一、Product Introduction

1.   Briefly

As a new type of artificial land treatment system, the special modular structure of the Solar energy-multi-soil-ayer (S-MSL) treatment process can well overcome the shortcomings of the traditional soil infiltration system, such as low hydraulic load, low nitrogen and phosphorus removal rate and easy blockage. It is mainly composed of artificially configured mixed special soil blocks stacked layer by layer, leaving a certain void between them to fill with new fillers, natural zeolite or coke with strong adsorption properties. The S-MSL system uses solar energy for all kinetic energy, and the system has a BOD5 removal rate of more than 80%, and also has a strong ability to remove nitrogen and phosphorus pollutants, in addition, the system can operate continuously for a long time without the need to regenerate or replace soil blocks. This technology is mainly suitable for rural sewage treatment, landscape water maintenance, lake and river ecological restoration and maintenance.

2. Process characteristics
l Solar energy is used for energy supply with lithium battery

l The system is divided into zeolite bed, activated coke (or activated carbon) adsorption filter bed, and composite percolated sand bed, which can remove target pollutants of different properties in sewage in a targeted manner

l The multi-stage soil percolation system has a higher hydraulic load and higher pollutant load than the simple constructed wetland system or soil percolation system, and the floor space is reduced under the same treated water volume

l The use of micro aeration system can improve the efficiency of pollutant removal and solve the problem of easy blockage of the seepage bed

l Plant growth on the surface of the system, on the one hand, the plant root system can play the function of purifying water quality, and on the other hand, it can play a role in beautifying the environment in a certain sense

l The system does not produce activated sludge, saves the treatment cost of activated sludge, and will not cause secondary pollution to the environment caused by improper disposal of activated sludge

l Low construction investment cost; The operating cost is low, and the operating cost per ton of water of the system is less than 0.15 yuan

l The effluent effect is good, and the effluent quality can meet the first-class A standard of the "Discharge Standard for Pollutants of Urban Sewage Treatment Plants" (GB18918-2002) or the water quality standard of landscape and greening reuse

l According to the unit processing capacity, it is designed into a standard modular equipment, which is easy to transport and easy to install on site

二、Process

1.   Process flow diagram

图1污水处理系统流程图

2.   Process flow description

This technology is mainly suitable for rural sewage treatment, landscape water maintenance, lake and river ecological restoration and maintenance, etc. Its organic concentration and suspended solids are not high, if the traditional sewage treatment process is adopted, the process flow is long and covers a large area, the energy consumption is high, combined with the actual situation of the project, the ecological treatment process can be well combined with the natural geographical conditions of the vast rural areas, such as local waste ponds, tidal flats, abandoned land, so the infrastructure investment is low; There is no need to add chemicals during the operation process, and the operating cost is low; The sludge yield is small, and proper treatment can also meet the agricultural reuse standard and reduce secondary pollution; The process operation is relatively stable, the impact load resistance is strong, and the sewage can be stably discharged up to the standard, and the effluent can be directly reused for farmland irrigation or rural miscellaneous water.

Wastewater enters the pretreatment system through the collection system, the pretreatment system includes a conventional coarse and fine grid, a grit tank and a regulating tank, removes larger debris through the grid, and then the sewage enters the primary sedimentation tank for the preliminary separation of mud water and sand water, the sedimentation tank is configured with dosing and precipitation according to the needs of the water quality, the precipitated sludge is stored in the sludge drying tank and treated regularly, the upper supernatant flows into the regulating tank for water quality and quantity storage, and then the wastewater continues to enter (S-MSL) every day for purification, After the wastewater enters the zeolite bed, activated coke (or activated carbon) adsorption filter bed and composite percolated sand bed of the system, the organic matter and nitrogen and phosphorus pollutants are removed. After the S-MSL effluent, it enters the horizontal underflow constructed wetland system, and the final effluent quality meets the first-class A standard of the "Pollutant Discharge Standard for Urban Sewage Treatment Plants" (GB18918-2002). Since the water inlet of the system is intermittent, and the water inlet time is 4~8 hours per day, the lifting pump mainly relies on solar power generation equipment to reduce energy consumption and save costs. For areas where gravity flow is available, the water is distributed in full gravity flow in a stepped arrangement.

三、Equipment advantages

As a new type of sewage ecological treatment process, the S-MSL system makes full use of the purification capacity of the "filler-microorganism" system, with high pollutant removal efficiency and stable effluent quality. Secondly, it has a wide range of applications, and according to its characteristics, it is very suitable for areas and small and medium-sized towns that do not have a complete sewage pipe network system.

1.   The water effect is good

After the treatment of the S-MSL system, the effluent quality can reach the first-class A standard of the "Discharge Standard for Pollutants in Urban Sewage Treatment Plants" (GB 18918--2002).。

2.Low construction and operation costs

There is no energy consumption for large amount of aeration and sludge and nitrification reflux of traditional processes.

3.   Strong resistance to shock loads

The sudden change in water quality and quantity in a short period of time will not affect the normal operation of the system, and the effluent is still stable. After stopping operation for a long time, it can quickly resume normal operation after 3 to 5 days of drying maintenance.

4.   Convenient operation and management

The process flow is simple, no aeration, no sludge reflux, no treatment of activated sludge, only a small number of pumps and valves for maintenance, simple and convenient, avoiding the cost of building sludge treatment facilities.

5.   No secondary pollution is produced

It does not produce residual activated sludge, saves the treatment cost of residual activated sludge, and will not cause secondary pollution to the environment caused by improper disposal of residual activated sludge.