PMID- 30929568
OWN - NLM
STAT- MEDLINE
DCOM- 20190807
LR  - 20221207
IS  - 1532-4117 (Electronic)
IS  - 1093-4529 (Linking)
VI  - 54
IP  - 8
DP  - 2019
TI  - Improvement of nutrients removal from domestic wastewater by activated-sludge 
      encapsulation with polyvinyl alcohol (PVA).
PG  - 721-727
LID - 10.1080/10934529.2019.1592526 [doi]
AB  - Conventional activated-sludge (AS) technologies are deficient for nutrient 
      removal because they require specific floc characteristics. Therefore, the 
      encapsulated AS with polyvinyl alcohol (PVA) will favor floc's formation that 
      removes nutrients. The applied method was based on monitoring the removal of 
      organic matter and nutrients (NH(4)(+), NO(3)(-), NO(2)(-), PO(4)(3-)) from 
      synthetic domestic wastewater using laboratory-scale AS. The experimental 
      reactors were operated at 8 h as optimized Hydraulic Retention Time (HRT). The 
      sludge characteristics evaluation was carried out through the Sludge Volumetric 
      Index (SVI), Food/Microorganism ratio (F/M), and Mixed Liquor Volatile Suspended 
      Solids (MLVSS). Other specific floc characteristics, such as zeta potential and 
      effective diameter were also evaluated. The results showed that the encapsulated 
      AS with PVA favors nitrogen and phosphorous removal up to 35% but it did not 
      improve organic matter removal. In addition, encapsulated AS with PVA has the 
      characteristics of filamentous sludge (F/M: 0.7 g COD g(-1) MLVSS d(-1)) with 
      good settleability conditions (SVI: 43 mL g(-1) MLSVS h(-1)) and low zeta 
      potential (ZP: -0.9 mV), which favors its separation from the liquid phase. In 
      conclusion, the encapsulation of AS with PVA improves nutrient removal by 
      improving floc characteristics.
FAU - Guerrero, Jennifer A
AU  - Guerrero JA
AD  - a Ingenieria en Biotecnologia, Facultad de Ingenierias y Ciencias Agropecuarias , 
      Universidad de las Americas , Quito , Ecuador.
FAU - Almeida-Naranjo, Cristina E
AU  - Almeida-Naranjo CE
AD  - b Departamento de Ingenieria Mecanica, Facultad de Ingenieria Mecanicca, Escuela 
      Politecnica Nacional , Quito , Ecuador.
FAU - Villamar Ayala, Cristina Alejandra
AU  - Villamar Ayala CA
AUID- ORCID: 0000-0003-4654-0670
AD  - c Departamento de Ingenieria en Obras Civiles, Facultad de Ingenieria , 
      Universidad de Santiago de Chile , Santiago , Chile.
LA  - eng
PT  - Journal Article
DEP - 20190330
PL  - England
TA  - J Environ Sci Health A Tox Hazard Subst Environ Eng
JT  - Journal of environmental science and health. Part A, Toxic/hazardous substances & 
      environmental engineering
JID - 9812551
RN  - 0 (Sewage)
RN  - 0 (Waste Water)
RN  - 27YLU75U4W (Phosphorus)
RN  - 9002-89-5 (Polyvinyl Alcohol)
RN  - N762921K75 (Nitrogen)
MH  - Bioreactors/microbiology
MH  - Cities
MH  - Drug Compounding/methods
MH  - Humans
MH  - Nitrogen/isolation & purification/pharmacokinetics
MH  - Nutrients/*isolation & purification
MH  - Phosphorus/isolation & purification/pharmacokinetics
MH  - Polyvinyl Alcohol/chemistry/*pharmacokinetics
MH  - Residence Characteristics
MH  - Sewage/*chemistry
MH  - Waste Disposal, Fluid/*methods
MH  - Wastewater/*chemistry
MH  - Water Purification/methods
OTO - NOTNLM
OT  - Activated sludge
OT  - PVA
OT  - floc characteristics
OT  - nutrients
OT  - synthetic domestic wastewater
EDAT- 2019/04/02 06:00
MHDA- 2019/08/08 06:00
CRDT- 2019/04/02 06:00
PHST- 2019/04/02 06:00 [pubmed]
PHST- 2019/08/08 06:00 [medline]
PHST- 2019/04/02 06:00 [entrez]
AID - 10.1080/10934529.2019.1592526 [doi]
PST - ppublish
SO  - J Environ Sci Health A Tox Hazard Subst Environ Eng. 2019;54(8):721-727. doi: 
      10.1080/10934529.2019.1592526. Epub 2019 Mar 30.