Carbon-to-nitrogen and substrate-to-inoculum ratio adjustments can improve co-digestion performance of microalgal biomass obtained from domestic wastewater treatment
Carbon-to-nitrogen and substrate-to-inoculum ratio adjustments can improve co-digestion performance of microalgal biomass obtained from domestic wastewater treatment
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DOI：
10.1080/09593330.2017.1398784
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发表时间：
2019-02-23
影响因子：
2.8
通讯作者：
Demirer, Goksel N.
中科院分区：
文献类型：
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作者：
Calicioglu, Ozgul;Demirer, Goksel N.
本研究比较评估了共基质对厌氧消化（AD）和生化甲烷潜力的废水衍生的微藻生物量，重点是碳-氮（C：N）和基板接种（S：I）比的影响。在半连续式光生物反应器中接种小球藻，研究其营养盐回收潜力。在不存在和存在共基质的情况下，使衍生的微藻浆料经受AD;模型厨房废物（MKW）和废物活性污泥（WAS）。结果表明，C.普通的通过与MKW和WAS两者共消化来提高生物甲烷产率。在初始化学需氧量（COD）浓度为14.0 +/- 0.1 g l（-1）、C：N比为22.0和S：I比为2.2时，通过微藻生物质和MKW以50：50的比例共消化，观察到最大生物甲烷产率为523 +/- 25.6 ml CH 4 g VSadded-1。所观察到的生物甲烷产率比单消化高80.7%。通过微藻生物质和WAS的50：50共消化实现的最高改善为15.5%，在初始COD浓度为14.0 +/- 0.1 g l（-1）、C：N比为13.0和S：I为2.3时，生物甲烷产率为272 +/- 11.3 ml CH 4 g VSadded-1。
This study comparatively evaluated the effect of co-substrates on anaerobic digestion (AD) and biochemical methane potential of wastewater-derived microalgal biomass, with an emphasis on carbon-to-nitrogen (C:N) and substrate-to-inoculum (S:I) ratios. A semi-continuous photobioreactor was inoculated with Chlorella vulgaris and the nutrient recovery potential was investigated. Derived microalgal slurry was subjected to AD in the absence and presence of co-substrates; model kitchen waste (MKW) and waste activated sludge (WAS). The results revealed that up to 99.6% of nitrogen and 91.2% of phosphorus could be removed from municipal wastewater using C. vulgaris. Biomethane yields were improved by co-digestion with both MKW and WAS. The maximum biomethane yield was observed as 523 +/- 25.6 ml CH4 g VSadded-1, by microalgal biomass and MKW co-digestion in 50:50 ratio, at an initial chemical oxygen demand (COD) concentration of 14.0 +/- 0.1 g l(-1), C:N ratio of 22.0, and S:I ratio of 2.2. The observed biomethane yield was 80.7% higher than that of the mono-digestion. The highest improvement achieved by 50:50 co-digestion of microalgal biomass and WAS was 15.5%, with biomethane yield of 272 +/- 11.3 ml CH4 g VSadded-1 at an initial COD concentration of 14.0 +/- 0.1 g l(-1), C:N ratio of 13.0, and S:I of 2.3.