Merck
  • Home
  • Search Results
  • Alkali-solubilized organic matter from sludge and its degradability in the anaerobic process.

Alkali-solubilized organic matter from sludge and its degradability in the anaerobic process.

Bioresource technology (2015-11-08)
Dongzhe Li, Yan Zhou, Youming Tan, Santosh Pathak, Maszenan Bin Abdul Majid, Wun Jern Ng
ABSTRACT

This study investigates alkali-solubilized dissolved organic matter (DOM) and its fate in the anaerobic treatment process. DOM was fractionated into high molecular weight (HMW) protein-like substances (PL), HMW saccharide-like substances (SL), low molecular weight (LMW) PL, LMW SL, and humic acid-like substances (HAL). The results indicate alkali-solubilized DOM is primarily composed of LMW PL, HMW SL, and HAL. Alkaline pretreatment improved the overall anaerobic degradability of DOM in sludge (removal efficiency of total DOM increased by 28.4%). However, certain DOM fractions (mainly HMW PL and HAL) exhibited low degradability during anaerobic treatment, primarily caused by the low degradability of aromatic groups (such as aromatic amine groups from tryptophan-like PL). Alkaline pretreatment also resulted in an increase of residual DOM, which is mainly composed of HAL (52.9%) and HMW SL (49.9%).

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Potassium bromide, BioXtra, ≥99.0%
Sigma-Aldrich
Potassium bromide, BioUltra, ≥99.5% (AT)
Sigma-Aldrich
Potassium bromide, anhydrous, powder, 99.999% trace metals basis
Sigma-Aldrich
Potassium bromide, anhydrous, powder, 99.95% trace metals basis
Sigma-Aldrich
Potassium bromide, anhydrous, free-flowing, Redi-Dri, ACS reagent, ≥99%
Sigma-Aldrich
Potassium bromide, FT-IR grade, ≥99% trace metals basis
Sigma-Aldrich
Potassium bromide, anhydrous, free-flowing, Redi-Dri, ReagentPlus®, ≥99%
Sigma-Aldrich
Potassium bromide, ReagentPlus®, ≥99.0%
Sigma-Aldrich
Potassium bromide, ACS reagent, ≥99.0%
Sigma-Aldrich
Acetonitrile, for DNA synthesis
Sigma-Aldrich
Ultrapure Acetonitrile, for DNA synthesis
Sigma-Aldrich
Acetonitrile, configured for PerkinElmer 8900, configured for Polygen, for DNA synthesis
Sigma-Aldrich
Acetonitrile, electronic grade, 99.999% trace metals basis
Sigma-Aldrich
Trifluoroacetic acid, ReagentPlus®, 99%
Sigma-Aldrich
Acetonitrile
Sigma-Aldrich
Acetonitrile, suitable for DNA synthesis, ≥99.9% (GC)
Sigma-Aldrich
Acetonitrile, biotech. grade, ≥99.93%
Sigma-Aldrich
Acetonitrile, ReagentPlus®, 99%
Sigma-Aldrich
Acetonitrile, ACS reagent, ≥99.5%
Sigma-Aldrich
Acetonitrile, ≥99.5% (GC)
Sigma-Aldrich
Acetonitrile, for preparative HPLC, ≥99.8% (GC)
Sigma-Aldrich
Trifluoroacetic acid, puriss. p.a., suitable for HPLC, ≥99.0% (GC)
Sigma-Aldrich
Acetonitrile, puriss. p.a., ACS reagent, reag. Ph. Eur., ≥99.5% (GC)
Sigma-Aldrich
Trifluoroacetic acid, ≥99%, for protein sequencing
Sigma-Aldrich
Ultrapure Acetonitrile
Sigma-Aldrich
Acetonitrile, anhydrous, 99.8%
Sigma-Aldrich
Acetonitrile, for DNA synthesis