Abstract
The present paper deals with the organic loadings of grey water with its average and maximum flow rate on an hourly and daily basis generated from the residential colony of G.B. Pant University of Agriculture and Technology, Pantnagar, India. For reliable quantification, the study was conducted at the interval of 1 h for eight consecutive days in each season during the year 2012 to 2013. Following parameters viz biochemical oxygen demand (BOD), chemical oxygen demand (COD), nitrogen, phosphorus, and potassium analyses were used to calculate grey water pollutant load. The observed annual average organic pollutant loading in terms of BOD was found to be 29.44 kg/day with maximum load in the summer season. However, this organic loading at maximum flow rate basis (in peak hours) was varied seasonally from 55.3, 52.0, and 83.3 kg/day, respectively, during the monsoon, winter, and summer seasons. The grey water discharge flow rate reveals the need of a treatment system compatible with fluctuating pollutant loads. The bioefficacy of phytoremediation-based technology was assessed and found to be maximum in the summer season. Hence, it is found to be the best suited green alternative for combating the fluctuating pollutant load.
Highlights
These days' technology involved in wastewater treatment uses innovative, efficient, and advanced methods
The maximum loading due to average and maximum flow rate was recorded to be significantly higher in the summer season, i.e., 33.31 and 83.34 kg/ day, respectively
The results concluded that the pollutant loading explicitly varied along with the magnitude of grey water
Summary
These days' technology involved in wastewater treatment uses innovative, efficient, and advanced methods. These need to be economically viable, especially in the rural part of India in order to support wastewater treatment and reuses. Inadequate freshwater supply, and inappropriate management leads to more pollutant load of water. Vis-à-vis, the green technology based on the short rotation-plantation fertigation system worked like a panacea. For this purpose, the quantification of generated wastewater and its pollutant load is a prerequisite asset. The drivers of wastewater generation from the nonpoint sources of pollution are multiple, and grey
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