The Development And Experimental Study Of The Integrated Water Purifying Equipment With The Same Direction Of Flowing Inclined Plate Sedimentation

In a small to supply water treatment equipment, the integration of waterpurification equipment is including coagulation, sedimentation and filtration. Thisequipment applies as drinking water treatment in our country where are small towns,rural areas, and some scattered large industrial and mining enterprises and so on. Inrecent years, with the rapid development of China’s urbanization and new rural, as wellas the full implementation of the new " Standards for drinking water quality "（GB5749—2006）, The effluent quality where is from the existing integration of waterpurification equipments is difficult to guarantee the safety of the residents of smalltowns and rural areas use as drinking water, more and more small towns, especially inrelatively backward residents of small towns and rural areas in the southwest drinkingwater safety is seriously threatened. Thus, research and development of new smallintegrated water purification equipment suitable for the region has a very importantsignificance.This paper is focused on the develop a new integrated water purification equipment,and it is strengthening grid flocculation, same flow oblique board sedimentation basin,sand filtration set in one-small equipment. The independent development of same flowoblique board sedimentation has many advantages such as simple structure, easymanufacturing, high volume utilization, high effective precipitation and great surfaceload and so on. In this paper, the design parameters and manufacture of same flowoblique board sedimentation is described in detail, and the design parameters ofstrengthening grid flocculation and sand filtration process is analyzed, besides, the texteffect is analyzed according to the Yangtze river water of Chongqing section.In a design flow of10m³/h, the turbidity of raw water as433²072NTU, PACdosage as20³0mg/L, the turbidity of sedimentation effluent as3.48⁶.92NTU, theturbidity of filtration effluent as0.27⁰.72NTU, the removal rate more than99%; TheCOD_Mn of raw water as1.96⁷.88mg/L, the COD_Mn of filtration effluent as0.74¹.88mg/L, the removal rate as62.24%⁷6.14%; The UV254of raw water as0.033⁰.071Abs.cm^-1, The UV254of filtration effluent as0.018⁰.034Abs.cm^-1,removal rate as45.45%⁵2.11%.In a design flow of10m³/h, the turbidity of raw water as37¹46NTU, PACdosage as10²0mg/L, the turbidity of sedimentation effluent as2.24⁴.38NTU, Average removal rate as93.4%, the turbidity of filtration effluent as0.08⁰.34NTU,the removal rate more than99%; The COD_Mn of raw water as0.94¹.82mg/L, theCOD_Mn of filtration effluent as0.68⁰.94mg/L, the removal rate as27.08%⁵0%;The UV254of raw water as0.021⁰.036Abs.cm^-1, The UV254of filtration effluent as0.016⁰.021Abs.cm^-1,removal rate as23.81%⁴2.86%.In a design flow of10m³/h, the average turbidity of raw water as850NTU, thefirst and second flocculation zone that shared buckets is discharge sludge every6hours,each lasting about5s; The third and fourth flocculation zone that shared buckets, andthe tube of sedimentation are discharge sludge every3hours, each lasting aboutrespectively10s and30s; we can also be judged based on theoretical calculations andfield effluent quality to discharge sludge.The paper developed integrated water purification equipment at the design flowrate of10m³/h and the market price of the context in2012that is a one-time investmentof108,530yuan, disposable unit investment of452.21yuan/（m³/d）; unit operatingcosts of0.375yuan/（m³/d）.