycolate by using copper oxide in the sodium hydroxide system to form a ketone group, thereby generating a corresponding ketonic acid compound; after separating red copper oxide particles from an oxidation liquid, carrying out decarboxylation treatment, namely using sulfuric acid to acidize the oxidation liquid, and simultaneously converting an acid group in the ketonic acid compound into carbon dioxide so as to generate 4-hydroxy-3- methoxybenzaldehyde; and carrying out the fractionation process and the purification process to obtain the vanlillin.

The invention relates to a light-weight ceramsites of riverway sludge and a production method for the same. The light-weight ceramsites of riverway sludge disclosed by the invention are obtained by using riverway sludge as a main raw material, and then performing impurity removal and homogenization, drying and ageing, granulation, roasting and screening to prepare a finished product. The light-weight ceramsites of riverway sludge prepared by 100% of urban riverway sludge have a bulk density of 300-500 kg/m<3>, wherein a part of the riverway sludge can be replaced by other kinds of clay raw materials such as lake sludge and marsh sludge. The various performance indexes of the ceramsites industrially produced from riverway sludge achieve the requirements of the national standard GB2839-81 of clay ceramsites. In the light-weight ceramsites of riverway sludge and the production method for the same disclosed by the invention, riverway sludge is used for replacing clay to realize development and utilization for waste, and to protect farmland, so that great social benefits, economic benefits and environmental benefits are obtained.

The invention discloses a high-concentration sewage treatment method. The method includes the steps: firstly, using an electrochemical oxidation method for pretreatment of sewage to obtain pretreated sewage; and secondly, adjusting the pH (potential of hydrogen) value of the pretreated sewage to range from 7.0 to 9.0, inoculating microalgae into the sewage, and subjecting the sewage to microalgaebiological treatment so as to purify the sewage, wherein the microalgae biological treatment operating conditions include: the temperature ranges from 25 DEG C to 30 DEG C, the light dark period is 12:12, the illumination intensity ranges from 40001ux to 60001ux, and the steps include aerating or mechanically stirring and continuously culturing for ten to twenty days. By the high-concentration sewage treatment method, sewage treatment cost is reduced, pollutant removal efficiency is improved. Further, the high-concentration sewage treatment method is wide in sewage treatment range, free of secondary pollution and flexible and controllable in operation mode, and environment-enhancing energy is realized.

The invention provides a method for detecting a biochemical oxygen demand. The method comprises the following steps of performing microculture on a microbe containing water sample from active sludge, surface water, domestic sewage or microbe containing industrial waste water, thus obtaining a microbial film; enabling a blank water sample and a target water sample to pass through the microbial film respectively, detecting and obtaining dissolved oxygen reduction current of the blank water sample and the target water sample, thus obtaining a dissolved oxygen reduction current difference value between the target water sample and the blank water sample; and obtaining the biochemical oxygen demand of the target water sample according to the dissolved oxygen reduction current difference value and a preset standard curve. According to the method, since the microbial film obtained by culturing the microbe containing water sample from active sludge, surface water, domestic sewage or microbe containing industrial waste water has high environment adaptation capacity, a buffer solution system is not required and the physiological activity can be maintained by taking one or more then one of running water, well water, dropping water and underground water as a medium.

Process of reducing organic content of brine which includes subjecting a brine solution containing an organic content to an electrochemical process for a sufficient period of time and at a sufficient voltage to reduce the organic content of the brine to obtain a reduced organic content brine. Also provided is a process for reducing organic contamination of brine in a chemical process comprising subjecting a brine stream of the chemical process to electrochemical oxidation to obtain a reduced organic content brine stream.

The invention discloses a moderate saline-alkali soil improvement conditioner as well as a preparation method and application thereof. The soil improvement conditioner comprises the following components in parts by weight: 55-60 parts of calcium salt, 18-23 parts of biomass coke, 10-15 parts of a biomass aqueous solution and 10-12 parts of an organic fertilizer. The soil improvement conditioner disclosed by the invention can quickly and effectively solves the problems of high soil alkalization degree, low fertility, larger soil pH value, clumpy soil and the like and is low in cost and low in heavy metal content.

The invention relates to a powdered activated carbon reflux/ultrafiltration combined technology for a water treatment plant. The technology is characterized in that powdered activated carbon are fed into an ultrafiltration membrane tank, and the powdered activated carbon which are kept in the ultrafiltration membrane tank for a proper time are refluxed to a pre-treatment coagulation period at a proper reflux ratio through utilizing a reflux pump, wherein the addition amount of the powdered activated carbon is 5-20mg/L, the reflux ratio is 1%-5% of a system flow, and the retention time of the powdered activated carbon is 2-24 hours. The organic pollutant content of raw water is reduced through fully utilizing the adsorptive capability of the powdered activated carbon in a mixed liquid of the technology, powdered activated carbon particles serve as flocculation cores so as to enhance coagulation, and a treatment effect of a coagulation period is improved; and moreover, the operation stability of a system is improved, and the water production rate is increased. The technology can be widely applied to an ultrafiltration combined technology for the water treatment plant.

The invention discloses a method for processing hyper-saline organic wastewater. The method comprises the steps of gas stripping, resin absorption and active carbon absorption. The step of gas stripping comprises the steps of feeding wastewater into a polycarbonate producing process into a gas stripping tower, feeding a heating medium into the gas stripping tower to heat the wastewater, vaporizing a dichloromethane in the wastewater to condense and enter a solvent recycling system; the resin absorption step adopts macroporous resin; the active carbon absorption step adopts particle active carbon with a granularity of 10-24 meshes; before the resin absorption step, inorganic acid is added for adjusting pH value of the organic wastewater at 1-6; before the active carbon absorption step, alkaline liquid is added for adjusting pH value of the hyper-saline organic wastewater at 5-9. The method has the characteristics that operation is convenient and reliable and investment cost is low.

The invention discloses antibacterial water-based ink and a preparation method thereof. The antibacterial water-based ink comprises components in parts by weight as follows: 20-60 parts of an acrylic resin liquid, 10-30 parts of organic pigments, 10-20 parts of deionized water, 15-20 parts of ethyl alcohol, 0-10 parts of an antibacterial agent and 0-2 parts of filler and an auxiliary, wherein the antibacterial agent is one or more of nano-copper oxide, nano-cuprous oxide, nano-copper, nano-silver or nano-gold containing functional surface groups. The antibacterial agent is modified and is enabled to contain the functional surface groups, so that hydrophilicity of the antibacterial water-based ink is improved, and the stability of the antibacterial water-based ink is improved; besides, the antibacterial agent contains the functional surface groups, and accordingly, the antibacterial water-based ink has excellent oxidation resistance and antibacterial performance, and the content of heavy metal is low.