The chicken farmer's struggle to reduce waste odor and meet CONAMA (Conselho Nacional do Meio Ambiente) discharge permit regulations in Brazil has made a giant leap forward with the assistance of United States manufactured Alken Clear-Flo® 7000, a dry (bran based) blend of seven specially adapted nonpathogenic, natural strains of bacteria designed to liquefy, metabolize and deodorize waste.
The recommended dosage rate for Alken Clear-Flo® 7000 is 1 lb. per 1500 poultry, which is activated in water and can be applied either directly to the lagoons or by spraying it on the dropping boards, which carries the treatment, along with the waste, to the lagoons. The increased retention time, created by applying the product to the dropping boards, allows maximum product efficiency and deodorizes the chicken house, along with the lagoons.
After treatment On July 24, 1997, Ing. Eduardo (Industrial Maintenance) and Sr. Eder (Quality Controller) collected two water samples from the influent and effluent waste treatment system for post-treatment analysis by Saneamento de Goiás S.A. Evaluating the reduction in BOD5* (biological oxygen demand) was deemed the best test of the ability of the system to remove organic matter. The result of testing these samples was a reduction from 833.3 mg/L influent to 52.5 mg/L system effluent (a 93.7% total system reduction in BOD5)! A test project at the four in-line lagoons belonging to the Só Frango Produc Alimenticios Ltda. in Brazil was begun to verify the efficiency of the Alken® system of chicken farm waste treatment for future projects. Alken-Murray's Brazilian representative, Sr. André Nogueira of PTA Tecnologia Internacional, took the accompanying "before-and-after treatment" photographs. To verify this test, five samples were drawn from each of the treated lagoons, along with five samples from the influent over a fifteen hour period, on July 24th. The levels from each lagoon were averaged and compared by the Àtomo Quimica Ltds (Conágua) independent testing laboratories. The testing results were as follows:
01. Influent (untreated system) - BOD5: 1,166 mg/L
02. Lagoon 01 - BOD5: 720 mg/L (38.2% reduction from influent)
03. Lagoon 02 - BOD5: 382.5 mg/L (46.9% reduction from lagoon 01)
04. Lagoon 03 - BOD5: 187.5 mg/L (51% reduction from lagoon 02)
05. Lagoon 04 - final BOD5 from treated system: 150.0 mg/L (20% reduced from lagoon 03)
TOTAL System Improvement: 87% based upon reduction in levels of BOD5
The results of COD* (chemical oxygen demand) testing in the same lagoon system showed a reduction from 7,128.0 mg/L in the untreated influent to 697.9 mg/L in the final effluent, which is over 90% reduction in COD.
These exciting results, which left the discharge with a dissolved oxygen of 7 mg/L and a pH of 7.33, permitted Só Frango Produc Alimenticios Ltda. to discharge their post-treatment effluent to the river without incurring fines for polluting the environment. Although the retention time of 4 days was not changed, the quality of the effluent has been remarkably improved.
* Contact your Alken-Murray representative for an explanation of the testing procedure used for a 5 day BOD test vs. the COD test and its application in improving the environment. Before After