alexa Improvement in post-treatment of digested swine wastewater.
Environmental Sciences

Environmental Sciences

International Journal of Waste Resources

Author(s): Deng L, Zheng P, Chen Z, Mahmood Q

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Abstract The performance of sequencing batch reactor (SBR) during post-treatment of digested effluent of swine wastewater was investigated. While operating SBR to treat the digested effluent directly, the performance was very poor with COD removal rate about 10\%, and NH4+-N removal rate nearly 50\%, with a scarce removal of total phosphorus. The performance apparently improved after adding raw swine wastewater or alkali to digested effluent. Although similar results for NH4+-N removal were achieved adopting both measures, the addition of raw wastewater proved superior in removing total nitrogen and total phosphorus. The addition of raw wastewater obtained effluent COD around 300 mg/L which was lower than that after alkali addition i.e. around 550 mg/L. Judged from the investment, oxygen demand, sludge yield, biogas production and running cost, the traditional combined anaerobic-SBR process is unfeasible to treat swine wastewater, while the combined anaerobic-SBR process with addition of raw swine wastewater can be a suitable biotechnology. This article was published in Bioresour Technol and referenced in International Journal of Waste Resources

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