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MATHEMATICAL MODEL OF RECYCLING COOLING SYSTEMS »« RESEARCH OF ACTIVATED SLUDGE ADAPTATION TO ANAEROBIC-AEROBIC CONDITIONS OF BIOREACTORS FOR WASTEWATER TREATMENT

IMPACT OF THE CARBAMIDE ON BIOLOGICAL REMOVAL OF PHENOLS FROM SEWAGE OF THE COKE-CHEMICAL ENTERPRISE

A.V. Ivanchenko, O. A. Dupenko, N. D. Voloshin

Dneprodzerzhinsk state technical university, Dneprodzerzhinsk

e-mail: ivanche .anna@yandex.ru 

The characteristic of sewage formed at the coke plant is given. Relevance of improvement of technology for biological treatment of industrial effluents from phenols is shown. The object of definition of possibility of use of a carbamide in quality of the additive accelerating biooxidation of phenols of the increased concentration in sewage of the coke-chemical enterprises is set. Installation of bioextraction of phenols by microorganisms of active silt is created. In work photometric and titrimetrichesky methods of definition of the content of phenols and ammonia are used. As a result of researches influence of an additive of a carbamide on biooxidation of phenols in sewage of the coke-chemical enterprise, namely, dependence between the initial content of phenols, a carbamide dose, time and their final content in sewage is established. It is shown that urea as an additive influences only bioextraction of flying ammonia from sewage, but not connected. It is established that addition of a carbamide in sewage of the coke-chemical enterprises accelerates extent of biological cleaning of phenols by 1,9-3,5 times in comparison with test without use of this substance. The optimum dose of urea for application commercially at which additive there is a removal of phenols to maximum-permissible requirements is picked experimentally up, and it makes 0,5 g/dm3.

Key words: phenol, carbamide, biooxidation, sewage, ammonia, microorganisms.

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07.04.2016 at 8:10 pm