Current Environmental Engineering - Volume 1, Issue 1, 2014

A yeast strain with high activity of phenol degradation was isolated from activated sludge of a wastewater treatment plant in a coking chemical factory, and identified as Candida tropicalis according to the analysis of VITEK-32 and its 18SrDNA gene sequence. The strain designated as JP-1 was able to grow on phenol as a sole carbon and energy source and it can degrade more than 90% of 1800 mg⋅L-1 phenol within 72h. T Read More

A novel macroporous anion exchange resin (NDP-5) has been successfully developed for selectivity removing nitrate utilizing the acrylic cross-linked polymer skeleton. The process of the nitrate adsorption onto NDP-5 resin follows the Freundlich model, the pseudo-first-order and the pseudo-second-order kinetic models well. Compared to the commercial resin D213, NDP-5 resin displays more preferable adsorption ability tow Read More

Degussa P25 powder embedded and TiO2 immobilized on activated carbon (TiO2-P25/AC) was used for photocatalytic degradation of phenol. The effects of TiO2-P25 loading, solution pH and initial phenol concentration were investigated using response surface methodology (RSM) based on central composite design (CCD). By applying the quadratic regression analysis, the polynomial expression describing the process efficien Read More

A novel photocatalytic system (MEL/TiO2/QS) based on microwave electrodeless lamp (MEL) and TiO2 films supported on quartz sheets (TiO2/QS) was established for high photocatalytic efficiency and long catalyst life. The results showed that the degradation efficiency for reactive brilliant red X-3B in MEL/TiO2/QS was equally as that in a suspended TiO2 system. Furthermore, under the microwave irradiation, the TiO2/QS had hi Read More

In order to optimize sludge depth in sand drying beds under the climatic conditions of Saudi Arabia, the effect of sludge initial depth on the physical and chemical characteristics of dried municipal sludge samples was investigated. The investigation was carried out for one year at Al-Khobar Wastewater Treatment Plant, where initial sludge depths of 10, 15, 20, 25, 30 and 35 cm were implemented. Sludge samples were colle Read More

Agro based industry such as palm oil mill generates effluent with high nutrient content. Utilisation of the effluent as a source of nutrient for growing water hyacinth (Eichornia crassipes) could reduce the eutrophication. Then, the harvested water hyacinth can be converted into several useful products such as compost, biogas, animal feed, paper, etc. In this study, the potential of diluted treated palm oil mill effluent (DTPOME) Read More

Impregnation of activated carbon or oxidized activated carbon was carried out using iron(III) nitrate as starting solution and ammonia as precipitating agent, intending the removal from aqueous solution of arsenates. The high affinity of iron oxyhydroxide nanocrystals towards inorganic arsenic species (pollutant) is widely known. Activated carbon can provide high surface area for adsorption. The role of carbon Read More

Research on lignin biodegradation is important in the field of global carbon cycling as well as in the bleaching and pulp industries. Therefore, a laboratory scale feasibility study on the anaerobic treatment of recycled paper mill effluent (RPME) in modified anaerobic inclining-baffled reactor (MAI-BR) was conducted for a period of 180 days. However, the removal of lignin was partially evaluated at the steady state condition of Read More

An activity based emission inventory was prepared for mobile sources in an urban center, Izmir, Turkey. The vehicles were counted and categorized into four main vehicle categories; motorcycles, passenger cars, light–duty vehicles and heavy–duty vehicles by a portable vehicle classifier system at 19 major streets in the city. The vehicles were also counted continuously for 24 hours during a week in order to determine the daily a Read More