Current of water environment situation and technologies for wastewater treatment at Sichuan Province

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????????????????? Current of water environment
situation and technologies for wastewater
treatment at Sichuan Province ?????? ??? ?
? Professor Yongsheng Fu Southwest Jiaotong
University
2

• ????????????
• Status of Sichuan provincial water
  quality

1. ?????,??????? 1?Lack of water resource,
and the distribution is unequal.
????????????????????????????????2783m³???,????????
???1353m³,?????????????16171m³???????????????????(
50704m³)????(46476m³)????(8168m³)????(5448m³)????(
3620m³)?????(3218m³)??15?????????????????????????
???400500m³? Sichuan Provincial water
resource reflects a remarkable feature that its
temporal-spatial distribution is highly uneven.
The provincial occupancy volume of water resource
per capita is 2783 cubic meter, in which the
eastern basin is 1353 cubic meter, the western
plateau is 16171 cubic meter. The cities, with
the volume of water resource per capita higher
than the average values are Aba (50704m³), Gan
Zi (46476m³), Yaan (8168m³), Liangshan (5448m³),
Guang Yuan (3620m³), Pan Zhihua (3218m³). Other
15 cities volume of water resource per capita
are lower than the average value. The lowest is
400500m³
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• 2?????????,??????????
• 2?The water quality of big rivers is tolerable,
  but many small rivers are worsen.

????? Yangtze River
???????? Mangxi River
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3???????????,??????? 3?Water quality for lake and
reservoir is fair, which is difficult to
maintain.

???? Shuangxi reservoir
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• 4? ??????,????????????,??????????(??220???????????
  35???GDP)
• 4?Industrial wastewater will be continuously
  increasing, with the economic development,
  especially with many constructed industrial parks
  , e.g. 220 planned industrial parks will
  undertake 3 to 5 billion GDP .

????????? Meishan Chemical industrial park
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5?????????????,??????????192240.95?????CODcr?NH3-N
???????610360.4 ??78572.87 ??????????359.67??????
???,???,??????????? 5?The urban pollutant
discharge is prominent, the total amount of
wastewater is 192.24 million tonnes. With
emissions of CODcr and NH3-N 610360.4 and
78572.87 tonnes annually. The maximum daily
amount of sewage treatment is 359.67 tonne. The
total amount of discharge is quite huge with its
quantity generating fast and low level for
treatment.
????????,????????40?m³ ,???5.6??,??463? San
Wayao Sewage Treatment Plant , with daily
capacity of treatment 4 hundred thousand cubic
meters, total investment 560 million Yuan,
covering about 463 acres.
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• 6????????????
• 6?Great effects of agricultural pollution with
  non-point source
• ??????????????(19?m3)?????(?1.5?????)?????(
  ??220?????6??)????????????????????CODcr?NH3-N?????
  ??54.93???5.87???
• The pollution source from rural
  sewage(1.9 billion m3), wastewater of poultry
  breeding(150 million equivalent pigs),
  pesticides(60 thousand tonnes), fertilizers(2.2
  million tonnes) etc. Wastewater of poultry
  breeding is a major component of the agricultural
  pollution.With emissions of CODcr and NH3-N
  549,300 and 58,700 tonnes annually.

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• ????????????
• Overview of Sichuan Provincial
  wastewater treatment
• 1??????????
• 1?Treatment of industrial wastewater
• (1)???? For individual industry
• ???????,?????????????????????????-????
  ,??????????ABR?UASB?IC??AO?????????????SBR?CASS???
  ???????????????????????
• The selection of treatment processes
  is according to the feature of industrial
  enterprises, e.g. aerobic, anaerobic, aerobic
  integrated with anaerobic, physic-chemical, ABR,
  UASB, IC, AO, conventional activated sludge,
  oxidation ditch, SBR, CASS, membrane reactor,
  fluidized bed, magnetic separation technology.
• (2)???? For industrial parks
• ??????????????????????A?????????????????
  ?????????????A2/O?SBR????????????
• The selection of treatment technology
  is according to the requirement of achieving
  discharge standard. To reach A level and first
  discharging class, membrane reactor is
  recommended. To achieve the first discharging
  class, A2/O, SBR, oxidation ditch, activated
  sludge are recommended.

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• 2??????????
• 2?Technology for sanitary sewage
• (1)???? For large and medium-sized city
• A2/O??????????????AOE?UNITAK?SBR???????
  ?89?????????,SBR?????42??????22BAF???17
  A2/O???12???7?
• A2/O, Oxidation ditch, Integrated
  oxidation ditch, AOE, UNITAK, SBR, Bio-filter
  etc. According to the statistic of 89 sewage
  plant process, SBR accounts for 42, oxidation
  ditch is 22, BAF is 17, A2/O is 12 and the
  other is 7.
• (2)?? For towns
• ?????????????SBR??????????????????
• Contact oxidation, conventional
  activated sludge process, SBR, manually filtering
  system, fluidized bed, constructed wetlands etc.
• (3)????? For Villages and individual investors
• ??????????????
• Septic tank, biogas digesters,
  constructed wetlands

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• 3?????
• 3?Wastewater of poultry breeding
• (1)??????????
• Method of ecological balance planting combined
  with breeding
• ????????????????????????,????????
• This method aims at using resources in
  a circular way, not only generating economic
  benefits, but also reducing pollution.

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• (2)???????
• Technology of ecological farming bed
  pig-on-litter (POL) system
• ?????????????????????????????
• It is an environmental friendly
  technology, but the sanitary condition needs to
  be improved.

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• (3)??????
• Technology of end of pipe treatment
• ????UASB? IC?????????? ?????????
• Anaerobic treatment UASB, IC, methane
  fermentation and power generation technology,
  anaerobic ammonia nitrogen
• ????SBR????? A2/O?CASS?
• Aerobic treatment SBR, Oxidation ditch,
  A2/O, CASS

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• ????????
• Future Technology Needs
• 1????????????????
• 1?Treatment technology for small watershed,
  lake and reservoir, water body of landscape
• ???????
  ???????
• Application of microbial bacteria
  Ecological floating bed

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• 2????????????????
• 2?Wastewater treatment and reuse technology for
  industry park

????????? Wastewater treatment plant
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• 3????????????????????
• 3?Special technology for wastewater treatment
  with high concentration, hardly degradable, toxic
  organics
• ????????????????????????
• Wastewater from Chemical,
  pharmaceutical, printing and dyeing industries,
  leachate, pesticides etc,.

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• ????!
• Thanks for your attention!