Method for starting bioreactor used for treatment of wastewater containing triethyl phosphate

A technology of triethyl phosphate and bioreactor, which is applied in chemical instruments and methods, water pollutants, biological water/sewage treatment, etc., can solve the problems of unbearable and high treatment costs for enterprises, and achieve the effect of low cost

Active Publication Date: 2019-09-17
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when advanced oxidation technology is used to degrade TEP in cytidylic acid wastewater, the treatment cost is very high, which is difficult for enterprises to bear

Method used

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  • Method for starting bioreactor used for treatment of wastewater containing triethyl phosphate
  • Method for starting bioreactor used for treatment of wastewater containing triethyl phosphate
  • Method for starting bioreactor used for treatment of wastewater containing triethyl phosphate

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Start-up of anaerobic bioreactor for treating cytidylic acid wastewater: add 200mL of anaerobic bioreactor from a UASB reactor in a wastewater treatment workshop of a chemical enterprise to each of three 500mL anaerobic reactors (numbered sequentially A1, A2 and A3). Sludge, then add 100mL tap water to each reactor, and then add 100mL No. I, II and III waste water in A1, A2 and A3 anaerobic reactors (see Table 1). The reactor was sealed with a rubber stopper with a conduit, and the other end of the conduit was inserted into a water-sealed bottle to prevent air from being sucked back into the anaerobic reactor. Both the anaerobic reactor and the water-sealed bottle were placed in a constant temperature water bath shaker at 35°C. Change the water once a day, measure the pH value before changing the water, and then turn off the power of the oscillator. After settling for 1-2 hours, the reactor was taken out from the shaker, and 100 mL of the supernatant was poured out, an...

Embodiment 2

[0023] After the A1 reactor of embodiment 1 runs 106d, its influent is switched to actual cytidylic acid waste water by No. 1 waste water, and other operating conditions all remain unchanged, and test result is as follows figure 2 shown.

[0024] Depend on figure 2 It can be seen that when the influent of A1 reactor is switched from No. I wastewater to actual cytidylic acid wastewater, the concentration of organic phosphorus (Org.-P) in the effluent increases over the first 6 days, but after The concentration of Org.-P in the effluent began to decrease and gradually stabilized. After running for 50 days, the average concentration of Org.-P in the effluent is about 2.9mg / L, and the mineralization rate of organic phosphorus (mainly TEP) in cytidylic acid wastewater is about 95%, which shows that the anaerobic biological method is used to treat cytidine In the case of acid wastewater, as long as the anaerobic reactor is successfully started, the TEP in it can be efficiently d...

Embodiment 3

[0026] Start-up of the aerobic bioreactor for treating cytidylic acid wastewater: Add 1300mL of water from the aeration tank of a certain urban sewage treatment plant to each of the three aerobic reactors (numbered O1, O2 and O3) with an effective volume of 2000mL Then add 700mL of No. I, II and III waste water in O1, O2 and O3 aerobic reactors respectively (see Table 1). Turn on the blower, aerate and oxygenate the O1, O2 and O3 aerobic reactors, control the DO concentration to 2-4mg / L, stop the aeration after 6h, let it settle for 2h, and discharge 700mL supernatant from the three reactors respectively liquid, and then add 700mL of No. I, II and III waste water respectively. The operation cycle of O1, O2 and O3 aerobic reactors is 24 hours, of which aeration is 6 hours, sedimentation is 2 hours, the time of water inflow and drainage is very short, and the rest is idle time. Test results such as image 3 shown.

[0027] Depend on image 3 (O1) It can be seen that when the...

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Abstract

The invention provides a method for starting a bioreactor used for treatment of wastewater containing triethyl phosphate. The method comprises the steps of (1) when the bioreactor used for the treatment of the wastewater containing the triethyl phosphate is started, using the triethyl phosphate as a sole organic carbon source of inflow water of the reactor; (2) after the concentration of PO4<3->-P of effluent of the reactor changes to be basically stable from rapid rise, successfully starting the bioreactor, and then switching the inflow water of the reactor into the wastewater containing the triethyl phosphate. The method provided by the invention has the advantages that the high-efficiency biodegradation of the triethyl phosphate (TEP) is realized by changing the starting mode of an anaerobic or aerobic biochemical treatment process of the wastewater; the problem that the TEP in the wastewater can not be biochemically degraded when the conventional anaerobic-aerobic process is used for carrying out biochemical treatment on cytidylate wastewater is solved, so that a foundation is laid for achieving total phosphorus (TP) up-to-standard discharge of cytidylate wastewater at low cost.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for starting a bioreactor for treating cytidylic acid wastewater. Background technique [0002] The process wastewater generated during the production of cytidylic acid (referred to as cytidylic acid wastewater) contains a small amount of triethyl phosphate (TEP) in addition to common pollutants such as COD (chemical oxygen demand) and phosphate. At present, cytidylic acid production enterprises use the combined process of "coagulation sedimentation pretreatment", "anaerobic-aerobic biochemical treatment" and "coagulation sedimentation post-treatment" to treat cytidylic acid wastewater, of which "coagulation sedimentation pretreatment" The main purpose is to remove phosphate in wastewater. The main purpose of "anaerobic-aerobic biochemical treatment" is to remove COD and degrade TEP into phosphate. The main purpose of "coagulation and sedimentation post-treatmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F101/34
CPCC02F3/308C02F2101/34
Inventor 曹国民盛梅杨林燕钱梦成韩跃飞蔡宇杨灿赵慧慧陈星奎
Owner EAST CHINA UNIV OF SCI & TECH
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