Current Status and Outlook of Odor Removal Technologies in Wastewater Treatment Plant

Ren, Baiming; Zhao, Yaqian; Lyczko, Nathalie; Nzihou, Ange

doi:10.1007/s12649-018-0384-9

Cited by 69 publications

(34 citation statements)

References 111 publications

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“…Normally, technologies of H 2 S removal from odor gas derived from WWTPs include physical/chemical (such as adsorption, chemical scrubbing) and biological approaches (biofiltration, biotrickling, activated sludge diffusion etc.) [66]. Singh et al [67] used zinc oxide-decorated multi-wall carbon nanotubes (ZnO-MWCNTs), which was a synthesis of the carbon nanotube and zinc oxide, for a high value (98%) of H 2 S removal in a bench-scale fixed bed reactor.…”

Section: Novel Use Of Als For Unpleasant Gas Purificationmentioning

confidence: 99%

Waterworks Sludge: An Underrated Material for Beneficial Reuse in Water and Environmental Engineering

Zhao

Nzihou

Ren

et al. 2020

Waste Biomass Valor

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Waterworks sludge refers to the inevitable suspended and dissolved solids produced during the water purification process when producing tap water where Al-salt and/or Fe-salt are used as coagulant worldwide. Waterworks sludge is dewatered and the resultant cakes have been treated as "waste" for landfill as their major final disposal solution for a long time in practice. As waterworks sludge is the residual of potable water treatment process, it is not harmful and without toxic elements such as heavy metals in most cases in comparison to sewage sludges for instance. Actually, waterworks sludge is an underrated material with huge potential for beneficial reuse as raw material in water and environmental engineering. However, little was significantly progressed on this topic until the last two decades. Research and development (R&D) with special interest and focus on waterworks sludge reuse was conducted in our group in the last 15 years and this paper reports and discusses the main work and its novel application profile. Overall, it is believed that the R&D of waterworks sludge is useful and will help to develop national strategy of the entire waterworks sludge management, allowing its transformation from a "waste" into value-added products, and thus contribute to sustainable development.

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Section: Novel Use Of Als For Unpleasant Gas Purificationmentioning

confidence: 99%

Waterworks Sludge: An Underrated Material for Beneficial Reuse in Water and Environmental Engineering

Zhao

Nzihou

Ren

et al. 2020

Waste Biomass Valor

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“…On 8 th to 10 th day retention time, the gas produced was colorless and later with some little faint smell like that of rotten egg but was not flammable. The gas extinguished an ignited match, the ability of the gas to extinguish light on ignition indicated the presence of Carbon dioxide (CO 2 ) in higher quantity which is inflammable but colorless and odorless as described by [18], [16], [24] while the rotten egg odor indicated the presence of H 2 S but in low quantity because if it were in higher quantity than CO 2 it would be combustible, for combustibility is one of the H 2 S characteristics as revealed by [23,20]. On the 10 th day retention time the Carbon dioxide production ceased; this marks the activation phase of methanogenic which produces burnable gas on 11 th day of the plant set up.…”

Section: Gas Production Using Combustibility Testmentioning

confidence: 99%

Comparative Study on the Rate of Flammability of Biogas and Firewood

Yusuf¹,

Ismail²,

Abdullahi³

2020

AJEE

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The increasing negative effects of hydro carbon fossil fuels on the environment has called for quest for alternative source of energy. Among the renewable energy sources, biogas has been evaluated as one of the most effective, efficient and environmentally benign sources of energy. This study evaluates the flammability of biogas produced from cow dung compared with firewood. The experiment was conducted batch wise in mixing ratio 1:1 at mesophilic temperature under 25 days retention time. Weighing balance was used to measure the cow dung and firewood. Biogas production and firewood flammability were measured using combustibility test in seconds using stopwatch. The total gas yield was burnt and recorded 5,088 seconds (1hour 24.8mins), on average 1kg of cow dung produces biogas that burns for 636 seconds (10.6mins), the gas burnt with clear blue flame revealing the effectiveness of water scrubbing method, while the 8kg of firewood was burnt 8,208 seconds (2hours 28mins). On average 1kg of wood fuel burns for 1,026 seconds (17.1 mins). Comparing the result in term of flammability and efficiency, Biogas could be used as waste management option, generate light and run vehicles and at the same time replace the use of firewood which produces toxic gases that are harmful to health, thus biogas is more efficient.

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“…Hydrogen sulfide is formed in sewage waters by sulfatereducing bacteria that can occur naturally in water [2][3][4]. As a rule, sulfate concentration in sewage waters corresponds to its content in tap water.…”

Section: Introductionmentioning

confidence: 99%

Complex Alumina‐Ferrous Coagulant for Effective Wastewater Purification from Hydrogen Sulfide

Kuldeyev

Tastanova

Bondarenko

et al. 2021

Advances in Materials Science and Engineering

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The article provides an overview of studies on the causes of the formation of hydrogen sulfide in anaerobic conditions of urban sewage systems and methods for neutralizing toxic reagent sulfur-containing compounds. It is noted that the presence of sulfur compounds and organic components in sewage flow leads to the formation and release of hydrogen sulfide into the atmosphere of settlements. Three main categories of methods for purifying sewage wastewater from hydrogen sulfide are presented. In this work, a complex alumina-ferrous coagulant has been developed from Kazakh raw materials. Based on natural ferruginous diatomite and middlings of sintered alumina, a complex alumina-ferrous coagulant has been synthesized, which is effective in purifying wastewater from hydrogen sulfide, accelerating the processes of sedimentation and clarification of sewage slurries. Experimental results also show that with the supply of increased amounts of coagulant, oil and oil films disappear from the surface of the cylinder, an almost complete purification of effluents from hydrogen sulfide compounds occurs, and the color of the liquid part is greatly reduced. In addition, the advantage of the developed reagent is that it is presented in the form of fine powder and can be easily dosed and added to a canalization pump station to interact with diluted hydrogen sulfide and be transported to sewage fields. Compared to other proposed methods in previous works, the reagent is suitable to be used directly in sewage systems such as sewage waters treatment plants and collectors to prevent hydrogen sulfide emission into the air atmosphere of populated areas, as well as at city sewage water treatment stations after air tanks and before secondary clarifiers to obtain better purified water suitable for watering agricultural plants.

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Current Status and Outlook of Odor Removal Technologies in Wastewater Treatment Plant

Cited by 69 publications

References 111 publications

Waterworks Sludge: An Underrated Material for Beneficial Reuse in Water and Environmental Engineering

Waterworks Sludge: An Underrated Material for Beneficial Reuse in Water and Environmental Engineering

Comparative Study on the Rate of Flammability of Biogas and Firewood

Complex Alumina‐Ferrous Coagulant for Effective Wastewater Purification from Hydrogen Sulfide

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