Deep treatment system applicable to high-concentration organic wastewater of pits-ponds and method

Abstract

The invention discloses a deep treatment system applicable to high-concentration organic wastewater of pits-ponds and a method. The system comprises a first regulation tank, an efficient flocculatingsettling system, an MBR (Membrane Bioreactor) tank, a Fenton oxidation tower, a neutralization degassing tower, a coagulation tank, a sloping plate precipitation tank, a second regulation tank and anactivated-charcoal adsorption device which are sequentially connected through a pipeline. The system further comprises a PAC dosing device, a PAM dosing device, a heavy-metal trapping agent dosing device, an acid dosing device, a ferrous sulfate dosing device, a hydrogen peroxide dosing device, an alkali dosing device and an air blower; the first regulation tank is provided with a water inlet pipewhich is used for introducing the high-concentration organic wastewater; the PAC dosing device is connected to the efficient flocculating settling system; the PAM dosing device is connected with theefficient flocculating settling system and the coagulation tank separately; the heavy-metal trapping agent dosing device is connected to the efficient flocculating settling system; the concentrated sulfuric acid dosing device, the ferrous sulfate dosing device and the hydrogen peroxide dosing device are connected to the Fenton oxidation tower; the alkali dosing device is connected to the neutralization degassing tower; and the air blower is separately connected to the Fenton oxidation tower, the neutralization degassing tower and the coagulation tank.

Description

technical field [0001] The invention relates to the field of organic wastewater treatment, in particular to a system and method suitable for advanced treatment of high-concentration organic wastewater in pits and ponds. Background technique [0002] High-concentration organic wastewater generally refers to wastewater discharged from industries such as papermaking, leather and food. These wastewater contain a large amount of organic matter such as carbohydrates, fats, proteins, and cellulose. High oxygen content, high salt content, and contains heavy metals. A large amount of domestic and industrial wastewater is directly discharged into water bodies or ponds without any treatment, which will cause serious harm to the surrounding environment and even endanger human health. [0003] At home and abroad, a combination of physicochemical and biochemical methods is generally used to treat this kind of high-concentration organic wastewater. The wastewater is first treated physical...

AI Technical Summary

Problems solved by technology

However, high-concentration organic wastewater generally contains a lot of polymer refractory substances such as surfactants. It is difficult for conventional physicochemical and biochemical treatment processes to reduce the content of pollutants in wastewater to meet national standards. Long time, low efficiency, high cost

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