Application of solid hide waste as an adsorbent for the treatment of industrial wastewater

The adsorption process is an effective method for wastewater treatment for the removal of various types of pollutants. Numerous agro-industrial and domestic waste products have been used to create affordable adsorbents. Waste materials can be used as inexpensive adsorbents, which is appealing because it lowers the cost of waste disposal and helps to protect the environment. Therefore, this research aims to valorize the solid wastes produced during the tanning process. The accumulation of solid waste in tanneries is an environmental problem in many countries. This problem can be alleviated by optimizing the use of these pollutants. Chrome and white shavings were used (as adsorbent) for the treatment of industrial wastewater. The wastewater was collected from the chemicals and resin production factory. White shavings were pretreated before use. The functional groups located on the surface of the pretreated white shavings were investigated using the Fourier-transform infrared spectroscopy technique. The treated white shavings were ground to suitable grain size (0.5-1 mm). The treatment scheme consisted of settling (1 h), sand filtration (0.5-1.0 mm), and adsorption with the pretreated ground chrome and white shaving used for the treatment of wastewater. The influent chemical oxygen demand and biochemical oxygen demand were reduced from 8,025 to 890 and from 2,808.75 to 489.5 mg/L. The effluent met all national regulatory standards for sewer system discharge. Consequently, chrome and white shaving could be used as adsorbents for the treatment of industrial wastewater. These materials could be used as preferable adsorbents for the treatment of wastewater several times.

Automated summary

The adsorption process is an effective method for treating wastewater, and the use of waste materials as adsorbents can reduce costs and protect the environment. This research focuses on using solid waste from tanneries as adsorbents for industrial wastewater treatment. The study successfully reduced the chemical and biochemical oxygen demand of the wastewater to meet regulatory standards.