[01] Nazia Shad, Northern University, Nowsehera Cantonment, KPK, Pakistan. [02] Arshad Ali, National University of Sciences and Technology, Islamabad, Pakistan. [03] Shamin Riaz, Northern University, Nowsehera Cantonment, KPK, Pakistan. [04] Adil Khan, Northern University, Nowsehera Cantonment, KPK, Pakistan. [05] Muhammad Ullah, Northern University, Nowsehera Cantonment, KPK, Pakistan. [06] Jamila Begum, Northern University, Nowsehera Cantonment, KPK, Pakistan.

For the wastewater quality analysis of the ghee mill effluent, various composite samples were collected from the local mill. The samples were collected at regular interval for a period 0f 4-6 weeks. The wastewater generated by the ghee is highly polluted in terms of releasing a high strength effluent. The mean average values COD, BOD, TSS and TDS observed was 3795mg/L, 2300mg/L, 870mg/L and 2860mg/L, respectively. The effluent is highly alkaline, with a pH of more than 9.0, and has objectionable odor and smell. Moreover, it has very high temperature, i.e., 29oC, at the point of its disposal into the receiving streams. The effluent of the ghee mill is also found to have very critical DO concentration, almost 6.5mg/L. That can adversely effects entire water ecosystem, having such high organic pollutant strength. The proposed wastewater treatment plant for the ghee mill comprises of medium screens, PST and the UASB reactor. The required dimension of the PST operating at SOR of 3.05ft3/ft2-hr was calculated to be LxWxH: 55ft x42ft x12ft. The UASB reactor of 60ft diameter and 12ft height will be able to remove more than 80% of the COD and BOD from the effluent of the ghee mill. Additionally, it will generate a biogas for the domestic requirements of 3000 persons, by an estimated biogas yield 1920m3/day. A long-term study is suggested to evaluate the overall impacts of the ghee mill on the wastewater receiving stream. Moreover, different cost-effective treatment options need to be study.

Wastewater, Ghee Mill, BOC, Pollution, Safe Disposal

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