scholarly journals Experimental Study on the Influencing Factors of Treatment of Landfill Sludge Using Vacuum Preloading with the Fenton Reagent

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Yajun Wu ◽  
Binjie Song ◽  
Yitian Lu ◽  
Qingyang Deng ◽  
Guang Chen
Keyword(s):  
Experimental Study ◽  
Shear Strength ◽  
Test Group ◽  
Fenton Reagent ◽  
Optimum Ratio ◽  
Vacuum Preloading ◽  
Technical Parameters ◽  
Total Displacement ◽  
Board Type ◽  
Vertical Drainage

At present, there is a lack of necessary technical parameters for sludge vacuum reinforcement. To explore the effects of the drain board type on sludge vacuum reinforcement, the Fenton reagent was used to pretreat the landfill sludge in a sludge landfill area in Shanghai, and then, vacuum preloading contrast tests of different prefabricated vertical drainage types were carried out. During the test, the discharge and settlement of sludge were recorded. After the test, the moisture content, shear strength, and appearance of PVD were measured and analysed. The main conclusions are as follows: (1) the optimum ratio of H2O2 and Fe2+ is 2 for the landfill sludge; (2) the total displacement and accumulated settlement of the test group with integral prefabricated vertical drainage are 1.7 times and 1.2 times those of the separate prefabricated vertical drainage, respectively; (3) the type of prefabricated vertical drainage has no effect on the distribution of water content and shear strength; and (4) when the sludge is vacuum strengthened, the integral prefabricated vertical drainage should be preferred.

scholarly journals Shortening of bones using novel contraction osteogenesis device: An experimental study

2021 ◽  
Vol 11 (Suppl. 1) ◽  
pp. 26-31
Author(s):  
Hakan Ocak ◽  
Erdem Kılıç ◽  
Alper Alkan
Keyword(s):  
Experimental Study ◽  
Maxillofacial Surgery ◽  
Latency Period ◽  
Test Group ◽  
Study Groups ◽  
Skin Incision ◽  
Alternative Methods ◽  
Control Group ◽  
Oral And Maxillofacial Surgery ◽  
Complication Rates

Aim: Given the high complication rates associated with orthognathic surgery for the correction of maxillomandibular malformations, studies have focused on alternative methods of strengthening the jaw, such as distraction osteogenesis. However, methods of shortening of the jaw are not well-elucidated in oral and maxillofacial surgery practice. This study aims to investigate the efficacy of a new method of shortening osteotomized jaws. Methodology: A 2.5–3 cm skin incision was made on the left tibia of each of 15 New Zealand white rabbits aged 12–18 months, followed by fixation of 15 mm pre-opened distractor devices to the tibia after osteotomy. After a five-day latency period, the distractors were activated to a total of 8 mm, with closure of the device set at a rate of 0.25 mm/day in the test group. After a five-day latency period, the distractors closed at a rate of 0.125 mm/day, achieving a total contraction of 5 mm. The distractors were not activated in the control group. The bone at the contraction range was evaluated, and the resultant shortening was measured. Results: The tibia was shortened by an average of 4.32 mm. Exaggerated bone formation was identified around the osteotomized cortical bone in all rabbits in the control and study groups, and there were minimal complication rates. Conclusion: This study verified that the jaw can be shortened by performing slow, controlled contraction with a bone resorption pattern.   How to cite this article: Ocak H, Kılıç E. Alkan A, Shortening of the bones using a novel contraction osteogenesis device: An experimental study. Int Dent Res 2021;11(Suppl.1):26-31. https://doi.org/10.5577/intdentres.2021.vol11.suppl1.5   Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.

Sign in / Sign up

Export Citation Format

Share Document