Jinchang City Sewage Treatment Equipment - Hospital Sewage

The control of indicators such as humidity, temperature, pH value, filler porosity, and residence time is crucial during the operation of a biological deodorization system. If it can operate continuously and normally according to the design conditions, its advantage of low operating costs is still quite obvious. Especially suitable for large-scale sewage treatment plants, where the odor source is relatively stable and the odor volume is relatively large, but the professional quality requirements for the operators are relatively high, otherwise the biological filter will be difficult to operate normally according to the design conditions;

（3） Application of Ionic Deodorization Technology

Ionic method is mainly used for low concentration odor treatment and can be applied to solid waste and sewage treatment industries, but it should be developed according to actual needs. Research has shown that the ion method can achieve a removal rate of up to 90% for organic odor components such as acetic acid and aldehydes, but the removal rate for H2S and NH3 does not exceed 45%. It is also necessary to consider that the key component of the ion generator, the ion tube, will gradually decline over time, and the corresponding deodorization efficiency will also gradually decrease. According to the information provided by the ion tube manufacturer, after 1-2 years of use, the ion intensity generated by the ion tube will decrease to a certain extent. And for the environment of sewage treatment plants, due to high humidity, their treatment efficiency will also be greatly affected.

1、 Overview

Hospital wastewater is complex in composition and has good biodegradability. In the early days, simple physical and chemical precipitation or air flotation were mostly used, followed by chlorine dioxide disinfection treatment. With people's increasing demand for environmental quality of surrounding water bodies and stricter control indicators for pollutant emissions (such as BOD and COD), our company adopts mature“Pre treatment - Acid hydrolysis - Two stage contact oxidation - Chlorine dioxide disinfectionThe process of comprehensive processing. The wastewater is pre treated through sedimentation and sieve filtration before entering the regulating tank. Biochemical treatment uses "acidification hydrolysis aerobic" to degrade and remove pollutants in the wastewater through multi-level microbial metabolism. The biochemical wastewater is separated into sludge and water using a sedimentation tank, and the supernatant is disinfected with a strong oxidant to achieve sterilization and meet discharge standards.

Comprehensive wastewater treatment adoptsHydrolysis acidification+contact oxidation+disinfectionOne step removal of residual suspended biological solids, chromaticity, dissolved and gelatinous organic pollutants in wastewater, ensuring stable and compliant treated effluent.

2、 Explanation of sewage treatment process

This project designs a combined process of hydrolysis acidification and contact oxidation. Activated sludge process and contact oxidation process are one of the early applied aerobic biological treatment technologies for wastewater, mainly composed of activated sludge, contact oxidation tank, secondary sedimentation tank, aeration system, etc. The wastewater in the aerobic biological oxidation tank is treated by the combined action of microbial flocs in the activated sludge and biofilm formation on the packing material, which increases the retention of organisms in the aerobic treatment system, thereby increasing treatment efficiency and reducing reactor volume. At the same time, due to the biofilm system used in contact oxidation, the fixation effect of bacteria is beneficial for fixing slow growing and long-lasting nitrifying bacteria, which improves the removal rate of ammonia nitrogen in wastewater. Under the condition of aeration and oxygenation, aerobic bacteria and protozoa in the bacterial colonies and biofilms adsorb, oxidize, and decompose organic pollutants in wastewater. Aerobic bacteria use their secreted enzymes to decompose colloidal organic matter in wastewater into soluble organic matter, which permeates through the cell membrane of aerobic bacteria and enters their cells. Then, through the biological activity of bacteria, organic matter is oxidized and decomposed, and new cells are synthesized. Under the action of enzymes in the bacterial body, organic matter is decomposed into carbon dioxide and water. During this process, bacteria utilize the energy and nutrient products obtained from decomposing organic matter to synthesize new protoplasts, allowing them to gradually grow, divide, and proliferate; The biofilm in the contact oxidation tank also thickens accordingly. When the biofilm grows to a certain thickness, oxygen cannot be transferred to the inside of the biofilm, forming a certain anaerobic environment. The CH released in the anaerobic environment₄Waiting for gas, as well as the action of aeration hydraulic stirring, causes the excessively thick biofilm to fall off, and biofilm fragments flow out of the contact oxidation tank into the secondary sedimentation tank.

Aerobic biological reactions rely on aerobic microorganisms to oxidize and decompose pollutants in water. The mechanism is that under aerobic conditions, microorganisms adsorb organic matter from wastewater as nutrients for synthesis and decomposition metabolism in order to survive and grow. The aerobic process adopts activated sludge aeration and biological contact oxidation aeration. Activated sludge aeration relies on aerobic microorganisms to oxidize and decompose pollutants in water. The oxygen required for microbial metabolism is supplied by blowers and aerators. The mechanism of aerobic microbial degradation of organic matter in wastewater is that under aerobic conditions, microorganisms adsorb organic matter in wastewater as nutrients for synthesis and decomposition metabolism for their own life and growth and reproduction. The biological contact oxidation tank consists of four parts: tank body, packing, water and gas distribution system, and is the main part of aerobic treatment. Adopting a push flow structure, different biological fillers are set according to the changes in sewage concentration to adapt to the changing needs of treatment load. The aeration device in the pool uses microporous aerators, which have the advantages of reliable operation, high oxygenation rate, and effective reduction of operating power consumption. The blower adopts Roots blower and takes complete sound insulation measures to prevent secondary pollution.

After entering the biological contact oxidation tank, the wastewater comes into contact with the packing material, and microorganisms attach to the packing material. The organic matter in the water is adsorbed, oxidized, and partially converted into new biofilms by microorganisms, and the wastewater is purified. This process distributes air directly under the packing material, and the biofilm is directly stirred by the airflow, which accelerates the renewal of the biofilm, maintains its high activity, and can overcome blockage.

This process has a large processing capacity, high removal rate, strong resistance to the impact of load changes, strong adaptability to sudden changes in water quality and quantity, low residual sludge volume, convenient operation and management, and a stable pollutant removal ability at a certain level, overcoming the sludge expansion problem of traditional activated sludge process. Due to the advantages of both activated sludge method and biofilm method, as well as the ability to reduce one-time investment and land occupation, this process has been widely promoted and applied in engineering.

5、 Characteristics:

The * feature of this process is that it provides a time program for wastewater treatment, with the following characteristics:

1) The sludge has high activity, good aeration effect, and high treatment efficiency.

2) Resistant to impact loads. It has a water resistant impact load. At the same time, high concentration sewage gradually enters the reaction tank and has a dilution effect, so it is also resistant to water quality shock loads.

3) The effluent quality is good. Under the same conditions, aerobic aeration tank has high sludge activity and fast degradation rate of organic matter. On the other hand, it also has a higher substrate removal rate than the mixed type, and has a certain degree of nitrification reaction to remove phosphorus and nitrogen.

The extract obtained from natural plants not only has deodorizing function, but also features such as safety and ecology. The mechanism of action is that plant fluids contain a large number of active functional groups, including double bonds, hydroxyl groups, etc. After contact with odor molecules, they can quickly decompose, displace, and combine, making them odorless products. The application space of plant liquid deodorization technology is not limited, and different forms such as on-site atomization, source spraying, and centralized treatment can be selected. It is also the main application form of odor control in urban spaces at present.

Activated carbon adsorption is one of the early deodorization methods, which has a high efficiency in treating organic odors. However, due to frequent replacement of activated carbon, inconvenient operation, high pressure loss, and low adsorption capacity for inorganic components, its application in the deodorization field of sewage treatment and solid waste treatment is becoming less and less. Currently, there are still some cases in China that have been applied to deodorization in garbage transfer stations. However, overall, activated carbon adsorption will gradually be replaced by other technologies in the deodorization of sewage treatment and solid waste treatment industries.

Jinchang City Sewage Treatment Equipment - Hospital Sewage