“…Acidic pH has a negative impact on biofilm growth, the same is seen when at pH 6-6.8, 2,15,35 and the same is considered to reduce voltage further if substrate is more acidic [Colour figure can be viewed at wileyonlinelibrary.com] FIGURE 10 Voltage generated at another similar resistance (of 200 Ω), 29 the comparison shows higher voltage generation at a difference of 50 Ω, this is directly related to COD removal efficiency, this shows higher the external load more faster is the COD removal rate for water treatment [Colour figure can be viewed at wileyonlinelibrary.com] not consistent with wastewater having acidic pH, and system performance is usually stable at pH over seven, studies with domestic wastewater and acetate has confirmed the same. However, taking these interactions into consideration and the experimental justification of systematic MFC performance, one can speculate to explain the evolution of biofilm, like attachment, growth, and decay.…”