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 Title |
: Growth of Photosynthetic Bacteria in Wastewater from a Concentrated Latex Processing Factory |
 Author |
: Wanna CHOORIT |
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Co-authors |
: Piyarat THANAKOSET, Jarin THONGPRADISTHA, Ken SASAKI and Napavarn NOPARATNARAPORN |
 School |
: Walailak University |
 Department |
: |
 Source |
: Annual Research Abstracts 2002-2003 |
 Grant |
: Royal Golden Jubilee Ph.D. Program, The Thailand Research Fund (TRF);Graduate School, Prince of Songkla University. |
 Knowledge Bank Category |
: Agriculture |
 Viewes |
: 552 |
 Abstract |
: after centrifugation of rubber latex. The concentrated latex containing 60% (w/v) rubber, is used as raw material to produce rubber gloves. Chemicals normally used in the process for rubber glove production include sulfur, ZnO, HNO3 and CaCl2. The BOD and COD contents of the wastewater are usually from 230-1, 430 and 1,500-3,164 mg/l, respectively. To date the wastewater from concentrated latex processing factories is treated by using stabilization ponds, which accounts for more than 70% of concentrated latex factory land use. The search for microorganisms capable of growing in the wastewater from concentrated latex factories is therefore justified. Moreover, redness in the treatment ponds led us to investigate if photosynthetic bacteria were the predominant bacteria. This work was designed to identify the bacteria and study the efficacy of the isolated strains in reducing the organic content of the concentrated latex processing effluent. The purple non-sulfur photosynthetic bacteria ten strains, isolated fr wastewater produced by a concentrated latex processing factory, were cultivated in a wastewater medium without supplementation. After 40 h cultivation, strains SS51 and SY40, decreased the COD content of the wastewater by 34%. Optimal culture conditions of mixed-cultivation between SS51 and SY40 were pH of 6.5 and temperature of 40oC, and with a SS51:SY40 ratio of 2:1 (v/v). Both strains were identified as Rubrivivax gelatinosus. |
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