Guihao Han , Xiaoyan Ding , Zhisheng Liu , Gaige Liu , Xiangkun Li
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引用次数: 0
Abstract
Effluent from thermal hydrolysis pretreatment coupled anaerobic digestion (THP-AD) is characterized by high ammonia nitrogen, chemical oxygen demand (COD), and suspended solids (SS). In this experiment, the results of the CANON process for the treatment of unpretreated THP-AD effluent showed that five-fold dilution and no dilution of THP-AD effluent had serious inhibitory effects on ammonium oxidizing bacteria (AOB) and anaerobic ammonia-oxidizing (anammox) bacteria, while prolongation of the hydraulic retention time (HRT) could mitigate such inhibition caused by five-fold dilution. To alleviate this inhibition, an electrocoagulation combined with membrane filtration pretreatment strategy was developed, and the removal rates of COD and SS were 61.8 % and 100.0 %. The PN/A system achieved 83.5 % total nitrogen removal from the pretreated diluted triple THP-AD effluent, but 44.3 % total nitrogen removal from the pretreated undiluted THP-AD due to inhibition of soluble and refractory COD. Nitrosomonas and Candidatus_Kuenenia were the major AOB and anammox bacteria in the PN and A reactors respectively. The abundance of both groups declined with the increased THP-AD effluent proportion in the feed. Overall, this study provides a guide to develop the energy-efficient PN/A process for THP-AD effluent treatment.
期刊介绍：
The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies
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