CN1049409C - Synchronous intensified jet method of biological dephenolized mud mixed nutrient sewage - Google Patents

Abstract

The present invention relates to a synchronous intensified jet method of biological dephenolized sludge mixed nutrient sewage, which is mainly used for treating wastewater containing organic substances, such as gas wastewater, and is especially suitable for the treatment of phenol sewage with high concentration. The present invention has the advantages of little energy consumption, short aeration time, and large sludge and volume load; the method of the present invention has the process that sewage orderly passes through a sewage standing tank, a floatation tank, a metering mixing tank, a water collecting tank, an aeration tank and a settling tank. The present invention is characterized in that active sludge is added to the metering mixing tank; mixed liquid which at least comprises organic wastewater and active sludge enters the aeration tank through a jet exhauster. Sludge, nutritive substances and sewage are synchronously intensified and jetted, and the gas and liquid mixed oxidation is accelerated.

Description

Biological dephenolize mud nutrition sewage synchronous reinforced jet method

The present invention relates to a kind of saprobia dephenolization treating method.Utilize microorganism under the catalysis of enzyme, the chemotrophy thing, decomposing organic waste is simple harmless organism.The present invention is specially adapted to the processing of high density phenol-containing wastewater.

Handle waste water several different methods is arranged.Usually be divided into physics, chemistry, biological three major types.Biological method is divided into aerobe again and anaerob is handled two big classes.Biological treatment waste water, both economical effectively to organic waste water especially, be a kind of reliable wastewater processing technology.Domestic on the basis that the basic aerobe of biological filter process and activated sludge process two classes is handled, developed some again as the deep water aeration, pure-oxygen aeration method, multilayer aeration, pipeline aeration, jet-flow aeration method, new technologies and methods such as contact oxidation method.But the blodisc of using always during the ultimate principle of these new technologies and method and current China produce, the surface aero-accelerator, methods such as blast aeration pond are basic identical, these method differences are that its aeration mode is different, but all be earlier organic waste water to be entered the aeration tank after air supporting, add biological sludge then, oxygenation thorough mixing in the aeration tank, general aeration time reached more than 12 hours, smashed the disclosed leather-making waste water treatment method of state patent CN91105917.All exist energy expenditure big, shortcoming such as aeration time is long, and equipment is huge, and volumetric loading is little.

The object of the invention is to provide a kind of biological dephenolize method of wastewater treatment.Adopt mud, nutrition, sewage synchronous reinforced jet.It is few to form a kind of energy consumption, and aeration time is short, the new biological dephenolize sewage water treatment method that sludge loading and volumetric loading are bigger.

The present invention is characterised in that, is added with active sludge in the metering tempering tank before the aeration tank, and this mixed solution that includes organic waste water and active sludge at least pumps into one-level or two-stage aeration tank through injector, the steps include:

(1). the sump pump that will contain organic waste is gone into stilling basin, removes heavy oil and slag;

(2). pump into flotation cell again through injector, carry out induced air flotation, the part oil slick becomes spumescence to overflow into oil trap;

(3). pump into the metering tempering tank again and mix, form the mixed solution that includes organic waste water and active sludge from the settling tank active sludge;

(4). pump into water leg again by organism in the activated sludge absorption water;

(5). pump into the aeration tank again through injector again, introducing air quickens the oxygenolysis of organic waste water under the effect of organism, and this step is for once or secondary;

(6). pump into settling tank again, form throw out, active sludge sinks down into bucket, returns the metering tempering tank by return line, and supernatant water enters down water.

The present invention is in the injector of aeration tank, participate in the effusive active sludge and contain nutritious organism, introducing air under suction function forms air water and cuts mutually in the trunnion of injector, strengthen the fusion of biological sludge and organism and oxygen, shortened the utilization ratio of aeration time and oxygen

Accompanying drawing 1 is the feel flow draw of block of the embodiment of the invention.The sump pump that contains organic waste among the figure is gone into stilling basin 1, and heavy oil and slag sink at the bottom of the pond, lightweight oil come-up, and the waste water after static is squeezed into flotation cell 2 with pump, carries out induced air flotation through injector, and most oil slick become spumescence to overflow into oil trap.Organic waste then feed tempering tank 3, in tempering tank, mix with the active sludge that refluxes from settling tank, and when mud belongs to industrial class sewage, adding microcosmic salt 4 in tempering tank 3.Pump into above-mentioned mixed solution again to water leg 5, the organism in the activated sludge absorption water.This mixed solution is promoted by pump and enters aeration tank 7 by injector 6.Jet flow negative pressure by injector trunnion place is introduced oxygen, strengthens organism, and fusion contacts biological bacteria with oxygen, quickens organism and decomposes, and biological bacteria is cultivated.According to the decision whether carrying out again of the organic concentration behind aeration secondary aeration.Organic waste water after the purification flows into settling tank 8, forms flocs unit, mud-water separation, and supernatant liquor enters down water.Active sludge sinks down into bucket, flows into tempering tank 3 by return line 9, reuses.

Table 1 is an embodiment of the invention test result, through trial run in 3 years, effect stability.Remove as can be seen from Table 1 the phenol rate in percent 99.9, COD efficient about percent 75, reach higher level.Mud comparable domestic similar technology height in age, and excellent in efficiency.Can also reduce sludge discharge like this, detection in service proves, phenol import average out to 158.31 mg/litre, and outlet is 0.065 mg/litre, clearance is 99.96 percent.This is the domestic good effect that did not have.Measuring inlet COD is 640 mg/litre, goes out to suck the COD129.5 mg/litre, and hydride import 0.61 mg/litre exports 0.065 mg/litre.

Table 1 is the present invention and other biological dephenolize system parameter contrast table.Suffice to show that technique effect of the present invention.

Table one

This equipment and domestic other biological dephenolize environment division parameter comparison are as showing:

Contrast producer title	Treatment capacity ton/time	The volatile phenol mg/litre		Remove efficient %	The COD mg/litre		Remove efficient %	Gas consumption cubic meter ton	Ton is measured in electricity consumption	Expense unit/ton
											Inlet	Outlet	Inlet	Outlet
		This equipment (draw and expose to the sun)	60		158.3	0.065									99.96	640	129.	77.9	4	0.66	0.46
Jinzhou, Liaoning Gas Company (table exposes to the sun)	40			138.7			1.78	98.7	702	262	62.7		2	1.1
		Coke-oven plant, Wuxi (draw and expose to the sun)	15		17	0.5									97.5	227.6	133.	74.16	1.3	2	0.6
Dalian coal gas two factories (drum exposes to the sun)	25			157			0.5	99.7	826	257	68.8		8	1.15
		Coking factory (drum exposes to the sun) is practiced in Beijing	150		235.7	1.09									99.50	1989	652	67.2		1.763
Iron and steel coke-oven plant, capital (drum exposes to the sun)	115			200			1	99.6	1500	400	66		1.65	-
		Coke-oven plant, Shenyang (drum exposes to the sun)	24		160	1									99.4	650	350	46.1	40-50	3.47	-

Claims (1)

1. a biological dephenolize mud nutrition sewage synchronous reinforced jet method is characterised in that the steps include:

(1). the sump pump that will contain organic waste is gone into static pond, removes heavy oil and slag;

(2). pump into flotation cell again through injector, carry out induced air flotation, the part oil slick becomes spumescence to overflow into oil trap;

(3). pump into the metering tempering tank again and mix, form the mixed solution that includes organic waste water and active sludge from the settling tank active sludge;

(4). pump into water leg again by organism in the activated sludge absorption water;

(5). pump into the aeration tank again through injector again, introducing air quickens the oxygenolysis of organic waste water under the effect of organism, and this step is for once or secondary;

(6). pump into settling tank again, form throw out, active sludge sinks down into bucket, returns the metering tempering tank by return line, and supernatant water enters down water.

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