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Environmental biotechnology has emerged as an important measure to tackle the environmental pollution as China experiences great economic success. Over the past decade, much emphasis has been paid to the following fields in environmental biotechnology: microbial degradation of toxic and organic chemicals, bio-treatment of wastewater, waste recycling. The Chinese researchers have done a lot of work...
Perfluorooctane sulfonate (PFOS) has increasingly attracted global concerns in recent years and has also been proposed as the candidates of persistent organic pollutants due to their world-wide distribution, environmental persistence and bioaccumulation potential. The adsorption mechanism of PFOS from aqueous solutions onto granular activated carbon (GAC) was investigated. The adsorption reaction...
This paper investigated the influence of pH on short-chain fatty acids (SCFAs) production and constituents with anaerobic fermentation of primary sludge from a Chinese wastewater treatment plant (WWTP). Controlled and uncontrolled pH experiments were conducted in ten completely mixed bench-scale reactors. Results showed that pH significantly influenced on the SCFAs yields and constituents from primary...
The feasibility of powdered activated carbon (PAC) as an adsorbent to eliminate the perfluorooctanoic acid (PFOA) in the water for reuse has been studied. PAC exhibits a high affinity to adsorb PFOA on its surface. More than 95% of PFOA can be adsorbed onto PAC surface at the first hour. For common reuse water, the most optical PAC concentration was 0.125 g/L. As illustrated by IR spectra, PAC is...
Two activated sludge was acclimatized respectively with a lower and a higher ratio of propionic/acetic acid wastewater (i.e. biomass A and biomass P), and the effect of biomass acclimatization on enhanced phosphorus biological removal from acetic acid enriched wastewater was investigated. Due to biomass P having a higher biomass polyphosphate content, less glycogen degradation, and probably greater...
A new cleaner technology for the recovery of poly(3-hydroxybutyrate) (PHB) from Alcaligenes eutrophus is reported. This involves continuously using the recycle-wastewater combined with small additions of surfactant and chelate to recover PHB, treating the final wastewater with hydrochloric acid and activated carbon when the purity of recovered PHB was decreased to less than 96%, which was called one...
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