Irrigated area domestic wastewater activated iron-anaerobe coupling strengthening and nitrogen and phosphorus removal device

Abstract

The invention discloses an irrigated area domestic wastewater activated iron-anaerobe coupling strengthening and nitrogen and phosphorus removal device. An anaerobic filter bed tank, an activated iron-anaerobe coupling reaction tank, a contact aeration tank, a settling tank, a disinfection tank, an aeration device and a backwashing device are sequentially arranged through partition boards; a water inlet pipe is communicated with the anaerobic filter bed tank; the anaerobic filter bed tank returns water and then is communicated with the activated iron-anaerobe coupling reaction tank; the activated iron-anaerobe coupling reaction tank returns water and then is communicated with the contact aeration tank; the contact aeration tank returns water and then is communicated with the settling tank; the settling tank is communicated with the disinfection tank; the disinfection tank is communicated with a water outlet pipe; the aeration device is arranged at the bottom of the contact aeration tank; a backflow device and the backwashing device are arranged between the contact aeration tank and the activated iron-anaerobe coupling reaction tank. The irrigated area domestic wastewater activated iron-anaerobe coupling strengthening and nitrogen and phosphorus removal device has the advantages of being compact and simple in overall structure, easy to install, manufacture and use, and low in cost; a self-burial mode is adopted, the ground space is not occupied, and the device is suitable for treatment of rural scattered domestic wastewater; the nitrogen and phosphorus removal and purification effects are remarkable.

Description

technical field [0001] The invention relates to an active iron-anaerobic microorganism coupling enhanced nitrogen and phosphorus removal device for domestic sewage in irrigation areas, belonging to the field of water treatment. Background technique [0002] According to the 2010 national survey of pollution sources, agricultural sources of chemical oxygen demand, total nitrogen and total phosphorus emissions accounted for 43.7%, 57.2% and 67.4% of the total emissions, respectively. Among them, there is basically no unified treatment pipe network or treatment device for rural domestic sewage in irrigation areas. Distributed rural domestic sewage has become an important source of water pollution in irrigation areas in my country. Rural domestic sewage in my country has the characteristics of large total discharge, scattered discharge points, and large coefficient of variation of water quantity and quality. Restricted by the rural social and economic conditions, my country's r...

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Problems solved by technology

However, powdery zero-valent iron particles are easy to deactivate, aggregate, passivate, and plate, and need frequent cleaning and replacement, and solid-liquid separation is required after treatment, which further increases the treatment cost and limits the wide application of zero-valent iron in water treatment. application

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