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The traditional nitrogen removal processes do not meet increasingly stringent discharge standards and sustainable demands. A novel, economical and efficient process was originally discovered in a denitrifying pilot plant reactor, namely anaerobic ammonia oxidation. Some significant advantages make the anammox be a milestone in the field of wastewater treatment and attract much attention, such as low...
The occurrence of heavy metals in our water resources is of continued concern for the health and safety of consuming public. The existing conventional water treatment plants may only partially remove heavy metals, a large fraction of the metals are released to the aquatic environment. Recently, activated sludge emerged as an eco-friendly bioadsorbent, is effective and low cost material option on the...
Low carbon and phosphorus concentrations were controlled to investigate their influences on nitrogen removal in activated sludge reactors. Results demonstrated that when the initial COD/ NH4+-N (C/N) ratio was adjusted to 4/1, NH4+-N removal efficiency achieved the maximum value of 93.0%. With the rising of C/N ratio, total nitrogen (TN) removal efficiencies increased gradually while NH4+-N removal...
Bacillus subtilis (B. subtilis) is a kind of Gram positive bacteria possessing multiple enzyme systems, which might be useful in wastewater treatment. In this paper, in order to confirm whether Bacillus subtilis BS7.29, a novel strain isolated from soil in our previous work, could be applied in the wastewater treatment, its effects on assimilation of ammonium, transformation of nitrite, and degradation...
Pectate lyase obtained the wide-spread application in the Chinese traditional medicine extraction because it can remarkably reduce impurity content and viscosity of the plant materials. However the low enzyme activity and monoicous species hindered the application of enzymatic method to the extraction process of the herbal medicine. In this paper, we constructed a engineering strain which can overexpressed...
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