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This paper discusses the research of integrating and implementing current technologies to detect urine patches. Currently, cattle urine is damaging the agricultural industry and poses an increasing threat to the environment. Farmers invest a lot of money treating urine patches and nitrate leaches into waterways, which pollutes drinking water and causes fish to die. Current methods are slow and inefficient...
Contamination is a growing problem affecting irrigation water. The objective of this research was to evaluate the effect of two sources of irrigation water, clean one and sewage; and organic matter on the association with Glomus intrarradices on beans (Phaseolus vulgaris L.). Sixteen soil sample wells were located using GPS in a digital orthopicture from the Mexican Institute of Geography and informatics...
Through soil-column leaching experiment in laboratory, migration and transformation rule of nitrogen in different groundwater level dynamic under rainfall condition was studied. Using two groups of the same device, column I (water level rising) and column II(water level stability) at the same time simulate water level rise and stability to get the change of NO3--N, NO2--N and NH4+-N concentration...
Non-point source pollution has became a major water pollution source in Northeast China. A small typical agricultural watershed was selected to test the validity of the annualized agricultural non-point source (AnnAGNPS) model in Northeast China. The best available data were assembled in the analysis. The model validity was tested by nitrogen and phosphorus concentration data. A good correlation was...
To reveal the migration and transformation rule of nitrogen in the vadose zone and groundwater and to determine the migration mathematical model, we researched the migration and transformation rule of ammonia nitrogen, nitrate nitrogen, nitrite nitrogen in the vadose zone and groundwater by the soil column leaching experiment. The results indicate: using ammonium bicarbonate shows a stronger alkalinity...
Riparian buffer strip plays an important role in preventing agricultural non-point pollution and protecting river quality. Purification effect of nitrogen and phosphorus in Nongjiang river was studied by selection of a typical sampling transect, five sampling sites were selected along the sampling transect. Every two neighbouring sampling sites formed a buffer substrip and four buffer substrips were...
Selection of filter materials in constructed wetlands used for eutrophic water treatment was studied. Volcanic rock, ceramsite, composite soil and gravel were chosen for experiment. Esothermal adsorption tests demonstrated that volcanic rock and ceramsite had good adsorption capacity of ammonia nitrogen while composite soil and ceramsite had good adsorption capacity of total phosphorus (TP). Continuous...
By investigating the nitrogen concentrations in effluents of the horizontal subsurface-flow constructed wetlands under the conditions of different kinds of substrates, residence time and heights, as well as the nitrogen concentrations changes along the flow in the wetlands, the nitrogen removal routes in the wetlands were analyzed. The results demonstrated that the wetland system with zeolites demonstrated...
In order to promote regional sewage pipe network and sewage incomplete dispersion area sewage treatment, biological purification and filtration combined with underground, a small modular ecological design of sewage treatment facilities. In the winter day the water content of 100L/d under the conditions studied the effects of their purification. The results showed that, when COD, NH4+-N, TP influent...
Compared study on the purification efficiencies and the different of three substrates and nine plants for surface flow wetlands. The results showed that: (1) substrates absorption test, the best absorption efficiencies on ammounia, total nitrogen(TN) and total phosphrus were obtained from the soil and the combined substrate of the soil and the bottom sludge, respectively; (2) the removal efficiencies...
This research studied enhanced treatment of sewage from channel discharge with enzyme and the effect of enzyme-biofilm process on the treatment of sewage from channel discharge, and investigated the changes of removal rates of the main pollution indexes at different hydraulic retention time (HRT) to ensure the optimal HRT. Meanwhile, compared the difference between the laboratory developed compounded...
The research studied enhanced treatment of sewage from discharging points of rivers by biofilm process dosing with enzyme and the effect of phenol on removal rates of the main pollution indexes, and investigated promotion effect of enzyme (including the laboratory developed compounded enzyme and the foreign composite enzyme) on treatment of sewage by biofilm process. The research results indicated...
With investigation in field and assay in the lab, the current situation and influencing factors of groundwater nitrate nitrogen (hereinafter referred to as NO3- - N) content in the regions surrounding Bohai Sea in Hebei province were studied. The results show that the contents of groundwater NO3- - N in the regions generally meet the level III criterion of GB/T14848-93. However, the spatial variability...
A small watershed in Zhongxian, Chongqing, was chosen to study the soil phosphorus content distribution in sloping field of different planting modes and assess the loss risk. The results were as follows:(1) In 2009, the average content of total soil phosphorus, available phosphorus and water soluble phosphate were 0.54±0.18 g/kg, 32.14±32.63 mg/kg and 2.46±2.21 mg/kg. The total phosphorus content...
In order to study potential contamination risk caused by leaching from bareroot seedling nursery to local ground waters, leaching of mineral nitrogen (N) and available phosphorus (P) was quantified in production of bareroot Changbai larch (Larix olgensis) seedlings, which is a common and economical tree species for afforestation and regeneration in North-eastern China. Experiment with 5 fertilization...
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