Abstract：
:In aquatic ecosystems, real-time water-quality (WQ) biomonitoring has become the most effective technology for monitoring toxic events by using living organisms as a biosensor. In this study, an online WQ monitoring system using sulfur oxidizing bacteria (SOB) was tested to monitor WQ changes in real-time in natural stream water. The WQ monitoring system consisted of three SOB reactors (one continuous and two semi-continuous mode reactors). The SOB system did not detect any toxicity in relatively-unpolluted, natural stream water when operated for more than six months. When diluted swine wastewater (50:1) was added to the influent of the reactors, the system detected toxic conditions in both the continuous and semi-continuous operational modes, showing 90% inhibition of SOB activity within 1 h of operation. The addition of 30 mg/L NO2--N or 2 mg/L of Cr6+ to the influents of SOB reactors resulted in the complete inhibition of the SOB activity within 1-2 h. The results demonstrated the successful application of an SOB bioassay as an online toxicity monitoring system for detecting pollutants from stream or river waters.
journal_name
Chemospherejournal_title
Chemosphereauthors
Hassan SHA,Gurung A,Kang WC,Shin BS,Rahimnejad M,Jeon BH,Kim JR,Oh SEdoi
10.1016/j.chemosphere.2019.01.089subject
Has Abstractpub_date
2019-05-01 00:00:00pages
58-63eissn
0045-6535issn
1879-1298pii
S0045-6535(19)30095-5journal_volume
223pub_type
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