Assess the wastewater treatment efficiency of the rice paper craft village with activated sludge supplemented with probiotics

Abstract

This study was carried out to assess the wastewater treatment efficiency of rice paper craft villages with activated sludge supplemented with probiotics. With probiotic BHT preparation (including strains: Bacillus thuringiensis, Bacillus cereus, Bacillus sp., Pseudomonas sp., Saccharomyces cerevisiae), the density of microorganisms of 108 CFU/g, selecting the appropriate retention time of 9 days for the highest treatment efficiency, in which COD treatment reached 81%, BOD5 treatment reached 82%, TSS treatment reached 55.7% and met QCVN 40:2011/BTNMT (column B). When adding BHT and Bio-EM probiotics to activated sludge to treat rice paper processing wastewater with a retention time of 16 hours, the initial COD value of 500 mg/l, COD treatment efficiency of rice paper processing wastewater by activated sludge, activated sludge supplemented with BHT, and activated sludge supplemented Bio-EM was 93.3, 93.5, and 94.4%, respectively and suitable for rice paper processing influent with COD less than 500 mg/l and the frequency of probiotics addition was once every 15 days with a microorganism density of 108 CFU/g.