In recent years, below national attention, environmental protection sewage disposal more and more get attention. Here market demand falls, increasing enterprise, capital may be pure and devoted sewage finishing in this a group of people of same interest. So rare clean environmental protection amounts to mark to discharge besides help company sewage disposal, still offer a technology to support at the same time; I am told today tell the sewage disposal COD that everybody is paying close attention to to rise tall reason ~ suddenly
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Sewage disposal COD lifts suddenly, what reason to have? Did you want to be opposite? See you guess so?
If be the reason that 2 deep pools give the COD of water and BOD to lift suddenly, that reflected the trouble of sewage disposal, have exterior reason, also internal matter causes functional trouble, want classification of very harmful material.
Identify its feature, should determine above all COD giving water; Water COD and BOD5 go out to be worth elevatory phenomenon in analysing sewage disposal, great majority is caused by grain form substance or material of dissolvability chemical combination, have the reason that a variety of methods can decide to its arise.
The COD in technology of activated sludge processing gives water to be worth elevatory reason 1
Can inspect degree of too small account, should dive wall hind or big garrulous appears to coagulate in giving aqueduct content, or when 2 deep pools medium but diopter small or when reducing, cause by suspension solid, should give water but diopter under 1.5 meters when, cause by dissolvability sewage inclusion. Bear of surface of 2 deep pools is exorbitant, content of the solid in activated sludge is exorbitant, must notice: right now? Inside hour of?4 of throat of of Qin of Xie of Nai of instrument of Di of plutonium dizzy Xie reduce a value to must not exceed 25% , and because the in take out and causing a water NH4 +N content of odd mud is elevatory,must avoid.
The COD in technology of activated sludge processing gives water to be worth elevatory reason 2
Mud index is exorbitant, fall than sufficient condition in circumfluence, when the water deepness of clear water area is less than 1 meter, and mud index exceeds 150ml/g when, must adopt measure to improve mud index. Circumfluence is smaller than passing, circumfluence comparing is influent 50-70% at least. RV ＜ 0.5 (＝ 50% ) the slimy face height that → raises the → of capacity of returns of activated sludge to transform 2 deep pools. If slimy face was not reduced, check Q of mud cubage bear.
The COD in technology of activated sludge processing gives water to be worth elevatory reason 3
Garrulous coagulates body is broken, can bring about the high concentration that material can filter in giving water, (＞ 30mg/L or 12TE/F) , divide tolerance inadequacy, aeriform formation, the retention period of the mud in 2 deep pools is too long. Phreatic water wall and floater purify lead short of result. Difference of temperature of water of pass in and out of 2 deep pools is too little. Pipeline jams. Bear of the COD that drink water is exorbitant.
The COD in technology of activated sludge processing gives water to be worth elevatory reason 4
Cost of nitrogen of ammonium giving water is too low; Turbidity is elevatory; The quantity that drink water is exorbitant; Circumfluence mud pump operational failure; Too low or PH value is exorbitant; Mud is smashed by machinery; Nitrite content is elevatory.
Above is sewage disposal COD abrupt elevatory reason, looking is be suddenly enlightened!
