·How to place the antibiotics in the water? Although the problem of antibiotics in sewage is an old one, it is a new problem of environmental protection. However, in the view of many industry participants, relevant departments have not yet issued clear discharge standards for antibiotics in water bodies, which also indicates that more normalized and stronger control is on the way.
Antibiotics will be the touchstone to measure water quality.
Antibiotic pollution in wastewater discharge has always been a headache. According to the report of people's daily on April 27, the reporter of outlook news weekly recently found that the concentration of antibiotics in the Yangtze River Basin was on the high side and the water ecosystem was damaged.
According to a recent survey conducted by the Yangtze River Protection and Green Development Research Institute of Hehai University, the antibiotic emission in the lower reaches of the Yangtze River ranks the top three in China, with an annual emission intensity of about 60 kg / km2.
We need to know that antibiotics and other substances in the environment will cause great harm to the micro ecological environment, and once the micro ecological environment is damaged, it is also difficult to recover.
The current focus is to find out the sources and ways of pollution. Antibiotics in the water mainly come from the medical and breeding industries, among which hospital and pharmaceutical wastewater, aquaculture and livestock breeding wastewater and landfill are the key places.
These wastewater containing antibiotics are discharged into the environment water without treatment or treatment up to the standard, resulting in the increase of bacterial resistance, which seriously affects the ecological balance.
Although antibiotic residue has been listed in the law of prevention and control of environmental pollution by solid waste, the lack of effective supervision of antibiotic contaminated water leads to serious pollution of antibiotic water.
"If the use of antibiotics is not strictly controlled, there is still a trend of growth in the future." Zhang Jianyun, academician of Chinese Academy of engineering, pointed out that there is still no mandatory standard for the limit of antibiotic occurrence level in surface water environment.
The most urgent task is to establish a comprehensive prevention and control system of antibiotic pollution. In line with the principle of "polluter controls", it also requires the management of antibiotic producers and users.
On the one hand, strengthen the treatment and supervision of the sewage discharge of antibiotic manufacturers from the source; on the other hand, strengthen the purification and monitoring of domestic water and drinking water for residents.
At the legislative level, some media also suggested that antibiotic pollution should be separately listed as a pollution source for special control. To make sure that antibiotics are also a source of pollution, even more serious than carbon dioxide, sulfide and heavy metal pollution, antibiotics should be included in the normal monitoring indicators.
In the national key control section water environment monitoring platform, antibiotics are included in the monitoring indicators, and Typical Antibiotics reference indicators and limit control indicators are added to the current drinking water standard.
At the same time, the improvement of advanced treatment technology has gradually become the focus.
The reality is that there are aerobic and anaerobic biological treatment processes in the research and use of antibiotic wastewater treatment technology in China.
The removal rate of antibiotics and other organic micro pollutants in traditional wastewater treatment process is relatively low, even negative removal occurs.
The elimination of antibiotics in wastewater treatment plant is a very complex process, and the removal efficiency of different kinds of antibiotics in wastewater treatment plant is very different.
Most of the antibiotics can not be effectively removed under the existing technology, which leads to the river and lake water become antibiotic and drug-resistant gene pool.
According to the literature analysis, there are some defects in the removal of antibiotics in the unit treatment process.
As the conventional process of physicochemical treatment, such as coagulation, precipitation and filtration, it is usually unable to effectively remove some antibiotics.
Antibiotic wastewater is complex in composition, high in COD and difficult to degrade. Only physical or chemical methods can remove one or several pollutants in wastewater.
Combined processes, such as oxidation / adsorption nanofiltration, ultrafiltration nanofiltration and so on, will become the research focus in the future antibiotic removal.
The development of wastewater pretreatment or advanced treatment technology for organic micro pollutants such as antibiotics is also one of the most urgent research directions.
Membrane technology, with its green separation characteristics, has a great advantage in antibiotic removal.
The results show that the removal rate of antibiotics in wastewater is between 50% and 80% by membrane technology.
The combination of microfiltration and reverse osmosis is an effective way to remove antibiotics in advanced wastewater treatment, while ultrafiltration can not effectively remove antibiotics with small molecular weight due to its large pore size, and the removal rate of target antibiotics is only about 50%.
In addition, the waste produced in the process of wastewater treatment can be rationally treated, and the comprehensive utilization of resources can be realized.
In the future, with the more normalized and stronger control of relevant departments, the disordered development of wastewater treatment for antibiotics will be changed.
On the contrary, the supply side of the plates related to advanced water treatment and membrane equipment will also usher in a new round of opportunities.
Source: Environmental Online
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The 5th Guangdong International Water Exhibition
2020 is the end of the 13th five year plan and the decisive year to fight against pollution. Guangdong International Water Exhibition closely follows the "roadmap" of green water defense war, and goes deep into the important targets of environmental protection and PPP. In 2020, the exhibition site will present the theme sections of environmental protection water treatment, membrane and water treatment, environmental comprehensive treatment, environmental monitoring, etc., and build a "high-quality business platform for water treatment" for enterprises in the industry. During the exhibition, more than ten special forums and activities will be launched, covering industrial water saving, landfill leachate, membrane water treatment, black and smelly water treatment, etc. industry experts will gather at the scene to interpret the policy trend face-to-face, so that enterprises can get more exposure opportunities while understanding the market prospect!
Q
During the epidemic, the traditional offline mode was impacted, and neither production and sales nor exhibition activities were affected. So, what will Guangdong international water show do?
Guangdong International Water Show: model innovation and service upgrading. Through the "Online + offline" integrated marketing mode, the show will provide exhibitors with a full range of service chains before and after the exhibition, and help enterprises achieve efficient and accurate marketing results by using millions of professional buyers, rich online promotion channels and diversified resource docking.
55000 square meters of exhibition scale gathered more than 1000 exhibitors and 45000 professional visitors, presenting five themes of environmental water treatment, membrane and water treatment, comprehensive environmental treatment, environmental monitoring and water purification, and more than 10 conference activities, so that you and the industry elite can explore a new value chain of environmental protection industry.
Why attend Guangdong international water show?
The outbreak of the epidemic has had a short-term impact on industrial production activities, indirectly delaying the purchase demand of industrial water treatment equipment. However, with the stability of the domestic epidemic and the resumption of production, we expect that the purchase demand of water treatment equipment will be expected to meet blowout at the end of the second quarter and the beginning of the third quarter.
Guangdong International Water Exhibition will gather various terminal resources and dedicate itself to a high-quality, professional and efficient industry exchange event for the water treatment industry!
The organizer of Guangdong International Water Exhibition will cooperate with many industry associations and professional organizations such as Guangdong Municipal Industry Association, Guangzhou Chemical Industry Association, China Membrane Industry Association, Yishui environmental protection network, desalination branch of China water conservancy enterprise association, water saving and water treatment branch of China industrial energy saving and cleaner production association, Guangdong paper industry association, Guangzhou Pharmaceutical Industry Association, etc We have launched nearly ten special forums, and invited professional audiences from chemical industry, pharmaceutical industry, municipal units, iron and steel metallurgy and other fields to the site to help enterprises expand downstream channels.
Guangdong International Water Exhibition will continue to increase investment, increase budget and manpower to organize visitors, improve exhibition quality, and help exhibitors to obtain more business opportunities!
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