The electrician is responsible for the drainage facilities in the hospital. Ensure the normal operation of drainage facilities.

Sewage treatment (wastewater treatment): the process of purifying sewage to meet the water quality requirements for discharge into a certain water body or reuse. Sewage treatment is widely used in construction, agriculture, transportation, energy, petrochemical, environmental protection, urban landscape, medical treatment, catering and other fields, and it has also entered the daily life of ordinary people more and more.

The topic of water pollution is constantly being raised, especially groundwater pollution. In Hangzhou, Zhejiang, Wenzhou and other places, farmers or entrepreneurs invited environmental protection directors to swim in the river to arouse people's attention to the seriousness of water pollution. Although all environmental protection directors have chosen silence or refusal, people's awareness of environmental protection has awakened and their concern for water pollution has reached an unprecedented level.

Surface water pollution is obvious, and groundwater pollution is shocking. 70% of China's 654.38+03 billion people drink groundwater, and more than 400 cities in more than 660 cities use groundwater as their drinking water source. However, it is reported that 90% of urban groundwater in China has been polluted.

Another set of data also shows that groundwater is facing severe challenges. 20 1 1 Beijing, Shanghai and other nine provinces and cities have evaluated 857 monitoring wells in their respective jurisdictions, accounting for 2% of Class I and II water quality monitoring wells, while Class IV and V water quality monitoring wells are as high as 76.8%.

Among the nine provinces and cities, Hainan Province has the best water quality, with Grade II as the main water quality, followed by Shanghai and Beijing, mostly Grade III, and Heilongjiang and Jiangsu have the highest proportion of Grade IV water, while Jilin, Liaoning, Guangdong and Ningxia generally only reach Grade V level.

With the increasingly serious water pollution, the sewage treatment and reuse industry has received unprecedented attention. In the past two years, the gross profit margin of various regions has remained at around 70%, and some regions even exceeded 1 000%. The industry has great development potential.