Degradation of Oil by Land Disposal

1987 ◽  
Vol 19 (8) ◽  
pp. 99-105 ◽  
Author(s):  
G. Tesan ◽  
D. Barbosa
Keyword(s):  
Nutrient Availability ◽  
Filter Cake ◽  
Test Procedure ◽  
Pilot Scale ◽  
Effluent Treatment ◽  
Biological Degradation ◽  
Chemical Fertilizers ◽  
Land Disposal ◽  
Micro Organisms

The work presented consists of a test procedure applied at a pilot scale using soil as a biological degradation agent. The experiments described were carried out with oily residues considered as wastes difficult to degrade by other means. The tests were applied to filter cake with activated clay containing 40% oil and oily residues from re-refining of lubricants to give white oils and vaseline. The effect of the amount of moisture is evaluated using a mechanical stirrer to improve the interaction between the wastes and microorganisms. The following are also evaluated: nutrient availability; incorporation of micro-organisms into the soil; introduction of chemical fertilizers; and, injections of sludge from effluent treatment plants.

scholarly journals Simultaneous Adsorption and Biodegradation of Reactive Dyes using Jatropha Deoiled Cakes

2019 ◽  
Vol 8 (12) ◽  
pp. 3246-3250
Keyword(s):  
Biological Treatment ◽  
Degradation Rate ◽  
Human Life ◽  
Reactive Dyes ◽  
Poor Quality ◽  
Effluent Treatment ◽  
Biological Degradation ◽  
Scientific Communities ◽  
The Poor ◽  
Effect Of Glucose

Endemic pollution problems due to discharge of wastewaters are affecting all the aspects of human life. The poor quality effluents coming from industries is destroying the fragile ecosystem, leading to various apprehensions amongst researchers and scientific communities. Treatment of wastewaters have become an urgent need of the society, which cannot be ignored. Incineration, absorption on solid matrices and biological treatment are some of the effluent treatment methods available. These methods, however, have their own disadvantages. This work explores the application of jatropha deoiled cakes on the concurrent adsorption and biological degradation of reactive dyes. Reactive blue, reactive yellow, reactive red were used for the experiments. The combined experiments were tested for effect of glucose concentrations as well as initial concentrations. Glucose concentrations of 1 g/l, 2 g/l and 3 g/l were taken. All the dyes were varied from 100 ppm to 600 ppm. It was observed that combined degradation yielded higher degradation compared to biological degradation alone. The degradation rate varied with the variation of glucose concentration and it also varied with the initial concentration.

Integrated UF–NF–RO route for gold mining effluent treatment: From bench-scale to pilot-scale

Desalination ◽  
2018 ◽  
Vol 440 ◽  
pp. 111-121 ◽  
Author(s):  
Míriam C.S. Amaral ◽  
Luiza B. Grossi ◽  
Ramatisa L. Ramos ◽  
Bárbara C. Ricci ◽  
Laura H. Andrade
Keyword(s):  
Gold Mining ◽  
Pilot Scale ◽  
Effluent Treatment ◽  
Bench Scale ◽  
Mining Effluent

scholarly journals Cause of rapid monochloramine decay observed in treated water

2016 ◽  
Vol 17 (3) ◽  
pp. 752-758 ◽  
Author(s):  
Sam Hancock ◽  
Martin Harris ◽  
David Cook
Keyword(s):  
Water Treatment ◽  
Water Samples ◽  
Pilot Scale ◽  
The Other ◽  
Biological Degradation ◽  
Filter Media ◽  
Rapid Decay ◽  
Treated Water ◽  
Water Treatment Plants ◽  
The Impact

Rapid monochloramine decay has been observed in the product water of three River Murray water treatment plants (WTPs). Previous investigations identified that rapid monochloramine decay was microbiological in nature and observed in samples taken after media filtration but was absent in filtered water samples from a fourth WTP of similar design. The filters at the WTP not exhibiting rapid decay are backwashed with filtered non-disinfected water whereas the other WTPs backwash with treated chloraminated water. It was therefore hypothesised that backwashing filters with chloraminated water was the cause of the rapid monochloramine decay. A pilot-scale study was conducted to investigate the impact of backwashing with chloraminated water on the occurrence of microbiologically accelerated monochloramine decay. Additional samples were analysed to assess the impact of chloraminated backwash water on N-Nitrosodimethylamine (NDMA) formation and biological degradation of taste and odour compounds 2-methyl isoborneol (MIB) and geosmin in the filter media. Backwashing with chloraminated filtered water was concluded to be the cause of the observed rapid monochloramine decay, with rapid decay observed within 8 weeks for the filters backwashing with chloramines. Additionally, backwashing with chloraminated filtered water was observed to increase NDMA formation and impair the biological degradation performance of MIB and geosmin.

Large Scale Anaerobic-Aerobic Treatment of Complex Industrial Waste Water Using Biofilm Reactors

1991 ◽  
Vol 23 (7-9) ◽  
pp. 1427-1436 ◽  
Author(s):  
J. J. Heijnen ◽  
A. Mulder ◽  
R. Weltevrede ◽  
J. Hols ◽  
H. L. J. M. van Leeuwen
Keyword(s):  
Industrial Wastewater ◽  
Large Scale ◽  
Pilot Scale ◽  
Rate Process ◽  
Practical Application ◽  
Industrial Waste Water ◽  
Biofilm Reactors ◽  
Micro Organisms ◽  
Production Problems ◽  
Air Lift

Warm concentrated industrial wastewaters are preferably treated in an anaerobic reactor for reasons of energy generation and low surplus sludge production. Problems to be solved in the practical application concern a low growth rate of the micro-organisms, their low settling rate process instability, and the need for after-treatment of the noxious anaerobic effluent which often contains NH4+ and HS−. The use of biomass immobilized on small suspended carriers (< 0.5 mm) has proven to be a suitable mean to overcome most of these problems. Results are presented on–pilot and full-scale pretreatment of industrial wastewater in an anaerobic 2-stage fluidized bed reactor for CH.-production.–laboratory and pilot scale post-treatment of the anaerobic effluent, which contains NH4+. and HS2− in an aerobic air-lift suspension reactor for the production of NO3− and SO4−.

Condition Optimization of Dissolved Air Flotation-Filter and Mechanism Research

2011 ◽  
Vol 374-377 ◽  
pp. 975-981
Author(s):  
Ying Li ◽  
Ke Feng Zhang ◽  
Mei Li
Keyword(s):  
Yellow River ◽  
Filter Material ◽  
Reflux Ratio ◽  
Biological Degradation ◽  
Reservoir Water ◽  
Dissolved Air Flotation ◽  
Average Value ◽  
Condition Optimization ◽  
Activated Carbon Filter ◽  
Micro Organisms

DAFF’s treatment effect on Yellow River reservoir water under different reflux ratios is studied in this paper. Determination of indicators are turbidity、CODMn、NH4+-N、UV254、particle counter and unconventional indicators, such as biomass、TOC、olfactory threshold and smell of factors. The best reflux ratio is 14%; The average value of NH4+-N、CODMn 、UV254、and turbidity of carbon-sand filter’s outlet is 0.125、1.61mg/L、0.033cm-1 and 0.21NTU, accordingly, the average removal rates are 58.64 %、40.44 %、27.96 % and 90.26 %; The micro-organisms in filter material are mainly existed in the upper layer of activated carbon filter; The micro-organisms provide carbon-sand filter beneficial conditions for its biological degradation effect.

scholarly journals Development of a prototype for the treatment of ater contaminated with glyphosate

2019 ◽  
Vol 23 ◽  
pp. 2
Author(s):  
Julio Cesar Maciel Santos ◽  
Andressa Jenifer Rubio ◽  
Jean Carlos Araujo de Sousa ◽  
Ana Carolynna Severo Almeida ◽  
Rosângela Bergamasco ◽  
...  
Keyword(s):  
Batch Reactor ◽  
Pilot Scale ◽  
Effluent Treatment ◽  
Contaminated Water ◽  
Hybrid Compound ◽  
Magnetic Separator ◽  
Quality Water ◽  
Bodies Of Water ◽  
Relevant Work ◽  
Herbicide Glyphosate

One of the current challenges is to meet the demands for quality water since the contamination of bodies of water has been intensified in the last years with the increase in the use of pesticides. Therefore, finding a way to remove contamination by pesticides from water becomes a relevant work. In this study, it was presented the design and construction of a pilot-scale batch reactor prototype in order to remove the herbicide glyphosate from artificially contaminated water using a graphene hybrid composite with manganese ferrite, MnFe2O4-G, as an adsorbent. For the reactor design, it was initially required to know the steps necessary for the removal of the glyphosate from water, according to the chosen hybrid compound for the removal. After the steps were determinated, the components were selected to compose the treatment system. The layout of the prototype was defined and the positions of the elements and materials were chosen. Finally, the prototype was built and tested in the laboratory. The results showed that within 15 minutes the separation was completed and 70% of the adsorbent was recovered in the magnetic separator after 4 complete cycles of treatment. It was concluded that the prototype built fulfills the objective for which it was proposed, presenting the advantage of having all the steps of adsorption and desorption for glyphosate decontamination in the same equipment, being able to be expanded for use in effluent treatment plants.

Process optimisation of a combined system of floating medium and sand filter in prawn farm effluent treatment

1998 ◽  
Vol 38 (4-5) ◽  
pp. 87-93 ◽  
Author(s):  
H. H. Ngo ◽  
S. Vigneswaran
Keyword(s):  
Pilot Scale ◽  
Operating Conditions ◽  
High Rate ◽  
Effluent Treatment ◽  
Combined System ◽  
Treatment Technology ◽  
Sand Filter ◽  
Promising Alternative ◽  
Filter Performance ◽  
Upward Direction

A treatment technology known as “a combined system of floating medium and sand filter (FMSF)” was developed and tested successfully with prawn farm effluent. This system has a remarkable techno-economical advantages. Laboratory and semi pilot-scale studies were carried out to optimise the filter bed depth, backwash method and other operating conditions. The dewatering characteristics of sludge from filter backwash was also analysed. The filter was operated at a high rate. The experimental results indicated that: (i) in case of no in-line chemical addition, the smaller ratio between floating medium and sand filter depth gave rise better filter performance. At the filtration rate of 7.5–20 m3/m2.h and with an in-line chemical addition, the suitable depth of floating medium varied from 400–1000 mm for a sand filter depth of 400 mm; (ii) frequent (once in every 90–120 minutes) but short duration of backwash (not more than 60 seconds) was found to be suitable. During the backwash, the water and air were sent for 30 seconds in upward direction and then followed with upflow of water for another 30 seconds. Backwash water amount comprised only 1.2–1.8% of the filtered water production. A mechanical backwash system using rotating paddles is a promising alternative for floating medium filter; and (iii) the filterability of the sludge from filter backwash was low in case of no in-line chemical addition (specific resistance, r = 9.34 × 1010 m/kg) but improved with in-line flocculant addition (r = 3.07 × 109 − 1.29 × 1010 m/kg).

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