Ozonolysis of wastewater from rubber industry

Abstract

The chemical industries currently release pollutants into air, soil, and water. For rubber industry, large amount of wastewater is produced resulting in huge energy demand for water treatment. However, there are several restriction factors for wastewater treatment i. e., contaminated oil from machinery and foul odour from organic matter caused by microbial enzymes. To overcome these problems, this research focused on wastewater treatment from rubber industry via ozonolysis. Two cases of experiments were carried out in a bubble column with capacity of 500 ml including with and without ozonolysis. Ozone concentration were maintained at 64 mg/L. Samples of 10 ml were collected every 4 h and then analyzed by GC- MS. The BOD, COD, and operating cost were investigated. The results showed that the BOD and COD decrease by 40% when ozonolysis was applied. The colour of wastewater become clear after ozonolysis. In addition, the operating cost of ozonolysis process is lower than that of without ozonolysis.

Rubber Industry Wastewater Treatment Using A Combination Of Ozonation And Modified PES-Nano ZnO Membranes

“…The addition of chemicals during the process, like ammonia (latex preservation) and sulfuric acid (skim latex coagulation), can cause the formation of various contaminants in the waste. Wastewater will harm the environmental ecosystem and human health if it is directly discharged [2]. It has been reported that the total dissolved solids (TDS) were 2240 mg/L, total suspended solids (TSS) were 3.512 mg/L, ammonia 94 mg/L, BOD 1340 mg/L and COD 2834 mg/L.…”

“…This value indicates that wastewater has high contamination and must be treated before being discharged into the environment [3].Rubber industrial wastewater treatment techniques have been carried out in several industries, but still, have limited and low efficiency. In general, the treatment of rubber industry wastewater in the Southeast region is based on biological processes, for example, lagoon systems, oxidation trenches, anaerobic digestion, and activated sludge [2]. However, this process requires a large area and still leaves an odour.…”