The invention discloses a
wastewater treatment method for synchronously removing organic matters,
sulfate radicals,
heavy metals and
total nitrogen. The method comprises the following steps that: production
wastewater enters an anaerobic tank, organic matters are used as
electron donors, and SO4<2-> in the production
wastewater is reduced by
sulfate reducing
bacteria; the wastewater flows into thereaction tank again, S2- reacts with heavy
metal ions in the wastewater to generate insoluble
metal sulfide, and a coagulation reaction is carried out; the wastewater flows into a
sedimentation tankfor
solid-liquid separation, and
metal sulfide in the wastewater is removed through
sedimentation; the wastewater is flown into an anoxic tank, wherein
thiobacillus denitrificans performs autotrophicdenitrification
nitrogen removal by utilizing residual S2-, S and SO3<2->; and the wastewater flows into the aerobic tank, and aerobic
denitrifying bacteria in the wastewater perform
aerobic denitrification by utilizing residual organic matters in the wastewater to further remove
nitrogen. According to the method, the
energy consumption can be reduced by 30%-50%, the
sludge generation amount can be reduced by 30%-40%, the manual operation amount can be reduced, and the method conforms to the development trend of treating waste with waste in future
sewage treatment.