Improvement of industrial phenol polluted surface runoff treatment system

Timber manufacturing industry is one of the leading industries in Karelia possessing huge reserves of wood resources. Industrial manufacture of wood materials involves the use of phenolic resins. Imperfection of technological production and transportation of raw materials lead to water pollution by increased amounts of harmful chemicals. Analysis of the existing manufacturing technologies and drainage scheme improvement can reduce negative effects on water reserves. Improvement of the secondary treatment system involves introduction of the combined coagulation system and employment of the slow filtering device. An example of calculating the amount of harm caused to the Lake Onega is provided. The cost of construction for additional cleaning makes up 25 % of the total amount of charged penalties presented by environmental services for the discharge of inadequately treated sewage.