Causes of malfunctions of RO sewage treatment plant and countermeasures was written by Xiong, Qiwu;Chang, Kai. And the article was included in Zhongwai Nengyuan in 2013.SDS of cas: 1003-07-2 This article mentions the following:
Sinopec Yanshan Company’s 1200 m3/h ultra-filtration reverse osmosis sewage treatment plant met with a serious fault after nearly six years of stable operation. The RO membrane was seriously contaminated, resulting in a steep decline in output of treated water. Anal. showed that RO membrane blockage was the main cause of this breakdown, which resulted from the rapid growth of microorganism at high temperatures in summer days and the precipitation of salt due to high contents of inorganic salts in the water being treated, such as iron, manganese and aluminum. Based on field experiment results and actual production conditions, technicians proposed and took countermeasures, including adding inoxidable bactericides (isothiazolinone and DBNPA; dosing method: impact mode + continuous low-concentration dosing; dose: about 100 mg/L), adding new type of scale inhibitor (dose: about 3 mg/L), increasing the use of sodium hypochlorite (residual chlorine in concentrated water controlled between 0.5 and 0.8 mg/L), controlling the use of polyaluminum chloride between 10 and 14 mg/L, and optimizing chem. cleaning schemes. After the above measures were taken, the contaminants on the RO membrane were brought under control and the performance of the membrane recovered. More than 70% of manganese ions were removed. The operation cycle of the sewage treatment plant was extended to about 20 days from seven days and output of treated water increased by 5 × 104t per mo. In the experiment, the researchers used many compounds, for example, Isothiazol-3(2H)-one (cas: 1003-07-2SDS of cas: 1003-07-2).
Isothiazol-3(2H)-one (cas: 1003-07-2) belongs to isothiazole derivatives. Similar to other five-membered heterocycles, isothiazoles react with a wide range of electrophilic and nucleophilic reagents to form diverse products. Various penicillins and cephalosporins having an isothiazole ring system have shown considerable antibacterial efficacy against Gram-positive and Gram-negative bacteria.SDS of cas: 1003-07-2
Referemce:
Isothiazole – Wikipedia,
Isothiazole – ScienceDirect.com