Domestic Wastewater

Abstract

Municipal  wastewater  was  formed  from  many  activities.  Therefore  it  caused  various  different  characteristics  of  wastewater.  The  wastewater  collection  system  was  divided  into  2  types:  the  combined  pipe  system, which  was  a  system  that  shares  sewer  and  rainwater  together.  Wastewater  and  rainwater  were  sent  to  the  wastewater  treatment  system  before  being  released  into  natural  water  sources  and  separate  piping  systems  was  a  system  that  separates  wastewater  and  rainwater  pipes.  So  there  was  only  the  wastewater  sent  to  the  wastewater  treatment  system.

In  Thailand, there  were  101  wastewater  treatment  plants  under  the  supervision  of  a  governing  organization.  They  were  87  local  municipalities, 1  provincial  administrative  organization, 2  sub-district  administrative  organizations, 2  cities  in  Pattaya, 1  Samut  Prakan  province  and  8  Bangkok  Metropolis.  The  total  wastewater  treatment  system  that  local  government  organizations  used  in  Thailand  were  the  Bo  Pang  Treatment  System  (Oxidation  pond)  because  it  was  a  treatment  system  that  could  be  operated  easily, not  complicated  and  it  did  not  need  to  use  the  machine  to  operate  the  system.  But  it  needed  a  lot  of  space  to  build  a  treatment  pond.  The  second  most  popular  wastewater  treatment  system  was  the  Oxidation  Ditch  (OD)  which  had  high  treatment  efficiency  and  it  could  effectively  treat  nitrogen  compounds.  But  it  had  a  high  cost  of  construction  and  operation.  Moreover  it  took  more  space  than  other  types  of  accelerated  sediment  systems.  And  the  system  administrator  must  have  a  good  understanding  of  the  whole  system.