CN107758904A

CN107758904A - Degreasing wastewater preprocessing process is carried out in sewage disposal

Info

Publication number: CN107758904A
Application number: CN201610678706.2A
Authority: CN
Inventors: 黄鸣
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-08-17
Filing date: 2016-08-17
Publication date: 2018-03-06

Abstract

The invention discloses one kind to carry out degreasing wastewater preprocessing process in sewage disposal, with pump by intermittent regulation pond waste water lifting to chemical reaction groove, 30% sulfuric acid is added into groove pH is adjusted to 2~3, the higher fatty acids graining out in emulsifying agent is set to go out aliphatic acid, these higher fatty acids are not soluble in water and are dissolved in oil, the condensate oil so that degreasing wasting liquid is demulsified, in addition, the anion surfactant in degreasing wasting liquid is set easily to decompose and loss of stability in an acidic solution after acid adding, lose original oleophylic and hydrophilic balance, so as to reach demulsification, waste water gravity flow after Production Wastewater By Combined Acidification And Demulsification enters grease trap and carries out oil removal processing, oil after processing, which is collected into oil collection barrel, individually to be handled or transports outward.The technique make it that sewage treating efficiency is high, and degreasing efficiency high after processing, sewage can be discharged directly, do not pollute the environment, solve that the noxious material contained in existing sewage is more, and its processing is not clean, and the efficiency of processing is low, the problem of causing to pollute environment after discharging.

Description

Degreasing wastewater preprocessing process is carried out in sewage disposal

Technical field

The present invention relates to a kind of technique, and degreasing wastewater preprocessing process is carried out in sewage disposal more particularly, to one kind.

Background technology

Sewage, it is often referred to discharge water necessarily polluted, from life and production.Sewage mainly has sanitary sewage, work Industry waste water and early-stage rainwater.The ill pathogen contaminant of major pollutants, oxygen consumption pollutant, plant nutrient and the poisonous dirt of sewage Contaminate thing etc..According to the viewpoint of sewage source, sewage can be defined as from the discharge of house, office, business or industrial area and ground The liquid or water that carry waste of the mixing such as lower water, surface water, snowstorm.Sewage is correspondingly reduced dirty by many classifications Influence of the water to environment also has many technologies and technique.According to sewage source, sewage can be divided into this four class.The first kind:Industry Sewage of the waste water from manufacturing, mining and industrial production activities, including lived from the runoff stored, processed with industry or business Leachate site, and it is other be not sanitary sewage waste water.Second class：Sanitary sewage is from house, office building, office or similar Sewage；Hygienic sewage；The industrial wastewater mixed in effluent sewerage, including sewerage system in sanitary sewage.3rd class:Business Industry sewage exceedes nontoxic, the harmless sewage of sanitary sewage from commercial facility and some compositions.Such as sewage from catering business.Laundry Sewage, animal feeding sewage, sewage etc. caused by hairdressing place.4th class：Overland flow is under rainwater, snow-broth, highway Water, the water from city and industrial area etc., overland flow does not infilter soil, enters underground water along street and land.Class In water pollution caused by production activity, water pollution most serious caused by industry.Such as industrial wastewater, it is more containing pollutant, into Divide complexity, not only be not easy to purify in water, and handle also relatively difficult.Industrial wastewater, it is that industrial pollution causes water pollution Most important reason.It accounts for the major part of the pollutant of industry discharge.Pollutant contained by industrial wastewater because of factory's species not Vary together, even same class factory, production process is different, and the quality and quantity of its contained pollutant is also different.Industry removes The waste water of discharge is directly injected into water body and causes pollution outer, and solid waste and waste gas also can polluted-water.Agricultural pollution is first Because farming or the reclamation of wasteland make soil surface porosity, the rainfall in soil and also unstable landform, a large amount of silts are flowed into water, increase Suspension in water.An also major reason is that agricultural chemicals, the usage amount of chemical fertilizer are increasing, and the agricultural chemicals and chemical fertilizer used is only There is a small amount of attachment or absorbed, remaining overwhelming majority remains in soil and floating in an atmosphere, by rainfall, by rainwash Wash away into surface water and penetrate into surface water formed pollution.Urban pollution resource be because urban population concentrate, city domestic sewage, Caused by rubbish and waste gas cause water pollution.Pollution of the urban pollution resource to water body is mainly sanitary sewage, and it is people's day The mixed liquor of caused various sewage in often living, including the sewage of kitchen, washing room, bathroom and lavatory discharge.The world On the only discharge of urban area 1 year just up to 500 cubic kilometers of industrial and life contaminated water, and each drop sewage will pollute several times Or even the water body of decades of times.

The noxious material contained in present sewage is more, and its processing is not clean, and the efficiency handled is low, causes dirt after discharge Contaminate environment.

The content of the invention

It is an object of the invention to overcome the noxious material contained in above-mentioned existing sewage more, its processing is not clean, and The efficiency of processing is low, the problem of causing to pollute environment after discharging, devises one kind progress degreasing waste water in sewage disposal and locates in advance Science and engineering skill, the technique make it that sewage treating efficiency is high, and degreasing efficiency high after processing, sewage can be discharged directly, will not be dirty Environment is contaminated, solves that the noxious material contained in existing sewage is more, and its processing is not clean, and the efficiency of processing is low, the row of causing The problem of environment is polluted after putting.

The purpose of the present invention is achieved through the following technical solutions：Degreasing wastewater preprocessing process is carried out in sewage disposal, With pump by intermittent regulation pond waste water lifting to chemical reaction groove, 30% sulfuric acid is added into groove pH is adjusted to 2~3, made in emulsifying agent Higher fatty acids graining out go out aliphatic acid, these higher fatty acids are not soluble in water and are dissolved in oil so that degreasing wasting liquid demulsification analysis Oil, in addition, making the anion surfactant in degreasing wasting liquid easily decompose and loss of stability in an acidic solution after acid adding, lose Removed original oleophylic and hydrophilic balance, so as to reach demulsification, the waste water gravity flow after Production Wastewater By Combined Acidification And Demulsification enter grease trap carry out every Oil processing, the oil after processing, which is collected into oil collection barrel, individually to be handled or transports outward, and CODCr is from 4000~5000mg/L after pretreatment 1600~2000mg/L is reduced to, clearance is 60% or so；And oil content is down to 50~70 mg/L from 300~950 mg/L, Clearance is up to 90%~95%.

In summary, the beneficial effects of the invention are as follows：The technique make it that sewage treating efficiency is high, and degreasing is imitated after processing Rate is high, and sewage can directly be discharged, do not polluted the environment, and solves that the noxious material contained in existing sewage is more, and it is handled not Totally, and processing efficiency it is low, cause discharge after pollute environment the problem of.

Embodiment

With reference to embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited only to This.

Embodiment：

Degreasing wastewater preprocessing process is carried out in sewage disposal, with pump by intermittent regulation pond waste water lifting to chemical reaction groove, 30% sulfuric acid is added into groove pH is adjusted to 2~3, the higher fatty acids graining out in emulsifying agent is gone out aliphatic acid, these higher aliphatics Acid is not soluble in water and is dissolved in oil, the condensate oil so that degreasing wasting liquid is demulsified, in addition, making the anionic surface in degreasing wasting liquid after acid adding Activating agent easily decomposes and loss of stability in an acidic solution, original oleophylic and hydrophilic balance is lost, so as to reach brokenly Breast, the waste water gravity flow after Production Wastewater By Combined Acidification And Demulsification enter grease trap and carry out oil removal processing, and the oil after processing, which is collected into oil collection barrel, individually to be located Reason or outward transport, CODCr is reduced to 1600~2000mg/L from 4000~5000mg/L after pretreatment, and clearance is 60% or so； And oil content is down to 50~70 mg/L from 300~950 mg/L, clearance is up to 90%~95%.

The technique make it that sewage treating efficiency is high, and degreasing efficiency high after processing, sewage can be discharged directly, will not be dirty Environment is contaminated, solves that the noxious material contained in existing sewage is more, and its processing is not clean, and the efficiency of processing is low, the row of causing The problem of environment is polluted after putting.

It is described above, be only presently preferred embodiments of the present invention, any formal limitation not done to the present invention, it is every according to Any simply modification, the equivalent variations substantially made according to the technology of the present invention, method to above example, each fall within the present invention Protection domain within.

Claims

1. degreasing wastewater preprocessing process is carried out in sewage disposal, it is characterised in that：With pump by intermittent regulation pond waste water lifting To chemical reaction groove, 30% sulfuric acid is added into groove pH is adjusted to 2~3, the higher fatty acids graining out in emulsifying agent is gone out fat Acid, these higher fatty acids are not soluble in water and are dissolved in oil, the condensate oil so that degreasing wasting liquid is demulsified, in addition, making degreasing give up after acid adding Anion surfactant in liquid easily decomposes and loss of stability in an acidic solution, loses original oleophylic and hydrophilic Balance, it is demulsified so as to reach, the waste water gravity flow after Production Wastewater By Combined Acidification And Demulsification enters grease trap and carries out oil removal processing, and the oil after processing is collected into Individually handle or transport outward in oil collection barrel, CODCr is reduced to 1600~2000mg/L from 4000~5000mg/L after pretreatment, goes Except rate is 60% or so；And oil content is down to 50~70 mg/L from 300~950 mg/L, clearance is up to 90%~95%.