CN113023891A

CN113023891A - Front-end wastewater toxicity early warning and disposal device and application method thereof

Info

Publication number: CN113023891A
Application number: CN202110372744.6A
Authority: CN
Inventors: 李海松; 胡培基; 田敏慧; 范艳艳; 谷漫飞
Original assignee: Zhihe Environmental Protection Technology Co ltd
Current assignee: Zhihe Environmental Protection Technology Co ltd
Priority date: 2021-04-07
Filing date: 2021-04-07
Publication date: 2021-06-25
Anticipated expiration: 2041-04-07
Also published as: CN113023891B

Abstract

The invention relates to a front-end wastewater toxicity early warning and disposal device and an application method thereof, which are characterized in that the treatment flow of the existing anaerobic reactor is optimized, and the threat of wastewater with unknown components to a bioreactor is reduced by using wastewater toxicity prediction. In addition, by prejudging the biological toxicity, the use frequency of an advanced oxidation system is reduced, and the wastewater treatment cost of enterprises is reduced. The invention provides a simple, energy-saving and easily-controlled biological treatment method for treating industrial wastewater.

Description

Front-end wastewater toxicity early warning and disposal device and application method thereof

Technical Field

The invention belongs to the field of water treatment application, and particularly relates to a high-toxicity wastewater biological early warning device and an application method thereof.

Background

The anaerobic reactor has the advantages of high biomass, strong pollutant removal capacity, small volume required by the reactor, low energy consumption compared with an aerobic reactor, low early investment, low operating cost, low sludge yield and the like, and is increasingly applied to the treatment of medium and high concentration industrial wastewater.

ATP (adenosine triphosphate) concentration and microorganism concentration have a stable corresponding relationship, and by measuring tATP (total adenosine triphosphate) and dATP (dissolved adenosine triphosphate), whether the microorganism is inhibited or even whether the microorganism is dead can be judged.

At present, most of industrial wastewater in a factory is mixed wastewater of each production workshop, and due to the reasons of production plan change, technical confidentiality and the like, the composition of the wastewater is unstable, high-biotoxicity wastewater can be generated in individual cases, and the part of wastewater usually has indefinite occurrence time, but can generate great harm to a bioreactor. In the prior art, a mature method for early warning the toxicity of incoming water is provided, but no clear description is provided for further treatment of high-toxicity wastewater.

The invention aims to provide a process for early warning and treating front-end wastewater toxicity and an application method thereof.

Disclosure of Invention

Aiming at the problem that the conventional sewage treatment equipment is not ideal in impact resistance, the invention provides a method for early warning the biotoxicity of industrial wastewater by combining the background technology, which mainly comprises the following steps: front-end wastewater toxicity early warning and disposal process and application method thereof

The technical scheme of the invention is as follows:

the process is characterized in that a regulating tank is arranged for temporarily storing industrial water and wastewater, a toxicity detection reactor is arranged besides a main bioreactor, the volume of the toxicity detection reactor is 1/300-1/20 of the main bioreactor, sludge is from the main bioreactor, the filling amount is 1/10-3/4 of the toxicity detection reactor, a stirrer is arranged at the bottom of the reactor, and the sludge and the wastewater are mixed by stirring. When each workshop adjusts the production task, the toxicity of the produced wastewater is detected once. Temporarily storing the generated wastewater by a regulating reservoir, mixing the wastewater with sludge in a toxicity detection reactor for one hour, and then respectively detecting the sludge in the toxicity detection reactor and tATP and dATP of a main body bioreactor, wherein when the reduction amount of the tATP of the toxicity detection reactor is within 1/10-1/2, the increase of the proportion of dATP is not more than 1/10-1/4, which indicates that the toxicity of the wastewater is within a biologically acceptable range, and the wastewater can directly enter the main body anaerobic reactor; when the reduction amount of tATP is above 1/10-1/2 and the proportion of dATP is increased to exceed 1/10-1/4, the wastewater needs to be oxidized to reduce the biological toxicity, and the impacted sludge is directly dewatered. And then continuously carrying out toxicity detection on the wastewater after the oxidation treatment, and entering a bioreactor for further treatment after the detection is passed.

The invention is further improved as follows: by pre-judging the biological toxicity of the wastewater, the use frequency of oxidation pretreatment is reduced, the treatment cost of the high-toxicity wastewater is reduced, and the impact of high-toxicity substances on the reactor is weakened, so that the subsequent biological treatment is facilitated.

The invention is characterized in that: the treatment process of the existing anaerobic reactor is optimized, the toxicity of the wastewater is used for prejudging, and the threat of the wastewater with unknown components to the bioreactor is reduced. In addition, by prejudging the biological toxicity, the use frequency of an advanced oxidation system is reduced, and the wastewater treatment cost of enterprises is reduced. Provides a simple, energy-saving and easily-controlled biological treatment method for treating industrial wastewater.

Drawings

FIG. 1 is a schematic diagram of a front-end wastewater toxicity warning and disposal device

Reference numerals

1-a regulating reservoir; 2-a gas generator; 3-a gas flow meter; 4-an oxidation reactor; 5-a gas absorption cell; 6-a water inlet pump of the toxicity detection reactor; 7-a bidirectional water inlet pump of the oxidation reactor; 8-toxicity test reactor; 9-a toxicity detection device; 10-bioreactor water inlet pump; 11-a bioreactor; 12-a sludge pump; i-a wastewater oxidation system; II, a wastewater toxicity early warning system; 13-sludge pump.

Detailed Description

The invention is further illustrated by way of example in the following figures:

FIG. 1 is a schematic diagram of a front-end wastewater toxicity warning and disposal device.

The process flow for establishing the biological reaction is shown in figure 1, and the internal operation of the process flow is described as follows:

every time the production task of the production workshop is changed, the wastewater generated in the production process is temporarily stored in the regulating tank 1 and enters the toxicity detection reactor 8 through the toxicity detection reactor water inlet pump 6, meanwhile, the sludge in the bioreactor 11 is pumped into the toxicity detection reactor 8 through the sludge pump 12, the sludge and the wastewater are fully mixed in the reactor for 1 hour by using a stirrer, and the tATP and dATP detection is carried out on the sludge in the toxicity detection reactor 8 and the bioreactor 11 by using the toxicity detection device 9. When the reduction amount of tATP is within 1/10-1/2 and the ratio of dATP/tATP is increased to be not more than 1/10-1/4, which shows that the biological toxicity of the wastewater is within the range that the microorganisms can bear, the wastewater in the adjusting tank 1 directly enters the bioreactor 11 for treatment through a 10 bioreactor water inlet pump, and the sludge in the toxicity test reactor 8 is also pumped back to the bioreactor 11 through a sludge pump 12. If the reduction amount of tATP is more than 1/10-1/2 and the ratio of dATP/tATP is higher than 1/10-1/4, sludge in the toxicity detection reactor 8 is directly pumped into a sludge dewatering system through a sludge pump 13 for sludge dewatering treatment, meanwhile, wastewater in the regulating reservoir 1 enters the oxidation reactor 4 through the two-way water inlet pump 7 of the oxidation reactor, gas generated by the gas generator 2 enters the oxidation reactor 4 through the gas flowmeter 3 for pretreatment of the high-toxicity wastewater, and residual gas enters the gas absorption pool 5 for absorption. Pumping the wastewater back to the regulating reservoir 1 again through a bidirectional water inlet pump of the oxidation reactor 7 after the pretreatment is finished, and enabling the wastewater to enter the wastewater toxicity early warning system II again for toxicity detection, wherein if the toxicity detection is passed, the next step of treatment can be carried out; and if the toxicity detection is not passed, the wastewater enters a wastewater oxidation system I for pretreatment again.

Example 1

The process of the invention is adopted to transform a certain pigment factory. The biological water treatment system of the plant consists of an anaerobic reactor and an aerobic reactor. The whole biochemical property of the waste water of the factory is good, and the water outlet can reach below 250mg/L in most of time.But a stream of waste water with strong toxicity is discharged irregularly, and the frequency is not fixed, so that the anaerobic reactor of the plant generates acidification phenomenon, and the COD of the biochemical effluent is increased to more than 500 mg/L. After transformation, a front-end wastewater toxicity early warning and disposal device is added, wherein the volume of the device is 1m³The toxicity detection reactor of (1), QuenchgGone21 manufactured by LuminuUltra corporation was used^TMThe Waterstart Test Kit and its equipped luminometer perform the detection of tATP and dATP. Under normal conditions, the tATP value of the sludge is 2000-5000ng ATP/mL, and the dATP value is 200-500 ng ATP/mL; after the high-toxicity wastewater appears, tATP is reduced to 1000 ng ATP/mL and dATP is increased to 600 ng ATP/mL, the high-toxicity wastewater is successfully pre-warned for several times after modification, gas oxidation pretreatment is carried out on the wastewater in time, and the phenomenon of over-acidification of the anaerobic reactor is avoided. The monitoring data are shown in table 1 and table 2.

Table 1 example 1 monitoring data of acidification of anaerobic reactor when not modified

Table 2 example 1 monitoring data for toxicity warning after modification

Claims

1. The utility model provides a front end waste water toxicity early warning and processing apparatus which characterized in that: the device comprises a regulating reservoir (1), a wastewater toxicity early warning system (II), a wastewater oxidation system (I) and a bioreactor (11); wherein the waste water early warning system (II) comprises a toxicity detection reactor (8) and a toxicity detection device (9); the wastewater oxidation system (I) comprises a gas generator (2), a gas flowmeter (3), an oxidation reactor (4) and a gas absorption pool (5).

2. The apparatus of claim 1, wherein: the sludge in the bioreactor (11) and the toxicity test reactor (8) can be exchanged by a sludge pump (13).

3. The apparatus of claim 1, wherein: the gas in the waste water oxidation system is ozone, chlorine or chlorine dioxide.

4. The apparatus of claim 1, wherein: the volume of the toxicity detection reactor (8) is 1/300-1/20 of the bioreactor (11), the sludge comes from the bioreactor (11), and the filling amount of the sludge is 1/10-3/4 of the volume of the toxicity detection reactor (8).

5. The method of application of the apparatus of claim 1, wherein: before entering a bioreactor (11), wastewater firstly enters a toxicity detection reactor (8), and tATP and dATP detection is carried out on sludge in the toxicity detection reactor (8) and the bioreactor (11) by using a toxicity detection device (9); when the reduction amount of tATP is within 1/10-1/2 and the ratio of dATP/tATP is increased to be not more than 1/10-1/4, the biological toxicity of the wastewater is within the range which can be tolerated by microorganisms, and then the wastewater can enter a bioreactor (11) for further treatment; when the variation of tATP and dATP exceeds the range, the wastewater needs to enter a wastewater oxidation system (I) for oxidation pretreatment to reduce the toxicity of the wastewater, then the wastewater enters a wastewater early warning system (II) again for toxicity detection, and if the toxicity detection is passed, the next step of treatment can be carried out; if the toxicity detection is not passed, the wastewater enters a wastewater oxidation system (I) for re-pretreatment until the toxicity detection is passed.