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Chloromethyl-methylisothiazolone (CMIT/MIT) biocide is used for microbial control in industrial water treatment applications. It is effective versus various types of bacteria, algae and fungi. This paper will provide results of planktonic and biofilm efficacy studies with CMIT/MIT biocide versus various strains of Desulfovibrio.
During the testing of circular grit chambers in a wastewater treatment plant under construction, serious leaking problems were discovered prior to project completion. After meetings with the Owner, Design and Construction engineering firms, painting contractor and coatings manufacturer, the decision was made to apply 80 mils of pure polyurea to various concrete surfaces. This presentation, through the use of photo images taken during remediation, describes the nature of the problem and how it was solved.
Each element & molecule has its own typical natural oscillation. The aim is to influence the original oscillation of the element through in such a way that ultimately the physical properties of the element or of the molecule are modified in the water. The results are rust molecules disintegrate in an unstable form and are washed out.
Recycled water quality must be evaluated to determine its potential impact on the equipment the cooling water contacts. This paper identifies the impact of various recycled water ingredients that could either be harmful or beneficial to the equipment the cooling water contacts. Case histories. Guidelines.
Acceptable “industry standard” for dissolving a silicate deposit is hydrofluoric acid. Here, we introduce a safer, more environmentallyfriendly el method for dissolving silicate scales and present a case study for its application in industry.
Laboratory exposure testing of carbon steel to water from different regions of the United States, with varying chemistries and chloride content. The results of chemical analyses conducted in the laboratory, including elemental analysis by SEM/EDS and analysis by x-ray diffraction are correlated to water chemistry.
This study is focused on the evaluation of polyepoxysuccinic acid (PESA), 2-phosphonobutane 1,2,4-tricarboxyllic acid (PBTC), and PESA/PBTC blends for calcium sulfate dihydrate (gypsum) and calcium carbonate scale inhibition for aqueous systems.
Indirect assessment techniques (special over-the-line potential and soil corrosivity surveys) were applied on an electrically discontinuous effluent sewer land outfall. Critical areas were excavated and direct assessment performed. Mitigation methods were recommended.
This paper explores four specific modes of failure. 1. The dezincification of brass. 2. Problems that plague galvanized pipe. 3. Graphitization of cast iron. 4. Pitting corrosion of stainless steel due to effects of manganese.
This paper looks at one major water and wastewater municipality with an established system for external corrosion control. Details of their systematic approach, how it developed and is applied, are included.