1. The frontline of environmental protection during the "war against the epidemic", the heroes in a corner of the city who should not be forgotten "Since the outbreak of the epidemic, the hearts of employees in the factory have been tense, especially those working on the front line." said the person in charge of a sewage treatment plant in Zhejiang. Source/Internet: A sewage treatment plant strengthens epidemic prevention measures On the one hand, the risk of virus exposure and infection is high, and frontline personnel themselves are under great pressure. Water is an important medium for spreading viruses. The excrement of infected people contains a large amount of viruses. The excrement carrying the virus is discharged into the sewage treatment plant through the municipal pipe network and continues to maintain the ability to infect in the sewage for a certain period...

Question: How to dispose of the methane produced by anaerobic digestion? How to take advantage?Answer: There are many ways to use it, such as fuel, power generation, etc. However, if it is used, the safety requirements are very high and the investment cost is also high. Therefore, post-combustion emissions are generally produced at home and abroad, such as those produced by anaerobic treatment devices such as AF and IC. The methane is automatically ignited and burned using a torch. It can also be used in biogas blowers, which is a good way to use it. This type of blower can be powered by electricity and biogas respectively.2. Question: This process uses submerged biofilm. Considering that adding an external carbon source requires more labor and is not economical, it also reduces dissolved oxygen and the ammonia nitrogen removal effect is not bad. The...

The concept of high-quality drinking water, the current domestic standards for high-quality drinking water and the ideas for formulating standards are introduced. Several models for achieving high-quality drinking water were proposed, and the water quality characteristics of high-quality drinking water produced by different advanced treatment processes in water plants were discussed. At the same time, the high-quality drinking water demonstration project of Suzhou's secondary water supply and quality-separated water models was introduced. 1.Thoughts on high-quality drinking water quality After carefully sorting out the high-quality drinking water standards in various places, we found that the main improvements have been made in the water quality indicators shown in Table 1. Corresponding to the national standard, high-quality drinking water has significantly reduced total dissolv...

Recently, local cases have been confirmed in many places. As of 24:00 on August 3, 2021, 31 provinces (autonomous regions, municipalities directly under the Central Government) and the Xinjiang Production and Construction Corps reported 71 new local confirmed cases and 15 new asymptomatic infections.The General Office of the National Health Commission released the Technical Guidelines for the Prevention and Control of Novel Coronavirus Infection (Second Edition). What guiding significance does it have for the current normalized epidemic prevention and control? Lan Guaping, the infection control plus operation team, brought "A look at the current normalized prevention and control of the epidemic from the second edition of prevention and control guidelines."...

Viral filtration is a common step in the production of many biologics, and viral contaminants of different particle sizes can be removed depending on the pore size of the filter. Integrity Testing (IT) is a way to confirm the retention capacity of a filter. Integrity testing before use can confirm whether the filter has been damaged during transportation and whether the filtration system is set up correctly. Post-use testing can confirm the integrity of the membrane cassette to confirm the effectiveness of the virus removal process. This article supplements the Viresolve® Pro Solution User Guide and is designed to minimize the risk of integrity test failure. Describes the key influencing factors of using automated integrity testers, troubleshooting methods and corresponding measures after test failure. The pre-filters Viresolve® Pro Shield and Viresolve® P...

The popularity of paper bags is not the result of environmental protectionFriends, the "plastic restriction order" has been implemented in China for 12 years. Are you surprised? After 12 years of hard work, plastic bags are no longer flying blatantly on the streets.The author believes that everyone has a common understanding: plastic bags pollute the environment, and most people think that using paper bags is to protect the environment. For breakfast, people subconsciously feel that paper bags are more environmentally friendly than plastic bags. So are paper bags really as environmentally friendly as people think? Beautified paper bag Paper bags are considered environmentally friendly because of their reputation for being highly recyclable and easy to decompose. But if we look at the life cycle of paper bags, you will find that it is not that beautiful.Life cycle: the entire ...