Technological Strategies for Protecting and Improving the Biological Treatment of Wastewater from a Petrochemical Complex

1994 ◽  
Vol 29 (9) ◽  
pp. 133-141 ◽  
Author(s):  
Menahem Rebhun ◽  
Noah Galil
Keyword(s):  
Biological Treatment ◽  
Biological Processes ◽  
Water Cooling ◽  
Petrochemical Complex ◽  
Treated Effluent ◽  
Physico Chemical ◽  
Additional Protection ◽  
Technological Strategies ◽  
Biological Treatment Process ◽  
Raw Wastewater

The wastewater from a petrochemical complex is characterized by a diversity of pollutants including hydrocarbons, in free and emulsified form, phenols including cresols and xylenols, mercaptans, sulfides, ammonia and cyanides. The wastewater treatment of the reported petrochemical complex is based on a multiple stage treatment approach, consisting of physico - chemical, and biological processes. The biological treatment process could be efficiently protected by preliminary wastewater flow regulation, controlling hydraulic and pollutants loads. Additional protection and improvement of the biological treatment was achieved by preliminary removal of more than 90 percent of the oil found in free and in emulsified form in the raw wastewater. Significant reliability and efficiency could be achieved by a combined biological treatment consisting of aerated ponds, lime clarification and a water cooling industrial system, recycling treated effluent as make-up.

Multiple Technological Barriers Combined with Recycling of Water and Oil in Wastewater Treatment of a Coastal Petrochemical Complex

1992 ◽  
Vol 25 (12) ◽  
pp. 277-282 ◽  
Author(s):  
N. Galil ◽  
M. Rebhun
Keyword(s):  
Wastewater Treatment ◽  
Development Project ◽  
Mediterranean Coast ◽  
Main Stream ◽  
Industrial Complex ◽  
Biological Processes ◽  
Dissolved Air Flotation ◽  
Petrochemical Complex ◽  
Treated Effluent ◽  
Technological Barriers

A research and development project was carried out at a petrochemical complex, located at a distance of about two miles from the Mediterranean coast in the Gulf of Haifa, Israel. The program included: characterization of the wastewater, the main stream as well as lateral streams generated by specific production processes; laboratory and pilot studies of chemical flocculation-dissolved air flotation (DAF); a comparative study of three alternative biological processes: activated sludge, rotating biological contactor (RBC) and aerated ponds (AP); a survey of the biological process occurring in the recirculated cooling water system (RCS) of the industrial complex; conditioning and dewatering of the oily sludges produced by the wastewater treatment facilities and by some other units. Following the research results and conclusions, the developed solution was based on: a) multiple stage treatment, achieved by combining physico-chemical and biological processes, creating several technological barriers in order to avoid uncontrolled emissions into the marine environment; b) maximal recycling of water(treated effluent) and oil for minimizing the disposal of pollutants outside the industrial zone. Flexibility as well as complete independent operation of the treatment units have increased significantly the reliability of producing a final effluent of high and safe quality.

Physico-Chemical-Biological Treatment of Municipal Wastewater

1991 ◽  
Vol 24 (7) ◽  
pp. 285-292 ◽  
Author(s):  
F. A. El-Gohary ◽  
S. I. Abo-Elela ◽  
S. A. Shehata ◽  
H. M. El-Kamah
Keyword(s):  
Biological Treatment ◽  
Municipal Wastewater ◽  
Sewage Treatment ◽  
Organic Content ◽  
High Rate ◽  
Experimental Investigations ◽  
Oxidation Pond ◽  
Treated Effluent ◽  
Physico Chemical ◽  
Solids Removal

Physico-chemical sewage treatment via coagulation-sedimentation is put in action for suspended solids removal. The effectiveness of this technology concerning the soluble organic content is extremely low. In direct comparison, the use of a biological sand-bed and a high-rate oxidation pond as a tertiary treatment for the chemically treated effluent brought about a substantial increase in efficiency. Experimental investigations performed led to the conclusions that, for the reuse of wastewater for irrigation, chemical treatment is appropriate. For discharge of treated effluents into surface water, combination of the physico-chemical-biological scheme is recommended.

Physico-chemical and biological treatment strategies for converting municipal wastewater and its residue to resources

Chemosphere ◽  
2021 ◽  
pp. 130881
Author(s):  
Asfak Patel ◽  
Ambika Arkatkar ◽  
Srishti Singh ◽  
Alija Rabbani ◽  
Juan David Solorza Medina ◽  
...  
Keyword(s):  
Biological Treatment ◽  
Municipal Wastewater ◽  
Treatment Strategies ◽  
Physico Chemical

Using Two-Phase Anaerobic Digestion for Organic Waste

2014 ◽  
Vol 953-954 ◽  
pp. 300-303 ◽  
Author(s):  
Fang Yin ◽  
Wu Di Zhang ◽  
Jing Liu ◽  
Hong Yang
Keyword(s):  
Anaerobic Digestion ◽  
Biological Treatment ◽  
Organic Waste ◽  
Single Phase ◽  
Treatment Process ◽  
Maximal Activity ◽  
Two Phase ◽  
High Efficient ◽  
Development Direction ◽  
Biological Treatment Process

The essence of the two phase anaerobic biological treatment process is to place acid bacteria and methane-producing bacteria in two reactors respectively, where it can provide the optimal conditions for their growth and metabolism, allowing them to live up to their maximal activity, which greatly improve processing capacity and efficiency compared to a single-phase anaerobic digestion. The paper start with the two phase anaerobic digestion process, in order to discuss the development direction of high efficient anaerobic digestion system.

scholarly journals Bench-Scale Study of Aqueous MTBE Degradation by Combined Advanced Oxidation and Biological Processes

2021 ◽  
Author(s):  
Azadeh Asadi
Keyword(s):  
Biological Treatment ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Methyl Tert Butyl Ether ◽  
Molar Ratio ◽  
Second Phase ◽  
Biological Processes ◽  
Butyl Ether ◽  
Pre Treatment ◽  
Total Residence Time

The oxidation of methyl tert-butyl ether (MTBE) by advanced oxidation processes in conjunction with biological treatment in investigated. Firsst, the degradation of MTBE by UV/H2O2 and UV/TiO2 is studied. It is found that the optimum molar ratio or H2O2/MTBE is about 14 while the optimum concentration of TiO2 is 1.5 g/L. In addition, it is observed that a combined process of UV/H2O2 and UV/TiO2 does not have any advantage over each of these processes alone. In the second phase, biodegradability of MTBE by aerobic microorganisms is evaluated in three different approaches including BODu assessment, removal of MTBE by non-acclimated, and acclimated microorganisms. It is shown that the acclimatization of microorganisms enhances the rate of biodegradation of MTBE. Finally, it is observed that the rate of bioreaction is not improved after a photochemical pre-treatment. It is also found that using the integration of photochemical and biological treatment reduced the total residence time.

Grey water characterisation and its impact on the selection and operation of technologies for urban reuse

2004 ◽  
Vol 50 (2) ◽  
pp. 157-164 ◽  
Author(s):  
B Jefferson ◽  
A. Palmer ◽  
P. Jeffrey ◽  
R. Stuetz ◽  
S. Judd
Keyword(s):  
Nutrient Deficiency ◽  
Municipal Sewage ◽  
Source Water ◽  
Biological Processes ◽  
Grey Water ◽  
Treated Effluent ◽  
Variable Nature ◽  
Medium Strength ◽  
Area Of Concern ◽  
Potential Area

Characterisation of grey water reveals a source water that is similar in organic strength to a low-medium strength municipal sewage influent but with physical and biodegradability characteristics similar to a tertiary treated effluent. The characteristics of the water suggest biological processes are the most suitable unit processes for treating grey water. The highly variable nature of the source requires that selected technologies must be inherently robust in their operation. One potential area of concern is the high COD/BOD ratio and nutrient deficiency in terms of both macro and micro nutrients which grey water exhibits potentially retard the efficacy of biological processes.

Physico-chemical monitoring of biodegradation of furfural from oil industry effluents from the Arzew refinery (Oran) Algeria

2022 ◽  
Vol 11 (6) ◽  
pp. 667-675
Author(s):  
Amina-Afaf MOUFFAK
Keyword(s):  
Biological Treatment ◽  
Oxygen Demand ◽  
Oil Industry ◽  
Petroleum Products ◽  
Wash Water ◽  
Treatment Level ◽  
Chemical Monitoring ◽  
Pollution Problem ◽  
Physico Chemical ◽  
Direct Discharge

Furfural is one of the petroleum products posing a potential danger to the environment and human health. However, the decontamination of these pollutants released into the environment is primarily governed by biodegra-dation processes. This study is based on biodegradation kinetics at increasing concentrations of furfural by natural mixed culture in order to assess the potential of this process in the elimination of furfural from petrochemical effluents from the ARZEW refinery. This biodegradation was measured through physicochemical parameters such as pH, electrical conductivity, con-centration of hydrocarbons, the chemical oxygen demand (COD), biochemi-cal oxygen demand (BOD5) and the concentration of furfural. The results obtained show at a concentration of 250ppm of injected furfural: a decrease in pH 4.9 and an increase in other parameters (conductivity 3450 μS.cm-1, HC 102 mg / l; furfural 210 ppm, COD 327mg / l, BOD5 98mgO2 / l. The study findings indicated that the injection of these effluents with concentrations greater than 180 ppm leads to values of pH, EC, HC, Furfural, COD, BOD5 which do not comply with direct discharge standards and disrupt biological treatment. The high levels of furfural not only cause a pollution problem but can also disrupt the functioning of bacteria at the biological treatment level. Therefore, dilution with the filtration wash water before switching to biologi-cal treatment is recommended in order to reduce the concentrations below 180 ppm.

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