The innovative approach of reducing the tannery pollutant load involves (a) the segregation of the various streams (beam house waste stream and tanyard waste stream); (b) first stage beam house waste pretreatment: recycle of carbon dioxide in the stack flue gas for removing the protein, BOD, and COD from the beam waste stream, and recovery and…[Read more]

Tsao, Hung-ping (2022). Evolutionary Mathematics and Science for Some Observations of the Terminal Value Distribution in the Process of Successively Summing up all Prime Factors of a Given Natural Number. In: “Evolutionary Progress in Science, Technology, Engineering, Arts, and Mathematics (STEAM)”, Wang, Lawrence K. and Tsao, Hung-ping (editors).…[Read more]

It is known that each natural number greater than 1 can be expressed as a unique product of prime numbers, namely the prime factorization. For example, 84=2×2×3×7. By summing up all prime factors of 84, we obtain 2+2+3+7=14. Since 14=2×7, we further sum up all prime factors of 14 to obtain 2+7=9. Since 9=3×3 and 3+3=6, we can continue the same…[Read more]

Wang, LK and Wang, MHS (2022). Oil and grease determination, solvent hazards and waste disposal when using trichloromethane (chloroform) for extraction; In: “Evolutionary Progress in Science, Technology, Engineering, Arts and Mathematics (STEAM)”, Wang, LK and Tsao, HP (eds.), 4 (6D), STEAM-VOL4-NUM6D-JUNE2022. ISBN 978-0-9890870-3-2. 57 pag…[Read more]

A spectrophotometric procedure has been developed for determination of hydrocarbons, vegetable oils, animal fats, waxes, soaps, greases and related oily organic matter in aqueous phase. The water sample is acidified to a low pH (less than or equal to 2) and extracted with trichloroethane (methyl chloroform). Under controlled conditions, the oil…[Read more]

A spectrophotometric procedure has been developed for determination of oil and grease in aqueous phase. The water sample is acidified to a low pH (less than or equal to 2) and extracted with 1,1,2-trichloro-l,2,2-trifluoroethane (Freon 113, or CFC 113). Under controlled conditions, the oil and grease are extractable into a selected organic…[Read more]

A spectrophotometric procedure has been developed for determination of oil and grease in aqueous phase. The water sample is acidified to a low pH (less than or equal to 2) and extracted with 1,1,2-trichloro-l,2,2-trifluoroethane (Freon 113, or CFC 113). Under controlled conditions, the oil and grease are extractable into a selected organic…[Read more]

Tsao, Hung-ping (2022). Evolutionary mathematics and science for On the Terminal Value Distribution in the Process of Successively Summing up all Prime Factors of a Given Natural Number. In: “Evolutionary Progress in Science, Technology, Engineering, Arts, and Mathematics (STEAM)”, Wang, Lawrence K. and Tsao, Hung-ping (editors). Volume 4, Number…[Read more]

Tsao, Hung-ping (2022). Evolutionary mathematics and science for On the Terminal Value Distribution in the Process of Successively Summing up all Prime Factors of a Given Natural Number. In: “Evolutionary Progress in Science, Technology, Engineering, Arts, and Mathematics (STEAM)”, Wang, Lawrence K. and Tsao, Hung-ping (editors). Volume 4, Number…[Read more]

Wang, LK and Wang, MHS (2022). Dissolved oxygen model, vapor pressure, evaporation lagoon, and flotation post aeration; In: “Evolutionary Progress in Science, Technology, Engineering, Arts and Mathematics (STEAM)”, Wang, LK and Tsao, HP (eds.), 4 (7H), STEAM-VOL4-NUM7H-JULY2022. ISBN 978-0-9890870-3-2. 55 pages. July 2022, Lenox Institute Pre…[Read more]

Wang, LK and Wang, MHS (2022). Dissolved oxygen model, vapor pressure, evaporation lagoon, and flotation post aeration; In: “Evolutionary Progress in Science, Technology, Engineering, Arts and Mathematics (STEAM)”, Wang, LK and Tsao, HP (eds.), 4 (7H), STEAM-VOL4-NUM7H-JULY2022. ISBN 978-0-9890870-3-2. 55 pages. July 2022, Lenox Institute Pre…[Read more]

Wang, LK and Wang, MHS (2022). Hazardous wastewater treatment in petroleum refining industry using best available flotation and filtration technologies. In: “Evolutionary Progress in Science, Technology, Engineering, Arts and Mathematics (STEAM)”, Wang, LK and Tsao, HP (eds.), 4 (7G), STEAM-VOL4-NUM7G-JULY2022. ISBN 978-0-9890870-3-2. pp.…[Read more]