Elementary Design of Water and Waste Treatment in the Nurseries
The following are the preliminary design opinions of the kindergarten water supply and drainage profession: ** 1. Water supply system ** 1. ** Pressure and comfort ** - The kindergarten is generally a multi-storey building, and the water supply pressure should be less than 0.35MP. From the perspective of comfort, the water supply pressure of each floor should be about 0.20MP. 2. ** Water Purification Equipment ** - With the concern for the health of drinking water, qualified kindergarten could consider using a direct drinking water system. Most of the household school direct drinking water purification equipment used reverse infiltration equipment, which had the advantages of ready-made drinking water, health and safety, saving money, convenience, and no need to worry about dirt residue and harmful components in the water. 3. ** Water consumption calculation ** - Various water consumption standards, water consumption units, working hours, hour variation coefficient, maximum daily water consumption, maximum hour water consumption, etc. shall be stated or listed in a table. 4. ** Water supply method ** - If the water pressure and water volume of the external network can often meet the water requirements, and there is no special requirement for indoor water supply (such as single-story or multi-story buildings), the direct water supply method can be used, which is directly connected to the external water supply network, and the external network water pressure is used for water supply. However, when the external network pressure exceeds the permitted value, a pressure reduction device should be installed. - If the external network pressure is periodically insufficient and the indoor water pressure is required to be stable (multi-story building), the water supply method of setting up a water tank can be used, which is directly connected to the external water supply network to use the external network pressure to supply water. At the same time, a high-level water tank is set up to adjust the flow and pressure. - If the pressure of the external network is often or intermittently insufficient, the external network allows direct pumping (multi-story building), and the water supply method of water pump and water tank can be used. The water pump directly draws water from the external network to increase pressure and uses the high-level water tank to adjust the flow. When the external network pressure is high, it can also directly supply water. If the municipal department does not allow direct pumping, it is necessary to add a pool to draw water from the pool. ** 2. Hot Water System ** 1. ** Heat Source Selection ** - In terms of heat sources, it could be divided into electric energy, gas, solar energy, and air heat. - The electric water heater includes the storage-type and the instant-heating type. The storage-type electric water heater is large in size, the water storage tank takes up space and needs to be pre-heated. The instant-heating electric water heater has high power, high requirements for the circuit, and high manufacturing costs for hot water. - The initial investment of the gas water heater was low, the thermal efficiency was high, the heating speed was fast, and the water temperature was constant. However, it produced waste gas and was dangerous, so it was not suitable to be installed in the kindergarten building. - The solar water heater had a clean energy source and low cost of producing hot water, but it was greatly affected by the weather and needed an auxiliary heat source. - The air-source heat pump water heater had a clean energy source, low cost of hot water production, and was not affected by the weather, but it was not suitable for use in cold areas. The kindergarten should choose the heat source based on the actual situation. 2. ** Hot water supply method ** - Considering that there was a holiday period in the kindergarten and the number of children was small, it was appropriate to use a distributed hot water supply. Water heater was set up near the hot water point. The pipe network was short, the heat loss was small, and the reconstruction and expansion were more convenient. Although there were disadvantages such as inconvenient management, occupying more total building area and higher total equipment cost, it was convenient for the operation and management of the kindergarten to avoid unnecessary energy waste. 3. ** Hot water temperature ** - The hot water temperature of the kindergarten shower was 35 degrees, and the water temperature of the sink faucet was 30 degrees. The hot water temperature supplied by the water heater should be higher than these two temperatures. A constant temperature water mixing valve should be set to ensure that the water temperature of the faucet was constant, not affected by the change of water temperature, flow rate, and water pressure. When the cold water was interrupted, the hot water could be automatically turned off to play a safety protection role. - The kindergarten should be equipped with a water boiler. The location of the water boiler should be close to the teacher's office and there should be measures to prevent children from entering by mistake to prevent burns. ** 3. Water drainage system ** 1. ** Diagram of drainage pipes ** - It should not be placed above the non-staple food operation and cooking in the canteen and the food industry. It should not be placed above the medical health care room and the dining area of the classroom. When the conditions cannot be avoided, protective measures should be taken. - The location of the drainage pipe should not be close to the outer wall of the dormitory. ** 4. Fire Protection System ** 1. ** Fire Hydrant System and Automatic Sprint System ** - The design of the fire extinguisher system and the automatic sprinkling system should be carried out, and the design basis, design parameters, water supply method, equipment selection and control method should be specified. ** 5. Design basis and scope ** 1. ** Based on ** - The contents related to the design of this discipline in the approval documents and basis data listed in the general design description shall be extracted to clarify the main regulations and standards adopted by this project, as well as the design data of this project provided by other disciplines and the municipal conditions available for the project. 2. ** Range ** - According to the design task book and relevant design information, explain the design content and division of labor of the specialty (when there are other units to design together). Read more exciting novels for free
Waste Water Treatment
I recommend a few novels to you. 'My Fish Pond Became the Pollution Outfall of the Immortal World' was super interesting. The author was super light. In order to save the cost of immortal energy, the immortal world had to waste water. Zhu Renming's fish pond had become the sewage outlet of the immortal world on Earth. Chang'e's bathwater, Kitchen God's kitchen sewage, and so on were all discharged into it. Some people had read nearly 300 chapters and saved them to fatten themselves up. The author of " Dark New Era " loved spicy food. This was a fantasy novel. It was about a soul who had transmigrated to the dark world of the Shelter and wanted to change his fate to save a kind person. There was also detailed information about the character. The overall evaluation was that it was a dark work that could be seen. The Future Mother System of the Apocalypse, written by Yue Ziyi. The water flow meter was scammed by the Holy Mother System. After the apocalypse, it was still scammed into a five-year-old loli and thrown into a garbage city. However, the female protagonist was a genius, but she was a little scammed. " Curse of the Water Corpse Tomb " was a modern romance novel written by Ming Mo. The absurd sacrifice in the water-deficient villa, the unwillingness of the dead bride to remain silent, and the story after the curse broke out was very mysterious. 'King: From the Tauren's Cultivation,' I wrote it as a university student. In the fantasy world, there were many races and armies. The main characters were decisive and intelligent, but there were also shortcomings such as lack of writing. However, it was still worth watching. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Reaction tank for waste water treatment
There are many types of reaction tanks used in waste water treatment. The following are some common ones: 1. * * Anerobic reactor (such as UASB reactor, anerobic tank)** - * * UASB reactor **: Commonly used in the treatment of microorganisms, it is a device that uses the decomposition of organic matter by the use of microorganisms. For example, in a chemical waste water treatment system, a "UASB reactor + multi-stage contact oxidization tank" was used for biological treatment. The concentration of the incoming water was more than 8000 milligrams per liter, and the concentration of the discharged water was stably lower than 300 milligrams per liter. It had a very high removal rate of COD. Moreover, the operation was simple, stable, and the treatment cost was low. - [** Anerobic Tank (Model ic)**: This is a high-efficiency multi-stage internal circulation anerobic reaction tank.] It has the characteristics of small area, high organic load, stronger impact resistance, more stable performance, and simpler operation and management. It is suitable for the treatment of organic high-concentration waste water, such as corn starch waste water, lemon acid waste water, beer waste water, potato processing waste water, alcohol waste water, etc. The water loading rate of the UASB reactor was much higher than that of the ordinary UASB reactor, and it was generally about three times higher. When it was used to treat high-concentration organic waste water with a chemical oxygen demand of 10000 - 15000 g/1, the volume loading rate could reach 15 - 30 kg-COD3. Because it has achieved its own internal circulation (The circulation volume can reach 10 - 20 times of the incoming water), reducing the concentration of organic matter at the bottom of the reaction tank and improving the impact load resistance. The large amount of water also makes the sludge at the bottom expand, ensuring the full contact reaction between the organic matter and microorganisms in the waste water and increasing the treatment load. It is equivalent to the serial operation of the upper and lower UASB reaction tanks. The lower reaction tank plays the role of "rough" treatment, and the upper reaction tank plays the role of "fine" treatment, so that the water quality is good and stable. 2. * * Chromium-breaking reaction tank **: In the plating waste water treatment process, the chromium-plating waste water is added with acid and Na2SiO2 to reduce the chromium-breaking reaction tank. Under acidic conditions, the oxido-reduction reaction between the hexa-valent chromate and the reducing agent occurs, and the hexa-valent chromate is reduced to tri-valent chromate, which then enters the neutralizing reaction tank. 3. * * Neutralization reaction tank **: A reaction tank used to neutralize the reaction water, nickel-plated and copper waste water, and add alkali-based solutions in the plating waste water treatment process. Trivalent Chromium-Copper Ion and Ni-Metal Ion would produce fine particles of Metal Hydride under the Alkaline Condition, which would form clusters under the action of the flocculating agent to accelerate the settling and reduce the settling time. 4. * * Electrolyser **: In the secondary treatment process of the plating waste water treatment process, it is mainly used for the waste water after the coagulated settling treatment to be subjected to the electrolyser. Iron filings were used as the positive pole, carbon particles were used as the negative pole, and waste water was used as the solution to form a tiny primitive battery. Under the conditions of acidic medium and oxygen, an electrochemistry reaction occurs, producing new ecological hydrogen and iron. The new ecological hydrogen and iron could react with the oxido-reduction reaction of hexa-valent chromate and complex in water to produce iron trioxides, which had a high flocculating effect and could absorb and disperse tiny particles and organic molecules. After the electrolysation, the waste water was further coagulated and settled before entering advanced treatment. 5. * * Comprehensive filter device (can be seen as a form of reaction tank)**: It is used in the tertiary treatment of the plating waste water treatment process. Its main components include quarts sand, activated carbon, silica gel, etc. It can completely filter out the floccule precipitations and precipitations in the solution to achieve a higher filtering effect. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Industrial Park High-difficulty Waste Water Treatment Design Case e-book
The e-book, Design Case of High-difficulty Industrial Park Waste Water Treatment Technology, could be purchased on relevant e-commerce platforms at a price of 91.18 yuan. Its content was aimed at different types of high-difficulty industrial waste water. It flexibly applied mature treatment technologies at home and abroad, achieved better treatment effects through the design and development of several high-difficulty industrial waste water treatment processes, and with the help of years of technology research and development experience, described the principle and experimental nature of the new advanced catalyst and oxygen technology that was expected to be industrialized in the future. The content of the book combined theory and practice, basic principles and applications, and highlighted the practicality of the development of high-difficulty waste water treatment technology in industrial parks. Some successful engineering examples were selected for detailed introduction of technology development. It was suitable for scientific researchers and engineering technicians engaged in water pollution control. It could also be used as a reference for teachers and students of relevant majors in colleges and universities. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Final Report on the Treatment of Municipal Waste Water
Based on the provided search results, there are several documents that discuss the summary reports on the treatment of domestic sewage in rural areas. However, the specific details and content of these reports are not available in the search results. Therefore, without access to the actual content of these reports, it is not possible to provide an accurate and concise answer to the question regarding the summary reports on the treatment of domestic sewage in rural areas.
Final Report of the Waste Water Treatment Plant
Based on the provided search results, there is not enough information to provide an accurate and concise answer to the question about the sewage treatment plant's summary report.
Disadvantages of Aerobic Biology in Waste Water Treatment
Qingjian Biological Laboratory Waste Water Treatment Invitation for Bids
The Qingjian County Center for Disease Control and prevention's Nucleic Acid Laboratory sewage treatment project and equipment procurement project has issued a procurement announcement. Potential suppliers can obtain the procurement documents and submit the response documents before 2020 - 12 - 03 09:00:00. 1. Basic information of the project: - Project number: SXZB-NG- 20201118. - Project Name: Qingjian County Center for Disease Control and prevention Nucleic Acid Laboratory Waste Water Treatment Project and Equipment Purchasing Project. - [Estimated amount: 452,900.00 yuan] - Highest price: None. - Purchasing Requirement: Purchasing the sewage treatment project and equipment of the Nucleic Acid Laboratory (see the competitive negotiation document for details). The brief technical requirements and usage are for personal use. - Duration of performance of the contract: 2020 - 11 - 18 10:00:00 to 2020 - 12 - 31 09:00:00 (The specific starting and ending date of the service can be postponed accordingly to the time of signing the contract). - This project does not accept consortium bids. 2. Responding to the qualification requirements of the supplier: - It meets the requirements of article 22 of the government procurement law of the People's Republic of China. - The qualification requirements to be met for the implementation of the government procurement policy include the relevant policy requirements such as the "Temporary Methods for Government Purchasing to promote the Development of Small and Medium-sized enterprises". - The specific qualification requirements for this project: - The supplier must have a legal person or other organization that can independently bear civil responsibilities, and issue a legal and effective business license (including the scope of the project's procurement business). - Proof of tax payment: provide the tax payment certificate (bank payment certificate) or tax payment certificate that has been paid for at least one month since January 2020. Those who are exempted from tax according to law should provide relevant supporting materials. - Proof of social protection fund payment: provide the social protection fund deposit receipt that has been paid from the previous year to the time of bid opening or the proof of social insurance payment issued by the social security agency. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Waste Water Treatment Pit, Anerobic Pond, Reaction Pond
The reactor was a common reaction tank structure in sewage treatment. It used the efficient effect of the anaerobia to remove the organic matter in the waste water, but in this process, the pH value needed to be adjusted appropriately, and the operation control was more complicated. Even so, the digesting tank could remove most of the chemical oxygen demand (Biochemical oxygen demand). In the overall process of sewage treatment, the biochemical tank played an important role. It cooperated with other reaction tanks such as the acidotic tank, the anoxic-deficient tank, and the Aerobic tank to complete the deep purification of sewage. For example, the acidification pool could transform the big molecular organic compound in the sewage into small molecular organic compound that was easy to be biodegraded, which could improve the biochemistry of the sewage and lay the foundation for the treatment of sewage in the anoxia pool. The main function of the anoxia pool was to realize the detoxification, remove the nitrate-nitrogen in the sewage, and at the same time, remove part of the biochemical oxygen demand. Aerobic tanks ensured that the dissolved oxygen content in the water was stabilized at about 4 milligrams per liter by means of aerating, so as to promote the growth and reproduction of airborne microorganisms, thereby effectively removing all kinds of polluting substances in the sewage. The entire sewage treatment process was a highly integrated and interconnected system, and every part was indispensable. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The Design of Garlic Planting in the Nurseries
The following are the key points of the kindergarten's garlic planting environment design: ###1. Location of the plantation The plantation should be located at the corner of the kindergarten to avoid occupying the main area, so as not to overshadow the main area. ###2. Preparing the environment before planting 1. * * Nature observation arouses interest ** - They could make use of the existing abandoned plantations and other site resources in the kindergarten. For example, teachers could lead children to observe the land after discovering abandoned plantations near the playground, so as to arouse children's interest in planting garlic. 2. [Knowledge preparation] - Parents are invited to enrich their children's knowledge about garlic and pave the way for the garlic planting activities. 3. * * Prepare the environment and materials ** - The day before planting, organize the children to observe the teachers 'work such as soil preparation, loosening, watering, etc., so that the children have an intuitive understanding of the land preparation work before planting. - Prepare the materials needed for the plantation, such as small shovels, small rakes, kettles, etc., to provide the necessary tools for the children to participate in the garlic planting activities. ###3. Key points of environmental design during planting 1. * * Teamwork ** - For example, in the garlic planting activity in the large class, children could be allowed to work in groups freely, which would help to cultivate the children's teamwork ability. At the same time, in the process of cooperation, children could participate in the work of leveling the land together, such as leveling the land with tools such as small shovels, so as to enhance the familiarity and control of the planting environment. 2. * * Instructor's demonstration and guidance ** - When the teacher demonstrated the garlic planting process, he would hold the garlic in his hand and insert the tip into the soil, and guide the children to observe the row spacing and spacing. This was also part of the planting environment design, so that the children could clearly understand the planting layout of the garlic in the soil. 3. * * Nature Observation and Exploration ** - In the environment where garlic was planted, garlic with different planting conditions could be set up. For example, in the natural corner of the middle class, four pots of garlic growing under different conditions (such as some peeled and soaked in water, some unpeeled and soaked in water with thread, some planted in soil, etc.) could be set up to attract the children's constant attention, observation, and exploration. ###4. Post-planting environment design 1. * * Covering moisture and protection ** - After the garlic was planted, the children were guided to discuss and cover the garlic with straw, so that the children understood that the straw covered the garlic had the function of moisture and protecting the seeds from birds and pests. This was also a continuation of the planting environment design. 2. * * Regular observation and follow-up activities ** - Children were encouraged to observe the growth of garlic regularly. For example, in the extension of the garlic planting activity, children were organized to continuously observe the growth of garlic, so that the plantation became a place for children to explore the natural growth environment for a long time. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The Design of the Program of the Education in the Nurseries
The following are the general steps in the design of kindergarten education activities: ** 1. Event preparation stage ** 1. ** Confirm the activity target ** - It was determined according to the child's age characteristics, development needs, and educational program requirements. For example, for small class children, they might focus on the development of living habits, simple cognition and other goals; middle class children could increase social skills, preliminary scientific exploration and other goals; large class children could involve more complex problem solving, independent learning and other goals. 2. ** Choose event content ** - The content should be in line with the child's interests and life experience. It could be a story, a children's song, a game, or a handmade product. For example, choose a fairy tale that children are familiar with, such as "Three Little Pigs," to carry out language expression and safety education (such as building a house to withstand danger). 3. ** Prepare event materials ** - If it was a manual activity, prepare paper, scissors, glue, and other materials; if it was a story-telling activity, prepare relevant pictures or props to assist in the narration, such as preparing radish props when telling "Pulling Radish". 4. ** Planning the event venue ** - The venue was arranged according to the type of activity. If it was a sports game activity, they needed to choose a spacious outdoor venue; if it was a quiet reading activity, they needed to choose a quiet and comfortable corner with sufficient light. ** 2. Event Introduction Stage ** 1. ** Attract the attention of young children ** - You can start an activity in a fun way, such as playing a piece of cheerful music, showing off a novel toy, or asking an interesting question. For example, when carrying out an animal activity, play the audio of the animal's cry first and ask the child,"Guess what animal it is?" 2. ** Draw out the theme of the event ** - The theme of the activity was naturally drawn out based on the method of attracting the attention of the child. For example, after playing the animal sounds, he said,"Today, we're going to get to know a lot of interesting animals." ** 3. Main part of the event ** 1. ** Organizing children to participate in activities ** - If it's a group activity, make sure every child can participate. For example, in singing activities, children were encouraged to sing loudly. For shy children, more attention and encouragement could be given. - If it was a group activity, it was necessary to divide the children into groups reasonably to ensure the interaction and cooperation between the children. For example, in the building block activity, the children in the group discussed the shape of the building together. 2. ** Use a variety of teaching methods ** - Explain, demonstrate, ask questions, and discuss. For example, when teaching children to recognize colors, they first explained the names of colors, then demonstrated by showing items of different colors, and then asked the children,"What color is this item?" Children were encouraged to discuss with each other. ** 4. End of Event ** 1. ** Event summary ** - A simple review of the main content of the activity to strengthen the child's memory. For example, at the end of the activity on animal habits, he said,"Today, we learned that rabbits like to eat carrots, monkeys like to eat bananas, and puppies like to chew bones." 2. ** Evaluation of children's performance ** - Positive evaluations were given to acknowledge the child's efforts and progress. For example,"Every child performed very well in today's activity. Xiao Ming's singing voice was especially loud, and Xiao Hong was very creative when building blocks." 3. ** Extension of activity content ** - Give the child space to think or explore further. For example, after the plant growth activity, he said,"When you go home, the children can observe the plants at home with your parents to see if there are any new changes." <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>