Discharge of sludge from water works into waters will result in the increased deterioration of water environment. Therefore, an experimental study was conducted on the addition of conditioning agent to improve sludge dewatering performance. The result shows that coagulation is inadaptable to the treatment of sludge from water works and use of powdered coal ash from power plant as conditioning a...

The effects of the cationic surfactant (cationic cetyl trimethyl ammonium bromide, CTAB) on the improvement of the sludge dewaterability using the cationic flocculant (cationic polyacrylamide, CPAM) were analyzed. Residual turbidity of supernatant, dry solid (DS) content, extracellular polymeric substances (EPS), specific resistance to filtration (SRF), zeta potential, floc size, and settling r...

Abstract The paper analyzes two types of alloyed cast iron used for pump impellers operated in mine working conditions. research on corrosion resistance grades resistant to abrasive wear was presented. Tests were performed chromium (HCCI) grade EN-GJN HV600 (XCr18) (acc. EN 12513) and high-silicon HSCI Grade 1 ASTM A 518/ 518M - 99). Deposit mining is characterized by variable Both are suitable...

sarcheshmeh copper mine, with the final reserves of 828 million tons of sulfur ore and average grade of 0.74%, is known to be the largest open pit of iran and most probably the second largest copper mine in the world. this mine is located in the seismotectonic zone of central-iran, and 23 km away from the 150 km long rafsanjan active fault.in this study the vulnerability of the west wall of the...

The design of geotextile containers for dewatering applications typically requires hydraulic compatibility between the geotextile and the confined fill material. Ideally, a geotextile container must successfully retain the solid phase of the fill material and must not be clogged during the dewatering process. This becomes difficult to achieve when the fill material is fine grained and the pore ...

Swine production in North Carolina is second only to Iowa of hogs on farms (Graham, 1995) with 8.3 million head. Cash receipts from 1994 salts exceeded 980 million dollars representing 15.4 percent of total agricultural cash receipts. Using the underfloor flush-lagoon treatment system ofmanure management is reported to produce 950 gallons per year per pig capacity for growing-finishing operatio...

The design of geotextile containers for dewatering applications typically requires good retention of the confined fill material solids. This becomes difficult to achieve when the fill material is fine grained and the pore openings are large. Furthermore, the proper retention becomes critical if the confined material is contaminated. Fly ash is one of the fine-grained geomaterials that exhibit b...

Dewatering of sediments natural water treatment plants is one the most important technological and environmental problems their operation. The use drying in conditions ensures low energy consumption with achievement necessary results moisture content sediment. increase rate dehydration facilitated by structures using capillary effect to dehydration. designs dewatering sites such elements have b...