A process for treating coking wastewater and coal chemical wastewater
A technology for coal chemical wastewater and coking wastewater, applied in chemical instruments and methods, water/sewage multi-stage treatment, degassed water/sewage treatment, etc.
Active Publication Date: 2016-03-02
TIANJIN REDSUN WATER IND
View PDF2 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a process for effectively treating refractory coking wastewater and coal chemical wastewater, so that the COD and NH in the effluent 3 -N and other indicators can meet the discharge standards stipulated by the state at the same time, and solve the current situation that coking wastewater and coal chemical wastewater are difficult to treat in China
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0039] Utilize the combined process provided by the invention to influent COD and NH 3 -The actual coking wastewater with N of about 3000mg / L and 180mg / L was treated in a small test experiment. The experimental influent flow rate was 150mL / h. The coking wastewater 1 enters the resin adsorption tank A, and the resin adsorption tank A adopts a glass resin adsorption column with a diameter of 15mm, and 8% NaOH solution is desorbed, and the COD of the resin adsorption water 2 after resin adsorption is reduced from 3000mg / L to 750mg / L, the pH value of water 2 adsorbed by the resin is 10.6. Resin adsorption effluent 2 is removed NH3-N by air stripping tower B, and NH3-N in air stripping tower effluent 3 is reduced from 180mg / L to 40mg / L. The effective volume of anoxic and secondary aerobic bioreactors is 4500mL, and the total residence time is 30h, of which the hydraulic retention time of anoxic bioreactor C is 10h, the hydraulic retention time of primary aerobic bioreactor D is 1...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a new technology for treating coking wastewater and wastewater from coal chemical industry, which comprises the following steps of: (1) pretreatment: removing oils, suspended solids and the like in water by adjustment, oil separation, air flotation, filtration and the like; (2) resin adsorption: adsorbing the wastewater treated by the step (1) by use of a resin adsorption tank; (3) air stripping: treating the wastewater obtained by the step (2) by use of an air stripping tower, and removing most of COD and NH3-N in water by the steps (2) and (3); and (4) treating the wastewater of the step (3) through biological treatment, and further removing COD and NH3-N in water to optimize the whole treatment system, wherein the biological treatment comprises anoxic and two-level aerobic biological treatment. The COD removal rate of the method is over 93%, the removal rate of NH3-N is over 96%, and the COD of the yielding water is about 100mg / L, thereby reaching the second-level discharge standard of GB8978-1996 and approaching to the requirements of the first-level discharge standard; and the NH3-N is lower than 10mg / L, thereby reaching the first-level discharge standard of GB8978-1996.
Description
technical field [0001] The invention relates to a wastewater treatment process, in particular to a treatment method for coal chemical wastewater and coking wastewater, and belongs to the technical field of wastewater treatment. Background technique [0002] Coking wastewater is refractory biodegradable high-concentration toxic organic wastewater produced in the process of coking or gas production, mainly from coking plants in the iron and steel metallurgy and coking industries. Wastewater mainly contains ammonia nitrogen (NH 3 -N), cyanide, phenolic compounds, polycyclic aromatic compounds, heterocyclic compounds containing nitrogen, oxygen, sulfur, and aliphatic compounds, among which phenolic substances in wastewater contribute nearly 70% of the COD value. In addition to complex composition, this type of wastewater also has the characteristics of large changes in water quality, poor biodegradability, and high toxicity. [0003] At present, biological treatment is still t...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/28C02F1/20
Inventor 张兆军
Owner TIANJIN REDSUN WATER IND