Intended process water management concept for the mechanical biological treatment of municipal solid waste

Weichgrebe, Dirk; Maerker, S.; Böning, T.; Stegemann, Hermann

doi:10.1016/s1674-2370(15)30020-x

Cited by 1 publication

(2 citation statements)

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“…In order to achieve optimum process conditions, the biodegradable fraction of the MSW going to anaerobic digestion must first be suspended in, or moistened with water, leading to significant freshwater requirements -from 0.4 to 0.6 m 3 per tonne of waste, for dry or wet fermentation, respectively [7]. In addition to the process water from (i) anaerobic digestion, the other main sources of process water streams are: (ii) leachate from intensive rotting, (iii) pressing water from digestate dewatering and (iv) condensates and/or scrubber water from the exhaust treatment [7].…”

Section: Introductionmentioning

confidence: 99%

“…In addition to the process water from (i) anaerobic digestion, the other main sources of process water streams are: (ii) leachate from intensive rotting, (iii) pressing water from digestate dewatering and (iv) condensates and/or scrubber water from the exhaust treatment [7]. However, unlike the gaseous emissions and the stabilized solid output, the literature lacks on information regarding the characteristics and subsequent treatment of the liquid effluent with high pollutant loads resulting from the process water streams of MBT plants for MSW [7].…”

Section: Introductionmentioning

confidence: 99%

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Hybrid magnetic graphitic nanocomposites towards catalytic wet peroxide oxidation of the liquid effluent from a mechanical biological treatment plant for municipal solid waste

Ribeiro

Rodrigues

Silva

et al. 2017

Applied Catalysis B: Environmental

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a b s t r a c tMagnetite, nickel and cobalt ferrites were prepared and encapsulated within graphitic shells, resulting in three hybrid magnetic graphitic nanocomposites. Screening experiments with a 4-nitrophenol aqueous model system (5 g L −1 ) allowed to select the best performing catalyst, which was object of additional studies with the liquid effluent resulting from a mechanical biological treatment plant for municipal solid waste. Due to its high content in bicarbonates (14350 mg L −1 ) and chlorides (2833 mg L −1 ), controlling the initial pH was a crucial step to maximize the performance of the catalytic wet peroxide oxidation (CWPO) treatment. The catalyst load was 0.5 g L −1 , a very low dosage when compared to the high chemical oxygen demand (COD) of the effluent − 9206 mg L −1 . At the optimum operating pH (i.e., pH = 6), ca. 95% of the aromaticity was converted and ca. 55% of COD and total organic carbon (TOC) of the liquid effluent was removed. The biodegradability of the liquid effluent was enhanced during the treatment by CWPO, as reflected by the 2-fold increase of the five-day biochemical oxygen demand (BOD 5 ) to COD ratio (BOD 5 /COD), namely from 0.21 (indicating non-biodegradability) to 0.42 (suggesting biodegradability of the treated wastewater). In addition, the treated water revealed no toxicity against selected bacteria.Lastly, a magnetic separation system was designed for in-situ catalyst recovery after the CWPO reaction stage. The high catalyst stability was demonstrated through five reaction/separation sequential experiments in the same vessel with consecutive catalyst reuse.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%