Lanzhou City Sewage Treatment Equipment - Hospital Sewage​

According to statistics, approximately 41% of electroplating factories in China use chemical methods to treat electroplating wastewater; In Japan, chemical laws account for about 85% of the total governance in the country. This method has the advantages of simple and reliable operation, low investment, ability to withstand large amounts of water and high concentration loads, and stable effects. It is suitable for sewage treatment of various types of electroplating enterprises. However, there is also a problem of secondary pollution of electroplating sludge, and enterprises generally entrust qualified units to dispose of it.

Activated carbon deodorization technology fully utilizes the physical properties of this adsorbent. The structure of activated carbon contains a large number of voids that cannot be observed by the naked eye, with a surface area ratio of 700-2300 square meters per gram, which has a good adsorption effect on odor gas pollution. Meanwhile, due to its use of only physical properties, it is convenient to use, has minimal side effects, and is relatively low in cost. However, the deodorizing effect of activated carbon is very limited; With the continuous development of material technology, new activated carbon fiber products have emerged. By using fibrous precursors and programmed carbonization activation treatment, they have the advantages of fast adsorption and desorption, low pressure loss, low powdering, and increased adsorption capacity. They also have certain alkali and acid resistance characteristics and can be processed into different forms of daily necessities; At present, the most common activated carbon deodorization technology is the "catalyst type", such as potassium permanganate activated carbon, potassium hydroxide activated carbon, etc. Essentially, it meets the combination of chemical and physical effects, thereby achieving better odor control effects.

1. Septic tank
Septic tanks mainly play a role in breaking down large molecular chains, improving the biodegradability of wastewater, and decomposing organic matter such as feces. The sludge in the septic tank should be cleaned regularly, depending on the temperature of the sewage and the local climate conditions. It should be cleaned annually1—2Next time. The cleaning interval should not be too short, otherwise the sludge in the septic tank has not yet been digested and decomposed. Additionally. When cleaning sludge, a certain amount of sludge should be left behind (approximately20%), in order to facilitate“new”The digestion and decomposition of sludge. The sludge cleared from septic tanks should be further treated or disposed of harmlessly. The effective capacity of the newly built septic tank is100m3Considering that the hospital's original sewage treatment plant and septic tank were abandoned together, it is recommended to build a new septic tank100m3One septic tank and two septic tanks are used in parallel. The sewage from the west courtyard and the east courtyard each use one septic tank. After passing through the septic tank, the sewage enters the sewage treatment plant together.
2. Grid well
Before hospital sewage enters the sewage regulation tank through the septic tank, a grille should be installed to intercept larger debris and suspended solids in the sewage, prevent these debris from blocking the water pump and affecting the next treatment process. The effective volume of the grid well is3m3.
3. Hydrolysis acidification tank
The hydrolysis acidification process is an efficient treatment unit that integrates sedimentation, adsorption, biological coagulation, and biodegradation, which can significantly remove suspended solids or organic matter in wastewater and improve its biodegradability. The new effective volume for hydrolysis acidification is150m3.
The design parameters are hydraulic retention time:T=3.0hOrganic load:F=1KgCOD5/（m3•d）. Pool type: single-stage series connection. Materials and equipment: Sludge return pipe.
4. Contact oxidation aeration tank
The effluent from the regulating tank is lifted by a submersible lift pump to the contact oxidation tank for biochemical treatment. Contact oxidation aeration is an efficient and fast biological treatment process. It combines the advantages of activated sludge process and biofilm process, with good oxygenation conditions, high volumetric load, strong impact resistance, and simple structure. According to the water quality of the sewage, the designed residence time is6hThe new type of composite packing material is selected as the filling material, which is easy to hang and detach, and will not block or pill. It is impact resistant and suitable for the large impact load of hospital sewage. The effective volume of the newly built contact oxidation aeration tank is300m3.
The design parameters are hydraulic retention time:T=6.0hAtmospheric water ratio:B=18∶1Organic load:F=1KgBOD5/（m3•d）. Pool type: Mixed aeration tank. Materials and equipment: composite packing, underwater aerator.
The oxygenation adopts an underwater aerator, which has low noise and high oxygenation efficiency. The aerator is installed underwater and can be lifted up for maintenance at any time. Its technical features are as follows:
⑴ High oxygen dissolution rate, large proportion of small bubbles, high oxygenation efficiency and wide oxygenation area;
There is no dead zone in the pool, and the horizontal water flow carrying bubbles washes every corner of the pool bottom;
⑶ The structure is simple, compact, and the unit has a long service life. The bearings that can withstand high loads, the shaft mechanical seal that uses an oil bath, and the air sucked into the impeller cavity prevent contact with the seals during operation, all of which ensure that the aerator is in good working condition24Working continuously for hours, * running;
Compared with conventional air blowing and aeration methods, there is no need to build an air blowing room, no need for air pumps and pipelines, easy installation, low maintenance workload, and less land occupation;
⑸ Flexible use, when multiple submerged aerators are installed in the pool, the number of aerators can be increased or decreased as needed, making it easy to adjust the aeration volume and achieve energy-saving effects;
When the aerator is working, it also has a stirring function to avoid sludge settling in the tank; When the air inlet is closed, it can also be used as a mixer.
5. Slant sedimentation tank
After biochemical treatment, the sewage flows into the inclined sedimentation tank for sludge water separation. The inclined sedimentation tank adopts a vertical flow sedimentation tank with a load of2.5m³/m2•hClarify the mixed liquid after aeration, settle and concentrate the sludge to achieve the treatment effect.
The design parameters are hydraulic retention time:T=2.0h.
⒍ Contact reaction tank
The effluent from the secondary sedimentation tank flows into the contact reaction tank, which is mainly used for disinfection. After adding chlorine dioxide disinfectant, it is discharged into the municipal pipeline network. To achieve the governance goals, sewage should be thoroughly mixed with disinfectants. The disinfection tank adopts contact disinfection method to ensure that sewage and disinfectants have sufficient contact and reaction, without short flow or dead corners, effectively killing pathogens and viruses. There is sufficient clearance on the water surface in the tank for regular cleaning of sludge. The effective volume of the proposed new reaction tank is50m3The reaction time is1Hour.

Characteristics of chlorine dioxide disinfection

Design principles for medical wastewater treatment equipment

1Implement national and local environmental protection policies, comply with relevant national regulations, norms, and standards. Meet the requirements of environmental protection, ensure that all indicators meet the emission standards, and comply with national announcements2005Year's Day35nameGB18466－2005Emission standards for water pollutants in medical institutions.

2With the aim of protecting urban water sources, improving the urban environment, and promoting common development, fully leverage the social and environmental benefits of constructing this project.

3Choose sewage treatment processes and equipment that are reliable, technologically efficient, cost-effective, easy to manage, require minimal maintenance, and operate flexibly,Ensure stable operation and compliant discharge of sewage treatment plants.

4Through overall optimization in the design, energy-saving technologies are adopted to save energy and minimize operating costs.

5Choose equipment with low noise to avoid secondary pollution to the environment.

6Based on the actual situation of the sewage treatment plant, while facilitating construction and installation, efforts are made to concentrate various structures as much as possible, arrange them compactly, and save land.

Processing technology

1、 Introduction to Hospital Sewage Treatment Equipment

On the basis of summarizing the operating experience of domestic and foreign domestic sewage treatment devices, combined with scientific and technological achievements and engineering practice, a complete set of organic sewage treatment devices that can be buried is designed, which is a sewage treatment equipment mainly made of carbon steel anti-corrosion materials. The main purpose is to make domestic sewage and similar industrial organic sewage meet the discharge standards required by users after being treated by this equipment. This device is mainly used for the treatment of domestic sewage in residential communities (including villa communities), high-end hotels, hospitals, slaughterhouses, comprehensive office buildings, and various public buildings. The effluent quality treated by this device meets the national discharge standards. The entire set of equipment can be buried underground

2、 Characteristics of hospital sewage treatment equipment

1. Can be buried underground, and the surface above the equipment can be used for greening or other purposes

2. No need for building, heating and insulation, fully automatic control, no personnel management, no sludge reflux operation, simple maintenance

3. The entire equipment processing system is equipped with a fully automatic electrical control system, which operates safely and reliably. Generally, there is no need for dedicated personnel to manage it, only timely maintenance and upkeep of the equipment is required

4. Low noise, no odor, long service life.

3、 Overview of Hospital Sewage Treatment Equipment

With the development of China's economy and the advancement of urbanization, the shortage of water resources and the worsening of water pollution are becoming increasingly severe. The demand for sewage treatment and reuse is becoming more and more urgent. Traditional centralized sewage treatment faces prominent problems such as difficult sewage collection, high pipeline investment, large land occupation, and long construction cycle, which seriously restrict the sewage treatment rate and COD reduction. In this situation, decentralized sewage treatment integrated technology equipment has become a beneficial and necessary supplementary measure for centralized sewage treatment.

Existing decentralized sewage treatment equipment, some only use a single aerobic biochemical treatment process, which is not ideal for nitrogen and phosphorus removal; Some use a single aeration method, which results in high energy consumption; Some use plant treatment methods such as artificial wetlands, which occupy too much land and are affected by climate, resulting in unstable operation; Some devices have low integration and poor processing efficiency; In response to the above situation, through repeated practical exploration, we have independently developed a series of integrated technology equipment for the treatment of medium and low concentration dispersed organic wastewater with the aim of achieving standard discharge and resource recycling of sewage.

4、 Application areas:

Including residential communities, rural towns, scenic spots, highway service areas, airports, docks, industrial and mining enterprises, and other difficult to treat sewage. 3. Introduction to the installation system

5、 Working principle of hospital sewage treatment equipment

The core component of integrated sewage treatment equipment is membrane bioreactor (MBR),
It is a new sewage treatment technology that combines membrane separation technology with biotechnology.
Wastewater enters the MBR system. Zone A is a facultative zone, where fillers are placed and fully contacted with activated sludge. The O zone is an aerobic zone, where a membrane module is placed and PVDF membrane is used to trap activated sludge and large molecular organic matter, eliminating the need for a secondary sedimentation tank. The concentration of activated sludge is greatly increased, and hydraulic retention time (HRT) and sludge retention time (SRT) can be controlled separately, while difficult to degrade substances continuously react and degrade in the reactor. After further processing, the treated water can meet the discharge standards or be reused. In addition, the air transported to the MBR system is also a very important part of the treatment process. It can promote the circulation of fluids in the reactor, improve the degradation efficiency of activated sludge, and also cause friction between the hollow fiber membrane fibers to clean the membrane components. The process flow is as follows: collect sewage from places and areas where municipal sewage pipelines have not yet been constructed.

6、 Specifications for hospital sewage treatment equipment

Model Total power (kW) Voltage (V) Processing capacity m3/d Dimensions (m)

MQ-AC10 3 380 10 3.3×1.6×1.8 MQ-AC20 5 380 20 5.5×1.6×1.8 MQ-AC30

7、 Advantages of hospital sewage treatment equipment

8、 Instructions for using hospital sewage treatment equipment

1. Capable of treating comprehensive sewage and similar organic sewage in daily life systems;
2. It is made of glass fiber reinforced plastic, carbon steel and stainless steel, with excellent characteristics of corrosion resistance and aging resistance, and its service life is more than 30 years;
Our company's underground hospital sewage treatment equipment adopts the world's biological treatment process - biological contact oxidation method+chlorine dioxide generator disinfection combined process, which integrates the removal of BOD5, COD, NH3-N, and Escherichia coli bacteria, and is currently the most efficient sewage treatment equipment in China. The treated sewage meets the national hospital institution sewage discharge standard GB18466-2005.
Product features:
The equipment can be buried underground, and the surface can be used as green or square land,
The equipment does not occupy surface area, does not require building, and does not require heating and insulation.
Low operating costs of equipment
The device can achieve fully automatic operation according to the set water level control mode

Biological deodorization technology mainly deals with the odor pollution caused by organic compounds, which appeared as early as the 1950s. Its main principle is the metabolic mechanism of microbial decomposition, oxidation, synthesis, etc., which converts substances containing odor into carbon dioxide, water, 4-valent hydrogen oxides, etc. The transformation process from organic to inorganic substances can achieve odor control. There are two common types of biological deodorization technology: (1) biological filter. The so-called "biological filter" refers to the pre humidified odor passing through the biological filter bed and being converted into a biofilm fixed on the surface of the filter material. The microorganisms in the biofilm can meet the work of oxidation and decomposition, converting organic matter into inorganic matter. But the drawbacks of this technology are obvious, it cannot achieve persistent operation, and the phenomenon of local compaction is very serious. (2) Biological drip filtration tower. The principle of this technology is that after pollutants are circulated and absorbed, they are continuously transported to the biofilm to achieve microbial decomposition and oxidation. However, when pollutants exceed the load of the biofilm, there will be an increase in pressure loss, leading to an anaerobic state inside the membrane and the formation of odorous gases such as hydrogen sulfide and organic acids.

Lanzhou City Sewage Treatment Equipment - Hospital Sewage