Zhou Yuexi

Technology progresses of swine wastewater treatment from large-scale pig farms

For the large-scale swine wastewater with the characteristics of high concentration of organic matter, suspended solids and more high ammonia nitrogen, odor, complex pollution ingredient and large emissions, combined with Chinese national conditions, adapting conditions and characteristic of the three of back-to-field mode, ecological processing mode and bio-processing mode are analyzed. Meanwhile, it is proposed that the development direction and main problems of the current swine wastewater treatment.

Pretreatment of the wastewater from acrylonitrile-butadiene-styrene (ABS) resin manufacturing by Electro-Fenton

The wastewater from the condensing and drying section of acrylonitrile-butadiene-styrene (ABS) resin manufacturing was pretreated by Electro-Fenton, and the decomposition and transformation of the toxic and refractory typic pollutants was studied seriously. The results show that the COD removal efficiency was the highest of 45.62% with the iron concentration of 0.6 mmol/L. And a plenty of aromatic pollutants in the ABS resin wastewater were decomposed or tranformed efficiently by Elentro-Feton.

Treatment of wastewater from acrylonitrile-butadiene-Styrene (ABS) resin manufacturing by biological activated carbon (BAC)

The wastewater originated from the production of acrylonitrile-butadiene-Styrene (ABS) resin was treated by biological activated carbon (BAC) to investigate the characteristics of adsorption and biodegradation of BAC for ABS resin wastewater and the removal mechanism of the organic pollutants. The results suggested that bioregeneration was the key to BAC, and it could make BAC reach more than 80% of COD, TOC and total kjeldahl nitrogen (TKN) removal efficiency after the 100th run. Abundant microorganisms were observed on the surface of BAC including long-stem bacteria, vorticella and coccise, which indicated that BAC could protect the microorganisms from the shock loadings of toxic, refractory and complicated ABS resin wastewater.

Simultaneous biological removal of nitrogen and phosphorus in a novel internal-loop A/O/IAT-IAT process

A novel wastewater biological treatment process, internal-loop Anaerobic/Oxic/double Intermitted Aerobic Tank (A/O/IAT-IAT), was investigated for simultaneous removal of nitrogen and phosphorus. Satisfactory nitrogen and phosphorus removal performance was achieved in both lab scale reactor and pilot plant. Over 90% removal efficiencies were accomplished in the experiments with average effluent concentration of NH4+-N and PO43--P being 2.5 mg/L and 0.1 mg/L receptively.

Treatment of Acrylic Fiber Wastewater Treatment Using Combined Process of Iron Carbon Micro-electrolysis and SBBR

The experiment used the iron carbon micro-electorlysis combined with sequencing batch biofilm reactor(iron carbon micro-electorlysis¡ªSBBR) process to treat acrylic fiber wastewater. The iron carbon micro-eletrolysis¡ªSBBR process could make the COD of acylic fiber wastewater from 550~700mg/L down to 140~165mg/L or so, and the removal rate of DMAC and acrylonitrile could respectively reach to 97.8% and 100%. After long-term of operation, it was observed that the predominant microorganisms immobilized on the SBBR carriers were bacillus, filamentous fungus, and a small amount of coccus.