Anoxic and oxic biological fluidized bed treatment of amines and phenol

1995 ◽  
Vol 31 (1) ◽  
pp. 185-193 ◽  
Author(s):  
Van T. Nguyen ◽  
Wen K. Shieh
Keyword(s):  
Fluidized Bed ◽  
Industrial Wastewater ◽  
Petroleum Refinery ◽  
Fluidized Bed Reactors ◽  
Nitrification Rate ◽  
Carbon Oxidation ◽  
Anoxic Conditions ◽  
Loading Rates ◽  
Petroleum Refinery Wastewater ◽  
Fluidized Bed Process

Significant amounts of nitrogenous organic compounds found in industrial wastewaters can have major deleterious effects on the environment and public health; therefore, the removal of these compounds has become an essential component in industrial wastewater treatment. In this work the biodegradability of diisopropylamine and monoethylamine - compounds commonly found in petroleum refinery wastewater - was investigated under oxic and anoxic conditions. Biological fluidized bed reactors were employed in the investigation of single-stage carbon oxidation and nitrification with the amines and phenol as the compounds targeted for removal. Complete carbonaceous oxidation was achieved with a 50% nitrification rate. The feasibility of utilizing the amines and phenol as the organic carbon source for denitrification in an anoxic biological fluidized bed process was also examined. Carbon removal under anoxic conditions was greater than 85% at carbon loading rates less than 0.05 mg TOC/mg biomass-day and decreased to 60% at higher loading rates. Over the range of loading rates tested, the average ratio of mg TOC removed to mg NO3−-N utilized was observed to be 1.26.

Industrial Wastewater Treatment Using Anaerobic Fluidized Bed Reactors

1983 ◽  
Vol 15 (8-9) ◽  
pp. 169-176 ◽  
Author(s):  
John S Jeris
Keyword(s):  
Wastewater Treatment ◽  
Fluidized Bed ◽  
Industrial Wastewater ◽  
Anaerobic Treatment ◽  
Industrial Wastes ◽  
Positive Energy ◽  
Fluidized Bed Reactors ◽  
Sludge Treatment ◽  
Detention Time ◽  
Positive Energy Balance

Pilot plant results of anaerobic treatment using granular biological fluidized bed treatment for a number of industrial wastes is presented. Wastes containing from 5,000 to 54,000 mg/ℓ, were treated with 65 to 95 percent COD removal in 0.3 to 4.9 days hydraulic detention time. Organic loadings of 3 to 38 kg COD/m3-day were used. An energy comparison showed anaerobic treatment to produce a positive energy balance compared to an energy need for comparable activated sludge treatment.

Tailoring of highly efficient nitrifying biofilms in fluidized bed for ammonia-rich industrial wastewater treatment

2000 ◽  
Vol 42 (3-4) ◽  
pp. 357-362 ◽  
Author(s):  
S. Tsuneda ◽  
T. Miyoshi ◽  
Y. Aoi ◽  
A. Hirata
Keyword(s):  
Fluidized Bed ◽  
Industrial Wastewater ◽  
Domestic Wastewater ◽  
Nitrifying Bacteria ◽  
Nitrification Rate ◽  
Fish Analysis ◽  
Ammonia Oxidizing Bacteria ◽  
High Concentration ◽  
Stepwise Reduction ◽  
Biofilm Structure

We proposed two tailoring methods for efficient nitrifying biofilms on particles which are expected to be used in fluidized bed in nitrogen removal processes for industrial wastewaters. The first method was examined with gradual reduction of the hydraulic retention time in continuous feeding reactor to form biofilm with high nitrification ability. As a result, nitrification rate was successfully improved mainly due to acclimation of nitrifying bacteria to higher loading. The second tailoring method for nitrifying biofilm started with the biofilm which had been previously constructed in synthetic domestic wastewater containing high concentration of NH4+-N as well as various biodegradable organic compounds. Stepwise reduction of C/N ratio in inlet wastewater was performed during one month simultaneously with observation of microbial population dynamics in the biofilm using fluorescent in situ hybridization (FISH) analysis. As a result, this acclimation process promoted occupation of the biofilm by ammonia-oxidizing bacteria and resulted in making suitable biofilm structure for nitrification of ammonia-rich industrial wastewater. Moreover, it is confirmed that this new tailoring method greatly shortened required time to obtain nitrifying biofilms.

scholarly journals Fenton process in dispersed systems for industrial wastewater treatment

2019 ◽  
Vol 73 (1) ◽  
pp. 47-62
Author(s):  
Ana Popovic ◽  
Sonja Milicevic ◽  
Vladan Milosevic ◽  
Branislav Ivosevic ◽  
Jelena Carapic ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Organic Compounds ◽  
Hydroxyl Radicals ◽  
Process Parameters ◽  
Ferrous Iron ◽  
Industrial Wastewater ◽  
Operating Conditions ◽  
Fluidized Bed Reactors ◽  
Fenton Process ◽  
Dispersed Systems

Industrial wastewater contains recalcitrant organic compounds with a very complex chemical structure, built of molecules with long chains of carbon atoms and attached different functional groups. Chemical or biological treatments used for removal of these compounds are being replaced with more efficient non-commercial wastewater treatments. Advanced oxidation processes overcome limitations of conventional methods regarding formation of by-products during degradation of recalcitrant organic compounds. The Fenton process, or use of the Fenton?s reagent, has became one of the most utilized processes due to simplicity, economy and accessible amounts of ferrous iron and hydrogen-peroxide, which are used in the process. In specific, the Fenton?s reagent is a catalytic-oxidative mixture of these two components. The ferrous iron Fe2+ initiates and catalyzes decomposition of H2O2, resulting in generation of hydroxyl radicals, which are the main radical species in the process able to detoxify several organic pollutants by oxidation. In addition, other mechanisms besides formation of hydroxyl radicals may occur during the Fenton process and participate in degradation of target pollutants. Generally, the treatment efficiency relies upon the physical and chemical properties of target pollutants and the process operating conditions. The main disadvantage of the Fenton process is production of sludge formed by iron hydroxide at certain pH values. An alternative solution for this problem is application of this process in fluidized bed reactors. This paper presents an overview of Fenton and photo-Fenton processes in dispersed systems for removal of different industrial wastewater pollutants. The most important process parameters, required for efficient degradation of recalcitrant organic compounds are also described, such as the catalyst type, pH value, temperature, H2O2 concentration and retention time. Strict control of Fenton process parameters in fluidized bed reactors at desired values can bring these systems to the commercial use.

Single Phase and Two Phase Anaerobic Stabilization in Fluidized Bed Reactors

1983 ◽  
Vol 15 (8-9) ◽  
pp. 333-344 ◽  
Author(s):  
P M Sutton ◽  
A Li
Keyword(s):  
Fluidized Bed ◽  
Process Design ◽  
Pilot Plant ◽  
Single Phase ◽  
Fluidized Bed Reactors ◽  
Phase System ◽  
Two Phase ◽  
Effluent Quality ◽  
Loading Rates ◽  
Scale Design

Pilot plant studies were completed in order to derive information for process design of single and two phase anaerobic fluidized bed systems. A better effluent quality was obtained from the two phase system than from the single phase system at comparable or higher organic loading rates. A full-scale design example is presented to illustrate the implications of the pilot plant results.

RESEARCH AND EVALUATE TREATMENT EFFICIENCY ON TAPIOCA PROCESSING INDUSTRIAL WASTEWATER BY AEROBIC BIOFILTER TECHNOLOGY WITH VARIOUS MATERIALS

2010 ◽  
Vol 13 (3) ◽  
pp. 54-66
Author(s):  
Phuong Thi Thanh Nguyen ◽  
Phuoc Van Nguyen ◽  
Anh Cam Thieu
Keyword(s):  
Wastewater Treatment ◽  
Industrial Wastewater ◽  
Utilization Rate ◽  
Organic Loading ◽  
Treatment Efficiency ◽  
Research Results ◽  
Loading Rates

This study was performed to evaluate the efficiency of tapioca processing wastewater treatment using aerobic biofilter with variety of biofilter media: coir, coal, PVC plastic and Bio - Ball BB15 plastic. Research results in the lab demonstrated all four aerobic biofilter models processed can treated completely N and COD which COD reached 90-98% and N reached 61-92%, respectively, at the organic loading rates in range of 0.5, 1, 1.5 and 2 kgCOD/m3.day. The results identified coir filter was the best in four researched materials with removal COD and specific substract utilization rate can reach 98%, and 0.6 kg COD/kgVSS.day. Research results open the new prospects for the application of the cheap materials, available for wastewater treatment.

Optimization and Control Petroleum Refinery Wastewater Treatment Systems — Status, Trends and Needs

1989 ◽  
Vol 24 (3) ◽  
pp. 463-477
Author(s):  
Stephen G. Nutt
Keyword(s):  
Wastewater Treatment ◽  
Process Control ◽  
Petroleum Refinery ◽  
Control Strategies ◽  
Refinery Wastewater ◽  
Statistical Process ◽  
Petroleum Refinery Wastewater ◽  
Optimization And Control ◽  
And Control ◽  
Wastewater Treatment Systems

Abstract Based on discussions in workshop sessions, several recurring themes became evident with respect to the optimization and control of petroleum refinery wastewater treatment systems to achieve effective removal of toxic contaminants. It was apparent that statistical process control (SPC) techniques are finding more widespread use and have been found to be effective. However, the implementation of real-time process control strategies in petroleum refinery wastewater treatment systems is in its infancy. Considerable effort will need to be expended to demonstrate the practicality of on-line sensors, and the utility of automated process control in petroleum refinery wastewater treatment systems. This paper provides a summary of the discussions held at the workshop.

Online Instrumentation of Petroleum Refinery Wastewater Treatment Plants

1989 ◽  
Vol 24 (3) ◽  
pp. 435-450 ◽  
Author(s):  
J.P. Stephenson
Keyword(s):  
Wastewater Treatment ◽  
Continuous Monitoring ◽  
Wastewater Treatment Plants ◽  
Petroleum Refinery ◽  
Petroleum Industry ◽  
Refinery Wastewater ◽  
Analytical Instruments ◽  
Petroleum Refinery Wastewater ◽  
Sample Characterization ◽  
Industry Wastewater

Abstract Several online analytical instruments are commercially available to allow continuous monitoring of petroleum industry wastewater treatment plants. Satisfactory usage of these instruments requires -special attention for sample preconditioning and sample characterization prior to selection. Specific examples of the available instruments are provided. Effective maintenance of instruments is emphasized.

Influence of Seeding Conditions on Initial Biofilm Development during the Startup of Anaerobic Fluidized Bed Reactors

1989 ◽  
Vol 21 (4-5) ◽  
pp. 157-165 ◽  
Author(s):  
F. Ehlinger ◽  
J. M. Audic ◽  
G. M. Faup
Keyword(s):  
Fluidized Bed ◽  
Future Development ◽  
Protein Concentration ◽  
Specific Activity ◽  
Fluidized Bed Reactor ◽  
Fluidized Bed Reactors ◽  
Support Material ◽  
Biofilm Development ◽  
Initial Biofilm

The characterization of the biofilm of an anaerobic fluidized-bed reactor was completed under standard conditions. The distribution of the fixed protein concentration depended on the level in the reactor. The protein concentration reached 1520 µg.g−1 of support at the top of the reactor and only 1200 µg.g−1 at the bottom after 504 hours of operation but the specific activity of the biofilm was 33×10−4 µM acetate.h−1.mg−1 proteins at the bottom and only 26×10−4 µM.h−1.mg−1 at the top. The efficiency of a fluidized bed reactor and the composition of the biofilm changed with an increase of the pH from 7 to 8.5 during the seeding of the support material. Future development of the biofilm and the specific activity of the support were affected.

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