Reading guidance：In sewage treatment plant, sewage treatment facilities and sewage treatment facilities is an organic whole, in large sewage treatment plant sludge depth treatment project, in particular, should pay att

   In sewage treatment plant, sewage treatment facilities and sewage treatment facilities is an organic whole, in large sewage treatment plant sludge depth treatment project, in particular, should pay attention to good cohesion between the two. Attaches great importance to the sewage removing slag "in addition to sand the effect of pretreatment on sludge treatment significantly affected also need to be pay attention to liquid sludge processing to alleviate the liquid sludge reflux on wastewater treatment technology of water quality impact. Many domestic sludge digestion project operation status was generally poor. In addition to wastewater pre treatment has been paid less attention. In the sludge treatment sludge treatment process.
  1. Pay attention to sludge disposal process
    Primary sludge not only has the characteristics of good degradation in other sludge, while the biogas production showed excellent performance, therefore, combined with the sludge drying energy demand, should be the primary sludge into sludge digestion system. The sludge sludge digestion system according to the actual process needs to be made considering the regulation. The sulfur content in the sludge and with higher H2S in the biogas digestion, efficient precipitation process of sewage treatment process into the digestive system in the use of aluminum sulfate chemical sludge should not, in order to effectively protect the subsequent use of biogas equipment. And in medicine (such as replacing poly aluminum)) produced by chemical the sludge can be incorporated into the treatment of sludge digestion system. The content of organic chemical sludge and its biodegradability was higher than that of residual sludge, therefore, in the operation of sludge digestion system. In use, the use of this type of chemical sludge should be given priority to the excess sludge, that is, after excluding the negative impact of aluminum sulfate chemical sludge can be fully incorporated into the sludge digestion treatment system for treatment.
   2. attach great importance to the scum on the normal operation of sludge digestion tank may produce negative effects. It is necessary to emphasize the sewage treatment in the coarse and fine grids and sinking sand pool.
   When entering the digester sludge contains large amounts of scum, along with the increase of amount of sludge, a large amount of dross into the digester, and gradually form a thick layer of scum in the digester biogas accumulation in soil, the scum layer, with the increase of gas flow, the scum layer will break through in a moment, the pressure exceeds the digester safety valve maximum limit. To solve this problem, should try to remove the slag in the sewage treatment process, sand, to improve the wastewater treatment of sludge. In section deslagging process relative section sewage treatment sludge treatment, the treatment is difficult, and the investment is large, as in the sludge treatment is additionally arranged at the front end of fine grid and in a homogeneous pool, primary sludge sludge inlet pipe is additionally arranged on the sludge cutting machine, in the remaining sludge concentration and sludge filtration room room is arranged beside the reserved area, adding sludge cutting machine in the digester sludge circulating pump front.
   3. Guarantee dispoal effect of sludge thicking and the quality of mud fed of digestion system
   According to the situation of sludge digestion system and biogas desulfurization processing apparatus 2 months of continuous running debugging, in the technology section of the stable operation of sewage treatment, primary sludge into sludge digestion system, and as far as possible to adopt the uniform delivery; it is necessary to ensure access to the digested sludge treatment system of sludge solids content to reach design requirements of 5% through operation optimization of gravity concentration and centrifugal concentrators, and homogenizing pool mixing to ensure the digested sludge treatment system sludge inlet quality.
   4. Strengthen sludge digestion running adjustement to guarantee normal running of digestion system 
    Sludge digestion system and processing system to ensure that the biogas test operation, give full play to the sewage pretreatment function at the same time, the need to strengthen the regulation of sludge digestion process, inhibit the negative effects of scum treatment of sludge digestion, try to reduce the floating slag in the digester liquid concentration stratification, prompted in part of scum organic matter effectively degradation in the digester, to gradually realize the extension of scum discharging time, inhibit the decrease has entered the digestion tank of scum sludge digestion system. Strengthen the observation of the impact of sand and sludge digestion process in the digestive system, need more sand operations to digester process pipeline through the actual operation, which part of the inorganic sand as far as possible from the digestion tank.
5. Consider sludge disposal comprehensively and fully play the function of sludge disposal system 
  Suggestions on sludge disposal system after considering comprehensive running situation:
A. Strengthen monitoring of liquid sludge source, as far as possible to avoid of liquid sludge treatment system of the impact load. Gravity thickener, the stable operation of the centrifugal concentrator and a centrifugal dewatering machine and recovery of solid rate of sludge treatment system of normal operation is very important.
B. Try to reduce the sludge digestion tank discharge frequency. Even though scum discharging, but also try to peak discharge, both to arrange in concentration and dewatering operation conditions are stable under the conditions of implementation, but also to cross, thus effectively avoid sludge digestion tank scum discharging of liquid sludge treatment system the impact load, guarantee normal operation of the sludge treatment device.
C. Take into consideration the sludge concentration, dehydration treatment facilities in operation and the operation of the system, to enter the stable sludge liquid water quantity and water quality, reduce water quantity and water quality changes resulting from the impact load. As far as possible the continuous operation to reduce the hydraulic loading, help to improve the treatment effect.
D. Liquid sludge treatment system debugging, the need to run the overall consideration of the amount of pollutants in the influent the polymerization aluminum chloride dosage and the amount of mud and according to water pollutants amount of appropriate and timely adjustment polymerization aluminum chloride and dosage and the amount of mud, to ensure that the system of pollutant treatment effect. During the course of debugging, the dosage is lower than the design value, according to water quality increase of coagulant dosage, and a corresponding increase mud weight (row to the mud storage tank).
   F. In view of the dosing system processing of liquid for liquid sludge, the flow changes, and phosphorus, SS concentration of pollutants such as changes in large, with the domestic many similar projects polymerization aluminum chloride application. How to according to the water quality of liquid, water change real-time determine the appropriate dosage, only through the instrument is controlled by automatic dispensing scheme is not conducive to the appropriate dosage dosage and stable, reliable operation. Therefore, the daily running of the system need to strengthen water quality monitoring, cast a reasonable dosage, to in order to ensure the treatment effect at the same time, reduce drug dosage, low operation cost of the system.
6. According to the requirement of sludge drying system, the drying and cooling water treatment system is running. The result of the dry cooling water treatment system meets the requirement according to the dosage of coagulant and the actual situation of the field.
7. Maintain all kinds of safety facilities and ensure the safety and reliability of sludge treatment works.
8. Increase the failure prone sludge treatment equipment spare parts, spare parts.
9. Research and application of new technology of sludge treatment at home and abroad, pay attention to the new trend of the field of sludge treatment.
   Sewage treatment plant is a large mud production, is located in the root of sludge treatment and sludge disposal problem and sludge disposal enterprise owners. Sewage treatment plant sludge treatment not only need to improve the sewage treatment process, attention to the sewage treatment process, reduce the amount of sludge produced, also need to better sludge treatment scheme to ease the difficult problems of sludge disposal, with mutual cooperation.
 
 

：Characteristics and resource analysis of liquor waste water ：Methods exploration of chemical fiber sludge