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Method and system for treating saline wastewater

A technology for saline wastewater and wastewater treatment, applied in water treatment parameter control, chemical instruments and methods, biological water/sewage treatment, etc., can solve problems such as difficult treatment of high-salt sewage

Active Publication Date: 2021-08-20
CHINA SHENHUA ENERGY CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Therefore, it is necessary to provide a method and system for treating saline wastewater to solve the difficult problem of high-salt wastewater in the prior art

Method used

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  • Method and system for treating saline wastewater
  • Method and system for treating saline wastewater
  • Method and system for treating saline wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] COD and COD removal rate were selected as water quality parameters, and optimal TDS was set for the biochemical system containing halophagic bacteria. Specific steps are as follows:

[0072] (1) Pass industrial saline wastewater into activated sludge containing halophilic bacteria, use activated sludge to desalinize the saline wastewater to obtain the first treated wastewater, and gradually increase the salt content in the process of desalination pretreatment The flow rate of waste water, measure the TDS value of saline waste water at different flow rates, and measure the COD value of saline waste water at different flow rates;

[0073] (2) measure the COD of the first treatment waste water that desalination pretreatment obtains under different flows, to obtain the COD value of the first treatment waste water, by utilizing the COD value of the first treatment waste water and the saline waste water measured in step (1) Calculate the COD removal rate of the first treated...

Embodiment 2

[0079] The ammonia nitrogen content and ammonia nitrogen removal rate were selected as water quality parameters, and the optimal TDS was set for the biochemical system containing halophagic bacteria. Specific steps are as follows:

[0080] (1) Pass industrial saline wastewater into activated sludge containing halophilic bacteria, use activated sludge to desalinize the saline wastewater to obtain the first treated wastewater, and gradually increase the salt content in the process of desalination pretreatment The flow rate of waste water, measure the TDS value of saline waste water at different flow rates, and measure the ammonia nitrogen content of saline waste water at different flow rates;

[0081] (2) measure the ammonia nitrogen content of the first treatment waste water that desalination pretreatment obtains under different flows, to obtain the ammonia nitrogen content value of the first treatment waste water, by utilizing the ammonia nitrogen content value of the first tr...

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Abstract

The present invention provides a method and system for treating saline wastewater. The method of the present invention comprises: making saline wastewater flow through activated sludge containing halophilic bacteria, using the activated sludge to perform desalination pretreatment on the saline wastewater to obtain the first treated wastewater, and gradually increasing the saline wastewater during the desalination pretreatment process Flow rate, to measure the TDS value of saline wastewater at different flow rates; to measure the water quality parameters of the first treated wastewater, each water quality parameter has a corresponding preset range, and the TDS value under the flow rate corresponding to each water quality parameter value that meets the preset range Set as the first TDS optimal value group; adjust the flow of saline wastewater into the activated sludge, so that its TDS value reaches the range covered by the first TDS optimal value group, so as to continue desalination treatment of saline wastewater, water quality Parameters include COD and / or ammonia nitrogen content. The method and system of the invention can realize economical and effective removal of pollutants in saline wastewater.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular, the invention relates to a method and a system for treating saline wastewater. Background technique [0002] With the acceleration of my country's industrialization process, high-salt wastewater will be produced in many production areas, such as printing and dyeing, papermaking, chemical industry, pesticides, oil extraction, seafood processing, etc. Such wastewater usually contains high concentrations of organic pollutants and is directly discharged to the environment. Cause serious pollution and damage. If high-salt wastewater seeps into the soil system, soil organisms and plants will die due to dehydration, causing the disintegration of the soil ecosystem, and high-salt wastewater usually contains other high-concentration organic matter or nutrients. If it is not treated directly Discharge will bring greater pressure to the water environment and accelerate the eutrophication p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/34
CPCC02F3/34C02F2209/08C02F2209/14
Inventor 娄成杰张红旗高小龙王春萍崔恒玲程玉春
Owner CHINA SHENHUA ENERGY CO LTD
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