Feasibility of applying nonthermal plasma for dairy effluent treatment and optimization of process parameters

Abstract

Dairy industry effluent will pollute the environment if not properly treated. In the present work, the feasibility of nonthermal plasma (NTP) for the treatment of dairy industry effluent is assessed. The effect of energy yield and plasma intensity on reduction of Chemical Oxygen Demand (COD) removal is investigated. Box–Behnken design (BBD) is employed to optimize the operating parameters such as initial pH (5–9), reaction time (4–8 h), effluent flow rate (10–90 ml/min) and applied voltage (20–30 kV) where COD and energy yield are taken as responses. The optimum condition for COD removal and energy yield is same with a pH of 9, effluent flow rate of 10 ml/min and applied voltage of 30 kVp‐p, whereas reaction time differs as 8 and 4 h, respectively. COD reduction of 52% indicates that NTP process is a promising technology for dairy effluent treatment.

Experimental Analysis And Parameter Optimization On The Reduction of NOx From Diesel Engine Using RSM And ANN Model

“…The schematic experimental setup for NOx reduction is illustrated in Fig. 2 and its specifications are mentioned in the previous study (Suresh et al 2021b). This design is comprised of four main elements: gas supply, DBD reactor, power supply module and gas-sensing apparatus.…”

“…The most commenly used metrics for measuring non-thermal plasma energy consumption are power density and energy efficiency, which are determined using the following equations (Eq 3-4) (Mansouri et al 2020, Suresh et al 2021b.…”

“…Removal of nitrogen oxides using Nonthermal Plasma (NTP) has been put forward as a viable option (Takaki et al 2004). In the NTP systems, toxins are easy to remove, there are no organic contaminants and maintenance costs, and primary processing is at ambient pressure (Suresh et al 2021a, Suresh et al 2021b.…”