Download Pollution Control and Resource Recovery for Sewage Sludge by Zhao Youcai, Zhen Guangyin PDF

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By Zhao Youcai, Zhen Guangyin

Pollution keep an eye on and source restoration: Sewage Sludge discusses a number of conventional and new environmentally pleasant applied sciences for sewage sludge remedy and disposal. additionally, the booklet covers more than a few new projects which are underway to advertise and speed up the improvement of similar sciences and techniques.

The book's authors builds a framework for constructing numerous sustainable applied sciences for sewage sludge remedy and disposal, together with complicated dewatering via chemical conditioning, solidification/stabilization, reuse for the improvement of development and construction fabrics, anaerobic bioenergy restoration, sanitary landfill, and scent control.

  • Explains environmentally pleasant applied sciences for sewage sludge therapy and disposal, together with complicated dewatering via chemical conditioning, solidification/stabilization, and anaerobic bioenergy recovery
  • Includes worthy guidance for engineers to deal with sludge matters, reminiscent of sanitary landfill and scent control
  • Presents new advancements and methods which are at the horizon

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Example text

The rapid decrease in the metabolic activity confirmed À Á 2À that FeðIIÞ À S2 O8 oxidation improved sludge dewaterability principally via the degradation of EPS and rupture of cells. This resulted in the release of intracellular materials in sludge cells, most of which could be degraded by excess SO4 À , also large quantities of water of hydration bound inside the sludge cells was released into the free water, which promoted sludge-dewatering characteristics. 4 EEM Spectra of Different EPS Fractions Three-dimensional excitation-emission matrix (EEM) fluorescence spectroscopy is a rapid and sensitive technique.

The third peak, identified at the Ex/Em of 275/425e435 nm (Peak C), and the fourth peak observed at the Ex/Em of around 340/420e435 nm (Peak D) were regarded as visible humic- and fulvic-like fluorescence, respectively. For the raw sludge sample 3 from the special WWTP, the Peaks C and D located at the Ex/Em of 275/425e435 nm and 340/420e435 nm were absent in the EEM spectra. Two main peaks could be readily identified from Fig. 17C. The first peak was located at the Ex/Em of 225/ 345e355 nm (Peak A) while the second peak was found at the Ex/Em of 280/335 nm (Peak B).

It revealed that in soluble- and LB- as well as TB-EPS fractions, aromatic protein-, tryptophan protein-, humic- and fulvic-like substances together affected sludge dewaterability. These investigations obviously implied that the enhanced dewaterability of sludge flocs in this study was closely related to the degradation and removal of the fluorescence componentsÁ in sludge EPS. À À  The powerful oxidation of SO4 from FeðIIÞ À S2 O8 2À system actually destroyed the particular functional groups of fluorescing substances present in sludge EPS and caused cleavage of linkages in the polymeric backbone, thereby inducing the release of EPS-bound water, intercellular materials and water of hydration inside microbial cells, and subsequent enhancement of sludge dewaterability.

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