Appraisal of sewage treatment units

sewage treatment device refers to equipment that undergoes a series of purification treatments for domestic sewage, industrial wastewater and other polluted wastewater to make it meet national standards for discharge or reuse. Its role is to reduce pollution emissions, improve environmental quality, protect the ecological environment, and prevent the waste and pollution of water resources. Sewage treatment devices are widely used in cities, industrial areas, rural areas and other places, and play an important role in environmental protection and human health.
In the case of sewage treatment equipment identification, Zhongke Testing can provide sewage treatment equipment identification services.

1. Grit settling device: Grit settling tank, including horizontal flow type, vertical flow type, aeration type and bell type grit settling tank.
2, air flotation device: electrolytic air flotation equipment, diffuse air flotation equipment, dissolved air vacuum air flotation equipment and pressurized dissolved air air flotation equipment.
3, slag scraping device: air flotation slag scraper, air flotation tank slag scraper and traveling mud scraper.
4, water filtration device: siphon water filter, rotary filter, self-floating filter and mechanical filter.

GB/T 10833-2015 Technical conditions for marine domestic sewage treatment equipment
GB/T 28743-2012 Sewage treatment container equipment General technical conditions
GB/T 28742-2012 Safety technical specifications for sewage treatment equipment
GB/T 40201-2021 Technical requirements for evaluation of operation effects of rural domestic sewage treatment facilities
GB 37485-2019 Energy efficiency limit values and energy efficiency grades of submersible push-flow mixers for sewage treatment
GB/T 27888.4-2011 Ships and offshore technology Drainage systems of ships and offshore structures Part 4: Sanitary water discharge and sewage treatment pipes
GB/T 32360-2015 Ultrafiltration membrane testing method
GB/T 36137-2018 Hollow fiber ultrafiltration membrane and microfiltration membrane module integrity inspection method
HY/T 050-1999 Hollow fiber ultrafiltration membrane testing method
HY/T 062-2002 Hollow fiber ultrafiltration membrane module
0HY/T 072-2003 Rolled ultrafiltration technology Flat ultrafiltration membrane
1HY/T 212-2016 Reverse osmosis membrane hydrophilicity testing method
2HY/T 049-1999 Hollow fiber reverse osmosis membrane testing method
3GB/T 32373-2015 Reverse osmosis membrane testing method
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A sewage company discovered that there was an abnormality in the sewage treatment device, resulting in a serious drop in water purification rate and failure to meet discharge standards. After inspection, it was thought that it might be related to the ultrafiltration membrane and reverse osmosis membrane. In order to confirm the cause of the failure so that improvements can be made in the future, and also for related claims, the sewage company entrusted our company to conduct an appraisal of the sewage treatment device. The
quality analysis expert team took samples of the ultrafiltration membrane and reverse osmosis membrane in the sewage treatment device back to the laboratory to conduct component analysis, hydrochloric acid and volatile component analysis, simulation experiments, etc. The results of
show that benzene substances are attached to the membrane, and these substances are brought in by sewage and adsorbed on the membrane over many years. In a short time, the structure of the membrane is damaged, resulting in a greatly reduced filtration efficiency.