CN103623627A

CN103623627A - Method for treating sewage by using biological active sand reactor

Info

Publication number: CN103623627A
Application number: CN201310597290.8A
Authority: CN
Inventors: 李金城; 施钦; 李文文; 莫德清; 沈雨樨
Original assignee: Guilin University of Technology
Current assignee: Guilin University of Technology
Priority date: 2013-11-25
Filing date: 2013-11-25
Publication date: 2014-03-12

Abstract

The invention discloses a method for treating sewage by using a biological active sand reactor, which comprises the steps that (1) a biological active sand reactor is established, wherein the biological active sand reactor is filled with a filter material (granular activated carbon), and a water inlet pipe, a water distributor, an effluent weir, a sand guide cone, an air lift pump, a sand lifting air tap, a sand lifting pipe, a sand washing device, a sand washing water outlet and an electrical control system are arranged in the biological active sand reactor; (2) sewage is fed through the water inlet pipe, is uniformly distributed by using the water distributor, and flows in a counter-current manner from bottom to top and passes through the filter material, so that impurities in the sewage are removed by filtering, and the turbidity and the chromaticity of the sewage are effectively removed; microorganisms in the sewage are attached to the filter material so as to form a biological film and organic pollutants in the sewage are drawn as nutrient substances, so that the organic pollutants in the sewage are removed. According to the method, the filtering effect and biological treatment effect of a general active sand reactor are combined, so that the organic pollutant removal ability of an active sand filter can be enhanced, and the removal of turbidity and chromaticity is significant.

Description

A kind of method with biologically active sand reactor for treatment sewage

Technical field

The present invention relates to advanced treatment of wastewater, micro-polluted water field of purification, particularly a kind of method with biologically active sand reactor for treatment sewage, processes for town sewage.

Background technology

At present, the most of urban wastewater treatment firm of China is all to adopt < < urban wastewater treatment firm pollutant emission standard > > (GB18918-2002) one-level B mark discharge standard, as long as qualified discharge is little to ambient influnence.But along with the fast development of Chinese society economy, urban population increases severely, cities and towns daily water consumption is anxious to be increased, and wastewater emission amount is obvious ascendant trend in recent years, and this causes larger pressure to some regional environment.Under these circumstances, if also by one-level B mark operation sewage treatment plant, nitrogen phosphorus etc. accumulates over a long period in water body, particularly be discharged into sealing water body, can cause body eutrophication, to the dry spell in summer, water quality deterioration is serious especially, the ecological balance is destroyed, and what make the masses is healthyly subject to great impact.

At present, adopt new technology, new equipment a kind of technological means that is urban wastewater treatment firm in proposing mark transformation.Filtration is the key link in sewage disposal, there is the problems such as floor space is large, filtrate backwash efficiency is not high, filtrate can harden in conventional filter, active sand filter is a kind of Collecting flocculation, clarify, be filtered into the continuous filtration equipment of one, and conventional filter has that floor space is little, energy consumption is low, backwash is cleaned thoroughly, filtrate can not harden, can bear load advantages of higher relatively.Yet simple active sand filter is limited to organic pollution disposal ability, be difficult to meet the actual needs that use.

Summary of the invention

Object of the present invention is exactly combined filtering and biological agent deeply treating wastewater, and a kind of method with biologically active sand reactor for treatment sewage is provided.

Concrete steps are

(1) set up a biologically active sand reactor, in-built filtrate (granular activated carbon), also comprises water inlet pipe, water-locator, effluent weir, leads abrasive cone, air lift, carries sand valve, sand extraction tube, sand-washing device, washed-out sand water out and electric control system.Biologically active sand reactor top one side is effluent weir, washed-out sand water out is arranged at effluent weir bottom, there is water inlet pipe at biologically active sand reactor middle part, and water inlet pipe below is connected with water-locator, water-locator below with lead abrasive cone and be connected, sand extraction tube stands on biologically active sand reactor middle part, and outside, sand extraction tube upper end is sand-washing device, and sand extraction tube lower end is for carrying sand valve, carry the external air lift of sand valve, the air lift other end is connected with electric control system.

(2) by water inlet pipe, pass into sewage, through water-locator uniform water distribution, sewage is flowed to upper by subinverse, and through filtrate, in sewage, impurity is filtered, and turbidity, colourity in sewage are effectively removed; Microbial adhesion in water forms biomembrane and draws organic pollutants as nutrient utilization on filtrate, and the organic pollution in sewage is removed; Through the filtrate purifying, from the effluent weir at top, flow out.Lead abrasive cone and will hold back the filtrate guiding bottom of pollutant.Air lift cleans to carrying sand valve air compressing for dirty filtrate is promoted to sand-washing device by sand extraction tube, washed-out sand water is flowed out by washed-out sand water out, and the filtrate being cleaned comes back to filter bed and enters next circulation.Electric control system, for controlling startup, operation and the warning of biologically active sand reactor and air lift.

When the present invention realizes general system for filtering active sand filtration, on filtrate, hang up biomembrane and reach the organic pollution of removing in sewage, and microorganism makes whole system more remarkable to the removal effect of colourity, turbidity.

Accompanying drawing explanation

Fig. 1 is overall structure cross-sectional schematic of the present invention.

Mark in figure: 1-filtrate, 2-is water inlet pipe, and 3-is water-locator, and 4-is effluent weir, and 5-leads abrasive cone, 6-air lift, 7-carries sand valve, 8-sand extraction tube, 9-sand-washing device, 10-washed-out sand water out, 11-electric control system.

The specific embodiment

Embodiment:

(1) as Fig. 1; set up a biologically active sand reactor; in-built filtrate 1(particle diameter is 10 ~ 20 order granular activated carbons), also comprise water inlet pipe 2, water-locator 3, effluent weir 4, lead abrasive cone 5, air lift 6, carry sand valve 7, sand extraction tube 8, sand-washing device 9, washed-out sand water out 10 and electric control system 11.Biologically active sand reactor top one side is effluent weir 4, washed-out sand water out 10 is arranged at effluent weir 4 bottoms, there is water inlet pipe 2 at biologically active sand reactor middle part, water inlet pipe 2 belows are connected with water-locator 3, water-locator 3 belows with lead abrasive cone 5 and be connected, sand extraction tube 8 stands on biologically active sand reactor middle part, sand extraction tube 8 outsides, upper end are sand-washing device 9, sand extraction tube 8 lower end, for carrying sand valve 7, are carried the external air lift 6 of sand valve 7, and air lift 6 other ends are connected with electric control system 11.

(2) by water inlet pipe 2, pass into sewage, through water-locator 3 uniform water distributions, sewage is flowed to upper by subinverse, and through the filtrate 1 in filter bed, in water, impurity is filtered, and turbidity, colourity in sewage are effectively removed.Progressively improve flow of inlet water to design discharge, through the continuous water flowing of 10 ~ 30 days, the microbial adhesion in water formed biomembrane and draws organic pollutants as nutrient utilization on filtrate 1, and the organic pollution in sewage is removed; Through the filtrate purifying, from the effluent weir 4 at top, flow out.

When monitoring delivery turbidity deterioration, open air lift 6 and carry out washed-out sand at intermittence.Lead abrasive cone 5 and will hold back the filtrate 1 guiding bottom of pollutant.Air lift 6 cleans to carrying sand valve 7 air compressing for dirty filtrate 1 is promoted to sand-washing device 9 by sand extraction tube 8, washed-out sand water is flowed out by washed-out sand water out 10, and the filtrate 1 being cleaned comes back to filter bed and enters next circulation.Electric control system 11, for controlling startup, operation and the warning of biologically active sand reactor and air lift 6, reaches the object of the operation of biologically active sand reactor automatic stabilisation and automatic intermittent washed-out sand.

COD, turbidity, colourity after processing in water reaches or is better than the one-level A standard in < < urban wastewater treatment firm pollutant emission standard > > (GB 18918-2002).

Claims

1. by a method for biologically active sand reactor for treatment town sewage, it is characterized in that being that concrete steps are:

(1) set up a biologically active sand reactor, in-built filtrate (1), also comprises water inlet pipe (2), water-locator (3), effluent weir (4), leads abrasive cone (5), air lift (6), carries sand valve (7), sand extraction tube (8), sand-washing device (9), washed-out sand water out (10) and electric control system (11), biologically active sand reactor top one side is effluent weir (4), washed-out sand water out (10) is arranged at effluent weir (4) bottom, there is water inlet pipe (2) at biologically active sand reactor middle part, water inlet pipe (2) below is connected with water-locator (3), water-locator (3) below with lead abrasive cone (5) and be connected, sand extraction tube (8) stands on biologically active sand reactor middle part, outside, sand extraction tube (8) upper end is sand-washing device (9), sand extraction tube (8) lower end is for carrying sand valve (7), carry the external air lift of sand valve (7) (6), air lift (6) other end is connected with electric control system (11),

(2) by water inlet pipe (2), pass into sewage, through water-locator (3) uniform water distribution, sewage is flowed to upper by subinverse, through filter bed, from the effluent weir (4) at top, flows out; Lead abrasive cone (5) and will hold back filtrate (1) the guiding bottom of pollutant; Air lift (6) cleans to carrying sand valve (7) air compressing for dirty filtrate (1) is promoted to sand-washing device (9) by sand extraction tube (8), washed-out sand water is flowed out by washed-out sand water out (10), and the filtrate being cleaned (1) comes back to filter bed and enters next circulation; Electric control system (11), for controlling startup, operation and the warning of biologically active sand reactor and air lift (6), reaches the operation of biologically active sand reactor automatic stabilisation and automatic intermittent washed-out sand;

Described filtrate (1) is particle diameter 10 ~ 20 object granular activated carbons.