污泥課_文獻(xiàn)PPT

1、,Feedstock quality and growth of bioenergy crops fertilized with sewage sludge,Contents,Introduction,Materials and methods,Results,Discussion,Introduction,The disposal of sewage sludge is a problem. Its utilization in food or fodder production is restricted because of the presence of heavy metals an

2、d metalloids.,Screen the plants for sensitivity at different sludge applications. In the end, the experimental plants are maize、hemp and oilseed.,Control the factors that affect the crop growing conditions, such as PH、organic matter content and redox conditions, and the PH is the most important and

3、manageable.,content,background,Way 1,Way 2,Materials and methods,Plant material and experimental design,Morpho-physiological measurements,.,Anova and program technology,Feedstock quality,1.Evaluate the impact of various amounts of sludge on bioenergy crop productivity and quality. 2.Evaluate the pea

4、t as an adjuvant to reduce the stickiness、density and nutrient richness of the sludge.,Plant material and experimental design,Seedlings are thinned to one per pot at 15 d after sowing.,Glass house,16h photoperiod. maize:21/19,60-70% oilseed:19/16 ,40-50% hemp:19/16 ,40-50%,1.0kg SS or 0.5kg + 0.5kg

5、SSP. On the top 5cm of 7L pots. 5kg find sandy soil.,Three seeds of maize or oilseed are sown in each pot.,one,Plant material and experimental design,Seedlings are thinned to 10 oilseeds 3 hemps per pot 15 d after sowing.,0.66kg HSS or 0.33kg LSS or 0.33kg+0.33kg SSP At the top 5 cm of 5Lpots 3.33kg

6、 fine sandy soil,20 seeds of oilseed or ten seeds of hemp are sown.,two,Glass house,16h photoperiod. maize:21/19,60-70% oilseed:19/16 ,40-50% hemp:19/16 ,40-50%,Merpho-physiological measurement,w,s,turgor,Is measured at 29,44 and 59 DAS from the uppermost fully expanded leaf.,Is analysed with a free

7、zing point depression osmometer.,ws,w,turgor,s,Morpho-physiological measurement,ThemeGallery is a Design Digital Content Put into in a muffle furnace for 18h at 600(w2); W2/w1,Elemental analysis,ash,Cl,Results,1.Effect of sludge on feedstock quality (heavy metal and metalloid),Results,1.Effect of sl

8、udge on feedstock quality (trace element ),Results,2. Effect of sludge on morpho-physiological parameters,Results,Sludgepeat mixapplication resulted in the highest amount,2. Effect of sludge on morpho-physiological parameters (leaf area and biomass),Discussion,result from increased concentrations of

9、 extractable metals in the soil treated with sludge,Zn concen-tration was the highest in the sludge Zn has a lower affinity for organic matter,its accumulation of heavy metals and metalloids gives maize a better phytoremediation potential than hemp and oilseed rape.,The highest sludge the highest he

10、avy metals and metalloids,The highest Accumulation of Zn in plant tissue for all species,maize generally accumulated more Cr, Ni and Zn than others,Discussion,Cl, K, S,Si ,ash content decreased,Thus, maize biomass has the optimal C/N ratio for methane production,reduce the slagging ,corrosion proble

11、ms ,HCl emissions,the best quality of the feedstock for bioenergy uses,With sludgepeat mix application,the average ratio of carbon to nitrogen was in maize 28,Maize biomass had the highest N,Discussion,with the high amount,Heavy metals in soil and in plant w and s,an energy-consuming process requiri

12、ng assimilated N and carbohydrates,the inhibition of stress-related osmotic adjustment,accumulation of heavy metal net photosynthesis,the inhibition of photosynthetic rate,Sludgepeat mix application led to highest leaf area formation and biomass accumulation in maize and hemp (the lowest heavy metals),Conclusions,Mixing sludge with peat evidently improved the characteris