WASTEWATER & SEWAGE
What is a wastewater treatment system?
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Wastewater treatment is a process which removes and eliminates contaminants from wastewater and converts this into an effluent that can be returned to the water cycle. This process involves various physical, chemical and biological processes to treat wastewater to ensure its safe disposal or reuse.
What are package wastewater treatment plants?
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Package wastewater treatment plants are pre-manufactured treatment facilities used to treat wastewater in small communities or on individual properties. Compared with traditional wastewater treatment facilities, package wastewater treatment plants have a more compact structure and are characterized by convenient transportation, plug-and-play, and stable operation.
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What is biological wastewater treatment?
Biological wastewater treatment is designed to degrade pollutants dissolved in effluents by the action of microorganisms. The microorganisms utilize these substances to live and reproduce. These microorganisms consume the pollutants matter present in the wastewater, converting it into harmless by-products such as carbon dioxide, water and biomass. This method is commonly used in municipal and industrial wastewater treatment plants to remove contaminants and allow water to be safely discharged into the environment.
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What is the most common wastewater treatment?
The most common wastewater treatment technologies are divided into three categories: physical treatment, chemical treatment and biological treatment according to technical principles. (1) Physical treatment technology mainly uses gravity separation, centrifugal separation, screening and interception and other methods to separate and remove insoluble suspended pollutants in wastewater. (2) Chemical treatment technologies mainly include neutralization, coagulation, chemical precipitation, adsorption, etc. These methods can separate, recycle, or convert contaminants in wastewater into harmless substances. (3) Biological treatment technology mainly uses the activated sludge method, biofilm method and other methods to degrade and convert dissolved and colloidal organic pollutants in wastewater into harmless substances, so that wastewater can be purified.
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What are the advantages of membrane bioreactor?
Compared with the traditional activated sludge process, membrane bioreactors have the advantages of small footprint, strong impact load resistance, and low sludge yield. The “Swift” Solar-Powerwd Sewage Treatment Bioreactor independently developed by our company is a dynamic biofilm reactor. Compared with MBR has the advantages of low energy consumption, low operating cost and easy maintenance.
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What is the new technology for wastewater treatment?
Bacteria screen filter technology utilizes the microbial flora, EPS and other substances in activated sludge to form a micron-level filtration membrane layer under the action of a special base membrane and hydraulic flow state, thereby achieving efficient solid-liquid separation of sludge and water through microgravity water production.
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What does a membrane bioreactor do?
Membrane Bio-Reactor (MBR) is a highly efficient sewage treatment facility that combines biotechnology with membrane technology. It uses membrane separation technology to replace the secondary sedimentation tank in the traditional activated sludge process to achieve efficient solid-liquid separation and provide the possibility for deep nitrogen and phosphorus removal.
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What is a sewage treatment tank?
A septic tank is a domestic sewage pretreatment facility used to treat feces and perform filtering and sedimentation.
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What are the parts of a membrane bioreactor?
The membrane bioreactor is mainly composed of a reaction tank body, membrane components, water collection system, aeration system, effluent system, etc.
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What is the most common activated sludge process?
Common activated sludge processes include A/O (anaerobic/aerobic), A2/O (anaerobic-anoxic-aerobic), oxidation ditch, SBR (sequential batch activated sludge process), etc.
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What are the advantages of modular wastewater treatment systems?
The modular wastewater treatment system is flexible and can be combined and matched according to the actual situation on site to achieve the best sewage treatment effect. The equipment is highly integrated and easy to transport and install. It has low cost and small footprint.
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What materials are used in wastewater treatment?
Materials used in wastewater treatment include but are not limited to activated carbon, filter paper, filter membrane, filter sand, chemical reagents, bacterial agents, etc. These materials are used to remove suspended matter, heavy metals, organic matter and other pollutants in wastewater in order to purify water quality. For example, activated carbon can adsorb organic matter and certain heavy metals in wastewater, filter paper and filter membrane can filter out larger particles and microorganisms, and filter sand is used to remove suspended matter and some organic matter. In addition, chemical reagents such as flocculants and precipitants are also used to help separate and remove pollutants in wastewater. The choice of materials depends on the specific composition of the wastewater and the treatment objectives.
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What is the most common activated sludge process?
Common activated sludge processes include AO process, A2O process, oxidation ditch process, SBR process and CASS process.
SOLID WASTE
What are the methods of municipal solid waste (MSW) disposal?
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Common MSW disposal methods include landfilling, incineration, recycling and composting. MSW can be considered a complex matrix since it consists of several types of wastes, including organic matter from food waste, paper waste, packaging, plastics, bottles, metals, textiles, yard waste, and other miscellaneous items.
Incineration, also known as waste-to-energy, involves the controlled burning of municipal solid waste. The heat generated by this process is used to generate electricity or heat. Incineration reduces the amount of waste and generates energy, making it an attractive solution for cities with limited landfill space.
Recycling and composting are sustainable waste management practices that aim to divert waste from landfills. Recycling involves collecting and processing materials such as paper, plastic, glass and metal to create new products. Composting involves breaking down organic waste, such as food scraps and yard trimmings, into nutrient-rich compost that can be used in gardening and farming. These methods reduce the consumption of natural resources and minimize environmental impact, but require effective waste sorting and collection systems.
What is an aerobic food digestion equipment?
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The aerobic food digestion equipment uses microbial aerobic fermentation technology to quickly decompose and convert food waste into humus. It has the characteristics of high-temperature fermentation, environmental friendliness and low energy consumption. It is often used for food waste treatment in communities, schools, villages and towns. The equipment realizes on-site "reduction, resource utilization and harmlessness" treatment of food waste.
How does a garbage incinerator work?
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The garbage incinerator adopts pyrolysis and gasification technology. The sorted and broken garbage is decomposed into combustible gases mainly composed of CO and H2 in the first combustion chamber due to a lack of oxygen or low oxygen. These combustible gases enter the second combustion chamber from the first combustion chamber through the air holes, and are burnt with oxygen in the second combustion chamber, thereby reducing waste and recovering heat. The burned gas meets the emission standards after subsequent flue gas treatment. After burning, about 10% of the waste residue is discharged and can be landfilled or paved.
What garbage is burned in the incinerator?
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The garbage incinerator can incinerate classified municipal solid waste and other domestic waste, such as rubber and plastics, paper, knitting, plastics, etc. Garbage that cannot be incinerated includes large electrical appliances, construction waste, stones, soil, and large and long strips of waste. Large, long strips of garbage such as quilts and hemp ropes will become entangled in the crusher, feeding screw and other equipment in the pretreatment equipment, causing the equipment to be unable to operate or even damage the equipment.
Is incineration better than landfill?
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The current landfills add anti-seepage systems and leachate collection and treatment systems during infrastructure and coverage to reduce the possibility of secondary pollution during the landfill process. However, it still cannot change the disadvantages of landfills occupying a large area and emitting greenhouse gases such as methane. Incineration achieves waste reduction to a large extent, and the complete incineration process is equipped with a flue gas purification system to reduce the waste gas content to the greatest extent. The biogas residue generated after incineration is then landfilled, which reduces the burden on the landfill and avoids the generation of permeate.
What is the difference between composting and a digester?
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Composting is mainly aerobic or hypoxic fermentation to produce organic fertilizer. Digesters mostly refer to anaerobic processes such as biogas digesters, which convert organic waste into fuel or electricity. The appropriate fermentation process can be selected according to the composition of organic waste and the organic matter content.
What waste cannot be incinerated?
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Waste that cannot be incinerated includes food waste with too high water content, stones and muck with low calorific value, high ash content, and incombustible soil, construction waste, and large electrical appliances. Some industrial waste, hazardous waste, and laboratory waste require professional treatment and then selective incineration. For HYHH's 0.5-30t/d High Temperature Pyrolysis Waste Incinerator, in addition to the above garbage, there are also large-volume and long domestic garbage, such as quilts, hemp ropes, etc., which also need to be picked out from the garbage pool, otherwise Can damage pretreatment equipment.
How does a waste digester work?
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The automatic feeding system of the waste digester dumps the food waste in the garbage bin onto the sorting platform. After picking out the non-fermentable garbage, the digester crushes and dehydrates the waste. The solid garbage enters the aerobic fermentation system to produce organic fertilizer matrix, the liquid enters the oil and water treatment to recover grease, and the remaining waste liquid is treated and discharged in compliance with the standards.
What is incineration treatment of municipal solid waste?
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Municipal solid waste incineration is a process of reducing the volume of combustible municipal solid waste collected and sorted and incinerating it. After the domestic waste is collected, it is transported to the waste transfer station for sorting. Recyclable waste such as metals and plastic bottles is recycled, wet waste can be composted, and the remaining combustible waste is transported to the waste incineration plant for combustion disposal.
What is the best way to process food waste?
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Composting and fermenting food waste can achieve volume reduction and produce organic fertilizer matrix for greening fertilization. For centralized treatment of large amounts of collected food waste, it is recommended to use microbial aerobic fermentation technology, which has a fast processing speed, is safe and pollution-free, and can recycle grease and organic fertilizer.
How can we make food waste decompose faster?
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Sufficient stirring can speed up the decomposition of food waste. For the treatment of food waste, microbial aerobic fermentation or anaerobic fermentation technology is usually used. Stirring can increase the contact area between microorganisms and food waste, allowing microorganisms to be more evenly distributed on the surface of the waste. In addition, providing microorganisms with suitable temperature, humidity, and oxygen content can also promote the decomposition process.
How to dispose of chicken poop?
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Chicken manure produced by farms can be fermented at high temperature. High-temperature aerobic fermentation technology is to add high-temperature aerobic microorganisms and stirring processes to compost to accelerate the decomposition of organic matter in chicken manure and eventually produce organic fertilizer. If the amount of chicken manure produced is large, anaerobic fermentation technology can also be used to produce methane and other renewable energy sources. However, the produced biogas residue needs further treatment.
What is the use of OWC(Organic Waste Convertor) ?
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OWC (Organic Waste Convertor) is a process of recycling organic waste such as fruit peels, leftovers, etc. produced in daily life. Organic waste is not easy to store and produces unpleasant odors after decay. OWC equipment converts organic matter in organic waste into small molecular organic matter, and the produced organic fertilizer is easier for plants to absorb. The whole process reduces the volume and weight of organic waste, produces almost no odor, and can also be recycled.
How long does chicken poop need to compost?
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7~10 days. The traditional natural composting of chicken poop may take 2-3 months to fully mature. However, with the intelligent integrated high-temperature manure fermentation tank, the time required to achieve the same effect can be shortened to 7~10 days. The difference is mainly in the choice of process. The high-temperature fermentation tank provides a suitable living environment for the fermentation bacteria, which speeds up the decomposition and maturity process.
How do you make organic fertilizer from pig manure?
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The pig manure, reflux material and biological fermentation bacteria are mixed evenly, and the temperature and oxygen suitable for the survival and reproduction of the fermentation bacteria are provided. The fermentation bacteria decompose the macromolecular organic matter in the pig manure into simple organic matter that can be absorbed by plants, thus realizing the transformation of pig manure into organic fertilizer. HYHH’s Manure Fertilizer Fermentation Tank has realized the automatic control of the process of making organic fertilizer from pig manure. It is easy to operate and can be remotely controlled.
What is an example of organic waste?
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Organic waste mainly includes kitchen waste, food waste, green waste and other waste with high organic content and easy to rot. Specifically, fruit peels, eggshells, leftovers, vegetables, fallen leaves, straw, etc. are all organic waste.
How is organic waste managed?
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Organic waste has the characteristics of high organic matter content, high water content and easy decay. The collected organic waste can be treated by aerobic fermentation, anaerobic fermentation or composting. Aerobic fermentation and composting produce organic fertilizer, while anaerobic fermentation mainly produces biogas and other recyclable energy.
WATER PURIFICATION
What is reverse osmosis?
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Reverse osmosis (RO) is a means of pulling clean water out of polluted water or salt water by pushing water through a membrane under pressure. An example of reverse osmosis is the process by which contaminated water is filtered under pressure. This technology is widely used to improve the taste and quality of drinking water.
What are the machines used in water treatment?
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HYHH's water purification equipment mainly includes DW intelligent integrated drinking water purification station and reverse osmosis integrated machine. The processing capacity can be customized according to needs.
What is a nanofiltration system?
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Nanofiltration is a pressure-driven membrane separation process between reverse osmosis and ultrafiltration. It is used to separate substances with relatively small molecular weight, such as inorganic salts, or small molecular organic substances such as glucose and sucrose, from solvents. The pore size of nanofiltration membranes ranges from a few nanometers.
Is NF better than RO?
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In terms of filtration accuracy, nanofiltration is not as good as reverse osmosis. The pore size of reverse osmosis membrane is 0.002~0.0003μm, which can intercept dissolved salts, colloidal particles, bacteria, viruses, microorganisms, organic matter, inorganic minerals, and heavy metal substances except water molecules, some small molecules, ions, etc., while nanofiltration membrane does not have such high filtration accuracy.
Do you need an UV light for reverse osmosis?
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No. The reverse osmosis membrane itself can filter out most bacteria, heavy metals, etc., and there is no need to add ultraviolet lamps for disinfection and sterilization. In addition, adding ultraviolet lamps may shorten the service life of some pipelines inside the equipment. If filtering surface water such as rainwater and well water, ultraviolet double disinfection can be added before reverse osmosis.
Does reverse osmosis remove bacteria?
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Reverse osmosis membrane can remove most bacteria in tap water. The bacteria removal rate of reverse osmosis membrane varies depending on the membrane pore size. Our company's reverse osmosis integrated machine can remove bacteria, viruses, etc. in tap water at a removal rate of more than 99%.
What does a reverse osmosis water system do?
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It intercepts impurities in water such as soluble solids, organic matter, colloids and bacteria to achieve the purpose of separation and purification.
What is not removed by reverse osmosis?
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Although reverse osmosis membranes can filter out most solutes, there are still some ions that cannot be filtered out by reverse osmosis membranes, such as sodium ions (Na+), calcium ions (Ca2+), magnesium ions (Mg2+), etc.