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Location Assessment of wastewater treatment plant efficiency in Dashen brewery and characterization of pollution in Gondar edible oil factory, Ethiopia

  • Student: Azanaw Embialle
  • Institution: Bahir Dar University
  • Degree: M.Sc.
  • Posted on: August 02, 2012

Thesis Abstract

Assessment of waste water treatment efficiency is done for Dashen Brewery and Gondar Edible Oil Factory waste water treatment plant whose main objective is reduction of: Chemical Oxygen Demand (COD) / Biological Oxygen Demand (BOD), grease and oil removal, minerals removal, sludge dewatering, nitrification and denitrification. Assessment has been conducted for the following parameters: physical (temperature, turbidity), chemical (PH, conductivity, total suspended solid, dissolved oxygen, biological oxygen demand, total phosphorus, total nitrogen) and biological (micro flora).The concentration of the biochemical oxygen demand (BOD5) was on the average ranged from 50 to 832.08 mg/l. The amount of total suspended solids (TSS) was on average ranged from 25.5-1400.55 mg/l and that of total dissolved solids (TDS) was on the average 162.55-832.08mg/l and turbidity was on average calculated to be from 25.57-1400.55 mg/l, conductivity on the average ranged from 325.11 to 1664.17mg/l. The concentration of total nitrogen was from 0.645-2.25 mg/l,) and total phosphorus concentration from 3.74-8.67 mg/l. The temperature and pH average values as measured from the site are respectively, from 21.98 to 25.51 0C and from 7.20 to 7.66 to the Dashen brewery.The concentration of the biochemical oxygen demand (BOD5) was on the average ranged from 54.6 to 257.4 mg/l. The amount of total suspended solids (TSS) was on average ranged from 23.77-34.87 mg/l and that of total dissolved solids (TDS) was on the average 77.125-416.25 mg/l and turbidity was on average calculated to be from 23.77-34.87 mg/l, conductivity on the average ranged from 154.25 to 832.5 mg/l for Gondar edible oil.This research project has finally come up with sound recommendations for the processing plants and other stakeholders including policy makers.