Summary of the invention
Technical problem: the objective of the invention is to overcome the weak point in the prior art, provide a kind of energy consumption little, floor space is little, the sequence batch (biological dephosphorize denitrification technology that running cost is low.
Technical scheme: sequence batch (biological dephosphorize denitrification technology of the present invention, comprise and utilize not aeration tank and aeration tank to carry out anaerobism, anoxic and aerobic biological treatment, also comprise the steps:
A. in the aeration tank in the aeration, one batch sewage is fed not in the aeration tank, and never discharge supernatant liquor in the aeration tank;
B. when one batch sewage all enters not the aeration tank, stop the aeration in the aeration tank, with the muddy water mixed solution in the aeration tank and not the muddy water mixed solution in the aeration tank mix;
C. stop muddy water mixed solution and the not mixing of the muddy water mixed solution in the aeration tank in the aeration tank, carry out the aeration in the aeration tank once more, the muddy water mixed solution in the aeration tank does not carry out mud-water separation simultaneously;
D. repeating step a, b, c finish the next batch sewage disposal.
Described with the muddy water mixed solution in the aeration tank and not the muddy water mixed solution in the aeration tank to carry out the blended time be 0.01~10 hour; The described while, the time of carrying out mud-water separation of the muddy water mixed solution in the aeration tank was not 0~6 hour; Described aeration tank and not the aeration tank build jointly or divide and build.
Beneficial effect: the present invention makes full use of limited carbon source in conjunction with the advantage of method for biologically treating wastewater and sequence bioreactor, has improved the utilization ratio of carbon source in the wastewater treatment, has solved the insufficient problem of carbon source in the wastewater biological dephosphorization effectively.The mixing of the muddy water mixed solution in the Inlet and outlet water at intermittence by aeration tank not, the intermittent aeration of aeration tank and two ponds, do not make successively anaerobic state, anoxic condition, mud-water separation to occur in the aeration tank, successively occurred oxygen condition, anoxic condition, good oxygen condition in the aeration tank.Sewage directly enters the not aeration tank that is in anaerobic state, and limited carbon source is preferentially supplied with polyP bacteria, helps the dephosphorization of system; Muddy water mixed solution is not circulating between aeration tank and the aeration tank, and Liang Chijun is in anoxic condition, helps forming denitrification dephosphorization under anoxia condition, and denitrification denitrogenation and 2 self-contained process of suction phosphorus are united two into one, and a carbon is dual-purpose; The muddy water mixed solution in the aeration tank does not carry out mud-water separation, in the mud-water separation process, continues to finish anti-nitration reaction, reduces nitrite nitrogen and nitric nitrogen in returned sluge and the water outlet; When the muddy water mixed solution in the aeration tank did not carry out mud-water separation, its coprecipitation mode was for staticly settling, and sedimentation function is good, and effluent quality is excellent.The present invention need not second pond, and no mud refluxes and internal reflux, has saved mud and has refluxed and the internal reflux device, from many-sides such as civilwork engineering quantity, equipment costs, has saved construction investment greatly, and has saved working cost.Have save that aeration rate, required carbon source are less, construction and advantage such as working cost is low, floor space is little, solved because of carbon source on the low side, carbon, nitrogen, phosphorus ratio imbalance, and be difficult to realize the handling problem of the sewage of highly effective dephosphorizing denitrification.
Embodiment
The embodiments of the invention of becoming a partner below are further described:
Sequence batch (biological dephosphorize denitrification technology of the present invention utilizes not aeration tank and aeration tank to carry out anaerobism, anoxic and aerobic biological treatment, the aeration tank and not the aeration tank build jointly or divide and build.In the aeration tank, in the aeration, one batch sewage feeding is in the not aeration tank of anaerobic state, and never discharges supernatant liquor in the aeration tank; When one batch sewage all enters not the aeration tank, stop the aeration in the aeration tank, with the muddy water mixed solution in the aeration tank and not the muddy water mixed solution in the aeration tank mix, make the aeration tank and not two ponds, aeration tank all be in anoxic condition, muddy water mixed solution in the aeration tank and not the muddy water mixed solution blended time in the aeration tank require to determine according to sewage quality and effluent quality, be generally 0.01~10 hour; Stop muddy water mixed solution and the not mixing of the muddy water mixed solution in the aeration tank in the aeration tank afterwards, carry out the aeration in the aeration tank once more, simultaneously the muddy water mixed solution in the aeration tank does not carry out mud-water separation, and the time of mud-water separation is 0~6 hour, finishes one batch sewage disposal; Repeat said process, finish the sewage disposal of next batch, and regularly discharge excess sludge.In order to improve the concentration of the microorganism in the sequence batch (biological dephosphorize denitrification technology, realize better dephosphorization and denitrification effect, in not aeration tank and aeration tank, can be added to biofilm development the filler that adheres to medium is provided.