3422 results about "Sewage sludge treatment" patented technology

The invention discloses a catalyst for oxidation and decomposition of organic pollutants in water with ozone and a method thereof for catalyzing sewage treatment with ozone, and relates to a catalyst for decomposing the organic pollutants in water and the method thereof for sewage treatment. By adopting the catalyst, the problems that the traditional solid catalyst for catalyzing the decomposition of organic pollutants in the water with ozone is easy to be oxidized and decomposed by ozone, easy to break, can dissolve out impurities, has low strength and low catalytic efficiency and is difficult to recover can be solved. The catalyst for oxidation and decomposition of the organic pollutants in the water with ozone refers to spinel ferrite or a composite of spinel ferrite; and the method of the catalyst for catalyzing the sewage treatment with ozone comprises the following steps of: adjusting pH and temperature of sewage, then introducing ozone, further adding the catalyst and treating for 1 minute-120 minutes, then using a magnetic field to recover the catalyst, and finally absorbing tail gas of the ozone. The catalyst can improve the removal rate of organic matters to 90%-100%, and can be used for sewage treatment or deep treatment of drinking water.

The invention discloses a textile dyeing wastewater advanced treatment recycling technology. The technology comprises the following steps: filtering to remove textile fibers; cooling; neutralizing, degrading organic matters and decomposing, replacing or degrading (cracking) the chormophoric groups of the organic matters to reduce the chroma of the wastewater; performing biochemical treatment with the biomembrane; precipitating to ensure that the precipitated sludge enters a sludge treatment system and the supernatant enters a flocculation pool; performing chemical treatment, namely adding a medicament in the flocculation pool to remove the suspended matter (SS), CODcr (chemical oxygen demand), BOD (biochemical oxygen demand) and chroma of the water; performing secondary precipitation to ensure that the free SS is precipitated and the wastewater is decolored further; separating to remove and degrade the chloride ions of the reuse water; performing secondary biochemical treatment to further reduce the concentrations of the SS, CODcr and BOD in wastewater; performing ozone oxidation treatment, decoloring, degrading organic matters; performing chemical treatment to remove insoluble dye materials and SS and reduce the COD and chroma; and performing secondary filtration, and forming an ozone/activated carbon system to ensure that the hydroxyl radicals of activated carbon are used and the organic reaction in wastewater is adopted to decolor and degrade organic matters. The invention overcomes the defects of the existing physical method, chemical method and chemical method treatment technologies; and the technology has been used in many enterprises, and the good treatment effects are obtained.

A harmless recycling treatment process for urban sludge carries out urban sludge treatment through the prior pulverized coal boiler and coal conveying and tail exhaust treatment systems in a power plant. In the treatment process, flue gas extracted from the front part of an air preheater of a power plant pulverized coal boiler is mixed with flue gas extracted from the back part of a power plant boiler dust remover into flue gas with the temperature ranging between 140 and 180 DEG C; the flue gas is conveyed to a sludge drier to carry out sludge drying; and the dried sludge is fed into a power plant coal conveying system, mixed with coal, and then fed into a furnace to carry out incineration for power generation so as to realize the recycling utilization of the sludge. The coal and dry sludge are burnt in a boiler and discharged flue gas is fed into the power plant boiler dust remover and a wet desulphurization system for treatment; and the flue gas after the drying and tail gas generated by storing and conveying the dry sludge are discharged into a power plant desulphurization system for treatment, so that the standard discharge of pollutants is realized and secondary environmental pollution is eliminated. The harmless recycling treatment process makes effective use of the prior power plant boiler and coal conveying, burning, dust removal and desulphurization facilities, and has the advantages of simple equipment, less investment, short construction cycle and low operating cost.

Sewage sludge shale ceramsite and a preparation method thereof are provided, which relates to the light energy-saving ceramsite of building materials and a preparation method thereof. The ceramsite of the invention consists of sewage sludge, shale and admixtures; the method of the invention uses the sewage sludge, the shale and the admixtures as raw materials; first, the shale is grinded into shale powder and then the sewage sludge, the shale and the admixtures are mixed and wedged to be granulated into round particles and then enter into a kiln; the products are obtained after going through drying, preheating, barking and being taken out of the kiln for cooling. The ceramsite employs the sewage sludge discharged directly from sewage treatment plants and the shale as major materials, which greatly saves land resource and partial shale mine resource and provides an extremely good way for the non-hazardous and reclaiming treatment of sewage sludge; the method of the invention is simple, energy-saving and resources-saving and the density rank of the ceramsite is 300-700. The ceramsite of the invention can be widely applied in lightweight aggregate bricks, lightweight aggregate sheet materials, lightweight aggregate concrete, etc. and can also be taken as the filter material of sewage treatment, the water-retaining agent in cultivation, etc.

The invention discloses an urban sewage treatment system and purification method and belongs to the technical field of sewage treatment. The sewage treatment and purification method comprises the steps of collection, physical precipitation, chemical precipitation, anaerobic biological treatment, anoxic biological treatment, aerobic biological treatment, adsorption, disinfection, ultrafiltration membrane filtration and sludge treatment in sequence. According to the method, a physical precipitation method, a chemical precipitation method and a biological purification method are used comprehensively to perform step-by-step classification treatment on different pollutants, the purification efficiency is high, the effluent quality is good, the nitrogen and phosphorus treatment capacity is higher, operation and maintenance are convenient, management is simple, and popularization and use can be realized.

The invention belongs to the technical field of solid waste treatment, in particular relates to a combined pre-treatment method for improving sludge disintegration effect and strengthening subsequent anaerobic digestion, comprising the following concrete steps of: gravity settling and thickening residual sludge generated in a secondary settling tank of a municipal sewage treatment plant, sending the thickened sludge into an ultrasonic reactor for ultrasonic irradiation and adding NaOH; sending the sludge into a sludge anaerobic digestion reactor for subsequent medium temperature anaerobic digestion after the combined action of ultrasonic and NaOH; and collecting methane generated by digestion and measuring the yield of the methane with a gas collection device. The method firstly uses ultrasonic and NaOH jointly for sludge treatment, the soluble COD concentration in sludge liquid phase after treatment is improved by about 52 times, the methane yield is improved by 40.6 percent, and the problem of limited application of ultrasonic due to high energy consumption is largely overcome; and the method is applicable to the treatment of residual sludge in sewage treatment plants, and can be achieved by making corresponding modification on the current treatment facilities of sewage treatment plants for different-scale sewage treatment plants, thus having wide application prospect.

A sewage treatment system for a breeding system able to guide sewage out of the breeding system to be purified and fed back to breeding ponds for reusing, it can be applied for one breeding pond or applied simultaneously for multiple breeding ponds, and it comprises: a purifying tank, at least a dirt discharging tube to lead sewage in the breeding ponds into a purifying tank; and at least a water take-in tube for feeding purified sewage from the purifying tank back to the breeding ponds. Wherein each dirt discharging tube has a dirt collecting portion; by multiple deposition and purification treatments on the sewage in the breeding ponds with the dirt discharging tubes and the purifying tank, the quality of water in the breeding system can be elevated, and environment pollution during breeding can be effectively reduced.

A sewage treatment control device, a method and a sewage treatment system, are disclosed. In one example, the sewage treatment control device includes measuring units having sensors for inspecting specific components in water, respectively; validity verification units connected to the measuring units to determine validities for measured component values, respectively; target value setting units connected to the validity verification units to set target values for the component values measured in the measuring units, respectively; a manual setting unit for setting a target value depending on a component value inputted by an operator; a signal selection unit for allowing either one of the respective target value setting units or the manual setting unit to be connected; a proportional-integral-derivative control unit for performing proportional, integral or derivative action for the target value inputted from the signal selection unit to convert the target value into a control signal; and a manipulation unit for manipulating a sewage treatment apparatus depending on the control signal converted in the proportional-integral-derivative control unit.

The invention discloses a sewage treatment system, which comprises an anaerobic trough, a sand leach trough and a communicating pipeline, wherein a water inlet and a drain outlet are arranged on the anaerobic trough, the inside of the anaerobic trough comprises a padding and special compound probiotics which are fixed and reserved on the padding, the sand leach trough is connected with the anaerobic trough through the communicating pipeline and used for filtering sewage passing through the anaerobic trough again; and the sand leach trough further comprises a water outlet, a drain outlet and a backwashing drain outlet, wherein the water outlet discharges the sewage filtered through the anaerobic trough and the sand leach trough, and the filtered sewage is same with clear water in vision and smell, and can be repeatedly recycled.

The invention relates to a high-efficiency and low-consumption recycling and treating method for urban sewage, belonging to the technical field of treating and reusing the urban sewage, which aims to solve the problem of poor effects of dephosphorization and denitrogenation in prior art. The recycling and treating method in the invention is characterized in that: first, biological phosphorus removal is conducted for the pretreated sewage, meanwhile, the organic substance is also removed; then, the biological autotrophic denitrogenation is carried out, thus completing the recycle and treatment of the sewage. The biological autotrophic denitrogenation can be implemented in six ways: first, the sewage with the phosphorus removed biologically enters a nitrous acid biofilter, and then enters an ANAMMOX activated sludge reactor; second, the sewage enters a nitrous acid activated sludge reactor and subsequently enters an ANAMMOX biofilter; third, the sewage enters the nitrous acid biofilter, and then enters the ANAMMOX biofilter; fourth, the sewage enters the nitrous acid activated sludge reactor before entering the ANAMMOX activated sludge reactor; fifth, the sewage enters a single-segment biofilter reactor; and sixth, the sewage enters a single segment activated sludge reactor. The recycling and treating method for urban sewage in the invention has the advantages of good effect of sewage treatment, and low treatment costs.

The invention discloses a demulsifying and flocculating treatment method of machining cutting fluid sewage water, comprising the following steps: conveying cutting fluid sewage water in an acidification pool and adding diluted sulfuric acid for acidification; adjusting the pH to be 3.5-5.5; then conveying in a demulsifying device and adding ferrous sulfate solution for demulsification and precipitation; then conveying in a neutralization pond and adding NaOH solution for neutralization; conveying in a coagulating basin after neutralization and adding a coagulating agent for coagulation; then adding polyacrylamide to a flocculation tank; flowing down by a sieve body through the square rectifying plate of the flocculation tank after flocculating; depositing through the sloped tube stuffing body of a flocculation precipitation pool; discharging out supernatant fluid from a water collection weir; and removing precipitated sludge floccule. The method has the characteristics of integrating oil removal, demulsifying and flocculating, and being thorough for pollution control, good in application effect and economic and efficient; the effluent COD (Chemical Oxygen Demand) of cutting fluid sewage water treated through the method can be decreased to below 500mg/L; and the method can be widely applied to sewage water treatment in machining industry.

The invention relates to a combined treatment technology for oil-containing sludge, which is particularly suitable for oil-containing sludge which is generated in sewage treatment processes of petrochemical plants. The method comprises: adding a texturizer into the oil-containing sludge for texturizing treatment, adding an oil displacement agent for uniformly mixing, mechanically dehydrating the oil-containing sludge to reduce a water content to 50-90%, then sending the oil-containing sludge into squeezing equipment for squeezing, mixing mud cakes after squeezing with a mixed extractant, uniformly stirring for extraction, sending a mixture into a solid-liquid separator after extraction, introducing a separated liquid into a rectifying tower for regenerating the extractant, and mixing separated solid residue after dried with coal to used as a fuel. The treatment technology of the invention has advantages of low energy consumption for oil-containing sludge treatment, and fast extraction speed, can recover oil in the oil-containing sludge, and can implement resource utilization and harmlessness treatment of the oil-containing sludge.

The invention relates to a sewage treatment system comprising: a pre-anoxic tank which is connected to a sewage inlet pipeline and is used for an anoxic denitrification reaction of returned sludge and the sewage; an anaerobic tank which is connected to the sewage inlet pipeline and communicated with the pre-anoxic tank and is used for anaerobic phosphorus releasing during biochemical dephosphorization; an anoxic tank which is connected to the sewage inlet pipeline and communicated with the anaerobic tank and is used for nitrogen removal by denitrification; an aerobic tank which is communicated with the anoxic tank and is used for degrading organic substances, nitrating organic nitrogen and ammonic nitrogen and absorbing phosphorus; a post-anoxia tank which is communicated with the aerobic tank and is used for performing nitration and denitrification at the same time; and a sequencing batch sloping plate sedimentation tank which is communicated with the post-anoxia tank and is used for separating muddy water and concentrating the returned sludge, herein the returned sludge is flown back to the pre-anoxic tank. The sewage treatment system is excellent in comprehensiveness and flexibility and can flexibly fit various water quality and treatment requirements generally.

A solar-powered device for converting sludge into one or more products is disclosed. The device includes a pyrolysis reactor selectively operable by solar energy, for carrying our thermal decomposition, into one or more products, of sludge introduced into the reactor via a dedicated sludge inlet. The reactor includes at least one outlet for discharging from the reactor one or more products obtained from the sludge decomposition. The device also includes a sensor for sensing sunlight radiation and providing an output data indicative of the amount of solar energy corresponding to the sensed sunlight, and a control unit for receiving the output data and operating or shutting down the pyrolysis reactor based on the amount of solar energy generated from the sunlight.

The invention discloses a sewage treatment technique and in particular relates to a sewage treatment system used for treating domestic sewage. The system comprises at least one sewage input pipeline, an aeration tank, a water collection tank, at least one slope cant, at least one sewage output pipeline and at least one filtration unit, wherein the aeration tank is connected with a drainage pipeline; the drainage pipeline is arranged at the top of the slope cant; the water collection tank is formed in the bottom of the slope cant; the at least one sewage output pipeline is connected with the bottom of the water collection tank; the at least one filtration unit is arranged between the slope cant and the water collection tank or is arranged in the water collection tank. By virtue of the sewage treatment system, flow impellers are greatly reduced; even the flow impeller can be omitted, therefore, the building and maintenance costs of a sewage treatment tank can be reduced.

The invention relates to a heavy metal stabilizer used for sludge treatment. The stabilizer comprises, by weight, 30-90 parts of inorganic powder, 0.1-20 parts of sulfide, 0.1-20 parts of organic chelate, 0.1-20 parts of an amide chemical substance, and 0.1-20 parts of an organic flocculating agent. The stabilizer is used for treating sludge, especially low-content sludge or sludge containing a plurality of heavy metals, the content of heavy metals in a leachate of heavy metals in the sludge immobilized and stabilized by the heavy metal stabilizer is far lower than Chinese standards, the stabilized sludge can be locally embedded or applied to roadbeds, greening, soil covering, ecologic restoration and the like, and the stablizer can effectively solve the problem of difficult treatment of the heavy metal sludge, causes no secondary pollution to the environment, can realize an efficient, reasonable, environmentally-friendly and economic treatment technology, and can be widely applied to sludge treatment. The stabilizer has the characteristics of cheap and easily available raw materials, simple technology and apparatus, small investment, easy operation and the like, and has a high economic benefit. The invention also provides a method for treating sludge by adopting the heavy metal stabilizer.

The invention provides a biological filler bag for sewage treatment and application thereof. The biological filler bag is made by the following steps: filling a filler substrate in a fiber cloth bag made of fiber cloth, and sealing. The main raw material of the fiber cloth is a polyester fiber, a polypropylene fiber or a mixture thereof; and the diameter of the polyester fiber or polypropylene fiber is 2-8 dtex, and the length is 30-86mm. The biological filler bag provided by the invention has abundant pore sizes and large specific area, and thus, can provide a habitat for aquatic organisms and promote mass proliferation of microbes; and the biological filler bag can be used for growing aquatic plants, and is beneficial to the growth of aquatic animals. The biological filler bag also has the function of filtering impurities in a water body. The biological filler bag is applicable to sewage treatment, and has the characteristics of favorable film forming property, multiple biologic species and favorable pollutant removal effect (especially for N and P in a water body).

The invention relates to a sewage treatment and regeneration cyclic utilization device, which is provided with a biochemical system, an electrolysis system, a membrane biological reactor (MBR) system and a deep processing system. A sewage treatment and regeneration cyclic utilization method comprises the following steps of (1) biochemical treatment; (2) electrolysis; (3) MBR system filtering; (4) capacitance desalting and sterilization; and (5) sludge treatment. The device and the method can overcome the defects that in the existing sewage regeneration technology, the quality of the regeneration water is poor, the water consumption water quality requirements are difficult to meet, the investment is high, the operation cost is high, the secondary pollution is caused on the environment, and the like. The sewage discharge can be reduced, the utilization efficiency of the water is improved, meanwhile, the regeneration and the reutilization on the sludge are realized, and the harm possibly caused by the sludge to the environment is eliminated.