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Wastewater Use in Agriculture- a Case Study in Periurban Area of Mymensingh District

M.P. lslam
Lecturer
Depertment of Farm Power and Machinery, BAU, Mymensingh-2202, Bangladesh

M.D, Hussain
Professor
Depertment of Farm Power and Machinery, BAU, Mymensingh-2202, Bangladesh

M. Alam

Abstract/ Executive Summary:

Wastewater (ww) is important for the farmers of developing countries for the production of field crops and short rotation plantations (SRPS) during the shortage of irrigation water. Wastewater is rich in nitrogen, phosphorus, zinc and other heavy metals. ln principle ww can be easily diverted to farmers filed with a very low cost. Other important matter is the appropriate selection of SRPS for the supply of firewood to farmers and the SRP will reduce the deforestation rate in the country by supplying biomass for firewood. Recently the authors conducted field works in some municipalities to know the peoples interest for ww and SRPS use in Bangladesh. This study reveals that during the period from November to May, There is an acute shortage of water and ww will be the only source of water to use in crop cultivation and SRPs production in Bangladesh.

Keywords: Wastewater discharge, Short rotation plantation, Waterhyacinth, Nutrients

Location: Mymensingh Municipal area

Start Date:

End Date:

Program Area: Crop-Soil-Water Management

Commodity: Water management

Objectives:

To study the wastewater related parameters.

Methodology:

pH may be defined as the negative value of the logarithm of the hydrogen ion concentration (strictly speaking hydronium ion concentration.The normal pH range for irrigation water is from 6.5 to 8.4; pH values outside this range are a good warning that the water is abnormal in quality. Normally, pH is a routine measurement in irrigation water quality assessment. A digital pH meter (Milwaukee Smart pH system SM100, accuracy at (25"C) range r0.2 pH) uses an etectrode to measure the pH of a solution. Before taking a pH measurement, the meter must be "calibrated". Electric Conductivity is defined as the ability of a substance to conduct an electric current and it is the reciprocal of electrical resistivity. The unit of measurement commonly used is the Siemens/cm (S/cm), microsiemens/cm (ps/cm), or milliSiemens (ms/cm). ln aqueous solutions conductivity is directly proportional to the concentration of dissolved solids, therefore the higher the concentrations of solids, the greater the conductivity. TDS is a common measurement of freshwater. When TDS is determined by summing the results of separate analyses for all major ions, it is analogous to salinity. When TDS is measured gravimetrically (by weight), it can be greater or less than salinity, depending on whether loss of bicarbonate (H₂CO₃) in the gravimetric analysis is more than offset by the presence and, consequently, measurement of dissolved organic carbon. A gravimetric measurement of TDS in water in an alkaline media would probably indicate lower TDS than if TDS were measured by summation or salinity because not enough organic matter would be present in the water to make up the H₂CO₃ weight loss. DiST 2 (Hl 98302, range 10.00 ppl (g/L)) was used in the field experiment. The concentration of NH₄, NO₂^-, NO₃^- and PO₄⁺ are measured semi-quantitatively by visual comparjson of the reaction zone of the strip with the fields of a colour scale. The sample material may be wastewater, soils, fe(ilizers and food. A wide range of colorimelric and titrimehic rapid testes and ion-specific Merckoquant@ test strips are available for the determination of many other ions and compounds.

Source of Information: J. Agric. Mach. Bioresour. Eng.4(1&2),2006: 1-5, ISSN 1993-4041

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Wastewater can be treated using fast growing short rotation plantations, such as rain tree, ber, mortha, bamboo, moringha, jatropha carcas elc. Wastewater is rich in nutrients and can be used as irrigation water Wastewater use policy must be formulated and practiced as per state of the art of use and application of wastewater and SRPs in the country.

Knowledge Management: Journal