Textile wastewater treatment by using cement kiln dust and biochar filters

摘要

The efficacy of biochar and cement kiln dust as alternative low-cost adsorbents for the removal of organic and inorganic pollutants from textile wastewater was investigated. Studies were carried out to test the column filter to assess the effects of hydraulic loading and organic concentration on the efficiency of CKD and CKD + Biochar filters to remove heavy metals, colour and COD from textile wastewater. The results reveal that the use of hydraulic loading at 1.0 m(3) m(-2).h(-1) resulted in a similar removal efficiency of COD and colour as the hydraulic loading at 2.0 m(3)m(-2).h(-1). COD and colour removal increased with the increasing their concentrations for the used CKD + Biochar filter. Seed germination of treated water by CKD + Bio filter was higher than CKD filter. Treated effluents by the CKD + biochar filter are within the acceptable range of irrigation in salinity, pH, phosphorus and heavy metal concentrations. CKD + biochar filter are good quality treated wastewater to remove color, heavy metals and COD concentrations. Thus, CKD + Biochar filter can be used as a low-cost adsorbent and a simple technology for the removal of organic and inorganic pollutants from textile wastewater.