Abstract:

In order to implement phosphorus removal at the same time when the process of anaerobic treatment of swine wastewater is on,the self-made and modified calcium silicate(MCS) has been prepared and its phase and microcosmic are characterized. Then,it is put into an anaerobic reaction system at work,so as to investigate its effects on the phosphorus removing effectiveness in the process of anacrobic treatment of swine wastewater. The results show that the prepared MCS has high purity and small particle size,and is hydrated calcium silicate single phase with semi crystal and low degree of order. The adsorption capacity for phosphorus is as high as 111.04 mg/g. It is important that the adding of MCS not only does not have any negative influence on the operation of UASB reaction and treatment effectiveness,but also can improve the sludge activity in the reactor,and greatly raise the phosphorus removing rate of the reactor to 99.5%. The phosphorus removing rate of the control group without adding any MCS is only 50%.

Key words: modified calcium silicate(MCS), livestock wastewater, anaerobic treatment, phosphorus removal

摘要：

为了实现在养殖废水厌氧处理的过程中同时除磷,自行制备改性硅酸钙(MCS),并对其物相和微观进行了表征;随后将其投加到正在运行的厌氧反应装置中,以考察其对养殖废水厌氧处理过程中除磷效果的影响。结果表明:制备的MCS纯度高、粒径小,为半结晶低有序度的水合硅酸钙单相,磷吸附量高达111.04 mg/g。重要的是,MCS的投入不仅未对UASB反应的运行和处理效果产生不良影响,而且可以提高反应器中污泥的活性,并可大幅提高反应器中磷去除率到99.5%,而未投加MCS的对照组中磷去除率仅为50%。

关键词: 改性硅酸钙(MCS), 养殖废水, 厌氧处理, 除磷

CLC Number: 

• X703.1