Cauble, Amanda

Amanda Cauble is an Associate Engineer in the Planning and Applied Research Group at Central Contra Costa Sanitary District (Central San) in Martinez, California. She received her B.S. in Environmental Engineering and M.S. in Civil and Environmental Engineering from Cal Poly, San Luis Obispo, and is a professional civil engineer in the State of California. Amanda has worked in the public and private sector for over 15 years and has experience in collection system and recycled water pipeline design, wastewater treatment planning and research projects. She manages research projects, planning and preliminary design projects at Central San’s wastewater treatment plant. Amanda has served as a local section leader and state committee lead in California Water Environment Association. When she is not working she is gardening and advocating for recycled water use.

Titles from this speaker

Sustainable Membrane Performance for Refinery Reuse of Non-nitrified Wastewater

Abstract

Central San owns and operates a wastewater treatment plant with a low solids retention time (SRT) activated sludge secondary treatment process. Low SRT secondary effluent can be challenging to filter and MF/UF vendors typically specify operation on a higher SRT fully nitrified secondary effluent. The goals of the pilot were to establish sustainable operating conditions for both MF/UF and RO as well as demonstrate that the product water would be fit for purpose for non-potable industrial reuse (low TDS, ammonia, and metals) at two nearby refineries. The pilot provided critical information to confirm that non-potable refinery reuse is achievable without upstream secondary treatment upgrades. Sustainable MF/UF fluxes up to 40 gfd with 2.5 mg/L ferric chloride as Fe and up to 30 gfd with 10 mg/L aluminum chlorohydrate coagulants were observed. The RO operated sustainably for almost three months and did not require a CIP.

To augment regional water supplies with recycled water, Central San completed parallel piloting of three different ultrafiltration membranes and reverse osmosis to define performance on non-nitrified secondary effluent. The challenging effluent was successfully treated, and sustainable design fluxes were achieved with low coagulant dosages. Preliminary water quality targets were met while operating at typical municipal flux targets.

SpeakerCauble, Amanda

Presentation time

16:30:00

16:50:00

Session time

15:30:00

17:00:00

SessionRefining Wastewater Effluent for Purification: Reuse-nutrient Removal-nexus II

Session locationRoom S404a - Level 4

TopicIntermediate Level, Municipal Wastewater Treatment Design, Nutrients, Potable Reuse, Water Reuse and Reclamation

Author(s)

Cauble Amanda

Author(s)C. Amanda 1; A. Branch 2 ; C. Cauble Amanda 1; D. Frost 3; S. Reddy 4;

Author affiliation(s)Central Contra Costa Sanitary District 1; Carollo Engineers 2 ; Central Contra Costa Sanitary District, Martinez, CA 1; Central Contra Costa Sanitary District 3; Carollo Engineers 4;

SourceProceedings of the Water Environment Federation

Document typeConference Paper

PublisherWater Environment Federation

Print publication date Oct 2023

DOI10.2175/193864718825159135

Volume / Issue

Content sourceWEFTEC

Word count10