Use of Advanced (i.e., Membrane) Technology for the Waste Water Treatment of Coke Ovens

Forfattere

  • vagish m Department of Chemical Engineering, Bapuji Institute of Engineering &Technology, Davangere
  • Dr.K.L. shivabasappa Department of Chemical Engineering, Siddaganga Institute of Technology, Tumkur Visvesvaraya Technological University, Belgaum

Nøgleord:

Coke dry quenching (CDQ), Ultrafiltration, Membrane bio reactor, Reverse osmosis,

Resumé

 Coke plants produce gas, coke for metallurgical purposes and also supply the raw materials for manufacture of dyes, drugs and high explosives. Naturally found coal is converted into coke in coke ovens. A large quantity of water is used for quenching hot coke and for washing gas. After quenching the waste water contains high-suspended solids, high biochemical oxygen demand (BOD) (600–1300 mg/L), chemical oxygen demand (COD) (1500–3000mg/L), phenols(500–650 mg/L), ammonia(150–250 mg/L),cyanide(5–10 mg/L),suspended solids(100–350 mg/L)and other toxic substances, which cause serious water pollution. So these effluents are treated from biological oxidation and dephenolisation plant and may be recycled and again used for quenching hot coke. But because of the upcoming project like coke dry quenching (CDQ), where the treated water cannot be used for quenching, it has to be discharged to environmental bodies. Secondary treated waste water from coke ovens contains very low organics but high conductivity (2700–3000 µs/cm), which is attributed to high concentration of many dissolved monovalent and divalent ions. Since they cannot be removed by conventional treatment methods, a commercial ultrafiltration (UF) and reverse osmosis (RO) membrane can be used for coke ovens wastewater reuse and discharge. By using of membrane technology and biological treatment the maximum treatment of waste water can be achieved. This paper presents the membrane technology used in waste water reclaimed characteristics and some results of reduction in various waste water parameters. Keywords:  Coke dry quenching (CDQ), Ultrafiltration, Membrane bio reactor, Reverse osmosis, 

Forfatterbiografier

  • vagish m, Department of Chemical Engineering, Bapuji Institute of Engineering &Technology, Davangere
    department of chemical engineering,Siddaganga institute of technology,Tumkur
  • Dr.K.L. shivabasappa, Department of Chemical Engineering, Siddaganga Institute of Technology, Tumkur Visvesvaraya Technological University, Belgaum
    professor and head,Department of chemical engineering,Siddaganga institute of technology,Tumkur

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Publiceret

2012-05-10

Nummer

Årg. 2 Nr. 1 (2012)

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