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Impact of Shrimp Processing Industries on the Chemical Properties of Soils of Rupsha Upazila, Khulna, Bangladesh

Samiul Ahsan
Soil Science Discipline, Khulna University, Khulna 9208, Bangladesh

Md. Tareq Bin Salam
Soil Science Discipline, Khulna University, Khulna 9208, Bangladesh

Shaikh Motasim Billah*
Soil Science Discipline, Khulna University, Khulna 9208, Bangladesh

Abstract/ Executive Summary:

A Comparative study was carried out in different shrimp processing industries at Rupsha Upazila under Khulna district during 2010. In the experiment, some soils which are collected from nearby fields of the industries and the agricultural field that approximately 100 meters away from the industries were determined to sketch out the nutrient dynamics of the experimental area. The nutrient contents of water were analyzed for measuring pH, EC, Salt percentage and some major ionic concentrations. The pH was more than 8.0 in the polluted soil which reflected alkaline in nature. The EC values was also higher (7.7 dSm-1 ) in polluted soil than in controlled soil (5.54 dSm-1 ). Other values of major ionic concentrations were differing from controlled soils to polluted soils except Ca, Mg. Among the five industries, Lockpur fish processing industry showed the most effectively increased the values and concentrations of different chemical parameters. High sodium (alkali) content with medium salinity hazard is the major problem in the investigated area. So, appropriate sustainable management technologies need to be incorporated to control pH and salinity hazard

Keywords: Soil quality, Effluents, Shrimp processing industries, Crop growth, Salinity

Location: Rupsha Upazila under Khulna

Start Date: 00-00-2010

End Date:

Program Area: Chemical Analysis

Commodity: Contamination of soil, Shrimp

Objectives:

Investigation has been conducted to assess the intensity of soil pollution and the potential impacts of effluents & wastes on soil surrounding some Shrimp processing industries (Modern sea food, Sabuj fish., Khulna fish, Lockpur fish processing Ltd. and Bright sea food) of Rupsa Upazila under Khulna district. Consequently, a research work has been made at the Discipline of Soil Science, Khulna University, Khulna with the following objective: To estimate the level of pollution in terms of soil chemical parameters of the study area as compared with unpolluted (control) soil.

Methodology:

Study Area: An investigation has been conducted to assess the quality of water where effluents discharged from shrimp processing industries for irrigation use at Rupsha Upazilla under Khulna district with 22°45' and 22°52' north latitude and 89°33' and 89°41' east longitudes (Map-01). 'Rupsha' River flows beside the Upazilla which is evolved 5.5 sq km (Thana Nirdeshika, SRDT, 1989). In Rupsha Upazilla the soil type is flood plain to little bit non-flood plain. It consists of organic soil and tidal plain. In spite of having a lot of rivers and cannels it depends on monsoon rainfall for crop production. So, further investigation and research workshould be been essential for proper use of nutrients in soils and sustainable agriculture.

Sampling and Analysis: The soil sampling sites consisted of Rupsa Upazila under the district of Khulna. Fifteen soil samples were randomly collected to cover most of the investigated area during 11 October, 2009. Composite method has been applied during sampling soil samples. Samples were collected at optimum time associated with favorable environmental condition. Three soil samples collected from five of each selected industries. Among these three soil samples, two were collected from areas where the washing materials were discharged from the industry and another one is collected from nearby cultivated field which was approximately 100 meters away from the industries. Samples were contained in polythin bags tied, labeled and preserved for laboratory analysis. The sites were near Modern Sea Food, Sabuj Fish, Khulna Fish, Lockpur Fish Processing Ltd, Bright Sea Food where the effluents of shrimp processing industries were being discharged.

The major chemical constituents of water and its quality factors were considered for analyses by following methodology. The methods and procedure followed for the determination are as follows: The pH value of soil samples were measured by using pH meter (Jenway pH meter) as described by Tan (1996). Electrical conductivity (EC) of soil was estimated by EC meter (Jenway EC meter) as described by Ghosh, et al. (1983). Salt (%) = 0.064 x EC (dS m"1 or mS cm"1 or mmhos cm"1 ) (Jackson, 1973). Calcium and calcium plus Magnesium were determined by titri-metric method as described by Jackson (1973). Potassium and sodium contents in soil samples were determined separately by flame emission spectrophotometer (Jenway, Model: PEP-7) using potassium and sodium filters, respectively as outlined by Jackson (1973). Chloride (CT) was determined by the titri-metric method as described by Jackson (1973). Carbonate and bicarbonate contents of the soil samples were determined by titrimetric method as described by Jackson (1973). The data were statistically analyzed by using MINITAB 13.0 and The statistical analyses of the analytical results obtained from soil samples were performed as described by Zaman, et. al. (1982).

Source of Information: Khulna University Studies Volume 11 (1&2) and 12 (1&2) : December 2013

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

An investigation was carried out to test the impact of shrimp industries of Rupsha Upazilla under Khulana district on chemical properties of nearby soils that are subject to be affected by the discharged effluents from these industries. The findings of the investigation are showed that Soil sample analyses showed that affected soils contains higher pH and EC values, and higher concentrations of Na, K, Ca, Mg, CO3, Cl and HCCV than those values and concentrations of unaffected soils. Results were statistically significant except for Ca, Mg and HCCV. It was showed from the result of the study that Lockpur fish processing unit most effectively increased the values and concentrations of different chemical parameters. However excess Na in affected soils may render dispersion and disrupt structure development and hence affect many other qualitative values of these soils if the conditions prevail for a long time. So, immediate appropriate sustainable technology should be adopted for the treatment of these soils in the study area.

Knowledge Management: Journal