1375results about "Sludge processing" patented technology

The invention discloses a method for managing town black and olid river pollution in situ by utilizing biological repair technology, which takes the steps and measures of aerating and oxygenizing in riverway, adding a complex microbial agent, biologically repairing bottom sediment, arranging a bio-nest system and the like, so as to control and eliminate the exogenous and endogenous pollution of the river, purify the water quality of the river, improve the self-purification ability of the water body and achieve the purpose of eliminating black and olid. The method does not need to build structures in the riverway or lead the river water out of the riverway to be treated, or dredge the bottom sediment in the river, therefore the method is generally applicable to incomplete sewage interception and dredging or the rivers which can not be intercepted sewage or dredged temporarily, and the in situ treatment to the riverway which is affected by tide and has complicated fluid variation. Therefore, the method which can lead the water body to recover normal ecological function provides the practical, economic and convenient treatment method for various town black and olid rivers.

The invention relates to a sludge treatment process based on a hydrothermal modification technology. The sludge treatment process is carried out by comprising the following steps of: (1) temporarily storing the sludge which is subjected to mechanical dehydration and has the water content of 70-85% to a pretreatment unit and deodorizing the sludge; (2) introducing to a homogeneous device, fully mixing and homogenizing, introducing the homogenized sludge to a slurrying device, introducing the slurried sludge to a hydrothermal reactor for hydrothermal reaction, and introducing the hydrothermal sludge to a flash evaporator for decompression and flash evaporation; (3) cooling to 35-45 DEG C by using a cooler, then introducing to a high-pressure diaphragm pressure filter for pressure filtering and dehydration to obtain a dehydrated mud cake with the solid content of 35-45% and dehydrated filtrate; (4) introducing the dehydrated filtrate to an intermediate temperature anaerobic reactor, wherein the residence time is for 5.5-7.5d, the inlet water temperature is controlled below 40 DEG C, and the anaerobic reaction temperature is 30-40 DEG C; and (5) preparing a biomass fuel rod by using the dehydrated mud cake, and introducing the biomass fuel rod to a boiler to provide steam for the hydrothermal reactor and the flash evaporator. The sludge treatment process has the advantages of goodtreatment effect, obvious volume reduction effect, high harmless degree, recycling of methane, good economic benefit and the like.

A process and an apparatus for the manufacture of biogas and a solids fraction from an organic waste feedstock is provided. The process involves thermal hydrolysis of the organic waste feedstock at a temperature from about 100 to about 220° C., a pressure from about 5 to about 20 bars, for a period of time from about 15 minutes to 4 hours, to produce a hydrolysate. The hydrolysate undergoes anaerobic digestion at a temperature from about 25 to 60° C., for a period of time from about 1 to 35 days to produce a biogas stream and a digestate. The digestate is separated into a solids fraction and a liquid fraction, and a portion of the solids fraction is recycled for further anaerobic digestion. The biogas stream, characterized as having a methane content from between 55 to 80% by volume, and the solids fraction, are recovered. The apparatus includes a receiving bin for receiving and supplying organic waste feedstock to a thermal hydrolysis reactor. The thermal hydrolysis reactor for processing the organic waste feedstock at a temperature from about 100 to about 220° C., a pressure from about 5 to about 20 bars, for a period of time from about 15 minutes to 4 hours to produce a hydrolysate. An anaerobic digester for processing the hydrolysate at a temperature from about 25 to 60° C., for a period of time from about 1 to 35 days to produce the biogas and a digestate, and a solids thickening tank for separating the digestate into the solid fraction, a liquid fraction and a secondary biogas fraction.

The invention relates to a centralized kitchen waste treatment method which comprises the following steps of: (A) sorting kitchen waste; (B) separating oil from water; (C) treating oil; (D) treating sewage; and (E) treating odor. Compared with a traditional kitchen waste burying method, by using the centralized kitchen waste treatment method, a great amount of soil is saved and an available methane resource is generated, kitchen waste reaches 100 percent of harmlessness, more than 95 percent of resource utilization and more than 95 percent of quantitative reduction, and the harmless treatmentof waste and the recycle of resources are truly realized.

The invention relates to sulfur oxide sulfur bacilli and biological eliminating method of chromium in tanning mud. Bacterial strain is named as TS6, preserve mark is CGMCCNO.0759. The method of eliminate chromium in tanning mud by above mentioned sulfur oxide sulfur bacilli is adding 1-3 g/L sulfur into tanning mud in biology reactor, inocualting 10-15% (v/v, the same below) TS6 bacteria strain, stirring, ventilating and subsiding; that 10-20% of subsiding mud backflow to reactor; dehydrating suprplus subsiding mud; adding basic material into liquid part to turn Cr3+ into Cr(OH)3 and subside, sediment is dissolved by sulfuric acid, then there is the tannage stage; solid part is neutralized to agriculture. The elimianting rate of Cr in mud is 95%-100%, reserving rate of nutrient in mud is above 80%.

A process for removal and recovery of nutrients and recycling of water from digested manure or other organic wastes. A first step involves separating waste from an anaerobic digester into digested liquids, digested solids, and biogas. A second step involves precipitating solids from the digested liquids. A third step involves stripping ammonia from the digested liquids. A fourth step involves injecting an exhaust stream of carbon dioxide drawn from the co-generator into the digested liquids to reduce the pH and raise the temperature of the digested liquid. A fifth step involves recycling the digested liquids back to the anaerobic digester for use in diluting in coming solid wastes. A sixth step involves passing the excess ammonia stripped from the digested liquid through the digested solids to recover nitrogen through aborption with the resultant digested solids being usable as a biofertilizer with a high nitrogen content. A seventh step involves capturing the biogas for use in a co-generation system.

The present invention provides methods for the generation of methane by a two phase anaerobic phase system (APS) digestion of organic substrates. Also provided is a device for practicing the methods of the invention. The APS-digester system is a space-efficient, high-rate solids digestion system. The APS-digester system consists of one or more hydrolysis reactors, a buffer tank and one biogasification reactor.

The present invention relates to environment protecting technology, and is especially one kind of sludge drying treatment process. The present invention is one low-cost combined sludge drying and utilizing process integrating microwave technology, aerobic fermentation technology and heat pump drying technology. The present invention is suitable for treatment of different kinds of sludge, and the sludge product has wide applications, including use as organic fertilizer, use as the material for composite organic fertilizer and building material, use as fuel for incinerating garbage and heating boiler, etc.

The invention provides a river surge silt d harmless and recycling treatment method. In the method, a dredger is utilized to suck silt, the silt is sent into a biochemical treatment pond from the ship through a silt transmission pipeline, compound enzyme is utilized to carry out bioremediation, gravels and sands with the particle size bigger than 1mm are filtered out by a primary hydrocyclone and a vibration screen, sands with the particle size of 0.075-1mm are filtered out by a secondary hydrocyclone and the vibration screen, powdery particles with the particle size of 0.025-0.075mm are filtered out by a third-level hydrocyclone and the vibration screen, powder particles are further separated out from outlet silt tail water through a sediment tower, sewage from the sediment tower is filtered by utilizing a fiber filter after flocculant is added into the sewage, and powdery particles are deposited from backflushing silt after being filtered by utilizing the sediment tower again, and the powdery particles are dehydrated by the third-level hydrocyclone and the vibration screen after entering a sludge pool and are cured by a curing agent after dehydration. The method has high resource utilization ratio, meets the requirements for the environmental protection, particularly carries out stage treatment on the silt, lowers the cost and enhances the efficiency.

The biphase anaerobic fermentation process of kitchen refuse to produce hydrogen and methane includes the following steps: 1. sorting kitchen refuse and mixing with water in certain amount; 2. mixing with sludge from sewage treating yard and heat treatment; 3. heat exchange between heat treated mixture and mixture without through heat treatment; 4. anaerobic fermentation of the heat treated mixture in the first phase to produce hydrogen; 5. anaerobic fermentation of the residue from the first phase fermentation in the second phase to produce methane; and 6. using the residue from the second phase fermentation as fertilizer or returning to replace sludge serving as hydrogen producing bacteria source. The process is simple, can recover the biomass energy from kitchen refuse effectively, and has no secondary pollution.

The invention discloses an ecological restoration and purification method for landscape water environment which is characterized by comprising the following steps of (1) performing bottom mud sterilization and activation treatment; (2) splashing a microbial flora compound preparation; (3) reconstructing a submerged communities; (4) repairing an aquatic ecosystem food chain; and (5) performing aquatic ecosystem conservation management. According to the ecological restoration and purification method for the landscape water environment, a biological integrated control technology is applied, and the water purification effect is achieved by use of submerged plants; furthermore, decomposers, namely microorganisms in an ecosystem are fully utilized, and multiple types of aquatic animals are put in the aquatic ecosystem, so that the ecosystem food chain is perfected, various aquatic species promote and restrict one another, the whole riverway, lake, pond and wetland system is kept in dynamic balance for a long time, the original self-purification capability of the aquatic ecosystem is restored, and a long-term stable effect is achieved.

The present invention belongs to the field of waste water treating technology, and is especially repeated aerobic-anaerobic microbe coupling process of treating waste water in environment protection. Biological fluidizing beds and biological fixed beds are connected serially with overflow partition boards and added with two different kinds of porous biological carriers. Via repeated aerobic-anaerobic microbe coupling in different layers, the present invention disposes organic matter and nitrogen compound in waste water while in-situ decomposing sludge. The present invention realizes the effective elimination of organic matter and nitrogen in waste water, the forced separation of the solid particles from water in the fixed beds and the digestion, degradation and final complete decomposition of solid matter. The present invention has high efficiency, low power consumption and low running cost.

A modular process for organosolv fractionation of lignocellulosic feedstocks into component parts and further processing of said component parts into at least fuel-grade ethanol and four classes of lignin derivatives. The modular process comprises a first processing module configured for physico-chemically digesting lignocellulosic feedstocks with an organic solvent thereby producing a cellulosic solids fraction and a liquid fraction, a second processing module configured for producing at least a fuel-grade ethanol and a first class of novel lignin derivatives from the cellulosic solids fraction, a third processing module configured for separating a second class and a third class of lignin derivatives from the liquid fraction and further processing the liquid fraction to produce a distillate and a stillage, a fourth processing module configured for separating a fourth class of lignin derivatives from the stillage and further processing the stillage to produce a sugar syrup.

The present invention provides an anaerobic digestion process for the treatment of organic waste materials, which process comprises a bacterial process that is carried out in the absence of oxygen and wherein said process comprises digestion, in which said waste is fermented in tanks at an elevated temperature, and wherein said process results in the production of biogas, which can be used in generators for electricity production and/or in boilers for heating purposes, the comprises treating an organic waste with a composition comprising a fermentation supernatant containing active enzymes from a Saccharomyces cerevisiae culture; and a non-ionic surfactant, wherein said nonionic surfactant may be selected from the group consisting of ethoxylated nonylphenol and ethoxylated octyl phenol.

This invention relates to a preparation method for microbial colony used for effectively treating urban living sewage and sewage sludge in river bend, lake, marsh enclosed or semi-enclosed water areas. The said method includes the following steps: collecting and culturing of engineering initial bacterial strain, enrich mixed culture of bacterial strain, acclimatized culture of engineering bacteria and expanding culture of acelimatized bacteria. It this invention found is from the microbial growth and metabolic mechanism a preparation method of microbial colony which can high-effectively and high-adaptively treat various sewage sludges.

The invention relates to a biological leaching, solvent extraction and electrowinning recovery method for heavy metal copper in sludge, and is a method of dissolving the copper from the sludge by biological leaching method, separating and enriching the copper in leaching solution by solvent extraction method, and recovering the metal coppe by electrowinning electroless plating copper technology, and is a harmless and resourceful treatment technology for municipal sludge and industrial sludge with higher copper content. Firstly, the biological acidization which lowers the ph value of a sludge system and oxygenizement of compound acidophilic thiobacillus under aerobic condition in the presence of energy matter are utilized to enable the heavy metal copper in the sludge to abundantly dissolved out from solid phase to liquid phase, so that the sludge can be harmless; secondly, the copper in the biological leaching solution is extracted by using a copper extractant M5640 so that the copper enters an organic phase, and then the copper is conducted back extractioin by using sulfuric acid so that the copper enters the water phase again so as to separate and enrich the copper; finally, the enriched copper solution is electrolyzed to causes the copper to be deposited, and the copper is recovered to be resourceful. The technique not only can remove the heavy metals in the sludge and kill pathogens, but also ensures that the treated sludge is easy to dehydrate and settle and the heavy metal copper dissolved out can be recovered to achieve the purposes of harmlessness, reduction and resource of the sludge.

The invention discloses a cooperative treating method of kitchen waste and sludge of a sewage plant. The method comprises the following steps that A, a kitchen waste source is pretreated; B, the sludge is subjected to high-temperature hydrolysis cooperating with anaerobic digestion; C, biogas residues are dehydrated and pressed; and D, drying treatment is conducted to obtain finished products. The cooperative treating method has the advantages that after the comprehensive treating processes that the kitchen waste source is pretreated, the sludge is subjected to high-temperature hydrolysis cooperating with anaerobic digestion, the biogas residues are dehydrated through a dehydrator and pressed directly through a high-pressure filter press and subjected to solar drying, stabilization, harmlessness and reduction of the sludge can be achieved, and meanwhile waste is changed into treasures, specifically, available biogas and garden greening soil and forest land are produced.

An ambient anaerobic digester system for anaerobic digestion of animal waste with biogas production and recovery is provided. The anaerobic digester system includes a substantially flexible bladder for anaerobically digesting the animal waste with biogas production and transmitting the biogas to at least one biogas storage container, biogas use device or a combination thereof. In a preferred form, the substantially flexible bladder has a waste inlet, a digester effluent outlet, one or more sludge access ports and a biogas outlet in a top surface thereof.

The anaerobic digester system may inexpensively, simply, reliably, and effectively be used to treat animal waste without energy expenditure and little capital expense, thus minimizing pollution typically caused by animal waste.

Methods for steady state operation of an upflow anaerobic digester using organic matter that contains a portion of solid, non-digestible matter include (1) providing an upflow anaerobic digester, (2) providing a bacterial culture in the upflow anaerobic digester for the breakdown of organic matter, (3) introducing an influent into the upflow anaerobic digester, wherein the influent comprises a biodegradable component, a liquid component, and an amount of solid non-digestible matter, (4) operating the upflow anaerobic digester in a steady-state, (5) accumulating the solid, non-digestible matter in the upflow anaerobic digester, (6) and removing a portion of the accumulated solid, non-digestible matter from the upflow anaerobic digester through the bottom of the upflow anaerobic digester while maintaining steady-state operation of the upflow anaerobic digester. Steady-state operation of the upflow anaerobic digester is maintained by selecting a percentage of the total volume of the liquid and material that are flushed from the digester for a given period of time so as to preserve the steady-state of the bacterial culture.

The invention discloses a method for comprehensive treatment of a town river way. The method comprises exogenous pollution control: sewage draining outlet pretreatment and branch surge pretreatment; endogenous pollution removal: bottom mud pollutant treatment and biological purification of polluted water; in-situ remediation of a river channel ecological system: ecological restoration of aquatic plants and restoration of aquatic animals; and supplemented feeding of an efficient microbial agent and ecological restoration monitoring of the river channel. A staged treatment principle is adopted for the method for comprehensive treatment of the town river way, conditions are created positively to gradually reduce river channel pollution; through the exogenous pollution control, the endogenous pollution removal, the in-situ remediation of the river channel ecological system, later period maintenance and ecological regulation and the like, a water system is made smooth, the river channel is made clean, the ecological system is established artificially, the self-cleaning capacity of the river channel is restored gradually, healthy water circulation of the river channel is achieved, biodiversity is promoted, and virtuous circle of the town and country environment and the ecological system is promoted.