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Home My WebLink About _ 4.11(d)--Purchase Lagoon Aerators for Stillwater Wastewater Treatment Plant GI �" Y � F � � � ° � � � " � � CITY OF REDDING REPORT TO THE CITY COUNCIL MEETING DATE: July 18, 2023 FROM: Chuck Aukland,Public ITEM NO. 4.11(d} Works Director ***APPROVED BY*** � ��n � .�.._ s.N,.�� ukl�n�l,H'ciblic Wc�aks L'��reGt ' 7�'3/2423 ry ip}�in,�C"i ana � 7113/2423 caulcland@ci.redding.ca.us btippin@cityofredding.org SUBJECT: 4.11(d)--Purchase Lagoon Aerators for the Stillwater Wastewater Treatment Plant Recommendation Authorize and approve the following: (1) Make a finding that Aerator Solutions will be the sole-source product for the upcoming Facultative Sludge Lagoon as a two-year pilot project; and (2) Authorize the purchase as proposed by the Trial and Buy Agreement (Aerator Solutions Project Summary and Proposal) with Aerator Solutions to purchase Lagoon Aerators for the City of Redding Stillwater Wastewater Treatment Plant for a total price not to exceed$315,000. Fiscal Impact The initial cost of purchase is $120,000 plus sales tax and fees of$20,000 with the option of an additional $150,000 plus sales tax and fees of $25,000 at the end of the trial for a total not to exceed amount of$315,000. Funds for this project are included and available in the Wastewater Utility budget. Alternative Action The City Council may choose not to authorize this purchase of equipment for a pilot project. By doing so, the project will move forward with aerators being awarded by public bid. This would allow for the least expensive product instead of the more efficient option, therefore potentially costing more over the life of the equipment. Background/Analysis Staff retained a consultant to assist with t h e design of Facultative Sludge Lagoons (FSLs) for the Stillwater Wastewater Treatment Plant (SWWTP) to ensure compliance with environmental regulations and provide a long-term sustainable solution to the disposal of biosolids from both wastewater treatment plants. These FSLs will serve as aerobic digestion vessels to break down biosolids and organic compounds from SWWTP. The resultant sludge produced will be dried in large Sludge Drying Beds (SDBs) and then trucked to the pyrolysis reactor at the CCWWTP. Report to Redding City Council July 13, 2023 Re: 4.11(d)--Purchase Lagoon Aerators for Stillwater Wastewater Treatment Plant Page 2 Aerators are required on FSLs to promote bacteria growth to assist in the overall treatment efficiency, reduce unpleasant odors, and reduce overall sludge volume. The operation of aeration systems in FSLs typically utilizes a surface aeration system and is one of the most expensive processes within the plant. Finding the most efficient system that minimizes operational costs by lessening electricity consumption, reducing solids volume, drying tiine, transportation costs, and staff time is important for long term sustainability. In order to ensure the City of Redding is purchasing the most efficient system, Aerator Solutions has proposed to offer a trial and buy agreement �or two types of FSL aeration systems, to run side by side for a two-year pilot. The pilot project would consist of installing Ecojet aerators, a typical surface aeration system, in one FSL and the more expensive Blue Frog aerators in another at the same cost as the Ecojets and operating the FSLs for two years. The Blue Frog product is a new type of hybrid aerator that functions both as a mixer and a passive aerator moving water laterally through the water column. It is a truly unique product not available from any other source. At the end of the two-year period, both FSLs will be dredged and dried on separate drying beds. If the Bl�ue Frog aerators reduce sludge vol�ume by 20% more than the Ecojet aerators, the City will have the option to purchase additional Blue Frog aerators at a discounted price, or Aerator Solutions will reclaim them and supply the City with additional Ecojet aerators to replace the Blue Frog units at no additional cost. This pilot program would ensure that the City is making the most economical and operationally responsible decision, at the completion of the project with the best-performing aeration system, at a discounted cost. This proposal is for the purchase of the aeration equipment only. Staff is currently working on the design process for construction of the FSLs and installation of the aeration system through a competitive bid process. Public Contract Code 3400 (b) generally prohibits specifying particular product brand names or vendors from Public Works contracts with a provision to provide an equal or better product. However, Subdivision (c) of the same Article provides an exception for this reguirement "if the awarding authority, or its designee, makes a finding that is described in the invitation for bids or reguest for proposals that a particular material, product, thing, or service is designated by specific brand or trade name for any of the following purposes: (1) In order that a field test or experiment may be made to determine the producYs suitability for future use. (2) In order to match other products in use on a particular public improvement either completed or in the course of completion. (3) In order to obtain a necessary item that is only available from one source. (A) In order to respond to an emergency declared by a local agency, but only if the declaration is approved by a four-fifths vote of the governing board of the local agency issuing the invitation for bid or request for proposals. (B) In order to respond to an emergency declared by the state, a state agency, ar political subdivision of the state, but only if the facts setting forth the reasons for the finding of the emergency are contained in the public records of the autharity issuing the invitation for bid or request for proposals." Staff suggests provision (1) above is applieable to the Aerator Solutions proposal and requesting the City Council make a sole source finding for the pilot project. Report to Redding City Council July 13, 2023 Re: 4.11(d)--Purchase Lagoon Aerators for Stillwater Wastewater Treatment Plant Page 3 The City of Redding currently disposes of biosolids at the West Central land�ll. However, the State of California has implemented legislation (SB 1383) to reduce greenhouse gas emissions and air pollution, specifically targeting methane emissions from landfills. This legislation aims to increase recycling and divert organic waste, including biosolids, from landfills. As a result, biosolids will no longer be allowed as cover in landfills, and alternative methods for disposal will need to be found. The Biosolids Pyrolysis project under construction at the Clear Creek Wastewater Plant (CCWWTP) will process biosolids into high-quality biochar for beneficial reuse and divert the wastewater solids from landfill disposal. Finding a aeration product that mini�nizes biosolid production is desirable and will minimize overall process expense. Environmental Review The purchase of materials or equipment is not a project as defined by the California Environmental Quality Act(CEQA), and no further action is required. As the design for the FSL project progresses, the project will undergo environmental review in compliance with CEQA. Council Priority/City Manager Goals � Government of the 21st Century — `Be relevant and proactive to the opportunities and challenges of today's residents and workforce. Anticipate the future to make better decisions today." Attachments ^Location Map ^Aerator Solutions Project Summary and Proposal ^BF Sludge Performance Eva1 P1an r... � , �' SR 2g9E. � � O � p �-�� n �ACRAMENTO RI�ER P � �.�v � p ,_..�.��-�.,�-�...... � ---�. L ALTURAS 2 SR 299W ,,�� P�CER �Y�'RESS SiQ � V�KING ��'" E. CYPRES � H RTNELL .. _ Q cl� _ � w z > w �C1 m � � ¢ /��//�� V/I / L/!- `� _ /��G W S�. N NN.�1\ p � RANCHO � 8� W � W � � � � � z Q � � ��, � KNIGHTON �� o� � �� s'�s% � � � �� Q� ) S� �-Q' DERSCH RD Q Sq �P `',� ��— `� ��F��Fti 'A �'p STILI_WAT�R WAST�WAT�R `,o TREATMENT PLANT (SWWTP) ��Es 6383 AIRPORT ROAD � pEs REDDING CA. /--� �i// / � fi/1�/1�7�./l♦ CITY OF REDDING �oF R�oo CITY OF REDDING ,� Z STILLWAT�R WASTEWATER � �. � TREATMENT PLANT PUBLIC WORKS � � � ° ' ENGINEERING DEPARTMENT ��oQ;c��P LOCATION MAP i � �:��5 ��r��t ��5��1L �i1�7� _� � ' � �� t � ��.... ��r�a��r��'��a�ti�er��e�� `�� n '��,��"n�� a�� ,��,.�4� �{�x.�>.�,�� F� :�15-�2��5111 , ��i�� '�"° � ��i�� F}(• �15-��3-�113 1��e 3�l, 2Q23 Mr'.�c�sh U"ar�diver �ity ofi R�clding, �A 2fl�5�Viki�t��1i"�y, 61dg.#3 Fteddisrg, C,� 96�7(l3 ��: SheiMa NilSen �nd Sarni f��t�er, Water��rk�-Er�gira�er� C�ear fV�r.1r'andiver, A�ratc�r Sc�l'u�i�r�s is v�ry Ar��er�sted i�r tnrt�rl�ir�g+�r�th th� C��ty c�f F��dding ��ity} �n thi��xcPting sicle-by- �i�� arr�p�ris�n��ur�ec�.�et��r�tc�rs and ��r SlueFr�rg�ircufat�r�. As�ve c��sca�sse�i dr�rir��tf��AprF� 18, 2��, c�ll, �ue�r� sending a pra��et s�rnmarw�a�� ar��a�sal d��ic�ing Aera�c�r Sca{�ati€�ns' sc��e fc�r�h� pr�aj�c�. Thi�is�t�w�a-year pr�ject sched�rf�d ta k�egir�late 2�324. Tt�� plan is tc� ir�stail ti�r�� HP �coJet A�ratQr� irr t�e firs�la��c�n �r��fi�e �5�3 d�P ��F��g Circulatars in the se�c��d la�ac�r�. °The�abje�tkve is t�det�rr�in� if�tr�re is a �d��ff�c�nt d�fference °rra t�� iofQ�ical�reatm�nt k��tween the (a��as. L�e have r�vi�w�d�nd dascusse�! �rpto�ns tc� m�l��thi�� rrrar� attr�ctive��f��fcar the city�s out[ira�d in �ur prc�posal ��rv�r. �i;+'e we[c�me additaor�ad discus��or�s�o �eep��s ��avir�g��rw�rart�f�r� ��cc�ssf�� ase study: �. A�ratcar Sol�t6ans r�rill s�p�ly�11 eq�Ep��t�nci a��es��ries tc�ir�st��l ar�d pc��rrer the �r�it� in each basi�. Th��ity is r�spc�nsikage�c�r pnsta9lin�t�e nece�sary pc�vuer supply t��ppart all units. 2. �h��ity will b� respo�sibl�far inst�(�it�g t��c�r�trc�P parae�s, rrt�t�r�rag p�sts�n� �ny c�ther structural c�rr�p�rn�nts pric�r t��he��ui��ent i��t�llation: 3, T�e�i�y�rt�l [ae th� r�spc�r�si�sle f�r sup�alyis��6� lab�r ar�d �quiprrrent ft�r i��ta9l�r�g th� �q��p�aent. A cra�e�rrd � sr�al0 be��t ar� re��r�rn��ded: �. �r�c� basir�s�re ready ft�r�qu�prr�erat�r�d th� pa�ver sc�urc�s�r� �nstaGled,A;��-atar 5�lut�c�ns w�11 �a��r�s�� t�a insyae�t the'ir�stal��ticn, �es�fc�rr�r sta��-u}� �af a1� et��iprnent��d �ir°c�v'sd�tra�9�`sr�g t� staff: 5. Th�Cit�r sk�all �aerfcar�th�ar�t��a{ mair�ten�r��af t�e uni�s as c�utlin�c� i�t�ae equipm�nt C��.IUt rraarru�l�, Aerat�r�ol�tiar�s wi[l pra�°id�th�;�a�c��ry trasnir��n� �upp+�rt tcs rraai�t�in�h� �� .�.T��- ��r��t �� IL ��73 e�"i��'�`�`�'�"t ��t��,��`��"��w:`r ��'��.�`"�:r�,�'-��af��,�.��e`; t� t��W��bY��i�€C�k9��C�f�d � ��1��I�� ; �� I'1� � :�1�—��-��.�,1 F]£� �1�-��711�. eq�i�men#. �C�TE: M'�int��an��et�ui}am��is rt��r�i�rr�� a�� r��sts�f or�� cate�itia� �il chang��rir��t�e stud+�peri�d. 6, Th� City w�ll �r�vide�;�eratcar St�l�atians wa�h initia�s�ud�e sarnple�, �rc�rnen�t��i�r� cafinf�uent �nd effl��t data f�r ea�h basin,�ar�c�any ci�ar�gest�fhe pr�ce��aver�F�� o�rse c�f th�twc�- ye�r st�dy. 7. A�r��r 5t��r��ans wi(� �erf��r�tuvo {2) sludg�sur�reys�v�r�th�d�ar��ic�n c�f t�e�v,o�-y�a�stu�y: �"��se wpl� c�cc�r�fi the �r�� t��ye�r�ane and tw� crf the study.A�ratar��ut�csn�wil� sh�re thes� r��ult�uvith th�cm�y. 5e�Attachrr�errt A for�e�a�ls. T��c�f�j��ive�ri�� e�o shc�w at i�ast a ��°o reduc�ie�� in the slud��c�r the �3��aeFr�� lagrac�n as ccarr-spared ��the Aeratt�r �agaarr, 1�at�I price fc�r tF�e A�r�t�wr St�lt�tic�ns��p��f su�ply is$�2�Q,OC��:�O p��as sal�s ta�. T`his�ov�rs fihe �cas� f�r�all c�nits, pow�r eable�, ra��c�rirrg ca�les, ac�ess�r6�s, ant� cc�ntr�l �a��l's. �"hi��Ism incl��es frei�h� �har��s�o the jo�asite ara�6��r S�lutaans serv�ces as describ�� kat�v�, P'ayme�t T�rms af the in��iaf c�sts vva�ald ta�5C�%d�� t��P�ys�ft�r ir�stal8at�on j�tart-�ap i��car-�p��t�d. 7�h�s�eon�15��pay��yuc�ul�J b��iu� c�ne(��r�ar fra�r�t�� n�taal��icar� d�t�. A�t�e era� of the�v�rc�-year stu�ly, �.era�t�r Sal�tiQn��v�f�s��iy the city writh a�l�ata ct�IP�cted;�urr�mary afthe r��rlts ar��i cc�mpari��rr betwe�c�the tw� par��s, Pfth� ��ue Frc,g un��s have �rave�� -edu�e the sl�dge �r�their la�ca�r� !�y��I��t��as ce�en�are�to th� �c�J�t Aer�t�rs �ag�c�n an� ��I cath�r tr�atm�r�t akaje�tiue�ar� k��ir��rr��t,�lae�f�yy rn�y prace�d w%th��he pur�hase csf BIu�Frog �n��s�r�r th� se��r�d ptan�. TP�� dd�t�eanaf �5� Bl�a� F�~�g �nit�+�rp(I b��vailable ta th� ��ty#or a dis��ntet� price �f�3fl,Cl�(3:�}CI pe� �ar�it($�.5�,��7Q tc�ta��c�c�iti�ra�d cc�stj. 7hi��s c�v�r �5°f"�t�iscot��€�ver kca�ay's lis��ri�e—at�+� +�re wifl h€�I�I t�rs pri��thr�aug�tF�� enc� �af t�e:study. fn �dditiar�;tP��ity v�i�l ke�p caw;r�ership c�F fh� (�� c�Jet A�ratars that c�r� b� usec��c�r supplerrr�nta� �reatmerat �f t��sir�d. !fi the study�P��s I�C�T�h�v��F�a��5l r�c�uct+an in sludg� in�� N�e��rc�g�a�sin,�,eratc�r Stalu�i�r�s vvill reral�v�t�� BIu�Fr��c�nits a�d hav��hem r�turr��cf t� tatar fttascc�e#acili�y. In a�Iditi�rt,A�r�tca�5�9t�tAt�r�s �+i�l �r�v��3� r�e�r(5) F-pP Ect�1�#A��atars tc�th� C�ty t�f Red�ir��a��o a�r�i�e�n�P�t�st: This v�rill ir��fude an��ddit��r�al c�bfe arad ccan�rcal pane(s tP�at may be re��ir�d f�r ir�st�l�ation. �'h� Prr�s��r�h��ity�f�edd��ncl�d��l��f��lcr+�rir��; @ A�r�tc�r S�rft��io�s will cc�nd�r��al� sfuc��e tes�in,g and' rep�art�r�g�r�d su�pNy the�city�vith re�ults � �i�y r�ce�ve�treatrt�er�t of�ath lagc�r�s fc��-tw�years arvit�r ��nimal b�d��t im��ct � Maint�nance raf equap��n�is very rt�inim�l a�d si�nple fc�r th�staff t��rper�te � �ity re��ives�f�ct��r�ted pri��r�g�r�addi�ic�r�aF �du�Frog�n�ts at t��e�d of tlae s��dy �. � �.17�� s��,I� �1�7� ��"��"��"�� `� ��::��"�'��:��`'° a�r� o��t�t��r�sp��r� . . i �6�:�15-�23-5�. �1 � i��a� �`�� ol�� d�: ��-6��-7�.1�. � Ai� ��sk is�aken by A��at�r St�lutior�s (Fthe BE�aeFr��s�erf+�rm a��x�ectet� ant� can r�d�c��he �F�dg� Pev�Ps by a�fea�t 25f,thi�wi�l pravid�t�re city wit�r st��stan�ial ��st s�vin��v�r t3�� ro�xk��vera�yea�s, by redtaci��h�frequ�ney�f dr�dg�r�g and rern�uing sludg�from th� ��g�aons. L�t us kr��w if y�u hav� �r�y�uesti�ans. 'uV� I�re��ft�rwarc(��enrc�r4�ing w[t'h you: rncerety. J �4. A�°ne�ld V�ce Presider�t��Gen��-aP �anager �1lc�b�le: 815-s�[]-77�'� ��f'sce: 8�.�-��3-5�.1� ��rr��ald�.s��car��uti��s �ar� Attach�e�t"A"-2C723.�?5.t}3 �l�ae Fr�g Slt�d�e ��rf,ar�arr�e ��ra��aatmc�n -Reddi��GA ��ra�rx�-�,� �ra�E�tur��n�r�r�.��a-ria�or��s�n� � � � � � � I � M��I�It3I��L�A�C7S �h VUITF� Et�Ul�fulEf�T J -- � DISCC7Nh1EG`TS f I�ILET L(7CA7It7N k "~- 3�1'LE�'�.{�CATI{3N �` :.. .. , ;`'�_ j �� , . ,J __-------__ • -. ." � � ._—�� , � , � �� —_ '� fF .. �� l ��. $� �. FL�IATIIV�AEftA"f C?R, � TYP��3 � � � ` � � � I ��T��a�H��i4 � f A��aT��t�r�P t�F� 8 � r�ar��ir��w�r�,�r^r� � � f � � F I I „ a � � � � � I � I n�c�Q��aa�L.�Ra, � I i � �-v�: I R � P, i p I � � � g I � � � � FSL 1 FSL 2 f \ / � , �- _� _,_—�� ' i -- .. __.__ _.,.- _.._. ___.—__ —:_:__—_..,._ __ "`_� � `� � _ ......— -' � ` _,. — � � _ ,��.w_-__,—�—r -_c ..,-= � _ t�UTLE�L{7CATIQM — — � �-�::��€�t�,�,� �c��.a��t`��ra� Prepared for: Jeff Arnold, Vice President & General Manager, Aerator Solutions, 11765 Main Street, Roscoe, IL 61073 Prepared by: 1im Waliy, PE, Innovative Waste Consuiting Services, LLC (IWCS) dba Innovative Technical Solutions, Address: 3720 NW 43rd Street Suite 103, Gainesville FL 32606; Contact Email: ivv�il�C��nrae��r�tiu��e�,Gcar� Proiect Understandin� Aerator Solutions offers a lagoon treatment technology referred to as the Blue Frog System (BFS). BFS are hypothesized to provide flow patterns which densify sludge and encourage anaerobic digestion of wastewater in lower regions of a treatment lagoon while maintaining aerobic treatment for upper regions.This treatment pattern may result in granular sludge, and/or denser sludge which may require less frequent removal from lagoons. Aerator Solutions is interested in quantifying the performance of a proposed BFS installation for Redding CA.This site has two existing sludge stabilization ponds.The site operators are interested in the potential for BFS to digest and or densify sludge to increase the long-term capacity of the sludge stabilization ponds, and is considering testing different systems in the different ponds to evaluate performance.This represents an opportunity to measure the performance of the BFS in parallel with another system. ITS has previously performed an evaluation on a BFS installation in Jacksonville, NC which has a BFS installation.This study showed evidence that BFS may be densifying sludge. ITS evaluation also showed evidence that indicated the presence of granular sludge in the BFS lagoon.The conclusions about the efficacy of the BFS were limited by the limited data availability about sludge distribution and characteristics before the installation of BFS. ITS and Aerator Solutions have recognized the potential of the Redding, CA project as an opportunity to collect data to better characterize the performance of BFS. Scope of Services Task 1—Sampling Plan Development ITS will develop a sampling and data collection plan for the sludge aeration ponds at the Redding, CA site.This sampling plan will include locations and depths of sludge measurements, and water quality measurements, as well as sample collection locations and depths for sludge characterization tests. ITS will provide an inventory of materials and equipment which may be used to conduct this sampling effort. ITS will also coordinate sampling containers from third-party laboratories. Task 2—Sludge Sampling Event,Year 1 ITS will conduct an initial site visit to measure the depth and distribution of the sludge at the Redding, CA site after 12 to 18 months of operation. Sludge volume is expected to be measured via a sonar unit, and confirmed via a physical measurement such as a sludge judge. Biodegradable content is expected to be measured through collected laboratory samples, using BOD and total volatile solids as measures of � �-�::��€�t�,�,� �c��.a��t`��ra� degradable sludge content. ITS will conduct sludge measurements, and collect up to 21 sludge samples from various depths and locations in the treatment lagoon. Samples will be collected and shipped for third-party laboratory analysis. ITS will measure sludge depth and collect samples via a discrete depth sampler(i.e., a "sludge judge") or a peristaltic water pump depending on sludge density. Sludge density will be measured in the field by filtering a known volume of sludge and measuring the resulting filtered solids on a field scale.The presence of granular sludge will be tested based on measurements of sludge settlement over a period of roughly five minutes. Task 3—Sludge Volume and Characteristic Evaluation,Year 1 ITS will evaluate data collected during Task 2, including laboratory analysis provided on samples collected in Task 1.The project team will provide an assessment of average sludge density and average degradable fraction based on field and laboratory data. ITS will use geospatial analysis software (Ex. ArcGIS, QGIS, or AutoCAD)to create a sludge surface map based on data collected according to the plan specified in task 1. ITS will compare this surface to as-built bottom elevations to calculate an approximate sludge volume. Task 4—Follow-up Sampling Event,Year 2 ITS will conduct a follow-up site visit and evaluation between 18 and 30 months after the installation of the BFS at the Redding, CA site. ITS will repeat sludge measurements including distribution, density, chemical characteristics, and settling velocities. ITS will compare this sludge volume to sludge volumes calculated in previous years, if applicable,to calculate a year over year percent change in sludge volume. This sludge volume value will be used in concert with the sludge density and degradable fraction to calculate a percent change in degradable sludge year over year. Task 5—Sludge Volume and Characteristic Evaluation,Year 2 ITS will compare results of Year 1 and Year 2 sampling events and produce a results memo which will discuss two-year performance of BFS.This will include an analysis of sludge density and growth rates, and changes in sludge characteristics over-time. Deliverables The project team anticipates the following meetings and deliverables to complete the above project scope. - Sludge Sampling and Analysis Plan - BFS 1-year Performance Evaluation Memo - BFS 2-year Performance Evaluation Memo Note that we have provided this scope of work based on the best available information at the time of proposal preparation. We will closely coordinate with Aerator Solutions prior to and during work task execution to identify any major barriers or unforeseen circumstances that would substantially change the scope of work. The project team will proceed with task 1 immediately with a written approval from Aerator Solutions. Task 2 may be initiated from 12 to 24 months after installation of BFS system, and task � �-�::��€�t�,�,� �c��.a��t`��ra� 4 roughly 12 months after that.Tasks 3 and 5 are expected to be completed approximately 4 weeks after receipt of all sampling data and laboratory analysis results for the sampling event. Tabte 2.Leve!of Effor£by Task for the Evatuation of Blue Frag�teratar Performance. M � � � � Task 1 5ampling Plan Development ' Included Sludge Sampling Event,Ye�r Task 2 1 Included Sludge Volume and Task 3 Characteristic Evaluation, Included Year 1 Sludge Sampli'r�g Event,Year 7ask 4 � Included Sludge Uolume and Task 5 ' Characteristic Evaluation, Included Year 2 Limitations This project scope for tasks 2 and 4 assumes that the sludge treatment ponds will be made accessible by site staff to ITS personnel for 5 days, and that a boat will be furnished by site operators to access the pond.This scope also assumes that sludge characterization can be scheduled to occur within appropriate timeframes after BFS installation.