Experimental and modeling study of the long cylindrical oily sludge drying process

2015 ◽  
Vol 91 ◽  
pp. 354-362 ◽  
Author(s):  
Shuanghui Deng ◽  
Xuebin Wang ◽  
Houzhang Tan ◽  
Hrvoje Mikulčić ◽  
Zhifeng Li ◽  
...  
Keyword(s):  
Oily Sludge ◽  
Drying Process ◽  
Sludge Drying ◽  
Modeling Study

Masking agent efficiency on odor removal from WWTP sludge drying process

2018 ◽  
Author(s):  
F. Rousseille ◽  
A. Ventura
Keyword(s):  
Control Unit ◽  
Drying Process ◽  
Odor Control ◽  
Odor Concentration ◽  
Odor Removal ◽  
Masking Agents ◽  
Last Stage ◽  
Foul Odor ◽  
Sludge Drying ◽  
Dynamic Olfactometry

Abstract A study was executed in 2016 to determine the efficiency of two different neutralizers on odor perception from a sludge drying process. One of the products was injected by fogging system at the inlet of the odor control unit while the other was added directly to the washing solution of the last stage of the odor control unit, according to supplier recommendations. Performance evaluations encompassed complementary approaches including both sensorial analyses and analytical measures. Odor analyses were performed via dynamic olfactometry according to European Standard EN 13725 coupled with hedonic tone approach according to VDI 3882. Additional analyses on VOC emissions were conducted using gas chromatography screening. In parallel, several odor panels composed of site operators and plant neighbors carried out observations on the WWTP and its perimeter. The main conclusions of this study illustrates: • Only one test leads to a reduction of the odor concentration at the stack, • Overall, neither of the two masking agents significantly reduce the odor concentration at the stack, • The addition of masking agent seems to increase foul odor persistency, • The local odor panel observed no significant improvement in odor reduction within the environment around the WWTP.

scholarly journals Nitrification in Scrubber-Washed Wastewater of Sludge Drying Process by Expanded-Bed Activated Carbon Reactor.

1995 ◽  
Vol 18 (6) ◽  
pp. 489-498
Author(s):  
Fumitake NISHIMURA ◽  
Isao SOMIYA ◽  
Hiroshi TSUNO ◽  
Hideki IWABU
Keyword(s):  
Activated Carbon ◽  
Drying Process ◽  
Expanded Bed ◽  
Sludge Drying

scholarly journals Simulation for Sludge Flocculation I: Brownian Dynamic Simulation for Perikinetic Flocculation of Charged Particle

2012 ◽  
Vol 2012 ◽  
pp. 1-17
Author(s):  
Linshuang Liu ◽  
Guolu Yang ◽  
Minghui Yu
Keyword(s):  
Electrostatic Force ◽  
Radius Of Gyration ◽  
Brownian Dynamic ◽  
Drying Process ◽  
Floc Structure ◽  
Simulation Based ◽  
Primary Particles ◽  
High Turbidity ◽  
Sludge Drying ◽  
Original Cell

To investigate sludge drying process, a numerical simulation based on Brownian dynamic for the floc with uncharged and charged particles was conducted. The Langevin equation is used as dynamical equation for tracking each particle in a floc. An initial condition and periodic boundary condition which well conformed to reality is used for calculating the floc growth process. Each cell consists of 1000 primary particles with diameter 0.1 ∼ 4 μm. Floc growth is related to the thermal force and the electrostatic force. The electrostatic force on a particle in the simulation cell is considered as the sum of electrostatic forces from other particles in the original cell and its replicate cells. It is assumed that flocs are charged with precharged primary particles in dispersion system by ionization. By the analysis of the simulation figures, on one hand, the effects of initial particle size and sludge density on floc smashing time, floc radius of gyration, and fractal dimension were discussed. On the other hand, the effects of ionization on floc smashing time and floc structure were presented. This study has important practical value in the high-turbidity water treatment, especially for sludge drying.

Studies on Solar Drying of Oily Sludge

2012 ◽  
Vol 443-444 ◽  
pp. 54-59
Author(s):  
Lei Lei Mi ◽  
Nai Rui Liu ◽  
Ming Meng
Keyword(s):  
Water Content ◽  
Large Scale ◽  
Experimental Result ◽  
Oily Sludge ◽  
Solar Drying ◽  
Industrial Sludge ◽  
Solar Dryer ◽  
Drying Treatment ◽  
Sludge Drying ◽  
Dried Sludge

The overall objective of this study was to provide some references for large-scale drying treatment of particular industrial sludge such as oily sludge. Considering the features of oily sludge as well as the characteristics of solar drying, solar dryer was designed and established in order to conduct the sludge drying treatment under sealed and low-temperature condition. The major parts of solar dryer were air collector and drying chamber. Drying treatment of oily sludge after conditioning and dewatering was performed with the designed solar dryer. The main measurements were temperatures of major components of solar dryer and water content of sludge. The experimental result indicates that the water content of oily sludge can be decreased by a maximum of 18% in use of the designed solar dryer. It is also proposed that the emitted volatile hydrocarbon and alcohols be recycled and the dried sludge be incinerated.

Analysis the fry-drying process of oily sludge sample

2014 ◽  
Vol 92 (11) ◽  
pp. 2396-2403 ◽  
Author(s):  
Ke Zhang ◽  
Jianhua Zhu ◽  
Yong Zhou ◽  
Bencheng Wu
Keyword(s):  
Oily Sludge ◽  
Sludge Sample ◽  
Drying Process

Sewage sludge drying process integration with a waste-to-energy power plant

2015 ◽  
Vol 42 ◽  
pp. 159-165 ◽  
Author(s):  
A. Bianchini ◽  
L. Bonfiglioli ◽  
M. Pellegrini ◽  
C. Saccani
Keyword(s):  
Power Plant ◽  
Sewage Sludge ◽  
Process Integration ◽  
Waste To Energy ◽  
Drying Process ◽  
Sludge Drying

scholarly journals Investigation of the effects of temperature and sludge characteristics on odors and VOC emissions during the drying process of sewage sludge

2015 ◽  
Vol 72 (4) ◽  
pp. 543-552 ◽  
Author(s):  
Wenjie Ding ◽  
Lin Li ◽  
Junxin Liu
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Wastewater Treatment Plants ◽  
Scientific Data ◽  
Gas Chromatography Mass Spectrometry ◽  
Drying Process ◽  
Drying Temperature ◽  
Volatile Organic ◽  
Sludge Drying ◽  
Total Volatile Organic Compounds

Sludge drying is a necessary step for sludge disposal. In this study, sludge was collected from two wastewater treatment plants, and dried at different temperatures in the laboratory. The emission of odor and total volatile organic compounds (TVOCs) during the sludge drying process were determined by an online odor monitoring system. The volatile organic compounds (VOCs) in off-gas were analyzed by gas chromatography–mass spectrometry. Results showed that sludge with 30% moisture content could be obtained in 51 minutes under drying temperature 100 °C but only within 27 minutes under 150 °C. Concentration of odor, TVOCs, sulfur-containing compounds (SCCs), and amines were changed with drying temperature and sludge sources. The maximum concentration of odor, TVOCs, SCCs, and amines were 503.13 ppm, 3.01 ppm, 8.15 ppm, and 11.27 ppm, respectively, at drying temperature 100 °C. These values reached 1,250.79, 8.10, 53.51, and 37.80 ppm when sludge dried at 150 °C. Odor concentration had a close relationship with emission of SCCs, amines, and TVOCs. The main VOCs released were benzene series and organic acid. Potential migration of substances in sludge was examined via analysis of off-gas and condensate, aiming to provide scientific data for effective sludge treatment and off-gas control.

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