Explore chapters and articles related to this topic
Evaluation of underground pipeline construction options
Published in Mark Knight, Neil Thomson, Underground Infrastructure Research, 2020
S. Gokhale, M. Hastak, R. Vedder
Once the shafts are in place, the construction team aligns the PTSM machine using standard survey techniques. The PTSM machine pushes the pilot tube to within the specified tolerance (±30 mm) by displacing the soil. Because the pilot tube is rigid, the line and grade run true from start to finish with no high or low spots. Next the carrier pipe is introduced through the driving shaft, which in turn pushes out the pilot tube (Fig. 5). Cuttings are auger conveyed back through the carrier pipe to the drive shaft. A vacuum truck was used for the removal; transportation and disposal of the spoil, thereby keeping the job site clear of debris.
Centralized Treatment of Nonhazardous Wastes; An Alternative Means of Liquid Waste Disposal
Published in John M. Bell, Proceedings of the 43rd Industrial Waste Conference May 10, 11, 12, 1988, 1989
Mark W. Miller, M. Philip Lo, Suzanne S. Wienke, Jay G. Kremer
Traditionally, vacuum trucks have pumped the accumulated nonhazardous materials from the grease traps and interceptors and disposed them in a municipal landfill. However, as landfills stop accepting liquid wastes, industrial dischargers may be faced with more expensive and perhaps unnecessary disposal alternatives such as hauling the nonhazardous waste to a hazardous waste landfill. Dischargers may also resort to illegal disposal methods such as “midnight dumping,” or leave the traps and interceptors unmaintained. Therefore, it is clear that an alternative method of nonhazardous waste disposal is needed.
Air emission pollutants of different partial depth concrete bridge deck repair techniques: a comparative study
Published in Journal of Structural Integrity and Maintenance, 2023
Israi Abu Shanab, Andrew D. Sorensen
Water blasting requires the use of a vacuum truck to vacuum up waste materials post demolition. The working hours are taken as the same as the water blasting machine 44.85 hours. The truck reaches its capacity after 1.5 hours of water blasting machine work. As such, the truck will reach its full capacity five times. Once the truck is full, it has to stop working and leave the site to dump the wastewater. Assuming the dumping area is five miles away, the truck will travel a total of 300 miles. This task as well is represented using a HD Truck: combination Short-Haul CIDI-LS Diesel from the GREET model. Using Equation (1) and the emission factors from Table II, the emissions released from the vacuum truck are calculated and shown in Table 6. It should be noted here that the calculations included in this study do not include the environmental impact of treating the wastewater. This is a viable assumption if the wastewater is disposed of into a settling tank and allowed to evaporate. As such, only the remaining concrete waste is left and no wastewater treatment is required.
Testing restorative maintenance technologies for permeable interlocking concrete pavements
Published in Urban Water Journal, 2022
Jody Scott, Tahmineh Sarabian, Robert Bowers, Jennifer Drake
Cell 1 and 6 was restored by a pressurized-air and vacuum system, Typhoon® and Pavevac®, respectively, by Pavetech®. This maintenance technology was designed primarily for PICP use as the pressurized-air penetrates into the joints to remove all sediments and aggregates. The Typhoon® and Pavevac® are not stand-alone systems but must be connected to a high compressor trailer (1,379 kPa) and a vacuum truck, respectively. The Typhoon® has a circular blower head (0.74 m dia) that spins and allows the pressurized air (1,241 kPa), from the compressor trailer to dislodge the sediment and pavers’ joint material. The Pavevac® is a rectangular vacuum head attachment (0.71 m) that removes dislodged sediments and the remaining joint aggregate on the PICP surface. In this study, the vacuum truck operated at 1,400 RPM and 5000 CFM (at 28 inHg). A representative of Pavetech® operated this equipment.
Cross-country analysis of faecal sludge dewatering
Published in Environmental Technology, 2018
Moritz Gold, Hidenori Harada, Jean-David Therrien, Takahiro Nishida, Michael Cunningham, Swaib Semiyaga, Shigeo Fujii, Caetano Dorea, Viet-Anh Nguyen, Linda Strande
In Uganda, FS samples were collected from 16 lined pit latrines (Lined_UG), 13 septic tanks (Septic_UG) and 5 unlined pit latrines (Unlined_UG) in Kampala. Lined pit latrines are above or below ground, fully lined tanks, with no overflow or infiltration [27]. Unlined pit latrines are fully unlined, or partially lined tanks, and thus allow for groundwater inflow or FS infiltration and septic tanks were below ground, fully lined tanks, with an overflow [28]. Emptying frequencies are highly variable in Kampala, and the average frequency is not known. Lined_UG and Septic_UG samples were collected from vacuum trucks during discharge at Bugolobi Sewage Treatment Works, where FS was also treated with sewage. To obtain representative samples from each vacuum truck, approximately 1-L grab samples were collected four times during discharge and then mixed to one composite sample: once at the beginning, twice in the middle and once at the end. Unlined_UG samples were collected from manual FS collection service providers during discharge at Bugolobi Sewage Treatment Works. Approximately 8 L of grab samples were collected from the entire FS volume and mixed to one composite sample.