Design and Operation of a High Strength Organic Wastewater Treatment System to Approach Zero Net Sludge Production at a Specialty Chemical Plant

Rozich, Alan F.; Colvin, Richard J.; Hahn, Christian D.

doi:10.2175/193864704784105913

Cited by 3 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…PMC BioTec asserts that the chemical treatment also mitigates foaming in reactors and enhances flux rates of the ultrafilters. To date this system has been tested and implemented at full-scale at a few industrial facilities (Wujcik et al, 2003;Rozich et al 2004). Depending on the strength of the wastewater, the effluent from the system may still require polishing to meet direct discharge criteria, or the effluent may need to be sent to a municipal WWTP for additional treatment.…”

Section: Integrated Ph and Temperature Adjustmentmentioning

confidence: 99%

Current State of the Practice of Sludge Reduction Technologies

Sandino¹,

Roxburgh²,

Whitlock³

et al. 2008

proc water environ fed

View full text Add to dashboard Cite

The handling and disposal of wastewater sludge is an increasingly costly portion of the operation of a wastewater treatment plant and is developing into an even greater future risk given the trend of decreasing availability and increasing costs of ultimate disposal options. Recently several technologies and process innovations have been proposed to reduce or eliminate the waste activated sludge (WAS) fraction resulting from treatment, or to render it more amenable to anaerobic digestion, a common sludge stabilization step, in order to maximize biogas production and the corresponding potential for energy cogeneration. Several of these technologies are also claiming significant improvements in the dewatering characteristics of the stabilized biosolids as a result of these pre-conditioning steps. The above claims are especially relevant for industrial facilities and smaller municipal facilities which frequently have no primary sludge but generate large quantities of difficult-to-dewater waste biomass. WERF's 05-CTS-3 Evaluation of Processes to Reduce Activated Sludge Solids Generation andDisposal, which started in the Spring of 2007, seeks to establish a comprehensive evaluation methodology for WAS reduction processes based on the in-depth consideration of a select number of technologies considered to be representative of the many options currently available in the marketplace. These technologies will cover both those intended to reduce the generation of residual sludge from the liquid treatment process, as well as those designed to pre-condition whatever sludge is produced in order to make it more amenable to a subsequent stabilization process such as anaerobic digestion. This paper presents the results of a literature review task conducted in the initial stages of the project, and is intended to be the first one of a series of papers in which the results of this important project are presented to the Residuals and Biosolids community of practitioners. This literature review places into perspective the basic mechanism behind the different WAS Reduction technologies, finding applications worldwide, identifying their application point within the treatment facility (i.e., digestion pretreatment, treatment of activated sludge recycle streams), and defining its development status.

show abstract

Section: Integrated Ph and Temperature Adjustmentmentioning

confidence: 99%

Current State of the Practice of Sludge Reduction Technologies

Sandino¹,

Roxburgh²,

Whitlock³

et al. 2008

proc water environ fed

View full text Add to dashboard Cite

show abstract

“…Furthermore, other valuable advantages consist in faster chemical reaction rates, increased organics solubility, high process stability, that is, the prompt activity recovery after operational changes, capability of degrading high salinity and biorecalcitrant wastewater, and possibility of integrating the thermophilic stage, as a pretreatment into a combined scheme, thus improving the removal extent of organic substances [76,78,79]. Nevertheless, despite the aforementioned advantages, thermophilic processes are still rarely adopted at the real scale [80,81].…”

Section: Introductionmentioning

confidence: 99%

Rheology and Microbiology of Sludge from a Thermophilic Aerobic Membrane Reactor

Abbà

Collivignarelli

Manenti

et al. 2017

Journal of Chemistry

View full text Add to dashboard Cite

A thermophilic aerobic membrane reactor (TAMR) treating high-strength COD liquid wastes was submitted to an integrated investigation, with the aim of characterizing the biomass and its rheological behaviour. These processes are still scarcely adopted, also because the knowledge of their biology as well as of the physical-chemical properties of the sludge needs to be improved. In this paper, samples of mixed liquor were taken from a TAMR and submitted to fluorescent in situ hybridization for the identification and quantification of main bacterial groups. Measurements were also targeted at flocs features, filamentous bacteria, and microfauna, in order to characterize the sludge. The studied rheological properties were selected as they influence significantly the performances of membrane bioreactors (MBR) and, in particular, of the TAMR systems that operate under thermophilic conditions (i.e., around 50 ∘ C) with high MLSS concentrations (up to 200 gTS L −1 ). The proper description of the rheological behaviour of sludge represents a useful and fundamental aspect that allows characterizing the hydrodynamics of sludge suspension devoted to the optimization of the related processes. Therefore, in this study, the effects on the sludge rheology produced by the biomass concentration, pH, temperature, and aeration were analysed.

show abstract

“…The aim of chemical oxidation depends on the stream where it could be applied: for instance, UF/NF permeate (COD removal improvement) or NF concentrate (improvement of organic matter biodegradability before recirculation into biological reactor). On the other hand, field experience (Rozich et al 2004) has also shown that chemical oxidation could control foaming and enhance flux rates of UF. doi: 10.2166/wst.2010.793 Oxidation processes studied in this work (ozonation and UV/H 2 O 2 ) were chosen due to the fact that the Company already owns specific equipments; this research, in fact, was aimed at evaluating existing facilities efficiency rather than at identifying optimum chemical oxidation process.…”

mentioning

confidence: 99%

Integration between chemical oxidation and membrane thermophilic biological process

Bertanza

Collivignarelli

Crotti

et al. 2010

Water Science and Technology

View full text Add to dashboard Cite

Full scale applications of activated sludge thermophilic aerobic process for treatment of liquid wastes are rare. This experimental work was carried out at a facility, where a thermophilic reactor (1,000 m(3) volume) is operated. In order to improve the global performance of the plant, it was decided to upgrade it, by means of two membrane filtration units (ultrafiltration -UF-, in place of the final sedimentation, and nanofiltration -NF-). Subsequently, the integration with chemical oxidation (O(3) and H(2)O(2)/UV processes) was taken into consideration. Studied solutions dealt with oxidation of both the NF effluents (permeate and concentrate). Based on experimental results and economic evaluation, an algorithm was proposed for defining limits of convenience of this process.

show abstract

Design and Operation of a High Strength Organic Wastewater Treatment System to Approach Zero Net Sludge Production at a Specialty Chemical Plant

Cited by 3 publications

References 0 publications

Current State of the Practice of Sludge Reduction Technologies

Current State of the Practice of Sludge Reduction Technologies

Rheology and Microbiology of Sludge from a Thermophilic Aerobic Membrane Reactor

Integration between chemical oxidation and membrane thermophilic biological process

Contact Info

Product

Resources

About