A pilot study of a biotrickling filter for the treatment of odorous sewage air

2001 ◽  
Vol 44 (9) ◽  
pp. 295-299 ◽  
Author(s):  
L. Wu ◽  
Y.-Y. Loo ◽  
L.C.C. Koe
Keyword(s):  
Wastewater Treatment Plants ◽  
Cost Effective ◽  
Pilot Scale ◽  
Air Pollutant ◽  
Biotrickling Filter ◽  
Pollutant Emissions ◽  
Physical Treatment ◽  
Low Concentrations ◽  
Secondary Pollutants ◽  
Set Up

The nuisance impact of air pollutant emissions from wastewater treatment plants (WWTPs) is a major issue of concern to Singapore and to many developing cities worldwide. Existing chemical and physical treatment methods are efficient but costly, and may generate secondary pollutants. Biotreatment, on the other hand, is a proven control technology for effectively removing hydrogen sulphide (H2S), the principal odour component of sewage air. The biotechnology is cost-effective to remove low-concentrations of biodegradable compounds from a large flow of waste gases. A pilot-scale biotrickling filter, packed with pall rings, was set up at a WWTP in Singapore to investigate its effectiveness for treatment of odorous sewage air. A series of experiments were conducted to assess the performance of the biotrickling filter under various operating scenarios. Results indicated that even at 5 second gas retention time, the biotrickling filter could remove 95% of the inlet H2S. The behaviour of the biotrickling filter under various operating scenarios are presented and discussed in this paper.

scholarly journals Abatement of odour emissions by UV/Ozone oxidation process

2018 ◽  
Vol 20 (3) ◽  
pp. 669-673 ◽  
Keyword(s):  
Oxidation Process ◽  
Wastewater Treatment Plants ◽  
Advanced Treatment ◽  
Industrial Plants ◽  
Waste Gas ◽  
Low Concentrations ◽  
Gaseous Stream ◽  
Odour Emissions ◽  
Set Up ◽  
Uv Ozone

<p>The growing expectations of the population and the increasingly stringent regulations about air pollution have resulted in the need to minimize and conveniently treat the waste gas from different emission sources. The emissions from a large variety of plants, including waste and wastewater treatment plants, result mainly from the degradation of organic matter. These emissions are composed of a complex of substances emitted at low concentrations from diffusive sources. These characteristics make complex their treatment in economically efficient conditions. The design and management of environmental protection and industrial plants, therefore, require the implementation of focused processes for the control of the target compounds. The present study shows the applicability of an UV-Ozone lab-scale system for odours and VOCs removal. An artificial gaseous stream contaminated by toluene, at different incoming concentrations, was treated evaluating the abatement efficiencies in terms of odours and total VOCs as a function of power and contact time. The residue ozone concentrations was determined in order to optimize the set-up conditions. The results were discussed with the aim of evaluating the feasibility of the investigated solution for the advanced treatment of the waste gas from environmental facilities. Removal efficiencies up tp 91% were reached for the investigated conditions. Lower inlet concentrations resulted in high residue ozone outgoing the processes and, thus, it resulted over dimensioned for inlet load lower than 1,22 mg per minute.</p>

Climate and Air Quality Co-Benefits of Local Air Pollution Control: The Case of China’s Power Sector

2013 ◽  
Vol 726-731 ◽  
pp. 2045-2050
Author(s):  
Min Hua Ye ◽  
Can Wang
Keyword(s):  
Air Pollution ◽  
Cost Effective ◽  
Air Pollutant ◽  
Power Grids ◽  
Pollutant Emissions ◽  
Air Pollution Control ◽  
Power Sector ◽  
Mitigation Potential ◽  
Global Environmental ◽  
Local Air Pollution

Power sector is the major emitter in China of local air pollutants including SO2 and NOX, and CO2 and Hg with global environmental impacts. This study applied a bottom-up optimization model considering multi regional power grids in China to simulate how the local air pollution (LAP) control would shape the power generation mix before 2020 and estimate the mitigation potential of CO2 and Hg emission provided by LAP control. Results show that with LAP control targets, in 2020, 100% of coal-fired units need to be equipped with FGD or adopt in-furnace desulphurization for CFB; approximately 85% of coal-fired units should be equipped with SCR while the others retrofitted to be low NOX boilers. Compared to the scenario without environmental constraints, Hg emission decreases 46% while CO2 emission increases 0.64% in 2020 with LAP control targets. Control polices of local and global air pollutant emissions should be combined early in developing countries to obtain a cost-effective way for sustainable development.

Odor Abatement in Biotrickling Filters for Wastewater Treatment Plants in Petrochemical Industries: Determination of Main Components of VOCs and Assessment of REs

2014 ◽  
Vol 1065-1069 ◽  
pp. 3172-3176
Author(s):  
Jian Zhai ◽  
Chun Hua Jiang ◽  
Jin Zhou
Keyword(s):  
Wastewater Treatment Plants ◽  
Bacterial Species ◽  
Water Soluble ◽  
Biotrickling Filter ◽  
Benzene Toluene ◽  
Poorly Water Soluble ◽  
Set Up ◽  
Main Components ◽  
Key Parameter

A biotrickling filter has been set up in WWTP of Nanjing petrochemical factory for about 6 months. The purpose of this project was to assess the ability of the biotrickling filter to remove hardly biodegradable VOCs such as benzene, toluene, ethylbenzene and xylene which are recalcitrant and poorly water soluble and commonly found in petrochemical factories. PUF cubes (1 cm3) were used as the packing media treated with large amounts of circulating mineral salt medium added with bacterial species which came from secondary sedimentation tank of WWTP of Nanjing petrochemical industry. The controlled empty bed retention time (EBRT) of 90 s was a key parameter for reaching a removal efficiency of 91.7 %, 88.3 %, 70.7 % and 63.5 % for toluene, ethylbenzene, benzene and xylene, respectively. The analysis of the bacterial community in the BTF during VOC removal showed that Pseudomonas putida and Klebsiella sp. phylum were dominant microbes.

Nitrogen removal in multi-stage wastewater treatment plants by using a modified post-denitrification system

1998 ◽  
Vol 37 (9) ◽  
pp. 151-158
Author(s):  
Dieter Schreff ◽  
Peter A. Wilderer
Keyword(s):  
Wastewater Treatment ◽  
Carbon Source ◽  
Nitrogen Removal ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Pilot Scale ◽  
Feeding Rates ◽  
Multi Stage ◽  
Stage System ◽  
Set Up

Systems in which denitrification follows nitrification (post-denitrification) copy the natural sequence of nitrogen removal. The disadvantage of post-denitrification, however, is that an external carbon source must be added to the denitrification reactor. In the concept discussed in this paper, excess sludge from a high loaded activated sludge plant is used as carbon source and as source of denitrifiers in a three-stage system. The sludge is fed into a anoxic reactor placed in between the nitrification reactor (e.g., trickling filter) and the final clarifier. Two different operation methods were investigated at a pilot-scale system set up at the Ingolstadt wastewater treatment plant. Low nitrate effluent values were obtained at high sludge feeding rates, but at the expense of a significant increase in turbidity and NH4-N effluent concentrations. This problem could be solved by a reduction of the sludge feeding rate and by applying intermittent feeling. The effluent turbidity was kept at an acceptable level, but denitrification was relatively slow in progress. To achieve both low effluent turbidity and low nitrate discharge, a combination of pre- and post-denitrification is recommended.

scholarly journals Carbon Neutrality Pathways Effects on Air Pollutant Emissions: The Portuguese Case

Atmosphere ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 324
Author(s):  
Joana Monjardino ◽  
Luís Dias ◽  
Patrícia Fortes ◽  
Hugo Tente ◽  
Francisco Ferreira ◽  
...  
Keyword(s):  
Ghg Emissions ◽  
Cost Effective ◽  
Air Pollutant ◽  
Control Measures ◽  
Pollutant Emissions ◽  
Climate Mitigation ◽  
Carbon Neutrality ◽  
Positive Effects ◽  
Trade Offs ◽  
End Use

Air pollution and climate change are closely interlinked, once both share common emission sources, which mainly arise from fuel combustion and industrial processes. Climate mitigation actions bring co-benefits on air quality and human health. However, specific solutions can provide negative trade-offs for one side. The Portuguese Carbon Neutrality Roadmap was developed to assess conceivable cost-effective pathways to achieve zero net carbon emissions by 2050. Assessing its impacts, on air pollutant emissions, is the main focus of the present work. The bottom-up linear optimization energy system the integrated MARKAL-EFOM system (TIMES) model was selected as a modeling tool for the decarbonization scenarios assessment. The estimation of air pollutant emissions was performed exogenously to the TIMES model. Results show that reaching net zero greenhouse gas (GHG) emissions is possible, and technologically feasible, in Portugal, by 2050. The crucial and most cost-effective vector for decarbonizing the national economy is the end-use energy consumption electrification, renewable based, across all end-use sectors. Decarbonization efforts were found to have strong co-benefits for reducing air pollutant emissions in Portugal. Transport and power generation are the sectors with the greatest potential to reduce GHG emissions, providing likewise the most significant reductions of air pollutant emissions. Despite the overall positive effects, there are antagonistic effects, such as the use of biomass, mainly in industry and residential sectors, which translates into increases in particulate matter emissions. This is relevant for medium term projections, since results show that, by 2030, PM2.5 emissions are unlikely to meet the emission reduction commitments set at the European level, if no additional control measures are considered.

Evaluation of Effects of Ship Emissions Control Areas

2017 ◽  
Vol 2611 (1) ◽  
pp. 50-55 ◽  
Author(s):  
Zeru Qin ◽  
Jingbo Yin ◽  
Zhiqiang Cao
Keyword(s):  
Air Pollutant ◽  
Pollutant Emissions ◽  
Emissions Reduction ◽  
Shipping Industry ◽  
Emissions Control ◽  
Ship Emissions ◽  
Slow Steaming ◽  
Port Area ◽  
Green Port ◽  
Set Up

With the growing number of ships, emissions from the shipping industry now rank as one of the three major sources of air pollutants. This has aroused the concern of more and more countries and international organizations. To control shipping emissions, three ship emissions control areas (ECAs) have been set up in China. This study first evaluates the effectiveness of the ECA designed to reduce sulfur dioxide (SO2) emissions in the Shanghai, China, port area, and then estimates carbon dioxide (CO2) emissions reduction by regarding the ECA as a reduced speed zone by using container ships’ data. The case study of the port of Shanghai finds that for the year 2020, a reduction in SO2 emissions by at least 103,998.17 tons can be achieved with the 12-nmi ECA of Shanghai port, CO2 emissions can be reduced by 827,733.64 tons with a 12-knot speed limit in the 12-nmi ECA, and an additional SO2 reduction of 522.23 tons can be achieved by slow steaming within the ECA. The results also show that adoption of a shoreside power supply system can lead to a remarkable reduction of all the air pollutant emissions inventories. The positive effect of emissions reduction is much more significant than the extra costs incurred by ship operators and ports. The goal of reductions in emissions to improve the air quality of port areas could be achieved through adopting these “green” port policies in the future.

MITIGATION OF HAZARDOUS AIR POLLUTANT EMISSIONS: VACUUM vs. CONVENTIONAL SEWER SYSTEM

2017 ◽  
Vol 16 (4) ◽  
pp. 809-819 ◽  
Author(s):  
Gabriel Lazar ◽  
Iulia Carmen Ciobotici Terryn ◽  
Andreea Cocarcea
Keyword(s):  
Air Pollutant ◽  
Pollutant Emissions ◽  
Sewer System ◽  
Hazardous Air Pollutant

Nanofiltration of endocrine disrupting compounds

2003 ◽  
Vol 3 (5-6) ◽  
pp. 321-327 ◽  
Author(s):  
M. Gallenkemper ◽  
T. Wintgens ◽  
T. Melin
Keyword(s):  
Wastewater Treatment ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Endocrine Disrupting Compounds ◽  
Municipal Wastewater Treatment ◽  
Water And Wastewater Treatment ◽  
Wide Range ◽  
Endocrine Disrupting ◽  
Municipal Wastewater Treatment Plants ◽  
Set Up

Endocrine disrupting compounds can affect the hormone system in organisms. A wide range of endocrine disrupters were found in sewage and effluents of municipal wastewater treatment plants. Toxicological evaluations indicate that conventional wastewater treatment plants are not able to remove these substances sufficiently before disposing effluent into the environment. Membrane technology, which is proving to be an effective barrier to these substances, is the subject of this research. Nanofiltration provides high quality permeates in water and wastewater treatment. Eleven different nanofiltration membranes were tested in the laboratory set-up. The observed retention for nonylphenol (NP) and bisphenol A (BPA) ranged between 70% and 100%. The contact angle is an indicator for the hydrophobicity of a membrane, whose influence on the permeability and retention of NP was evident. The retention of BPA was found to be inversely proportional to the membrane permeability.

Ammonia removal in a pilot-scale WSP complex in Northeast Brazil

1996 ◽  
Vol 33 (7) ◽  
pp. 165-171 ◽  
Author(s):  
J. Soares ◽  
S. A. Silva ◽  
R. de Oliveira ◽  
A. L. C. Araujo ◽  
D. D. Mara ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Surface Waters ◽  
Wastewater Treatment Plants ◽  
Pilot Scale ◽  
Ammonia Removal ◽  
Northeast Brazil ◽  
Environmental Legislation ◽  
Aerobic Conditions ◽  
High Degree

Ammonia removal was monitored in a waste stabilisation pond complex comprising ponds of different geometries and depths under two different operational regimes. It was found that a high degree of ammonia removal commenced in the secondary maturation ponds, with the highest removals occurring in the shallowest ponds as a consequence of improved aerobic conditions. The tertiary maturation ponds produced effluents with mean ammonia concentrations of &lt; 5 mg N/l, the maximum permitted recommended by Brazilian environmental legislation for the discharge of effluents of wastewater treatment plants into surface waters. Ammonia removal in the secondary facultative and maturation ponds could be modelled using equations based on the volatilization mechanism proposed by Middlebrooks et al. (1982).

Sign in / Sign up

Export Citation Format

Share Document