36results about How to "Reduce post-processing load" patented technology

A tannery wastewater pretreatment method comprises the following steps: (1), precipitating sulfur-containing wastewater, discharging supernatant after precipitation and dewatering sludge after precipitation; (2), carrying out chromium removal treatment on chromium-containing wastewater through an alkali precipitation method and discharging supernatant after precipitation; (3), carrying out precipitation treatment on other wastewater, discharging supernatant after precipitation and mixing sludge with comprehensive wastewater sludge generated in the step (4); (4), enabling effluents discharged in the step (1), (2) and (3) to enter an adjusting tank to be mixed into comprehensive wastewater, lifting the mixed wastewater to a coagulating precipitation tank after adjusting, and carrying out biochemical treatment on supernatant after precipitation. According to the invention, the SS pollution load in the pre-treated comprehensive wastewater is reduced by 95% or above, the COD pollution load in the pre-treated comprehensive wastewater is reduced by 70% or above, the total nitrogen load in the pre-treated comprehensive wastewater is reduced by 30% or above, the content of toxic and harmful substances such as sulfide and total chromium is effectively controlled, and the requirement for stable operation of subsequent biological treatment is met. The treatment effect is stable and the stable operation of a biological system is facilitated.

The invention provides a process for preparing l-pectinose and xylose byproduct with pea pods as a raw material. The process for preparing the l-pectinose and xylose byproduct with the pea pods as the raw material comprises the steps of carrying out pretreatment on the raw material, carrying out low acid hydrolysis for extracting l-pectinose and carrying out high acid hydrolysis for extracting xylose, The process for preparing the l-pectinose and xylose byproduct with the pea pods as the raw material has the advantages that low acid is utilized for hydrolyzing the pea pod raw material, high content l-pectinose hydrolysate can be obtained by adopting a one-step decoloration-ultrafitration-desalination-concentration process, and crystallization is directly carried out for obtaining the l-pectinose without carrying out chromatographic separation, so that the production technology is simplified, the operation is simple, and the production cost is reduced; hydrolysis slag with l-pectinose removed is added with acid again to be hydrolyzed, and xylose is produced at the same time, so that the pea pod raw material is fully utilized; in treatment on hydrolysate, a saccharic acid membrane separation process is adopted for replacing the traditional acid neutralization process, so that part of acid liquor is recycled, sewage discharge is greatly reduced, intake of saline ions is avoided, a follow-up processing load is lightened, and the production cost is reduced.

The invention discloses a complete-reclaiming process of down wastewater and a special feather fishing machine without driving force. A grit basin, a balance tank, a floatation tank, a biological contact oxidation tank, a secondary sedimentation tank, a clarifying basin, a no-value sand filter, a disinfection tank, a sludge thickening tank, a feather fishing machine without driving force specially used for reclaiming process, and the like are adopted to process wastewater. The complete-reclaiming process has low processing cost and good processing effect and realizes zero emission and down reclaiming.

The invention discloses a dry manure two-phase anaerobic digestion system for a pig farm belonging to the technical field of environment engineering and energy, which uses a hydrolytic acidification and methane production two-phase anaerobic digestion system as a main body. The system is characterized in that the dry manure in the pig farm is treated by integrating aeration biogas slurry reflux, external culture of acid producing bacteria and methane producing bacteria, and activity maintaining device so as to solve the problem that the prior two-phase process cannot effectively treat high solid concentration pig manure and has lower efficiency, thoroughly solve the problem of large water consumption of the conventional anaerobic treatment, realize biogas slurry concentration, reduce the discharge amount of the biogas slurry, greatly reduce subsequent treatment load of biogas engineering, and realize quick degradation and efficient gas production of organic waste. After application, the system improves the comprehensive economic benefit by 20 percent compared with the prior anaerobic system; and the improvement on efficiency ensures that the biogas engineering of the dry manure pig farm realizes self supply of energy, and maintains normal operation of the biogas engineering of the pig farm in winter, thereby achieving multiple aims of saving water, reducing discharge, protecting environment and producing energy and fertilizer.

The invention relates to a concave polyhedron streamlined suspended lightweight filter material, a preparation method and an application. The filter material is a cuboid, the six faces of the cuboid are concave surfaces, and each concave surface is formed by splicing four inclined triangular planes with each other. The preparation raw materials of the material include amino acid-modified ethylene-vinyl acetate copolymer and a cross-linking agent, and the cross-linking agent is epoxy siloxane. In the present invention, the amino acid and the hydrolyzed ethylene-vinyl acetate are used for esterification reaction, and the modified ethylene-vinyl acetate copolymer with active amino groups is obtained and the epoxy-based silicone oil is cross-linked to form a three-dimensional network structure. ‑Vinyl acetate copolymer and ethylene‑vinyl acetate copolymer are used as the base material to prepare the filter material. The crosslinking reaction between the bridging agent and the copolymer, the crosslinking agent and the modified ethylene vinyl acetate copolymer occurs simultaneously. , the obtained lightweight filter material with three-dimensional network structure has low compression set, and can quickly filter the initial rainwater with lasting and high efficiency.

The invention discloses a rosin production and processing technology. The technology comprises a grease storage pool, the grease storage pool is connected with a metering tank, the metering tank is connected with a dissolving pot, and the dissolving pot is connected with a waste residue recovery device and a transition pot; the transition pot is respectively connected with the primary filter and the waste liquid recovery device, the waste liquid recovery device is connected with the metering tank, the primary filter is respectively connected with the clarifying tank and the waste residue recovery device, the clarifying tank is connected with the fine filter, the fine filter is connected with the storage tank, and the storage tank is connected with the vacuum distillation pot; the dissolving pot, the clarifying tank and the vacuum distillation pot are all connected with the steam generator; the steam generator is connected with the natural gas heat-conducting oil boiler; the vacuum distillation pot is respectively connected with two discharge pipes, one discharge pipe is connected with a condenser, the other discharge pipe is connected with a product collecting device, the vacuum distillation pot is connected with a buffer tank, and the buffer tank is connected with an oil-water separator. And the first-grade product rate of rosin production and processing is improved.

The invention belongs to the technical field of oilfield produced water treatment and particularly relates to a low permeability high water content oilfield potential difference type oil and water collection process. The process includes the following steps of 1) oil collection which includes conducting preliminary sedimentation on produced oil from a single well by adopting a dirty oil tank, adopting a transporting device to pull the water-cut oil on the upper part obtained after preliminary sedimentation to the nearby combination station to be subjected to purification and then transported out; 2) water collection which includes discharging oily sewage on the lower part and obtained after preliminary sedimentation of a single well into a low level water tank and then enabling the oily sewage in the low level water tank to flow into a water collection station by connecting a water collection pipeline; 3) produced water treatment and reinjection: delivering the oily sewage collected in the water collection station into the reinjection station through the water supply pipeline and delivering the treated oily sewage back to the single well through a reinjection pipeline for reinjection. By means of the process, the produced oil is treated and transported away, the water is collected, treated and re-injected, the built facilities are fully utilized, and operation cost is saved.

The invention discloses a method for treating glyphosate mother solution, which comprises the following steps of: adding aqueous solution of calcium hydroxide into the glyphosate mother solution to regulate pH until the solution is alkaline and make triethylamine hydrochloride in the mother solution generate triethylamine simultaneously; adding the treated glyphosate mother solution into a distillation tower for distillation, and collecting 40 to 100 DEG C fractions on the top of the tower; adding a dehydrating agent into the fractions on the top of the tower to obtain the triethylamine; and adding hydrochloric acid into the mother solution at the bottom of the tower to regulate the pH until the solution is neutral, performing solid-liquid separation and treating and discharging separatedwaste water. The process is simple and high-efficiency; the recovery rate of the triethylamine is over 98.5 percent; the chemical oxygen demand (COD) of the discharged waste water is less than 500mg / L, total phosphate (TP) is less than 1mg / L and ammonia nitrogen is less than 15mg / L; the zero emission of the waste water is basically realized; and the method has great environmental benefit and economical benefit.

The invention relates to the technical field of organic wastewater treatment, in particular to a design method for an activated sludge adsorption bed. A water distribution pipe is arranged at the bottom of the activated sludge adsorption bed, and a mud-water mixed layer is located at the bottom of the activated sludge adsorption bed. The water distribution pipe is located at the bottom of the activated sludge adsorption bed. In the lower part of the mud-water mixing layer, there is also a biologically active sludge discharge and self-reflux system in the mud-water mixing layer. The biologically active sludge discharge and self-reflux system includes: a suction pipe and a return pipe, and the upper part of the mud-water mixing layer is The sludge adsorption layer is equipped with fillers, the biological sludge inlet pipe is located on the upper part of the sludge adsorption layer, a mud-water separation layer is arranged above the biological sludge inlet pipe, and fillers are installed in the mud-water separation layer. According to the design method of the activated sludge adsorption bed of the present invention, the remaining sludge in the aerobic sedimentation tank enters the activated sludge adsorption bed, and the adsorption of the remaining activated sludge is used to make the remaining sludge absorb and take out part of the organic matter in the sewage. Purpose.

The invention provides a sewage treatment method of a casing plant, specifically relates to a water pollution treatment method for industrial production of heparin sodium in the casing plant, and aims at solving the problems of high concentration of CODcr (Chemical Oxygen Demand), BOD5 (Biochemical Oxygen Demand), Na<+>, Cl<-> and ammonia nitrogen in sewage of the casing plant, existence of macromolecular organic matter, and large change in effluent volume. The method comprises the following steps: stopping dross through a grid; separating suspended solids; removing dust; separating oil; separating animal fat and insoluble protein on the surface layer; regulating water volume and quality; treating by decomposing by anaerobion through an UASB (Upflow Anaerobic Sludge Blanket) anaerobic reactor; treating by decomposing by aerobic bacteria through a two-stage biological contact oxidation pond; treating sludge; separating by air flotation; draining. The sewage treatment method of the casing plant is applicable to the field of treatment of sewage produced by the casing plant.