Introduction Effluents from leather industries contain high organic and inorganic loadings, and dissolved and suspended solids1,2. Apart from chemicals used in tanning process, other chemicals released from skin and hide contribute chemical oxygen demand (COD, 1000-4000 mg/l), biological oxygen demand (BOD, 300-800 mg/l) and total organic carbon (TOC, 350-1500 mg/l) of wastewater. Syntans (synt...

The major purpose of this study was to develop a simple procedure to describe the kinetics of biodegradation of natural organic matter (NOM) in drinking water and to use this procedure to evaluate changes in the concentration of biodegradable organic matter during ozonation and biotreatment. The proposed approach quantitatively describes the formation and removal of rapidly and slowly biodegrad...

Degradation of phenol and polycyclic aromatics hydrocarbons (PAHs) presented in artificially contaminated and/or real soil collected from a contaminated site of former coke plant by free cells of Candida tropicalis was studied in batch cultures and at the ratio of liquid culture media : soil = 2 : 1 with the initial concentration of phenol 560 mg kg -1 and 152 mg kg -1 (real soil), respectively...

Biofiltration of waste gases is cost-effective and environment-friendly compared to the conventional techniques for treating large flow rates of gas streams with low concentrations of pollutants. Pulp and paper industry off-gases usually contain reduced sulfur compounds, such as hydrogen sulfide and a wide range of volatile organic compounds (VOCs), e.g., methanol. It is desirable to eliminate ...

Air biofiltration is a promising technology for control of air emissions of biodegradable volatile organic compounds (VOCs). In conjunction with vacuum extraction of soils or air stripping of ground water, it can be used to mineralize VOCs removed from contaminated soil or groundwater. The literature (1) describes three major biological systems for treating contaminated air bioscrubbers, biotri...

Three bacteria from a tobacco industry effluent and one from a sewage sample were isolated on a medium comprising of 1% tobacco powder as sole source of nutrients. Bacteria isolated from the industrial waste water were identified as Bacillus cereus, B. alvei and B. circulans. While, Lactobacillus sp. was isolated from the sewage sample. The bacteria were optimized for various growth conditions ...

Among traditional hazardous waste sources, pharmaceutical-containing wastewater and acidic mine drainage need treatment to preserve the expected water supply quality. A nano zero-valent iron (nZVI)-enriched of these two streams is evaluated for simultaneous removal various heavy metal ions, organic pollutants, sulfates, efficiency system, separation reaction products in fluidized-bed reactor. T...

As the antibiotic pollution source in environment, a large amount of biowastes generated from fermentation manufacture needs proper disposal. Recycling biowaste as resources and nutrients is great interest. Besides, degradation or removal antibiotics indispensable for reclamation manufacturing biowaste. To establish environmentally friendly disposal strategies lincomycin (LMB), we screened micr...

Wastewater discharge from textile industries concern environmental risks. Superiority of microbial methods over other high cost combined includes conversion persistent organic materials to non-toxic last materials, sustainability, low cost, and comfortable. Textile wastewaters can have opposite effects on the quality water in total carbon (TOC) Chemical oxygen demand (COD). Agitation cultures r...