Evaluation of gray water treatment with pilot filter for irrigation purposes

Abstract

Warming and water scarcity are issues that attract global interest. In particular, it is vital to reduce the demands on supplies of fresh water. This study investigates the use of gray sewage from domestic and restaurant settings for agricultural purposes, following treatment and purification using simple and available techniques. The reduction of agricultural fertilizer use is a secondary economic purpose: ideally, a suitable economic target for society can be achieved. In this study, purification was achieved by filtering gray water using system of sand filtration (sand and gravel) with the use of other materials to increase the effectiveness of treatment. These other materials included coal, active carbon, bentonite, pomegranate peel, and chlorine. Each substance was used individually and chemical tests were conducted on the gray water. The results of the chemical tests were pleasing and can be summarized as: PH 7.1-8.7; EC 1298-2590mg/l; TDS 415-965mg/l; turbidity 45-108); temperature 12.3-24.6 deg. Ċ; Ca.+2 59.12-160.32mg/l;, Mg.+2 7.32-79.79mg/l; Na.+1 141.6-518.6mg/l; SAR 5.4-16.6; K 9.6-38.2mg/l; SO4 302-854mg/l; CaCo. 104 -169mg/l; NH4-N 16-28.627mg/l; T-P 0.639-10mg/l; BOD5 17-68mg/l; COD 117-1300mg/l. Total coliforms were 10-280000 cfu/100 ml.