Co-treatment of old landfill leachate and municipal wastewater in sequencing batch reactor (SBR): effect of landfill leachate concentration

IF 2 Q3 Environmental Science

Water Quality Research Journal of Canada Pub Date : 2016-11-02 DOI:10.2166/WQRJC.2016.020

K. Ranjan, Shubhrasekhar Chakraborty, Mohini Verma, J. Iqbal, R. N. Kumar

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引用次数: 19

Abstract

Sequencing batch reactor (SBR) was assessed for direct co-treatment of old landfill leachate and municipal wastewater for chemical oxygen demand (COD), nutrients and turbidity removal. Nitrogen removal was achieved by sequential nitrification and denitrification under post-anoxic conditions. Initially, SBR operating conditions were optimized by varying hydraulic retention time (HRT) at 20% (v/v) landfill leachate concentration, and results showed that 6 d HRT was suitable for co-treatment. SBR performance was assessed in terms of COD, ammonia, nitrate, phosphate, and turbidity removal efficiency. pH, mixed liquor suspended solids, mixed liquor volatile suspended solids (MLVSS), and sludge volume index were monitored to evaluate stability of SBR. MLVSS indicated that biomass was able to grow even at higher concentrations of old landfill leachate. Ammonia and nitrate removal efficiency was more than 93% and 83%, respectively, whereas COD reduction was in the range of 60–70%. Phosphate and turbidity removal efficiency was 80% and 83%, respectively. Microbial growth kinetic parameters indicated that there was no inhibition of biomass growth up to 20% landfill leachate. The results highlighted that SBR can be used as an initial step for direct co-treatment of landfill leachate and municipal wastewater.

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序批式反应器(SBR)处理旧垃圾渗滤液与城市污水:渗滤液浓度的影响

采用序批式反应器(SBR)直接共处理垃圾渗滤液和城市污水，对化学需氧量(COD)、营养物和浊度的去除效果进行了评价。在后缺氧条件下，通过顺序硝化和反硝化实现脱氮。首先，在垃圾渗滤液浓度为20% (v/v)的条件下，通过改变水力停留时间(HRT)对SBR操作条件进行优化，结果表明，HRT为6 d为宜。从COD、氨、硝酸盐、磷酸盐和浊度去除效率等方面评价了SBR的性能。通过对pH、混合液悬浮物、混合液挥发性悬浮物(MLVSS)、污泥体积指数的监测，评价SBR的稳定性。MLVSS表明，即使在高浓度的旧垃圾填埋场渗滤液中，生物质也能生长。氨氮和硝酸盐的去除率分别大于93%和83%，COD的去除率在60-70%之间。磷酸盐和浊度去除率分别为80%和83%。微生物生长动力学参数表明，当垃圾渗滤液浓度达到20%时，对生物质生长没有抑制作用。结果表明，SBR可作为垃圾渗滤液与城市污水直接共处理的初始步骤。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Water Quality Research Journal of Canada WATER RESOURCES-

CiteScore

1.70

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： The Water Quality Research Journal publishes peer-reviewed, scholarly articles on the following general subject areas: Impact of current and emerging contaminants on aquatic ecosystems Aquatic ecology (ecohydrology and ecohydraulics, invasive species, biodiversity, and aquatic species at risk) Conservation and protection of aquatic environments Responsible resource development and water quality (mining, forestry, hydropower, oil and gas) Drinking water, wastewater and stormwater treatment technologies and strategies Impacts and solutions of diffuse pollution (urban and agricultural run-off) on water quality Industrial water quality Used water: Reuse and resource recovery Groundwater quality (management, remediation, fracking, legacy contaminants) Assessment of surface and subsurface water quality Regulations, economics, strategies and policies related to water quality Social science issues in relation to water quality Water quality in remote areas Water quality in cold climates The Water Quality Research Journal is a quarterly publication. It is a forum for original research dealing with the aquatic environment, and should report new and significant findings that advance the understanding of the field. Critical review articles are especially encouraged.