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20280 results about "Sewage treatment" patented technology

Sewage treatment is the process of removing contaminants from municipal wastewater, containing mainly household sewage plus some industrial wastewater. Physical, chemical, and biological processes are used to remove contaminants and produce treated wastewater (or treated effluent) that is safe enough for release into the environment. A by-product of sewage treatment is a semi-solid waste or slurry, called sewage sludge. The sludge has to undergo further treatment before being suitable for disposal or application to land.

Mobile station and methods for diagnosing and modeling site specific full-scale effluent treatment facility requirements

InactiveUS20110257788A1Reduce financial riskHigh continuity of operationWater/sewage treatment by neutralisationSustainable biological treatmentInitial treatmentIon exchange
A mobile station and methods are disclosed for diagnosing and modeling site specific effluent treatment facility requirements to arrive at a treatment regimen and/or proposed commercial plant model idealized for the particular water/site requirements. The station includes a mobile platform having power intake, effluent intake and fluid outflow facilities and first and second suites of selectably actuatable effluent pre-treatment apparatus. An effluent polishing treatment array is housed at the station and includes at least one of nanofiltration, reverse osmosis and ion-exchange stages. A suite of selectively actuatable post-treatment apparatus is housed at the station. Controls are connected at the station for process control, monitoring and data accumulation. A plurality of improved water treatment technologies is also disclosed. The modeling methods include steps for analyzing raw effluent to be treated, providing a field of raw effluent condition entry values and a field of treated effluent condition goals entry values, and utilizing said fields to determine an initial treatment model including a selection of, and use parameters for, treatment technologies from the plurality of down-scaled treatment technologies at the facility, the model dynamically and continuously modifiable during treatment modeling.

Sewage treatment unit with good practicality

The invention discloses a sewage treatment unit with good practicality. The sewage treatment unit comprises a settling box, a purifying box and a disinfection box, wherein the top end of one side of the settling box is provided with a chemical reagent tank; the top of the settling box is provided with a stirring motor; a sludge discharge outlet is formed in the bottom end of the settling box; the interior of the purifying box is provided with, from top to bottom, a magnet adsorption screen, a biomembrane filter screen and an active carbon filter screen; the sidewall of the disinfection box is provided with an ozone generator; and gas-distributing pipes are arranged in the disinfection box. The sewage treatment unit provided by the invention can effectively eliminate heavy metals, microbes, organic harmful substances, particulate matters and other impurities in water, is capable of removing pigments and peculiar smell in water, and has improved sewage treatment effect; and since the ozone generator is mounted on the sidewall of the disinfection box, ozone generated by the ozone generator can be used for sterilization and disinfection of purified clear water after purification of sewage, so sewage is allowed to reach discharge standard.

Automated, self-contained, home sewage treatment system

A small and cost effective sewage treatment system intended for unattended use in individual homes, small industries or businesses in locations where a central sewage treatment plant is not available. The sewage treatment system comprises a conventional septic tank which drains into a smaller aerated holding tank, a pump to transfer effluent from the holding tank into a disinfecting chamber, a regenerative heat exchanger used to raise the temperature of the effluent while being aerated in the holding tank, means for pumping the effluent at a controlled rate through a microwave field, and a conventional drain field used to release the disinfected water into the surrounding soil. Operation of this system is fully regulated by a micro-controller, thereby eliminating the need for human intervention during normal use. This invention also incorporates electronic means for detecting various fault conditions which may impede effective disinfection, means for diagnosing what part of the system is at fault, means for reporting the fault and diagnose to a central municipal location via a telephone or transponder system, an emergency battery backup system, and means for reverting system operation to that of a conventional septic tank and drain field system is case of a total power failure (both A/C and DIC) or water pump failure. Conventional household alternating current or a battery recharged via a wind generator or solar cells may power the sewage treatment system.

Method for producing efficient composite microbial preparation by livestock and poultry liquid dung

The invention relates to a method for producing a high-efficiency composite microbial agent by using livestock liquid dung, and belongs to the technical field of environmental microbiology and agricultural science. The method comprises the following steps: diluting livestock liquid dung or livestock feces with water; after hydrolysis and acidification treatment, performing standing and settlement for desilting; mixing a supernatant obtained with a photosynthetic bacterial solution for anaerobic culture; using the mixed solution as a base liquid and stepwise adding lactobacilli, saccharomyces, bacillus thuringienesis and actinomycete into the base liquid in a proportion; and after anaerobic culture and aerobic treatment, finally filling the mixture into a biological fluidized bed for further treatment to obtain the high-efficiency composite microbial agent. The microbial agent is rich in the photosynthetic bacteria, the lactobacilli, the saccharomyces, the actinomycete, the bacillus thuringienesis, azotobacter, nitrobacteria, denitrifying bacteria and other beneficial organisms, and be widely used in agriculture, livestock breeding, fresh water aquaculture, organic sewage treatment, microbial deodorization, and other aspects. The technology is suitable to be used by various livestock farms (raisers) for liquid dung treatment.

Desulphurization method for acid gas

The invention provides a desulphurization method for acid gas, which comprises the following steps: firstly, carrying out heat combustion reaction on the acid gas and fuel in a combustion chamber; secondly, carrying out catalytic reduction reaction on the obtained combustion product; thirdly, combusting tail gas obtained by the catalytic reduction reaction; and fourthly, carrying out ammonia elution on sulfur dioxide in gas obtained after combustion to obtain ammonium sulphate. The desulphurization combined process for the acid gas has no strict requirement on the Claus combustion, does not need multistage Claus reaction, and even does not control the Claus reaction strictly; and wastewater subjected to ammonia washing in the acid gas containing ammonia is not discharged to a sewage treatment center of a factory, and a fussy device is not needed to add for ammonium refining and recovery. The method can balance the ammonia and the Clause reaction according to the yield of the ammonium sulphate, and does not have sewage discharge; heat required by the process can be balanced through by-product steam, so that the method greatly saves the investment and operation cost, and has short flow and simple operation; and the gas emission can be far lower than the national emission standard.

A high-temperature wet oxidation method for treating waste caustic soda

The invention discloses a method for treating waste lye by high-temperature wet oxidation. At 220°C to 260°C and under the pressure of keeping the waste lye in liquid phase, the waste lye is contacted with air exceeding the theoretical oxygen demand, and the waste lye is used The oxygen in the air oxidizes the inorganic sulfide and organic matter in the waste caustic so that the sulfur in it is converted into sulfate, and the organic matter is oxidized and decomposed into water and carbon dioxide; the reacted material discharged from the wet liquid phase oxidation reactor enters the high-pressure gas-liquid separator , The oxidized spent lye after gas-liquid separation and the waste lye feed are exchanged for heat, and the oxidized spent lye after heat exchange and the gas phase separated from gas and liquid enter the cooling and washing tower. Compared with the prior art, the method of the present invention has low energy consumption, the removal rate of S2- can reach 100%, the removal rate of COD can reach 75%-85%, and the waste lye after treatment can be directly discharged into the sewage treatment system, effectively alleviating the The pressure brought by the high concentration of wastewater in sewage treatment plants.

Recovery processing method of silicon slice cut waste mortar

InactiveCN101823712ALow costHigh recycling efficiencyLubricant compositionLiquid wasteWater flow
The invention relates to a recovery processing method of silicon slice cut waste mortar, comprising the following steps: (1) separating solid-liquid components in the silicon slice cut waste mortar; (2) further recovering the remained cutting liquid component in a solid; (3) separating silicon powder and silicon carbide through water flow flotation; (4) recovering the silicon powder; (5) recovering the silicon carbide; (6) coarsely filtering, finely filtering, decoloring, vacuum distilling and dehydrating the recovered cutting liquid, and adding component with corresponding amount for secondary filter. The method can get various recovered products, such as silicon carbide micro powder, cutting liquid and silicon powder, has high recovery rate and recovery profit and can save the cost of the mortar by at least 40 percent; meanwhile, the invention effectively solves the problem of possible secondary pollution caused by single recovery; the cutting function of recovered and treated silicon carbide micro powder is recovered again, thereby changing waste into wealth, realizing the resource reutilization in true sense, and promoting the development of recycling economy; and the method basically realizes the zero emission of waste liquid by reutilizing the treated waste water after combining a sewage treatment process, thereby being beneficial to environment protection.
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