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A kind of treatment method of organic waste water containing arsenic

A technology of organic wastewater and treatment methods, applied in water/sewage treatment, water treatment parameter control, water/sewage multi-stage treatment, etc., to achieve the effects of improving utilization rate, reducing sludge treatment cost, and producing less slag

Active Publication Date: 2022-05-13
LASER RES INST OF SHANDONG ACAD OF SCI
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  • Description
  • Claims
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Problems solved by technology

The existing arsenic-containing organic wastewater treatment process has obvious deficiencies, and it is urgent to find an environmentally friendly, cost-effective, and high-discharge standard arsenic-containing organic wastewater treatment method

Method used

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  • A kind of treatment method of organic waste water containing arsenic

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Embodiment

[0051] Example: Water quality of arsenic-containing wastewater from an arsenic product enterprise:

[0052] Arsenic-containing acid-alkali wastewater: pH=6, arsenic content in wastewater TAs=200mg / L, COD=150mg / L, wastewater production 10m 3 / day, collected up to 800m 3 Reconciliation pool pending.

[0053] Step 1: Pump the arsenic-containing wastewater in the adjustment tank to a 400L mixing tank, adjust the pH of the wastewater to 3 with dilute sulfuric acid, set up a 500L reaction tank downstream of the mixing tank, and set up on the connecting pipeline between the mixing tank and the reaction tank The nano-iron particle generation device controls the flow rate of the waste water from the 400L mixing tank into the 500L reaction tank to be 1m3 / hour. The waste water enters the 500L reaction barrel;

[0054] Step 2: Dosing H into the reaction barrel 2 o 2 , the metering pump flow rate is set to 3.5L / hour, H 2 o 2 The molar ratio to iron is 3:1, ORP>450mV is controlled, a...

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Abstract

The invention relates to a method for treating arsenic-containing organic wastewater, comprising the following steps: (1) adjusting the pH of the arsenic-containing organic wastewater to 2 to 4, allowing the pH-adjusted wastewater to flow through a nano-iron particle generating device to make the nano-iron particles The iron particle generation device generates nano-iron particles in situ in wastewater; (2), adding H to the wastewater added with nano-iron particles 2 o 2 Carrying out the nano-iron / heterogeneous Fenton oxidation reaction until the reaction is completed; (3), adjusting the pH of the mixed liquid after the reaction to 8-9, and arsenic ion flocculation and precipitation are separated from the waste water. The treatment method of the invention has good effect on removing arsenic and COD from the arsenic-containing organic wastewater, and can meet increasingly stringent arsenic discharge standards.

Description

technical field [0001] The invention relates to the technical field of heavy metal industrial wastewater treatment, in particular to a treatment method for arsenic-containing organic wastewater. Background technique [0002] Arsenic-containing organic wastewater from the arsenic compound synthesis workshop usually comes from two parts, one part comes from the production process of arsenic products; the second part comes from ground flushing water and road rainwater. As a class I pollutant, the discharge of arsenic is strictly controlled. In Table 2 of the "Discharge Standards for Industrial Pollutants of Tin, Antimony and Mercury" (GB30770-2014), it is required that arsenic <0.1mg / L, and the special discharge standard is arsenic <0.05 mg / L. However, some environmental capacity is small or the discharge of arsenic is subject to total control or zero discharge. Commonly used industrial arsenic removal methods include chemical precipitation, electrocoagulation, arsenic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/06C02F101/10C02F101/30
CPCC02F9/00C02F1/66C02F1/725C02F1/722C02F1/56C02F1/281C02F1/4678C02F1/463C02F1/5236C02F2305/026C02F2101/103C02F2101/30C02F2209/08
Inventor 郭建伟王国庆丁莉唐先存程飞刘连杰徐开宝李旭东
Owner LASER RES INST OF SHANDONG ACAD OF SCI
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